Document:

<PAGE>
                                                                    EXHIBIT 10.1
                                                   Redacted Copy (Deletions ***)

                          Supplemental Agreement No. 15

                                       to

                           Purchase Agreement No. 1810

                                     between

                               The Boeing Company

                                       and

                             SOUTHWEST AIRLINES CO.

                    Relating to Boeing Model 737-7H4 Aircraft

         THIS SUPPLEMENTAL AGREEMENT, entered into as of JANUARY 16, 2001, by
and between THE BOEING COMPANY, a Delaware corporation with its principal
offices in Seattle, Washington, (Boeing) and SOUTHWEST AIRLINES CO., a Texas
corporation with its principal offices in City of Dallas, State of Texas
(Buyer);

         WHEREAS, the parties hereto entered into Purchase Agreement No. 1810
dated January 19, 1994, relating to Boeing Model 737-7H4 aircraft (the
Agreement) and;

         WHEREAS, Buyer has agreed to accelerate two (2) Block E Aircraft from
July 2001 to June 2001, and to accelerate three (3) Block I Aircraft from
January 2002 to one (1) December 2001 and two (2) November 2001, and to
accelerate one (1) Block T Aircraft from May 2002 to November 2001.

         NOW THEREFORE, in consideration of the mutual covenants herein
contained, the parties agree to amend the Agreement as follows:

1. The Table of Contents of the Agreement is deleted in its entirety and a new
Table of Contents is attached hereto and incorporated into the Agreement by this
reference.

2. Article 2, entitled "Delivery, Title and Risk of Loss," paragraph 2.1,
entitled "Time of Delivery," is deleted in its entirety and replaced by a new
paragraph 2.1 revised to change the quantity of

*** PURSUANT TO 17 CFR 240.24b-2, CONFIDENTIAL INFORMATION HAS BEEN OMITTED AND
HAS BEEN FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT
TO A CONFIDENTIAL TREATMENT APPLICATION FILED WITH THE COMMISSION.

                                    SA-15-1

P.A. No. 1810
K/SWA
<PAGE>

Block E Aircraft delivering in July 2001 from three (3) to one (1), to add two
(2) Block E Aircraft delivering in June 2001, to change the quantity of Block I
Aircraft delivering in January 2002 from four (4) to one (1), to add two (2)
Block I Aircraft delivering in November 2001, and to add one (1) Block I
Aircraft delivering in December 2001, to change the quantity of Block T Aircraft
delivering in May 2002 from two (2) to one (1), and to add one (1) Block T
Aircraft delivering in November 2001. Such new pages 2-1, 2-2 and 2-3 are
attached hereto and incorporated into the Agreement by this reference.

3. Article 3, entitled "Price of Aircraft", paragraph 3.4 entitled "Advance
Payment Base Price", subparagraph 3.4.1 entitled "Advance Payment Base Price" is
revised by adding an Advance Payment Base Price for the Block E Aircraft
delivering in June 2001, the Block on Block T Aircraft delivering in November
2001. Such new pages 3-1, 3-2, 3-3 and 3-4 are attached hereto and incorporated
into the Agreement by this reference.

4. All references in the Letter Agreements associated with Purchase Agreement
No. 1810 shall be deemed to refer to the purchase by Buyer of two hundred thirty
six Model 737-7H4 Aircraft, eighty seven (87) Model 737-7H4 Option Aircraft and
two hundred seventeen (217) Model 737-7H4 Rollover Option Aircraft, to the
extent such reference is not specifically addressed herein.

5. As a result of this Supplemental Agreement, Buyer owes Boeing ***. Such
amount reflects the difference in advance payments due as a result of the
acceleration of the two (2) Block E Aircraft, the three (3) Block I Aircraft,
and the one (1) Block T Aircraft. Buyer will pay Boeing *** upon execution of
this agreement and will reduce the amount paid to Boeing on February 1, 2001 for
Advance Payments of *** by ***.

The Agreement will be deemed to be supplemented to the extent herein provided
and as so supplemented will continue in full force and effect.

EXECUTED IN DUPLICATE as of the day and year first above written.

THE BOEING COMPANY                   SOUTHWEST AIRLINES CO.

By: /s/ K. J. JOHNSTON               By: /s/ LAURA WRIGHT
    -----------------------              -------------------

Its: Attorney-In-Fact                Its: Treasurer
     ----------------------               ------------------

                                    SA-15-2

P.A. No. 1810
K/SWA
<PAGE>

                               PURCHASE AGREEMENT

                                     between

                               THE BOEING COMPANY

                                       and

                             SOUTHWEST AIRLINES CO.

                    Relating to Boeing Model 737-7H4 Aircraft

                         Purchase Agreement Number 1810

P.A. No. 1810
K/SWA
<PAGE>

                                TABLE OF CONTENTS

<Table>
<Caption>
                                                                         Page        SA
ARTICLES                                                               Number    Number
--------                                                               ------    ------
<S>        <C>                                                         <C>       <C>

1.         Subject Matter of Sale..........................................1-1    SA-13

2.         Delivery, Title and Risk
           of Loss.........................................................2-1    SA-15

3.         Price of Aircraft...............................................3-1    SA-15

4.         Taxes...........................................................4-1

5.         Payment.........................................................5-1

6.         Excusable Delay.................................................6-1

7.         Changes to the Detail
           Specification...................................................7-1     SA-1

8.         Federal Aviation Requirements and
           Certificates and Export License.................................8-1

9.         Representatives, Inspection,
           Flights and Test Data...........................................9-1

10.        Assignment, Resale or Lease....................................10-1

11.        Termination for Certain Events.................................11-1

12.        Product Assurance; Disclaimer and
           Release; Exclusion of Liabilities;
           Customer Support; Indemnification
           and Insurance..................................................12-1

13.        Buyer Furnished Equipment and
           Spare Parts....................................................13-1

14.        Contractual Notices and Requests...............................14-1

15.        Miscellaneous..................................................15-1
</Table>

                                       i

P.A. No. 1810                                                              SA-15
K/SWA

<PAGE>

                                TABLE OF CONTENTS

<Table>
<Caption>
                                                                           SA
EXHIBITS                                                               Number
--------                                                               ------
<S>           <C>                                                     <C>

A              Aircraft Configuration                                  SA-13

B              Product Assurance Document                              SA-1

C              Customer Support Document

D              Price Adjustments Due to
               Economic Fluctuations - Aircraft                        SA-13

E              Buyer Furnished Equipment
               Provisions Document

F              Defined Terms Document

LETTER AGREEMENTS
-----------------

1810-1         Waiver of Aircraft Demonstration Flight
</Table>

                                     ii

P.A. No. 1810                                                              SA-15
K/SWA
<PAGE>

                                TABLE OF CONTENTS

<Table>
<Caption>
                                                                            SA
RESTRICTED LETTER AGREEMENTS                                            Number
----------------------------                                            ------
<S>                           <C>                                     <C>

6-1162-RLL-932R2               Promotional Support                      SA-13

6-1162-RLL-933R9               Option Aircraft                          SA-13

6-1162-RLL-934R3               Disclosure of Confidential               SA-14
                               Information

6-1162-RLL-935R1               Performance Guarantees                   SA-1

6-1162-RLL-936R4               Certain Contractual Matters              SA-4

6-1162-RLL-937                 Alternate Advance Payment Schedule

6-1162-RLL-938                 ***

6-1162-RLL-939R1               Certification Flight Test Aircraft       SA-1

6-1162-RLL-940R1               Training Matters                         SA-1

6-1162-RLL-941R2               Other Matters                            SA-13

6-1162-RLL-942                 Open Configuration Matters

6-1162-RLL-943R1               Substitution Rights                      SA-6

6-1162-RLL-944                 Airframe Maintenance Material Cost
                               Protection Program

6-1162-RLL-945                 Comparison of 737-7H4 and 737-3H4
                               Block Fuel Burn

6-1162-RLL-1855R3              Additional Contractual Matters           SA-4

6-1162-RLL-1856                ***                                      SA-1

6-1162-RLL-1857                Service Ready Validation Program         SA-1
                               Field Test

6-1162-RLL-1858R1              Escalation Matters                       SA-4
</Table>

                                      iii

P.A. No. 1810                                                              SA-15
K/SWA
<PAGE>

                             TABLE OF CONTENTS CON'T

<Table>
<Caption>
                                                                             SA
RESTRICTED LETTER AGREEMENTS                                             Number
----------------------------                                             ------
<S>                           <C>                                     <C>

6-1162-RLL-2036                Amortization of Costs for
                               Customer Unique Changes                   SA-1

6-1162-RLL-2037                Reconciliation of the Aircraft            SA-1
                               Basic Price

6-1162-RLL-2073                Maintenance Training Matters              SA-1

6-1162-KJJ-054                 Business Matters                          SA-13

6-1162-KJJ-055                 Structural Matters                        SA-13

6-1162-KJJ-056                 Noise and Emission Matters                SA-13

6-1162-KJJ-057                 Product Development Matters               SA-13

6-1162-KJJ-058                 Additional Substitution Rights            SA-13

6-1162-KJJ-150                 Flight Control Computer & Mode            SA-14
                               Control Panel Spares Matter
</Table>

                                       iv

P.A. No. 1810                                                              SA-15
K/SWA
<PAGE>

                           PURCHASE AGREEMENT NO. 1810

                                   Relating to

                          BOEING MODEL 737-7H4 AIRCRAFT

                                   ----------

         This Agreement is entered into as of January 19th 1994, by and between
The Boeing Company, a Delaware corporation, with its principal office in
Seattle, Washington (Boeing), and Southwest Airlines Co., a Texas corporation,
with its principal office in the City of Dallas, State of Texas (Buyer).

Accordingly, Boeing and Buyer agree as follows:

                                       1

P.A. No. 1810
K/SWA
<PAGE>

ARTICLE 1. Subject Matter of Sale.

         1.1 The Aircraft. Subject to the terms and conditions of this
Agreement, Boeing will manufacture and deliver to Buyer and Buyer will purchase
and accept delivery from Boeing of one hundred forty-two (142) Boeing Model
737-7H4 aircraft (the Aircraft) manufactured in accordance with Boeing Detail
Specification D6-38808-1, dated October 30, 1996, as described in Exhibit A, and
ninety-four (94) Boeing Model 737-7H4 (the Aircraft) manufactured in accordance
with Boeing Detail Specification D6-38808-1, Revision A, dated February 24, 1998
as described in Exhibit A-1, as modified from time to time in accordance with
this Agreement (Detail Specification).

         1.2 Additional Goods and Services. In connection with the sale of the
Aircraft, Boeing will also provide to Buyer certain other things under this
Agreement, including data, documents, training and services, all as described in
this Agreement.

         1.3 Performance Guarantees. Any performance guarantees applicable to
the Aircraft will be expressly included in this Agreement. Where performance
guarantees are included in this Agreement other than within the Detail
Specification, such guarantees will be treated as being incorporated in the
Detail Specification by this reference.

         1.4 Defined Terms. For ease of use, certain terms are treated as
defined terms in this Agreement. Such terms are identified with a capital letter
and set forth and/or defined in Exhibit F.

                                      1-1

P.A. No. 1810                                                              SA-13
K/SWA
<PAGE>

ARTICLE 2. Delivery, Title and Risk of Loss.

         2.1 Time of Delivery. The Aircraft will be delivered to Buyer by
Boeing, assembled and ready for flight and Buyer will accept delivery of the
Aircraft, in accordance with the following schedule:

             Month and Year
               of Delivery                           Quantity of Aircraft
             --------------                          --------------------
                                Block A Aircraft

             October 1997                                     Two (2)
             November 1997                                    Two (2)

                                Block B Aircraft

             January 1998                                     Two (2)
             February 1998                                    Three (3)
             March 1998                                       Two (2)
             April 1998                                       Two (2)
             May 1998                                         Two (2)
             June 1998                                        One (1)
             July 1998                                        Two (2)
             September 1998                                   Two (2)

                                Block C Aircraft

             February 1999                                    Four (4)
             May 1999                                         Four (4)
             July 1999                                        Four (4)
             August 1999                                      One (1)
             September 1999                                   Three (3)

                                Block D Aircraft

             November 1999                                    Two (2)
             December 1999                                    One (1)
             January 2000                                     One (1)
             March 2000                                       Four (4)
             July 2000                                        Four (4)
             August 2000                                      Three (3)

                                Block E Aircraft

             December 2000                                    Two (2)
             January 2001                                     One (1)
             February 2001                                    One (1)
             March 2001                                       Two (2)
             June 2001                                        Two (2)
             July 2001                                        One (1)
             September 2001                                   Three (3)

                                       2-1

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K/SWA
<PAGE>

                                Block F Aircraft

             October 1998                                     One (1)
             November 1998                                    Two (2)
             December 1998                                    Two (2)

                                Block G Aircraft

             March 1999                                       Two (2)

                                Block H Aircraft

             June 1999                                        Two (2)
             July 1999                                        One (1)
             August 1999                                      One (1)
             September 1999                                   Two (2)
             October 1999                                     One (1)
             March 2000                                       One (1)
             April 2000                                       Two (2)
             September 2000                                   One (1)
             October 2000                                     Two (2)
             March 2001                                       Two (2)
             April 2001                                       One (1)
             October 2001                                     Three (3)

                                Block I Aircraft

             November 2001                                    Two (2)
             December 2001                                    One (1)
             January 2002                                     One (1)
             March 2002                                       Four (4)
             April 2002                                       Two (2)
             July 2002                                        Four (4)
             October 2002                                     Four (4)

                                Block J Aircraft

             January 2003                                     Four (4)
             March 2003                                       One (1)

                                Block K Aircraft

             April 2004                                       Two (2)
             July 2004                                        Three (3)

                                Block L Aircraft

             October 1999                                     One (1)
             November 1999                                    Two (2)
             December 1999                                    One (1)
             June 2000                                        Three (3)
             July 2000                                        Three (3)
             September 2000                                   One (1)

                                       2-2

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K/SWA
<PAGE>

             October 2000                                     One (1)
             November 2000                                    Four (4)
             December 2000                                    One(1)
             January 2001                                     One (1)
             February 2001                                    One (1)
             July 2001                                        One (1)
             September 2001                                   One (1)
             October 2001                                     One (1)
             September 2002                                   Three (3)

                                Block T Aircraft

             November 2001                                    One (1)
             February 2002                                    One (1)
             May 2002                                         One (1)
             June 2002                                        Two (2)
             July 2002                                        One (1)
             August 2002                                      Two (2)
             November 2002                                    Two (2)
             February 2003                                    One (1)
             May 2003                                         Two (2)
             June 2003                                        Two (2)
             August 2003                                      Three (3)
             February 2004                                    Three (3)
             March 2004                                       Three (3)
             April 2004                                       One (1)
             May 2004                                         Four (4)
             June 2004                                        Three (3)
             July 2004                                        Two (2)
             August 2004                                      Two (2)
             September 2004                                   Two (2)
             October 2004                                     Two (2)
             November 2004                                    Two (2)
             February 2005                                    One (1)
             May 2005                                         One (1)
             June 2005                                        One (1)
             August 2005                                      One (1)
             September 2005                                   One (1)
             February 2006                                    Three (3)
             March 2006                                       One (1)
             May 2006                                         Three (3)
             June 2006                                        Four (4)
             July 2006                                        One (1)
             August 2006                                      Three (3)
             September 2006                                   Three (3)
             November 2006                                    Two (2)
             December 2006                                    Two (2)
             January 2007                                     Two (2)
             February 2007                                    Three (3)
             March 2007                                       Two (2)
             April 2007                                       Two (2)
             May 2007                                         Two (2)
             June 2007                                        Two (2)

                                       2-3

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K/SWA
<PAGE>

             July 2007                                        Two (2)
             August 2007                                      Two (2)
             September 2007                                   Two (2)
             October 2007                                     Two (2)
             November 2007                                    Two (2)
             December 2007                                    Two (2)

         2.2 Notice of Target Delivery Date. Boeing will give Buyer notice of
the Target Delivery Date of the Aircraft approximately 30 days prior to the
scheduled month of delivery.

         2.3 Notice of Delivery Date. If Boeing gives Buyer at least 7 days'
notice of the delivery date of the Aircraft, and an Aircraft delivery is delayed
beyond such delivery date due to the responsibility of Buyer, Buyer will
reimburse Boeing for all costs incurred by Boeing as a result of such delay,
including amounts for storage, insurance, Taxes, preservation or protection of
the Aircraft and interest on payments due.

         2.4 Place of Delivery. The Aircraft will be delivered at an airport
facility selected by Boeing in the State of Washington, unless mutually agreed
otherwise.

         2.5 Title and Risk of Loss. Title to and risk of loss of an Aircraft
will pass from Boeing to Buyer upon delivery of such Aircraft, but not prior
thereto.

         2.6 Bill of Sale. Upon delivery of an Aircraft Boeing will deliver to
Buyer a bill of sale conveying good title to such Aircraft, free of all liens,
claims, charges and encumbrances of every kind whatsoever, and such other
appropriate documents of title as Buyer may reasonably request.

                                       2-4

P.A. No. 1810                                                              SA-15
K/SWA
<PAGE>

ARTICLE 3. Price of Aircraft.

         3.1 Definitions.

                  3.1.1 Special Features are the features incorporated in
Exhibit A which have been selected by Buyer.

                  3.1.2 Base Aircraft Price is the Aircraft Basic Price
excluding the price of Special Features.

                  3.1.3 Aircraft Basic Price is comprised of the Base Aircraft
Price and the price of the Special Features.

                  3.1.4 Economic Price Adjustment is the adjustment to the
Aircraft Basic Price (Base Aircraft and Special Features) as calculated pursuant
to Exhibit D or Exhibit D-1 as applicable.

                  3.1.5 Aircraft Price is the total amount Buyer is to pay for
the Aircraft at the time of delivery.

         3.2 Aircraft Basic Price.

                  The Aircraft Basic Price for Block A through L Aircraft, is
expressed in July 1992 dollars; the Aircraft Basic Price for Block T Aircraft,
is expressed in July 1999 dollars; as set forth below:

                        Base                     Special            Aircraft
                        Aircraft Price           Features           Basic Price
Block A, B, C,                                   ***                ***
D & E Aircraft          ***
Block F & G                                      ***                ***
Aircraft                ***
Block H                                          ***                ***
Aircraft                ***
Block I                                          ***                ***
Aircraft                ***
Block J                                          ***                ***
Aircraft                ***
Block K                                          ***                ***
Aircraft                ***
Block L                                          ***                ***
Aircraft                ***

Block T                 ***                      ***                ***

Aircraft

                                       15-1

P.A. No. 1810
K/SWA
<PAGE>

         3.3 Aircraft Price. The Aircraft Price will be established at the time
of delivery of such Aircraft to Buyer and will be the sum of:

                  3.3.1 the Aircraft Basic Price, which is *** for the Block A,
B, C, D and E Aircraft, *** for the Block F and G Aircraft, *** for the Block H
Aircraft, *** for the Block I Aircraft, *** for the Block J Aircraft, *** for
the Block K Aircraft and *** for the Block L Aircraft; *** for the Block T
Aircraft; plus

                  3.3.2 the Economic Price Adjustments for the Aircraft Basic
Price, as calculated pursuant to the formulas set forth in Exhibit D (Price
Adjustments Due to Economic Fluctuations - Aircraft) for Aircraft Block A
through L, and in Exhibit D-1 (Price Adjustments Due to Economic Fluctuations -
Aircraft) for Aircraft Block T; plus

                  3.3.3 other price adjustments made pursuant to this Agreement
or other written agreements executed by Boeing and Buyer.

         3.4 Advance Payment Base Price.

                  3.4.1 Advance Payment Base Price. For advance payment
purposes, the following estimated delivery prices of the Aircraft (Advance
Payment Base Price) have been established, using currently available forecasts
of the escalation factors used by Boeing as of the date of signing this
Agreement. The Advance Payment Base Price of each Aircraft is set forth below:

             Month and Year of                        Advance Payment Base
             Scheduled Delivery                       Price per Aircraft

                               Block A Aircraft***

             October 1997
             November 1997

                               Block B Aircraft***

             January 1998
             February 1998
             March 1998
             April 1998
             May 1998
             June 1998
             July 1998
             September 1998

                                       15-2

P.A. No. 1810
K/SWA
<PAGE>

                               Block C Aircraft***

             February 1999
             May 1999
             July 1999
             August 1999
             September 1999

                               Block D Aircraft***

             November 1999
             December 1999
             January 2000
             March 2000
             July 2000
             August 2000

                               Block E Aircraft***

             December 2000
             January 2001
             February 2001
             March 2001
             June 2001
             July 2001
             September 2001

                               Block F Aircraft***

             October 1998
             November 1998
             December 1998

                               Block G Aircraft***

             March 1999

                               Block H Aircraft***

             June 1999
             July 1999
             August 1999
             September 1999
             October 1999
             March 2000
             April 2000
             September 2000
             October 2000
             March 2001
             April 2001
             October 2001

                                      15-3

P.A. No. 1810
K/SWA
<PAGE>

                               Block I Aircraft***

             November 2001
             December 2001
             January 2002
             March 2002
             April 2002
             July 2002
             October 2002

                               Block J Aircraft***

             January 2003
             March 2003

                               Block K Aircraft***

             April 2004
             July 2004

                               Block L Aircraft***

             October 1999
             November 1999
             December 1999
             June 2000
             July 2000
             September 2000
             October 2000
             November 2000
             December 2000
             January 2001
             February 2001
             July 2001
             September 2001
             October 2001
             September 2002

                               Block T Aircraft***

             November 2001
             February 2002
             May 2002
             June 2002
             July 2002
             August 2002
             November 2002
             February 2003
             May 2003

                                     15-4

P.A. No. 1810
K/SWA
<PAGE>

             June 2003
             August 2003
             February 2004
             March 2004
             April 2004
             May 2004
             June 2004
             July 2004
             August 2004
             September 2004
             October 2004
             November 2004
             February 2005
             May 2005
             June 2005
             August 2005
             September 2005
             February 2006
             March 2006
             May 2006
             June 2006
             July 2006
             August 2006
             September 2006
             November 2006
             December 2006
             January 2007
             February 2007
             March 2007
             April 2007
             May 2007
             June 2007
             July 2007
             August 2007
             September 2007
             October 2007
             November 2007
             December 2007

                  3.4.2 Adjustment of Advance Payment Base Prices - Long-Lead
Aircraft. For Aircraft scheduled for delivery 36 months or more after the date
of this Agreement, the Advance Payment Base Prices appearing in Article 3.4.1
will be used to determine the amount of the first advance payment to be made by
Buyer on the Aircraft. No later than 25 months before the scheduled month of
delivery of each affected Aircraft, Boeing will increase or decrease the Advance
Payment Base Price of such Aircraft as required to reflect the effects of (i)
any adjustments in the Aircraft Basic Price pursuant to this Agreement and (ii)
the then-current forecasted escalation factors used by Boeing. Boeing will
provide the adjusted Advance Payment Base Prices

                                     15-5

P.A. No. 1810
K/SWA
<PAGE>

for each affected Aircraft to Buyer, and the advance payment schedule will be
considered amended to substitute such adjusted Advance Payment Base Prices.

                                      15-6

P.A. No. 1810
K/SWA
<PAGE>

                          Supplemental Agreement No. 16

                                       to

                           Purchase Agreement No. 1810

                                     between

                               THE BOEING COMPANY

                                       and

                             SOUTHWEST AIRLINES CO.

                    Relating to Boeing Model 737-7H4 Aircraft

         THIS SUPPLEMENTAL AGREEMENT, entered into as of APRIL 30, 2001, by and
between THE BOEING COMPANY, a Delaware corporation with its principal offices in
Seattle, Washington, (Boeing) and SOUTHWEST AIRLINES CO., a Texas corporation
with its principal offices in Dallas, Texas (Buyer);

         WHEREAS, the parties hereto entered into Purchase Agreement No. 1810
dated January 19, 1994, relating to Boeing Model 737-7H4 aircraft (the
Agreement) and;

         WHEREAS, Buyer has agreed to accelerate one (1) Block E Aircraft from
July 2001 to June 2001.

         NOW THEREFORE, in consideration of the mutual covenants herein
contained, the parties agree to amend the Agreement as follows:

1. The Table of Contents of the Agreement is deleted in its entirety and a new
Table of Contents is attached hereto and incorporated into the Agreement by this
reference.

*** PURSUANT TO 17 CFR 240.24b-2, CONFIDENTIAL INFORMATION HAS BEEN OMITTED AND
HAS BEEN FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT
TO A CONFIDENTIAL TREATMENT APPLICATION FILED WITH THE COMMISSION.

                                    SA-16-1

P.A. No. 1810
K/SWA

<PAGE>

2. Article 2, entitled "Delivery, Title and Risk of Loss," paragraph 2.1,
entitled "Time of Delivery," is deleted in its entirety and replaced by a new
paragraph 2.1 revised to delete the one (1) of Block E Aircraft delivering in
July 2001 and change the quantity of Block E Aircraft delivering in June 2001
from two (2) to three (3). Such new pages 2-1, 2-2, 2-3 and 2-4 are attached
hereto and incorporated into the Agreement by this reference.

3. Article 3, entitled "Price of Aircraft", paragraph 3.4 entitled "Advance
Payment Base Price," subparagraph 3.4.1 entitled "Advance Payment Base Price" is
deleted in its entirety and replaced by a new subparagraph 3.4.1 revised to
delete the Advance Payment Base Price for the month of July 2001 Block E
Aircraft. Such new pages 3-1, 3-2, 3-3, 3-4, 3-5 and 3-6 are attached hereto and
incorporated into the Agreement by this reference.

4. As a result of this Supplemental Agreement, Boeing will refund to Buyer the
amount ***. Such amount reflects the difference in advance payments due as a
result of the acceleration of the one (1) Block E Aircraft from July 2001 to
June 2001. The refund will be effected by Buyer (i) reducing advance payments in
the amount of *** due May 1, 2001 by ***, resulting in a total payment due May
1, 2001 of ***, and (ii) reducing advance payments in the amount of *** due June
1, 2001 by ***, resulting in a total payment due June 1, 2001 of. ***

The Agreement will be deemed to be supplemented to the extent herein provided
and as so supplemented will continue in full force and effect.

EXECUTED IN DUPLICATE as of the day and year first above written.

THE BOEING COMPANY                     SOUTHWEST AIRLINES CO.

By: MICHAEL S. ANDERSON                By: LAURA WRIGHT
    -------------------------             --------------------------

Its: Attorney-In-Fact                  Its: Treasurer
    -------------------------              -------------------------

                                    SA-16-2

P.A. No. 1810
K/SWA

<PAGE>

                               PURCHASE AGREEMENT

                                     between

                               THE BOEING COMPANY

                                       and

                             SOUTHWEST AIRLINES CO.

                    Relating to Boeing Model 737-7H4 Aircraft

                         Purchase Agreement Number 1810

P.A. No. 1810
K/SWA

<PAGE>

                                TABLE OF CONTENTS

<Table>
<Caption>
                                                                                       Page             SA
                                                                                     Number         Number
                                                                                     ------         ------
ARTICLES
--------
<S>                                                                                  <C>            <C>
1.                       Subject Matter of Sale..........................................1-1         SA-13

2.                       Delivery, Title and Risk
                         of Loss.........................................................2-1         SA-16

3.                       Price of Aircraft...............................................3-1         SA-16

4.                       Taxes...........................................................4-1

5.                       Payment.........................................................5-1

6.                       Excusable Delay.................................................6-1

7.                       Changes to the Detail
                         Specification...................................................7-1          SA-1

8.                       Federal Aviation Requirements and
                         Certificates and Export License.................................8-1

9.                       Representatives, Inspection,
                         Flights and Test Data...........................................9-1

10.                      Assignment, Resale or Lease....................................10-1

11.                      Termination for Certain Events.................................11-1

12.                      Product Assurance; Disclaimer and
                         Release; Exclusion of Liabilities;
                         Customer Support; Indemnification
                         and Insurance..................................................12-1

13.                      Buyer Furnished Equipment and
                         Spare Parts....................................................13-1

14.                      Contractual Notices and Requests...............................14-1

15.                      Miscellaneous..................................................15-1
</Table>

                                        i

P.A. No. 1810
K/SWA                                                                      SA-16

<PAGE>

                                TABLE OF CONTENTS

<Table>
<Caption>
                                                                                                        SA
                                                                                                    Number
                                                                                                    ------
EXHIBITS
--------
<S>                      <C>                                                                        <C>
A                        Aircraft Configuration                                                      SA-13

B                        Product Assurance Document                                                   SA-1

C                        Customer Support Document

D                        Price Adjustments Due to
                         Economic Fluctuations - Aircraft                                            SA-13

E                        Buyer Furnished Equipment
                         Provisions Document

F                        Defined Terms Document
</Table>

LETTER AGREEMENTS
-----------------

<Table>
<S>                      <C>
1810-1                   Waiver of Aircraft Demonstration Flight
</Table>

                                       ii

P.A. No. 1810
K/SWA                                                                      SA-16

<PAGE>

                                TABLE OF CONTENTS

<Table>
<Caption>
                                                                                                 SA
                                                                                             Number
                                                                                             ------
RESTRICTED LETTER AGREEMENTS
----------------------------
<S>                            <C>                                                           <C>
6-1162-RLL-932R2               Promotional Support                                           SA-13

6-1162-RLL-933R9               Option Aircraft                                               SA-13

6-1162-RLL-934R3               Disclosure of Confidential                                    SA-14
                               Information

6-1162-RLL-935R1               Performance Guarantees                                        SA-1

6-1162-RLL-936R4               Certain Contractual Matters                                   SA-4

6-1162-RLL-937                 Alternate Advance Payment Schedule

6-1162-RLL-938                 ***

6-1162-RLL-939R1               Certification Flight Test Aircraft                            SA-1

6-1162-RLL-940R1               Training Matters                                              SA-1

6-1162-RLL-941R2               Other Matters                                                 SA-13

6-1162-RLL-942                 Open Configuration Matters

6-1162-RLL-943R1               Substitution Rights                                           SA-6

6-1162-RLL-944                 Airframe Maintenance Material Cost
                               Protection Program

6-1162-RLL-945                 Comparison of 737-7H4 and 737-3H4
                               Block Fuel Burn

6-1162-RLL-1855R3              Additional Contractual Matters                                SA-4

6-1162-RLL-1856                ***                                                           SA-1

6-1162-RLL-1857                Service Ready Validation Program                              SA-1
                               Field Test

6-1162-RLL-1858R1              Escalation Matters                                            SA-4
</Table>

                                       iii

P.A. No. 1810
K/SWA                                                                      SA-16

<PAGE>

                             TABLE OF CONTENTS CON'T

<Table>
<Caption>
                                                                                                 SA
                                                                                             Number
                                                                                             ------
RESTRICTED LETTER AGREEMENTS
----------------------------
<S>                            <C>                                                           <C>
6-1162-RLL-2036                Amortization of Costs for
                               Customer Unique Changes                                       SA-1

6-1162-RLL-2037                Reconciliation of the Aircraft                                SA-1
                               Basic Price

6-1162-RLL-2073                Maintenance Training Matters                                  SA-1

6-1162-KJJ-054                 Business Matters                                              SA-13

6-1162-KJJ-055                 Structural Matters                                            SA-13

6-1162-KJJ-056                 Noise and Emission Matters                                    SA-13

6-1162-KJJ-057                 Product Development Matters                                   SA-13

6-1162-KJJ-058                 Additional Substitution Rights                                SA-13

6-1162-KJJ-150                 Flight Control Computer & Mode                                SA-14
                               Control Panel Spares Matter
</Table>

                                       iv

P.A. No. 1810
K/SWA                                                                      SA-16

<PAGE>

                           PURCHASE AGREEMENT NO. 1810

                                   Relating to

                          BOEING MODEL 737-7H4 AIRCRAFT

                                   ----------

         This Agreement is entered into as of January 19th 1994, by and between
The Boeing Company, a Delaware corporation, with its principal office in
Seattle, Washington (Boeing), and Southwest Airlines Co., a Texas corporation,
with its principal office in the City of Dallas, State of Texas (Buyer).

Accordingly, Boeing and Buyer agree as follows:

                                        1

P.A. No. 1810
K/SWA

<PAGE>

ARTICLE 1. Subject Matter of Sale.

         1.1 The Aircraft. Subject to the terms and conditions of this
Agreement, Boeing will manufacture and deliver to Buyer and Buyer will purchase
and accept delivery from Boeing of one hundred forty-two (142) Boeing Model
737-7H4 aircraft (the Aircraft) manufactured in accordance with Boeing Detail
Specification D6-38808-1, dated October 30, 1996, as described in Exhibit A, and
ninety-four (94) Boeing Model 737-7H4 (the Aircraft) manufactured in accordance
with Boeing Detail Specification D6-38808-1, Revision A, dated February 24, 1998
as described in Exhibit A-1, as modified from time to time in accordance with
this Agreement (Detail Specification).

         1.2 Additional Goods and Services. In connection with the sale of the
Aircraft, Boeing will also provide to Buyer certain other things under this
Agreement, including data, documents, training and services, all as described in
this Agreement.

         1.3 Performance Guarantees. Any performance guarantees applicable to
the Aircraft will be expressly included in this Agreement. Where performance
guarantees are included in this Agreement other than within the Detail
Specification, such guarantees will be treated as being incorporated in the
Detail Specification by this reference.

         1.4 Defined Terms. For ease of use, certain terms are treated as
defined terms in this Agreement. Such terms are identified with a capital letter
and set forth and/or defined in Exhibit F.

                                       1-1

P.A. No. 1810
K/SWA                                                                      SA-13

<PAGE>

ARTICLE 2. Delivery, Title and Risk of Loss.

         2.1 Time of Delivery. The Aircraft will be delivered to Buyer by
Boeing, assembled and ready for flight and Buyer will accept delivery of the
Aircraft, in accordance with the following schedule:

<Table>
<Caption>
             Month and Year
               of Delivery                           Quantity of Aircraft
               -----------                           --------------------
<S>                                                  <C>
                                Block A Aircraft

             October 1997                                     Two (2)
             November 1997                                    Two (2)

                                Block B Aircraft

             January 1998                                     Two (2)
             February 1998                                    Three (3)
             March 1998                                       Two (2)
             April 1998                                       Two (2)
             May 1998                                         Two (2)
             June 1998                                        One (1)
             July 1998                                        Two (2)
             September 1998                                   Two (2)

                                Block C Aircraft

             February 1999                                    Four (4)
             May 1999                                         Four (4)
             July 1999                                        Four (4)
             August 1999                                      One (1)
             September 1999                                   Three (3)

                                Block D Aircraft

             November 1999                                    Two (2)
             December 1999                                    One (1)
             January 2000                                     One (1)
             March 2000                                       Four (4)
             July 2000                                        Four (4)
             August 2000                                      Three (3)

                                Block E Aircraft

             December 2000                                    Two (2)
             January 2001                                     One (1)
             February 2001                                    One (1)
             March 2001                                       Two (2)
             June 2001                                        Three (3)
             September 2001                                   Three (3)
</Table>

                                       2-1

P.A. No. 1810
K/SWA                                                                      SA-16

<PAGE>

<Table>
<S>                                                  <C>
                                Block F Aircraft

             October 1998                                     One (1)
             November 1998                                    Two (2)
             December 1998                                    Two (2)

                                Block G Aircraft

             March 1999                                       Two (2)

                                Block H Aircraft

             June 1999                                        Two (2)
             July 1999                                        One (1)
             August 1999                                      One (1)
             September 1999                                   Two (2)
             October 1999                                     One (1)
             March 2000                                       One (1)
             April 2000                                       Two (2)
             September 2000                                   One (1)
             October 2000                                     Two (2)
             March 2001                                       Two (2)
             April 2001                                       One (1)
             October 2001                                     Three (3)

                                Block I Aircraft

             November 2001                                    Two (2)
             December 2001                                    One (1)
             January 2002                                     One (1)
             March 2002                                       Four (4)
             April 2002                                       Two (2)
             July 2002                                        Four (4)
             October 2002                                     Four (4)

                                Block J Aircraft

             January 2003                                     Four (4)
             March 2003                                       One (1)

                                Block K Aircraft

             April 2004                                       Two (2)
             July 2004                                        Three (3)

                                Block L Aircraft

             October 1999                                     One (1)
             November 1999                                    Two (2)
             December 1999                                    One (1)
             June 2000                                        Three (3)
             July 2000                                        Three (3)
             September 2000                                   One (1)
             October 2000                                     One (1)
</Table>

                                       2-2

P.A. No. 1810
K/SWA                                                                      SA-16

<PAGE>

<Table>
<S>                                                           <C>
             November 2000                                    Four (4)
             December 2000                                    One(1)
             January 2001                                     One (1)
             February 2001                                    One (1)
             July 2001                                        One (1)
             September 2001                                   One (1)
             October 2001                                     One (1)
             September 2002                                   Three (3)

                                Block T Aircraft

             November 2001                                    One (1)
             February 2002                                    One (1)
             May 2002                                         One (1)
             June 2002                                        Two (2)
             July 2002                                        One (1)
             August 2002                                      Two (2)
             November 2002                                    Two (2)
             February 2003                                    One (1)
             May 2003                                         Two (2)
             June 2003                                        Two (2)
             August 2003                                      Three (3)
             February 2004                                    Three (3)
             March 2004                                       Three (3)
             April 2004                                       One (1)
             May 2004                                         Four (4)
             June 2004                                        Three (3)
             July 2004                                        Two (2)
             August 2004                                      Two (2)
             September 2004                                   Two (2)
             October 2004                                     Two (2)
             November 2004                                    Two (2)
             February 2005                                    One (1)
             May 2005                                         One (1)
             June 2005                                        One (1)
             August 2005                                      One (1)
             September 2005                                   One (1)
             February 2006                                    Three (3)
             March 2006                                       One (1)
             May 2006                                         Three (3)
             June 2006                                        Four (4)
             July 2006                                        One (1)
             August 2006                                      Three (3)
             September 2006                                   Three (3)
             November 2006                                    Two (2)
             December 2006                                    Two (2)
             January 2007                                     Two (2)
             February 2007                                    Three (3)
             March 2007                                       Two (2)
             April 2007                                       Two (2)
             May 2007                                         Two (2)
             June 2007                                        Two (2)
             July 2007                                        Two (2)
</Table>

                                       2-3

P.A. No. 1810
K/SWA                                                                      SA-16

<PAGE>

<Table>
<S>                                                           <C>
             August 2007                                      Two (2)
             September 2007                                   Two (2)
             October 2007                                     Two (2)
             November 2007                                    Two (2)
             December 2007                                    Two (2)
</Table>

         2.2 Notice of Target Delivery Date. Boeing will give Buyer notice of
the Target Delivery Date of the Aircraft approximately 30 days prior to the
scheduled month of delivery.

         2.3 Notice of Delivery Date. If Boeing gives Buyer at least 7 days'
notice of the delivery date of the Aircraft, and an Aircraft delivery is delayed
beyond such delivery date due to the responsibility of Buyer, Buyer will
reimburse Boeing for all costs incurred by Boeing as a result of such delay,
including amounts for storage, insurance, Taxes, preservation or protection of
the Aircraft and interest on payments due.

         2.4 Place of Delivery. The Aircraft will be delivered at an airport
facility selected by Boeing in the State of Washington, unless mutually agreed
otherwise.

         2.5 Title and Risk of Loss. Title to and risk of loss of an Aircraft
will pass from Boeing to Buyer upon delivery of such Aircraft, but not prior
thereto.

         2.6 Bill of Sale. Upon delivery of an Aircraft Boeing will deliver to
Buyer a bill of sale conveying good title to such Aircraft, free of all liens,
claims, charges and encumbrances of every kind whatsoever, and such other
appropriate documents of title as Buyer may reasonably request.

                                       2-4

P.A. No. 1810
K/SWA                                                                      SA-16

<PAGE>

ARTICLE 3. Price of Aircraft.

         3.1 Definitions.

                  3.1.1 Special Features are the features incorporated in
Exhibit A which have been selected by Buyer.

                  3.1.2 Base Aircraft Price is the Aircraft Basic Price
excluding the price of Special Features.

                  3.1.3 Aircraft Basic Price is comprised of the Base Aircraft
Price and the price of the Special Features.

                  3.1.4 Economic Price Adjustment is the adjustment to the
Aircraft Basic Price (Base Aircraft and Special Features) as calculated pursuant
to Exhibit D or Exhibit D-1 as applicable.

                  3.1.5 Aircraft Price is the total amount Buyer is to pay for
the Aircraft at the time of delivery.

         3.2 Aircraft Basic Price.

                  The Aircraft Basic Price for Block A through L Aircraft, is
expressed in July 1992 dollars; the Aircraft Basic Price for Block T Aircraft,
is expressed in July 1999 dollars; as set forth below:

<Table>
<Caption>
                                 Base                            Special                            Aircraft
                                 Aircraft Price                  Features                           Basic Price
<S>                              <C>                             <C>                                <C>
Block A, B, C,
D & E Aircraft                   ***                             ***                                ***
Block F & G
Aircraft                         ***                             ***                                ***
Block H
Aircraft                         ***                             ***                                ***
Block I
Aircraft                         ***                             ***                                ***
Block J
Aircraft                         ***                             ***                                ***
Block K
Aircraft                         ***                             ***                                ***
Block L
Aircraft                         ***                             ***                                ***

Block T
Aircraft                         ***                             ***                                ***
</Table>

                                      15-1

P.A. No. 1810
K/SWA

<PAGE>

         3.3 Aircraft Price. The Aircraft Price will be established at the time
of delivery of such Aircraft to Buyer and will be the sum of:

                  3.3.1 the Aircraft Basic Price, which is *** for the Block A,
B, C, D and E Aircraft, *** for the Block F and G Aircraft, *** for the Block H
Aircraft, *** for the Block I Aircraft, *** for the Block J Aircraft, *** for
the Block K Aircraft and *** for the Block L Aircraft; *** for the Block T
Aircraft; plus

                  3.3.2 the Economic Price Adjustments for the Aircraft Basic
Price, as calculated pursuant to the formulas set forth in Exhibit D (Price
Adjustments Due to Economic Fluctuations - Aircraft) for Aircraft Block A
through L, and in Exhibit D-1 (Price Adjustments Due to Economic Fluctuations -
Aircraft) for Aircraft Block T; plus

                  3.3.3 other price adjustments made pursuant to this Agreement
or other written agreements executed by Boeing and Buyer.

         3.4 Advance Payment Base Price.

                  3.4.1 Advance Payment Base Price. For advance payment
purposes, the following estimated delivery prices of the Aircraft (Advance
Payment Base Price) have been established, using currently available forecasts
of the escalation factors used by Boeing as of the date of signing this
Agreement. The Advance Payment Base Price of each Aircraft is set forth below:

<Table>
<Caption>
             Month and Year of                                Advance Payment Base
             Scheduled Delivery                               Price per Aircraft
             ------------------                               --------------------
<S>                                                           <C>
                               Block A Aircraft***

             October 1997
             November 1997

                               Block B Aircraft***

             January 1998
             February 1998
             March 1998
             April 1998
             May 1998
             June 1998
             July 1998
             September 1998
</Table>

                                      15-2

P.A. No. 1810
K/SWA
<PAGE>

<Table>
<S>                                                           <C>
                               Block C Aircraft***

             February 1999
             May 1999
             July 1999
             August 1999
             September 1999

                               Block D Aircraft***

             November 1999
             December 1999
             January 2000
             March 2000
             July 2000
             August 2000

                               Block E Aircraft***

             December 2000
             January 2001
             February 2001
             March 2001
             June 2001
             September 2001

                               Block F Aircraft***

             October 1998
             November 1998
             December 1998

                               Block G Aircraft***

             March 1999

                               Block H Aircraft***

             June 1999
             July 1999
             August 1999
             September 1999
             October 1999
             March 2000
             April 2000
             September 2000
             October 2000
             March 2001
             April 2001
             October 2001
</Table>

                                      15-3

P.A. No. 1810
K/SWA

<PAGE>

<Table>
<S>                                                           <C>
                               Block I Aircraft***

             November 2001
             December 2001
             January 2002
             March 2002
             April 2002
             July 2002
             October 2002

                               Block J Aircraft***

             January 2003
             March 2003

                               Block K Aircraft***

             April 2004
             July 2004

                               Block L Aircraft***

             October 1999
             November 1999
             December 1999
             June 2000
             July 2000
             September 2000
             October 2000
             November 2000
             December 2000
             January 2001
             February 2001
             July 2001
             September 2001
             October 2001
             September 2002

                               Block T Aircraft***

             November 2001
             February 2002
             May 2002
             June 2002
             July 2002
             August 2002
             November 2002
             February 2003
             May 2003
             June 2003
</Table>

                                      15-4

P.A. No. 1810
K/SWA

<PAGE>

<Table>
<S>                                                           <C>
             August 2003
             February 2004
             March 2004
             April 2004
             May 2004
             June 2004
             July 2004
             August 2004
             September 2004
             October 2004
             November 2004
             February 2005
             May 2005
             June 2005
             August 2005
             September 2005
             February 2006
             March 2006
             May 2006
             June 2006
             July 2006
             August 2006
             September 2006
             November 2006
             December 2006
             January 2007
             February 2007
             March 2007
             April 2007
             May 2007
             June 2007
             July 2007
             August 2007
             September 2007
             October 2007
             November 2007
             December 2007
</Table>

                  3.4.2 Adjustment of Advance Payment Base Prices - Long-Lead
Aircraft. For Aircraft scheduled for delivery 36 months or more after the date
of this Agreement, the Advance Payment Base Prices appearing in Article 3.4.1
will be used to determine the amount of the first advance payment to be made by
Buyer on the Aircraft. No later than 25 months before the scheduled month of
delivery of each affected Aircraft, Boeing will increase or decrease the Advance
Payment Base Price of such Aircraft as required to reflect the effects of (i)
any adjustments in the Aircraft Basic Price pursuant to this Agreement and (ii)
the then-current forecasted escalation factors used by Boeing. Boeing will
provide the adjusted Advance Payment Base Prices for each affected Aircraft to
Buyer, and the advance payment schedule will be considered amended to substitute
such adjusted Advance Payment Base Prices.

                                      15-5

P.A. No. 1810
K/SWA

<PAGE>

                          Supplemental Agreement No. 17

                                       to

                           Purchase Agreement No. 1810

                                     between

                               THE BOEING COMPANY

                                       and

                             SOUTHWEST AIRLINES CO.

                    Relating to Boeing Model 737-7H4 Aircraft

         THIS SUPPLEMENTAL AGREEMENT, entered into as of AUGUST 21, 2001, by and
between THE BOEING COMPANY, a Delaware corporation with its principal offices in
Seattle, Washington, (Boeing) and SOUTHWEST AIRLINES CO., a Texas corporation
with its principal offices in Dallas, Texas (Buyer);

         WHEREAS, the parties hereto entered into Purchase Agreement No. 1810
dated January 19, 1994, relating to Boeing Model 737-7H4 aircraft (the
Agreement) and;

         WHEREAS, Buyer has agreed to delete three (3) Block P Option Aircraft
from October 2006, and add three (3) Block N Option Aircraft one (1) February
2004, one (1) May 2004 and one (1) June 2004.

         NOW THEREFORE, in consideration of the mutual covenants herein
contained, the parties agree to amend the Agreement as follows:

1. The Table of Contents of the Agreement is deleted in its entirety and a new
Table of Contents is attached hereto and incorporated into the Agreement by this
reference.

*** PURSUANT TO 17 CFR 240.24b-2, CONFIDENTIAL INFORMATION HAS BEEN OMITTED AND
HAS BEEN FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT
TO A CONFIDENTIAL TREATMENT APPLICATION FILED WITH THE COMMISSION.

                                     SA-17-1

P.A. No. 1810
K/SWA

<PAGE>

2. Letter Agreement No. 6-1162-RLL-933R9 entitled "Option Aircraft," is deleted
in its entirety and replaced by a new Letter Agreement No. 6-1162-RLL-933R10
which is attached hereto and is incorporated into the Agreement by this
reference.

The Agreement will be deemed to be supplemented to the extent herein provided
and as so supplemented will continue in full force and effect.

EXECUTED IN DUPLICATE as of the day and year first above written.

THE BOEING COMPANY                  SOUTHWEST AIRLINES CO.

By:  /s/ MICHAEL S. ANDERSON        By: /s/ LAURA WRIGHT
    --------------------------         --------------------------

Its:    Attorney-In-Fact            Its: V.P. Finance & Treasurer
     -------------------------           ------------------------

                                     SA-17-2

P.A. No. 1810
K/SWA

<PAGE>

                                TABLE OF CONTENTS

<Table>
<Caption>
                                                                                       Page             SA
                                                                                     Number         Number
                                                                                     ------         ------
ARTICLES
--------
<S>                                                                                  <C>            <C>

1.                       Subject Matter of Sale..........................................1-1         SA-13

2.                       Delivery, Title and Risk
                         of Loss.........................................................2-1         SA-16

3.                       Price of Aircraft...............................................3-1         SA-16

4.                       Taxes...........................................................4-1

5.                       Payment.........................................................5-1

6.                       Excusable Delay.................................................6-1

7.                       Changes to the Detail
                         Specification...................................................7-1          SA-1

8.                       Federal Aviation Requirements and
                         Certificates and Export License.................................8-1

9.                       Representatives, Inspection,
                         Flights and Test Data...........................................9-1

10.                      Assignment, Resale or Lease....................................10-1

11.                      Termination for Certain Events.................................11-1

12.                      Product Assurance; Disclaimer and
                         Release; Exclusion of Liabilities;
                         Customer Support; Indemnification
                         and Insurance..................................................12-1

13.                      Buyer Furnished Equipment and
                         Spare Parts....................................................13-1

14.                      Contractual Notices and Requests...............................14-1

15.                      Miscellaneous..................................................15-1
</Table>

                                       i

P.A. No. 1810                                                              SA-17
K/SWA

<PAGE>

TABLE OF CONTENTS

<Table>
<Caption>
                                                                                                   SA
                                                                                               Number
                                                                                               ------

EXHIBITS
--------

<S>                      <C>                                                                   <C>
A                        Aircraft Configuration                                                  SA-13

B                        Product Assurance Document                                              SA-1

C                        Customer Support Document

D                        Price Adjustments Due to
                         Economic Fluctuations - Aircraft                                        SA-13

E                        Buyer Furnished Equipment
                         Provisions Document

F                        Defined Terms Document
</Table>

<Table>
<Caption>
LETTER AGREEMENTS
-----------------

<S>                      <C>
1810-1                   Waiver of Aircraft Demonstration Flight
</Table>

                                       ii

P.A. No. 1810                                                              SA-17
K/SWA

<PAGE>

                                TABLE OF CONTENTS

<Table>
<Caption>
                                                                                                 SA
                                                                                             Number
                                                                                             ------
RESTRICTED LETTER AGREEMENTS
----------------------------
<S>                           <C>                                                        <C>

6-1162-RLL-932R2               Promotional Support                                           SA-13

6-1162-RLL-933R10              Option Aircraft                                               SA-17

6-1162-RLL-934R3               Disclosure of Confidential                                    SA-14
                               Information

6-1162-RLL-935R1               Performance Guarantees                                        SA-1

6-1162-RLL-936R4               Certain Contractual Matters                                   SA-4

6-1162-RLL-937                 Alternate Advance Payment Schedule

6-1162-RLL-938                 ***

6-1162-RLL-939R1               Certification Flight Test Aircraft                            SA-1

6-1162-RLL-940R1               Training Matters                                              SA-1

6-1162-RLL-941R2               Other Matters                                                 SA-13

6-1162-RLL-942                 Open Configuration Matters

6-1162-RLL-943R1               Substitution Rights                                           SA-6

6-1162-RLL-944                 Airframe Maintenance Material Cost
                               Protection Program

6-1162-RLL-945                 Comparison of 737-7H4 and 737-3H4
                               Block Fuel Burn

6-1162-RLL-1855R3              Additional Contractual Matters                                SA-4

6-1162-RLL-1856                ***                                                           SA-1

6-1162-RLL-1857                Service Ready Validation Program                              SA-1
                               Field Test

6-1162-RLL-1858R1              Escalation Matters                                            SA-4
</Table>

                                       iii

P.A. No. 1810                                                              SA-17
K/SWA

<PAGE>

                             TABLE OF CONTENTS CON'T

<Table>
<Caption>
                                                                                                 SA
                                                                                             Number
                                                                                             ------
RESTRICTED LETTER AGREEMENTS
----------------------------

<S>                            <C>                                                        <C>
6-1162-RLL-2036                Amortization of Costs for
                               Customer Unique Changes                                       SA-1

6-1162-RLL-2037                Reconciliation of the Aircraft                                SA-1
                               Basic Price

6-1162-RLL-2073                Maintenance Training Matters                                  SA-1

6-1162-KJJ-054                 Business Matters                                              SA-13

6-1162-KJJ-055                 Structural Matters                                            SA-13

6-1162-KJJ-056                 Noise and Emission Matters                                    SA-13

6-1162-KJJ-057                 Product Development Matters                                   SA-13

6-1162-KJJ-058                 Additional Substitution Rights                                SA-13

6-1162-KJJ-150                 Flight Control Computer & Mode                                SA-14
                               Control Panel Spares Matter
</Table>

                                       iv

P.A. No. 1810                                                              SA-17
K/SWA

<PAGE>

Southwest Airlines Co.
6-1162-RLL-933R10 Page 1

6-1162-RLL-933R10

Southwest Airlines Co.
P.O. Box 36611 - Love Field
Dallas, Texas 75235

Subject:          Letter Agreement No. 6-1162-RLL-933R10 to Purchase Agreement
                  No. 1810 - Option Aircraft

This Letter Agreement amends Purchase Agreement No. 1810 dated as of January 19,
1994 (the Agreement) between The Boeing Company (Boeing) and Southwest Airlines
Co. (Buyer) relating to Model 737-7H4 aircraft (Aircraft).

All terms used and not defined herein will have the same meaning as in the
Agreement.

In consideration of the purchase by Buyer of the Aircraft, Boeing hereby agrees
to manufacture and sell to Buyer and Buyer shall have the option to purchase
(Option or Options) eighty-seven (87) additional Model 737-7H4 aircraft as
described in paragraph 1 of Attachment A hereto (Option Aircraft) and two
hundred seventeen (217) Model 737-7H4 Rollover Option Aircraft (Rollover Option
Aircraft), subject to the terms and conditions set forth below.

1.       Delivery of Option Aircraft.

         The Option Aircraft will be delivered to Buyer during or before the
months set forth in the following schedule:

<Table>
<Caption>
                                                     Number of                Option
             Month and Year                          Option                   Aircraft
             of Delivery                             Aircraft                 Block
             --------------                          ---------                --------
<S>                                                 <C>                       <C>

             March 2003                              Three  (3)                    M
             April 2003                              Two   (2)                     M
             July 2003                               Four  (4)                     M
             October 2003                            Four  (4)                     M

             January 2004                            Four (4)                      N
             February 2004                           One (1)                       N
             March 2004                              One (1)                       N
             April 2004                              One (1)                       N
             May 2004                                One (1)                       N
             June 2004                               One (1)                       N
             August 2004                             Two   (2)                     N
             September 2004                          Three (3)                     N
             October 2004                            Two   (2)                     N
</Table>

P.A. No. 1810
K/SWA                                                                      SA-17

<PAGE>

Southwest Airlines Co.
6-1162-RLL-933R10   Page 2

<Table>
<Caption>
                                                     Number of                Option
             Month and Year                          Option                   Aircraft
             of Delivery                             Aircraft                 Block
             --------------                          ---------                --------
<S>                                                 <C>                       <C>

             January 2005                            Four (4)                    O
             March 2005                              Four (4)                    O
             April 2005                              Two (2)                     O
             July 2005                               Four (4)                    O
             October 2005                            Four (4)                    O

             January 2006                            Four (4)                    P
             March 2006                              Four (4)                    P
             April 2006                              Two (2)                     P
             July 2006                               Four (4)                    P
             October 2006                            One (1)                     P

             January 2008                            Two (2)                     U
             February 2008                           Three (3)                   U
             March 2008                              Two (2)                     U
             April 2008                              Two (2)                     U
             May 2008                                Two (2)                     U
             June 2008                               Two (2)                     U
             July 2008                               Two (2)                     U
             August 2008                             Two (2)                     U
             September 2008                          Two (2)                     U
             October 2008                            Two (2)                     U
             November 2008                           Two (2)                     U
             December 2008                           Two (2)                     U
</Table>

2.       Delivery of Rollover Option Aircraft.

         2.1 The Rollover Option Aircraft will be delivered to Buyer during or
before the years set forth in the following schedule:

<Table>
<Caption>
                                                                              Option
             Year of                   Number of                              Aircraft
             Delivery                  Option Aircraft                        Block
             --------                  ---------------                        --------
<S>                                    <C>                                 <C>

             2007                      Twenty (20)                                 Q
             2008                      Twenty (20)                                 R
             2009                      Six (6)                                     S
             2009-2012                 One hundred seventy one                     V
                                       (171)
</Table>

P.A. No. 1810
K/SWA                                                                      SA-17

<PAGE>

Southwest Airlines Co.
6-1162-RLL-933R10   Page 3

         2.2 The two hundred seventeen (217) Rollover Option Aircraft may be
converted into Option Aircraft or firm Aircraft, from time to time, in any of
the following ways:

                  2.2.1 Buyer can exercise any Option for an Option Aircraft
described in Article 1 above, and will be offered the right to convert one
Rollover Option Aircraft into an Option Aircraft for each Option exercised.

                  2.2.2 If Buyer elects not to exercise an Option, Buyer may
convert one Rollover Option Aircraft to an Option Aircraft; otherwise, one
Rollover Option Aircraft will be deleted for each Option not exercised by Buyer.

                  2.2.3 Buyer may convert Rollover Option Aircraft directly to
firm Aircraft. When Buyer converts one or more Rollover Option Aircraft to firm
Aircraft, Buyer will be offered the right to convert one Rollover Option
Aircraft into an Option Aircraft for each converted Rollover Option Aircraft.

         2.3 Buyer may not convert Rollover Option Aircraft to Option Aircraft
except in accordance with Article 2.2 above.

         2.4 Base Price Adjustments for Rollover Option Aircraft which are
converted to Option Aircraft or firm Aircraft shall be in accordance with
Article 2.2.5 of Attachment A to this Letter Agreement.

         2.5 The delivery month offered by Boeing to Buyer for any Option or
firm Aircraft resulting from a conversion of a Rollover Option Aircraft will be
at least 24 months from the corresponding Option exercise date or firm order.

         2.6 Upon conversion of a Rollover Option Aircraft into an Option
Aircraft, Buyer shall wire transfer the Deposit of *** to Boeing and Boeing and
Buyer shall agree on a delivery position for that aircraft. Section 1 of this
Letter Agreement will be amended accordingly. In the event Buyer thereafter
exercises its right to purchase such Option Aircraft, application of the Deposit
will be in accordance with Article 4.1 herein. If the conversion is a Rollover
Option Aircraft to a firm Aircraft, Buyer shall wire transfer any advance
payments due under the Agreement.

         2.7 Buyer and Boeing will consult on a frequent basis to keep each
other informed as to

P.A. No. 1810
K/SWA                                                                      SA-17

<PAGE>

Southwest Airlines Co.
6-1162-RLL-933R10   Page 4

Buyer's fleet plans and Boeing's production plans in order to accommodate to the
greatest extent reasonably possible each party's needs in managing the delivery
schedule for the Rollover Option Aircraft. Boeing acknowledges Buyer's need for
delivery positions in the 2007-2012 time frame, as well as the possibility of a
need for delivery positions in earlier years and will use its best reasonable
efforts to meet Buyer's needs.

3.       Price.

         3.1 The advance payment base prices of the Option Aircraft set forth
below and in paragraph 2.1 of Attachment A represent the estimated delivery
prices of the Option Aircraft. The Option Aircraft pricing elements and
associated pricing terms and conditions are given in Attachment A.

         3.2 Price and escalation provisions for Model 737-7H4 aircraft
delivering after 2004 are not currently available. The estimated Advance Payment
Base Prices shown in paragraph 3.3 below and in paragraph 2.1 of Attachment A
are based on currently available price and escalation provisions. As price and
escalation provisions become available for Model 737-7H4 aircraft delivering
after 2004, such price and escalation provisions will be appropriately applied
to the applicable Option Aircraft.

For additional information relating to price and escalation provisions
applicable to Option Aircraft delivering after 2004 refer to paragraphs 2.2 and
3.2 of Attachment A.

         3.3 The Advance Payment Base Prices of the Option Aircraft indicated
below do include an amount for special features in addition to those
specifically described in Attachment A but do not include any amount for items
of Buyer Furnished Equipment (BFE). An estimate for typical special features is
*** per Aircraft (expressed in 1992 STE dollars) and for BFE is *** per Aircraft
(expressed in delivery year dollars).

<Table>
<Caption>
             Month and Year                                 Advance Payment Base
             of Delivery                                    Price per Option Aircraft
             --------------                                 -------------------------
<S>                                                        <C>

                                       Block M Aircraft***

             March 2003
             April 2003
             July 2003
             October 2003
</Table>

P.A. No. 1810
K/SWA                                                                      SA-17

<PAGE>

Southwest Airlines Co.
6-1162-RLL-933R10   Page 5

<Table>
<S>                                                        <C>
                                       Block N Aircraft***

             January 2004
             February 2004
             March 2004
             April 2004
             May 2004
             June 2004
             August 2004
             September 2004
             October 2004

                                       Block O Aircraft***

             January 2005
             March 2005
             April 2005
             July 2005
             October 2005

                                       Block P Aircraft***

             January 2006
             March 2006
             April 2006
             July 2006
             October 2006

                                       Block U Aircraft***

             January 2008
             February 2008
             March 2008
             April 2008
             May 2008
             June 2008
             July 2008
             August 2008
             September 2008
             October 2008
             November 2008
             December 2008
</Table>

         3.4 The Option Aircraft purchase price will be the applicable basic
price thereof at the time of Option Aircraft delivery adjusted in accordance
with Boeing's Aircraft escalation provisions contained in the definitive
agreement to purchase the Option Aircraft. The purchase price will include the
price for Seller Purchased Equipment (SPE) if Buyer has

P.A. No. 1810
K/SWA                                                                      SA-17

<PAGE>

Southwest Airlines Co.
6-1162-RLL-933R10   Page 6

elected to change Buyer Furnished Equipment (BFE) to SPE.

4.       Option Aircraft Payment.

         4.1 In consideration of the granting of the Options as set forth
herein, on or before the date Boeing and Buyer enter into a definitive agreement
to purchase the Aircraft, Buyer will pay a deposit to Boeing of *** for each
Option Aircraft (Deposit). In the event Buyer exercises its Options herein, the
amount of the Deposit will be credited against the first advance payment due for
such Option Aircraft pursuant to the advance payment schedule set forth in
paragraph 3 of Attachment A. The Deposits for the Option Aircraft will be
refunded to Buyer, without interest, if the parties do not enter into a
definitive Agreement for the Aircraft.

In the event that, after the parties enter into a definitive agreement to
purchase the Aircraft, Buyer does not exercise its Options to purchase the
Option Aircraft pursuant to the terms and conditions set forth herein, Boeing
will be entitled to retain the Deposits for the Option Aircraft except as
provided in paragraph 6 herein.

         4.2 Advance payments in the amount of 30% of the advance payment base
price will be payable on the Option Aircraft in accordance with paragraph 3 of
Attachment A. The remainder of the Option Aircraft purchase price is due at the
time of delivery of the Option Aircraft.

5.       Option Exercise.

         5.1 To exercise its Option, Buyer will give written or telegraphic
notice thereof to Boeing on or before sixteen (16) months prior to the first day
of the delivery month of each Option Aircraft.

In such notice Buyer will select the Option Model type, and the applicable
delivery positions.

         5.2 It is understood and agreed that Boeing may accelerate the Option
exercise dates specified above if Boeing must make production decisions which
are dependent on Buyer's decision to buy the Option Aircraft. If Boeing elects
to accelerate the Option exercise dates, Boeing will do so by giving written or
telegraphic notice thereof to Buyer. Such notice will specify the revised Option
exercise dates, which will not be earlier than 30 days after the date of

P.A. No. 1810
K/SWA                                                                      SA-17

<PAGE>

Southwest Airlines Co.
6-1162-RLL-933R10   Page 7

transmittal of such notice, and the Option Aircraft delivery positions affected
by such revision. If Buyer fails to exercise its Option for any Option Aircraft
affected by such revised dates, the Deposit applicable to such Option Aircraft
will be promptly refunded, with interest, to Buyer. The interest rate for
calculation of the interest associated with such refund is the rate of two
percent (2%) below the Citibank base rate in effect from time to time during the
period the Option deposit is held by Boeing.

6.       Contract Terms.

         It is understood that Boeing and Buyer will use their best efforts to
enter into a definitive agreement for the Option Aircraft within thirty (30)
days after Buyer exercises an Option to purchase Option Aircraft pursuant to
paragraph 5 covering the detailed terms and conditions for the sale of such
Option Aircraft.

Such definitive agreement will include the terms and conditions contained herein
together with the terms and conditions, not inconsistent herewith, contained in
Boeing's then-current standard form of purchase agreement for the sale of Model
737-700 aircraft in effect as of the date of Option exercise and such additional
terms and conditions as may be mutually agreed upon. In the event the parties
have not entered into such an agreement within the time period contemplated
herein, either party may, exercisable by written or telegraphic notice given to
the other within thirty (30) days after such period, terminate the purchase of
such Option Aircraft.

7.       Termination of Option to Purchase.

         Either Boeing or Buyer may terminate the Options to purchase an Option
Aircraft if any of the following events are not accomplished by the respective
dates contemplated in this letter agreement, or in the Agreement, as the case
may be:

         (i) termination of the purchase of the Aircraft under the Agreement for
any reason;

         (ii) payment by Buyer of the Deposit with respect to an Option Aircraft
pursuant to paragraph 4.1 herein;

         (iii) exercise of an Option to purchase an Option Aircraft pursuant to
the terms hereof.

Any termination of an Option to purchase by Boeing which is based on the
termination of the purchase of

P.A. No. 1810
K/SWA                                                                      SA-17

<PAGE>

Southwest Airlines Co.
6-1162-RLL-933R10   Page 8

Aircraft under the Agreement will be on a one-for-one basis, for each Aircraft
so terminated.

Any cancellation of an Option to purchase which is based on failure to make the
required Deposit or to exercise the Option to purchase shall only apply to the
Option Aircraft so canceled.

Termination of an Option to purchase provided by this letter agreement will be
caused by either party giving written notice to the other within 10 days after
the applicable date. Upon receipt of such notice, all rights and obligations of
the parties with respect to an Option Aircraft for which the Option to purchase
has been terminate will thereupon terminate.

If termination is result of a revision of an Option exercise date by Boeing
pursuant to paragraph 5.2, Boeing will promptly refund to Buyer, with interest,
any payments received from Buyer, including the Deposit, with respect to the
Option Aircraft for which the Option is terminated. If termination is for any
other reason, Boeing will promptly refund to Buyer, without interest, any
payments received from Buyer with respect to the affected Option Aircraft,
except the Deposit, which Buyer may apply to any model Boeing aircraft purchased
by Buyer from Boeing at a future date.

8.       Confidential Treatment. Buyer understands that certain commercial and
         financial information contained in this Letter Agreement including any
         attachments hereto is considered by Boeing as confidential. Buyer
         agrees that it will treat this Letter Agreement and the

P.A. No. 1810
K/SWA                                                                      SA-17

<PAGE>

Southwest Airlines Co.
6-1162-RLL-933R10   Page 9

9.       information contained herein as confidential and will not, without the
         prior written consent of Boeing, disclose this Letter Agreement or any
         information contained herein to any other person or entity except as
         provided in Letter Agreement No. 6-1162-RLL-934, as amended.

Very truly yours,

THE BOEING COMPANY

By /s/ MICHAEL S. ANDERSON
  ------------------------------------

Its ATTORNEY-IN-FACT
   -----------------------------------

ACCEPTED AND AGREED TO this

date: AUGUST 21, 2001
     ---------------------------------

SOUTHWEST AIRLINES CO.

By /s/ LAURA WRIGHT
  ------------------------------------

Its V.P. - FINANCE & TREASURER
   -----------------------------------

Attachments

P.A. No. 1810
K/SWA                                                                      SA-17

<PAGE>

Attachment A to
6-1162-RLL-933R10
Page 1

Model 737-7H4 Aircraft

1.       Option Aircraft Description and Changes.

         1.1 Aircraft Description. The Option Aircraft is described by Boeing
Detail Specification D6-38808-1, Dated October 30 ,1996 and for Block U Option
Aircraft by Boeing Detail Specification D6-38808-1, Rev. A, Dated February 24,
1998.

         1.2 Changes. The Detail Specification will be revised to include:

                  (1) Changes applicable to the basic Model 737-700 aircraft
which are developed by Boeing between the date of the Detail Specification and
the signing of a definitive agreement to purchase the Option Aircraft.

                  (2) Changes mutually agreed upon.

                  (3) Changes required to obtain a Standard Certificate of
Airworthiness.

                  (4) To provide sufficient Option Aircraft manufacturing and
procurement lead time it is necessary for Boeing and Buyer to reach final
agreement on the Option Aircraft configuration, including BFE/SPE vendor
selection fifteen (15) months prior to delivery of each Option Aircraft. If such
items are not resolved by the indicated dates, Boeing reserves the right to
amend this letter agreement:

                           (i) to adjust the scheduled delivery of the Option
Aircraft to a later time period and,

                           (ii) to make such other changes as are appropriate
and consistent with the revised Option Aircraft deliveries.

         1.3 Effect of Changes. Changes to the Detail Specification incorporated
pursuant to the provisions of the clauses above will include the effects of such
changes upon Option Aircraft weight, balance, design and performance.
Performance guarantees for the Option Aircraft which are mutually acceptable to
the parties will be included in the definitive agreement for the Option
Aircraft.

P.A. No. 1810
K/SWA                                                                      SA-17

<PAGE>

Attachment A to
6-1162-RLL-933R10
Page 2

2.       Price Description

         2.1 Price Elements Per Aircraft

<Table>
<Caption>
                         1               2            3
                -----------------    ----------    ----------

                    AIRCRAFT &                                    ADV. PMT.
AIRCRAFT        ESTIMATED SPECIAL                  ESTIMATED     BASE PRICE
DELIVERY          FEATURES PRICE     ESTIMATED     ESCALATION    (ELEMENTS)
MO. & YR.          (JULY 1992$)      ESCALATION     SHARING      1 + 2 + 3
---------       -----------------    ----------    ----------    ----------
<S>            <C>                   <C>          <C>           <C>

BLOCK M

MARCH 2003      ***                ***             ***          ***
APRIL 2003      ***                ***             ***          ***
JULY 2003       ***                ***             ***          ***
OCTOBER 2003    ***                ***             ***          ***

BLOCK N

JANUARY 2004    ***                ***             ***          ***
FEBRUARY 2004   ***                ***             ***          ***
MARCH 2004      ***                ***             ***          ***
APRIL 2004      ***                ***             ***          ***
MAY 2004        ***                ***             ***          ***
JUNE 2004       ***                ***             ***          ***
AUGUST 2004     ***                ***             ***          ***
SEPTEMBER 2004  ***                ***             ***          ***
OCTOBER 2004    ***                ***             ***          ***

BLOCK O

JANUARY 2005    ***                ***             ***          ***
MARCH 2005      ***                ***             ***          ***
APRIL 2005      ***                ***             ***          ***
JULY 2005       ***                ***             ***          ***
OCTOBER 2005    ***                ***             ***          ***

BLOCK P

JANUARY 2006    ***                ***             ***          ***
MARCH 2006      ***                ***             ***          ***
APRIL 2006      ***                ***             ***          ***
JULY 2006       ***                ***             ***          ***
OCTOBER 2006    ***                ***             ***          ***
</Table>

P.A. No. 1810
K/SWA                                                                      SA-17

<PAGE>

Attachment A to
6-1162-RLL-933R10
Page 3

<Table>
<Caption>
                    AIRCRAFT &
                     ADV. PMT.
AIRCRAFT        ESTIMATED SPECIAL                  ESTIMATED     BASE PRICE
DELIVERY         FEATURES PRICE      ESTIMATED     ESCALATION    (ELEMENTS)
MO. & YR.         (JULY 1999$)       ESCALATION     SHARING      1 + 2 + 3
---------       -----------------    ----------    ----------    ----------
<S>            <C>                   <C>           <C>           <C>

BLOCK U

JANUARY 2008           ***             ***             ***             ***
FEBRUARY 2008          ***             ***             ***             ***
MARCH 2008             ***             ***             ***             ***
APRIL 2008             ***             ***             ***             ***
MAY 2008               ***             ***             ***             ***
JUNE 2008              ***             ***             ***             ***
JULY 2008              ***             ***             ***             ***
AUGUST 2008            ***             ***             ***             ***
SEPTEMBER 2008         ***             ***             ***             ***
OCTOBER 2008           ***             ***             ***             ***
NOVEMBER 2008          ***             ***             ***             ***
DECEMBER 2008          ***             ***             ***             ***
</Table>

2.       Price Description. (Continued)

         2.2 Price Adjustments For Option Aircraft Delivering From January 2005
through December 2012.

                  2.2.1 Special Features. The price for Special Features
incorporated in the Option Aircraft Detail Specification will be adjusted to
Boeing's then-current prices for such features as of the date of execution of
the definitive agreement for the Option Aircraft.

                  2.2.2 Escalation Adjustments. For escalation provisions
applicable to Option Aircraft delivering after 2004, see paragraph 2.2.6 below.

                  2.2.3 Base Price Adjustments for FAA Changes. The Aircraft
Basic Price of the Option Aircraft will be adjusted for any FAA mandated changes
incorporated into the Aircraft.

                  2.2.4 Price Adjustments for Changes. Boeing may adjust the
Aircraft Basic Price and the Advance Payment Base Price for any changes mutually
agreed upon subsequent to the date that Buyer and Boeing enter into a definitive
agreement for the Option Aircraft.

                  2.2.5 Base Price Adjustments. The Aircraft Basic Price of the
Option Aircraft will be adjusted to Boeing's then-current prices as of the date
of execution of the definitive agreement for the Option Aircraft in

P.A. No. 1810
K/SWA                                                                      SA-17

<PAGE>

Attachment A to
6-1162-RLL-933R10
Page 4

accordance with the agreement reached below. The Aircraft Basic Price starting
point for Option Aircraft delivering in 2003 is *** (July 1992 STE), for Option
Aircraft delivering in 2004 is *** (July 1992 STE), for Options delivering in
2005 through 2009 is *** (July 1992 STE) and for Block U Option Aircraft is ***
(July 1999 STE). Such Aircraft Basic Price may increase in accordance with
paragraphs 2.2.1, 2.2.2, 2.2.3 and 2.2.4. For any other changes to the Aircraft
Basic Price, Boeing may increase the Aircraft Basic Price by a maximum of ***
(July 1992 STE) for Aircraft delivering in 2005; by a maximum of *** (July 1992
STE) per year or portion thereof starting in January 2006 through 2009. For
Block U Option Aircraft Boeing may increase the Aircraft Basic Price by a
maximum of *** (July 1999 STE) per year or portion thereof starting in January
2008.

                  2.2.6 Prices for Long Lead Time Aircraft. Boeing has not
established escalation provisions for Model 737-700 aircraft for delivery 2005
and after. Such escalation provisions (i) will be incorporated into the Option
Aircraft definitive agreement when such information is available and (ii) will
be the then-current escalation provisions applicable to the same model aircraft
and engines delivering in the same time period as the Option Aircraft. The
resulting revisions to the definitive agreement will include but not be limited
to, adjustment of the Aircraft Basic Price of the Option Aircraft, the Advance
Payment Base Price, the Aircraft escalation provisions and the advance payment
amounts due on the Option Aircraft.

                  2.2.7 BFE to SPE. An estimate of the total price for items of
Buyer Furnished Equipment (BFE) changed to Seller Purchased Equipment (SPE)
pursuant to the Configuration Specification is included in the Option Aircraft
price build-up. The purchase price of the Option Aircraft will be adjusted by
the price charged to Boeing for such items plus 10% of such price. If all BFE
except developmental avionics is converted to SPE, Boeing will waive the 10%
fee.

3.       Advance Payment Schedules, Prices and Adjustments.

         3.1 Buyer will pay to Boeing advance payments for the Option Aircraft
on the dates and in the amounts determined below.

P.A. No. 1810
K/SWA                                                                      SA-17

<PAGE>

Attachment A to
6-1162-RLL-933R10
Page 5

<Table>
<Caption>
                                                                 Amount Due per Aircraft
                                                                    (Percentage times
Due Date of Payment                                            Advance Payment Base Price)
-------------------                                            ---------------------------
<S>                                                            <C>

Deposit                                                              ***(if
                                                                     applicable)

18 months prior to the first                                         15% (less the
day of the scheduled delivery                                             Deposit if any)
month of the Aircraft

12 months prior to the first                                         5%
day of the scheduled delivery
month of the Aircraft

9 months prior to the first                                          5%
day of the scheduled delivery
month of the Aircraft

6 months prior to the first                                          5%
day of the scheduled delivery
month of the Aircraft
                                                                   ---

                    Total                                           30%
</Table>

Any advance payments that would be past due as of the date of signing the
definitive purchase agreement for the Option Aircraft in accordance with the
above schedule are due and payable on such date.

         3.2 Option Aircraft advance payment base prices will be increased or
decreased, as appropriate, at the time of signing of the definitive purchase
agreement for the Option Aircraft, using the then-current forecasted aircraft
escalation factors used by Boeing, to determine the amount of the advance
payments to be made by Buyer on the Option Aircraft.

P.A. No. 1810
K/SWA                                                                      SA-17

<PAGE>

                          Supplemental Agreement No. 18

                                       to

                           Purchase Agreement No. 1810

                                     between

                               THE BOEING COMPANY

                                       and

                             SOUTHWEST AIRLINES CO.

                    Relating to Boeing Model 737-7H4 Aircraft

         THIS SUPPLEMENTAL AGREEMENT, entered into as of OCTOBER 17, 2001, by
and between THE BOEING COMPANY, a Delaware corporation with its principal
offices in Seattle, Washington, (Boeing) and SOUTHWEST AIRLINES CO., a Texas
corporation with its principal offices in Dallas, Texas (Buyer);

         WHEREAS, the parties hereto entered into Purchase Agreement No. 1810
dated January 19, 1994, relating to Boeing Model 737-7H4 aircraft (the
Agreement) and;

         WHEREAS, Buyer has agreed to decelerate delivery dates of Aircraft as
follows:

         *** PURSUANT TO 17 CFR 240.24b-2, CONFIDENTIAL INFORMATION HAS BEEN
OMITTED AND HAS BEEN FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE
COMMISSION PURSUANT TO A CONFIDENTIAL TREATMENT APPLICATION FILED WITH THE
COMMISSION.

                                     SA-18-1

P.A. No. 1810
K/SWA

<PAGE>

<Table>
<S>                                                          <C>
                                Block E Aircraft

             WAS

             December 2000                                    Two (2)
             January 2001                                     One (1)
             February 2001                                    One (1)
             March 2001                                       Two (2)
             June 2001                                        Three (3)
             September 2001                                   Three (3)

             NEW

             December 2000                                    Two (2)
             January 2001                                     One (1)
             February 2001                                    One (1)
             March 2001                                       Two (2)
             June 2001                                        Three (3)
             September 2001                                   One (1)
             November 2001                                    Two (2)

                                Block H Aircraft

             WAS

             June 1999                                        Two (2)
             July 1999                                        One (1)
             August 1999                                      One (1)
             September 1999                                   Two (2)
             October 1999                                     One (1)
             March 2000                                       One (1)
             April 2000                                       Two (2)
             September 2000                                   One (1)
             October 2000                                     Two (2)
             March 2001                                       Two (2)
             April 2001                                       One (1)
             October 2001                                     Three (3)

             NEW

             June 1999                                        Two (2)
             July 1999                                        One (1)
             August 1999                                      One (1)
             September 1999                                   Two (2)
             October 1999                                     One (1)
             March 2000                                       One (1)
             April 2000                                       Two (2)
             September 2000                                   One (1)
             October 2000                                     Two (2)
             March 2001                                       Two (2)
             April 2001                                       One (1)
             November 2001                                    Three (3)

                                Block I Aircraft

             WAS

             November 2001                                    Two (2)
             December 2001                                    One (1)
             January 2002                                     One (1)
             March 2002                                       Four (4)
             April 2002                                       Two (2)
             July 2002                                        Four (4)
             October 2002                                     Four (4)
</Table>

                                     SA-18-2

P.A. No. 1810
K/SWA

<PAGE>

<Table>
<S>                                                         <C>
             NEW

             November 2001                                    Two (2)
             December 2001                                    One (1)
             January 2002                                     One (1)
             March 2002                                       Four (4)
             April 2002                                       Two (2)
             May 2003                                         One (1)
             June 2003                                        Two (2)
             July 2003                                        One (1)
             September 2003                                   Two (2)
             October 2003                                     Two (2)

                                Block J Aircraft

             WAS

             January 2003                                     Four (4)
             March 2003                                       One (1)

             NEW

             November 2003                                    Two (2)
             February 2004                                    Two (2)
             March 2004                                       One (1)

                                Block K Aircraft

             WAS

             April 2004                                       Two (2)
             July 2004                                        Three (3)

             NEW

             March 2004                                       One (1)
             April 2004                                       Three (3)
             May 2004                                         One (1)

                                Block L Aircraft

             WAS

             October 1999                                     One (1)
             November 1999                                    Two (2)
             December 1999                                    One (1)
             June 2000                                        Three (3)
             July 2000                                        Three (3)
             September 2000                                   One (1)
             October 2000                                     One (1)
             November 2000                                    Four (4)
             December 2000                                    One (1)
             January 2001                                     One (1)
             February 2001                                    One (1)
             July 2001                                        One (1)
             September 2001                                   One (1)
             October 2001                                     One (1)
             September 2002                                   Three (3)

             NEW

             October 1999                                     One (1)
             November 1999                                    Two (2)
             December 1999                                    One (1)
</Table>

                                     SA-18-3

P.A. No. 1810
K/SWA

<PAGE>

<Table>
<S>                                                         <C>
             June 2000                                        Three (3)
             July 2000                                        Three (3)
             September 2000                                   One (1)
             October 2000                                     One (1)
             November 2000                                    Four (4)
             December 2000                                    One (1)
             January 2001                                     One (1)
             February 2001                                    One (1)
             July 2001                                        One (1)
             November 2001                                    Two (2)
             July 2003                                        One (1)
             August 2003                                      Two (2)

                                Block T Aircraft

             WAS

             November 2001                                    One (1)
             February 2002                                    One (1)
             May 2002                                         One (1)
             June 2002                                        Two (2)
             July 2002                                        One (1)
             August 2002                                      Two (2)
             November 2002                                    Two (2)
             February 2003                                    One (1)
             May 2003                                         Two (2)
             June 2003                                        Two (2)
             August 2003                                      Three (3)
             February 2004                                    Three (3)
             March 2004                                       Three (3)
             April 2004                                       One (1)
             May 2004                                         Four (4)
             June 2004                                        Three (3)
             July 2004                                        Two (2)
             August 2004                                      Two (2)
             September 2004                                   Two (2)
             October 2004                                     Two (2)
             November 2004                                    Two (2)
             February 2005                                    One (1)
             May 2005                                         One (1)
             June 2005                                        One (1)
             August 2005                                      One (1)
             September 2005                                   One (1)
             February 2006                                    Three (3)
             March 2006                                       One (1)
             May 2006                                         Three (3)
             June 2006                                        Four (4)
             July 2006                                        One (1)
             August 2006                                      Three (3)
             September 2006                                   Three (3)
             November 2006                                    Two (2)
             December 2006                                    Two (2)
             January 2007                                     Two (2)
             February 2007                                    Three (3)
             March 2007                                       Two (2)
</Table>

                                     SA-18-4

P.A. No. 1810
K/SWA

<PAGE>

<Table>
<S>                                                         <C>
             April 2007                                       Two (2)
             May 2007                                         Two (2)
             June 2007                                        Two (2)
             July 2007                                        Two (2)
             August 2007                                      Two (2)
             September 2007                                   Two (2)
             October 2007                                     Two (2)
             November 2007                                    Two (2)
             December 2007                                    Two (2)

             NEW

             November 2001                                    One (1)
             February 2002                                    One (1)
             May 2004                                         One (1)
             June 2004                                        Four (4)
             July 2004                                        Four (4)
             August 2004                                      Two (2)
             September 2004                                   Two (2)
             November 2004                                    One (1)
             December 2004                                    One (1)
             January 2005                                     Five (5)
             February 2005                                    Two (2)
             March 2005                                       One (1)
             April 2005                                       Two (2)
             May 2005                                         One (1)
             June 2005                                        Three (3)
             July 2005                                        Two (2)
             August 2005                                      One (1)
             September 2005                                   Two (2)
             October 2005                                     One (1)
             November 2005                                    Two (2)
             December 2005                                    Two (2)
             February 2006                                    Four (4)
             May 2006                                         Three (3)
             June 2006                                        Four (4)
             July 2006                                        One (1)
             August 2006                                      Three (3)
             September 2006                                   Three (3)
             November 2006                                    Two (2)
             December 2006                                    Two (2)
             January 2007                                     Two (2)
             February 2007                                    Three (3)
             March 2007                                       Two (2)
             April 2007                                       Two (2)
             May 2007                                         Two (2)
             June 2007                                        Two (2)
             July 2007                                        Two (2)
             August 2007                                      Two (2)
             September 2007                                   Two (2)
             October 2007                                     Two (2)
             November 2007                                    Two (2)
             December 2007                                    Two (2)
             January 2008                                     One (1)
             February 2008                                    One (1)
</Table>

                                     SA-18-5

P.A. No. 1810
K/SWA

<PAGE>

<Table>
<S>                                                         <C>
             March 2008                                       One (1)
             April 2008                                       One (1)
             May 2008                                         One (1)
             June 2008                                        One (1)
</Table>

         ***

         WHEREAS, Buyer has agreed to decelerate delivery dates of Option
Aircraft as follows:

<Table>
<S>                                                           <C>
                             Block M Option Aircraft

             WAS

             March 2003                                       Three  (3)
             April 2003                                       Two   (2)
             July 2003                                        Four  (4)
             October 2003                                     Four  (4)

             NEW

             March 2004                                       Three (3)
             April 2004                                       Two (2)
             June 2004                                        Two (2)
             July 2004                                        Two (2)
             October 2004                                     Four (4)

                             Block N Option Aircraft

             WAS

             January 2004                                     Four (4)
             February 2004                                    One (1)
             March 2004                                       One (1)
             April 2004                                       One (1)
             May 2004                                         One (1)
             June 2004                                        One (1)
             August 2004                                      Two (2)
             September 2004                                   Three (3)
             October 2004                                     Two (2)

             NEW

             February 2005                                    One (1)
             March 2005                                       Four (4)
             April 2005                                       Two (2)
             May 2005                                         One (1)
             June 2005                                        One (1)
             July 2005                                        Two (2)
             August 2005                                      Two (2)
             September 2005                                   Three (3)
             October 2005                                     Two (2)
             November 2005                                    One (1)
             December 2005                                    One (1)

                             Block O Option Aircraft

             WAS

             January 2005                                     Four (4)
             March 2005                                       Four (4)
             April 2005                                       Two (2)
             July 2005                                        Four (4)
             October 2005                                     Four (4)
</Table>

                                     SA-18-6

P.A. No. 1810
K/SWA

<PAGE>

<Table>
<S>                                                         <C>
             NEW

             January 2006                                     Two (2)
             March 2006                                       Four (4)
             April 2006                                       Two (2)
             May 2006                                         Two (2)
             June 2006                                        Two (2)
             July 2006                                        Two (2)
             August 2006                                      Two (2)
             October 2006                                     One (1)
             November 2006                                    Two (2)
             December 2006                                    One (1)

                             Block P Option Aircraft

             WAS

             January 2006                                     Four (4)
             March 2006                                       Four (4)
             April 2006                                       Two (2)
             July 2006                                        Four (4)
             October 2006                                     One (1)

             NEW

             April 2007                                       One (1)
             May 2007                                         One (1)
             June 2007                                        One (1)
             July 2007                                        One (1)
             August 2007                                      One (1)
             September 2007                                   One (1)
             October 2007                                     One (1)
             November 2007                                    One (1)
             December 2007                                    One (1)
</Table>

         NOW THEREFORE, in consideration of the mutual covenants herein
contained, the parties agree to amend the Agreement as follows:

1. The Table of Contents of the Agreement is deleted in its entirety and a new
Table of Contents is attached hereto and incorporated into the Agreement by this
reference.

2. Article 2, entitled "Delivery, Title and Risk of Loss," is deleted in its
entirety and replaced by a new Article 2. Such new pages 2-1, 2-2, 2-3 and 2-4
are attached hereto and incorporated into the Agreement by this reference.

3. Article 3, entitled "Price of Aircraft", is deleted in its entirety and
replaced by a new Article 3. Such new pages 3-1, 3-2, 3-3, 3-4, 3-5 and 3-6 are
attached hereto and incorporated into the Agreement by this reference.

                                     SA-18-7

P.A. No. 1810
K/SWA

<PAGE>

4. Boeing shall retain Advance Payments made by Buyer to Boeing without interest
compensation by Boeing to Buyer. These retained Advance Payments shall be
applied to Buyer's future Advance Payment requirements, such that no Advance
Payments will be due from Buyer for any Aircraft to the extent the aggregate
Advance Payments held by Boeing exceed the aggregate Advance Payments required
for all Aircraft as required by Article 5.

5. Buyer shall ensure that Buyer's suppliers of BFE meet delivery requirements
to support the Aircraft delivery schedule of this Supplemental Agreement.

6. Letter Agreement No. 6-1162-MSA-185 entitled "Delivery Change Contractual
Matters," is attached hereto and is hereby incorporated into the Agreement by
this reference.

7. Letter Agreement No. 6-1162-RLL-933R10 entitled "Option Aircraft," is deleted
in its entirety and replaced by a new Letter Agreement No. 6-1162-RLL-933R11
which is attached hereto and is incorporated into the Agreement by this
reference.

The Agreement will be deemed to be supplemented to the extent herein provided
and as so supplemented will continue in full force and effect.

EXECUTED IN DUPLICATE as of the day and year first above written.

THE BOEING COMPANY                      SOUTHWEST AIRLINES CO.

By: /s/ MICHAEL S. ANDERSON             By: /s/ LAURA WRIGHT
    --------------------------              -------------------------

Its:    Attorney-In-Fact                Its: VP Finance & Treasurer
     -------------------------               ------------------------

                                     SA-18-8

P.A. No. 1810
K/SWA

<PAGE>

                                TABLE OF CONTENTS

<Table>
<Caption>
                                                                                       Page             SA
                                                                                     Number         Number
                                                                                     ------         ------
ARTICLES
--------
<S>                                                                                  <C>            <C>

1.                       Subject Matter of Sale..........................................1-1         SA-13

2.                       Delivery, Title and Risk
                         of Loss.........................................................2-1         SA-18

3.                       Price of Aircraft...............................................3-1         SA-18

4.                       Taxes...........................................................4-1

5.                       Payment.........................................................5-1

6.                       Excusable Delay.................................................6-1

7.                       Changes to the Detail
                         Specification...................................................7-1          SA-1

8.                       Federal Aviation Requirements and
                         Certificates and Export License.................................8-1

9.                       Representatives, Inspection,
                         Flights and Test Data...........................................9-1

10.                      Assignment, Resale or Lease....................................10-1

11.                      Termination for Certain Events.................................11-1

12.                      Product Assurance; Disclaimer and
                         Release; Exclusion of Liabilities;
                         Customer Support; Indemnification
                         and Insurance..................................................12-1

13.                      Buyer Furnished Equipment and
                         Spare Parts....................................................13-1

14.                      Contractual Notices and Requests...............................14-1

15.                      Miscellaneous..................................................15-1
</Table>

                                        i

P.A. No. 1810
K/SWA                                                                      SA-18

<PAGE>

                                TABLE OF CONTENTS

<Table>
<Caption>
                                                                                                     SA
                                                                                                 Number
                                                                                                 ------

EXHIBITS
--------
<S>                                                                                           <C>

A                        Aircraft Configuration                                                  SA-13

B                        Product Assurance Document                                              SA-1

C                        Customer Support Document

D                        Price Adjustments Due to
                         Economic Fluctuations - Aircraft                                        SA-13

E                        Buyer Furnished Equipment
                         Provisions Document

F                        Defined Terms Document
</Table>

<Table>
<Caption>
LETTER AGREEMENTS
-----------------

<S>                      <C>
1810-1                   Waiver of Aircraft Demonstration Flight
</Table>

                                       ii

P.A. No. 1810
K/SWA                                                                      SA-18

<PAGE>

                                TABLE OF CONTENTS

<Table>
<Caption>
                                                                                                 SA
                                                                                             Number
                                                                                             ------
RESTRICTED LETTER AGREEMENTS
----------------------------

<S>                            <C>                                                        <C>
6-1162-RLL-932R2               Promotional Support                                           SA-13

6-1162-RLL-933R11              Option Aircraft                                               SA-18

6-1162-RLL-934R3               Disclosure of Confidential                                    SA-14
                               Information

6-1162-RLL-935R1               Performance Guarantees                                        SA-1

6-1162-RLL-936R4               Certain Contractual Matters                                   SA-4

6-1162-RLL-937                 Alternate Advance Payment Schedule

6-1162-RLL-938                   ***

6-1162-RLL-939R1               Certification Flight Test Aircraft                            SA-1

6-1162-RLL-940R1               Training Matters                                              SA-1

6-1162-RLL-941R2               Other Matters                                                 SA-13

6-1162-RLL-942                 Open Configuration Matters

6-1162-RLL-943R1               Substitution Rights                                           SA-6

6-1162-RLL-944                 Airframe Maintenance Material Cost
                               Protection Program

6-1162-RLL-945                 Comparison of 737-7H4 and 737-3H4
                               Block Fuel Burn

6-1162-RLL-1855R3              Additional Contractual Matters                                SA-4

6-1162-RLL-1856                ***                                                           SA-1

6-1162-RLL-1857                Service Ready Validation Program                              SA-1
                               Field Test

6-1162-RLL-1858R1              Escalation Matters                                            SA-4
</Table>

                                       iii

P.A. No. 1810
K/SWA                                                                      SA-18

<PAGE>

                             TABLE OF CONTENTS CON'T

<Table>
<Caption>
                                                                                                 SA
                                                                                             Number
                                                                                             ------
RESTRICTED LETTER AGREEMENTS
----------------------------
<S>                            <C>                                                        <C>

6-1162-RLL-2036                Amortization of Costs for
                               Customer Unique Changes                                       SA-1

6-1162-RLL-2037                Reconciliation of the Aircraft                                SA-1
                               Basic Price

6-1162-RLL-2073                Maintenance Training Matters                                  SA-1

6-1162-KJJ-054                 Business Matters                                              SA-13

6-1162-KJJ-055                 Structural Matters                                            SA-13

6-1162-KJJ-056                 Noise and Emission Matters                                    SA-13

6-1162-KJJ-057                 Product Development Matters                                   SA-13

6-1162-KJJ-058                 Additional Substitution Rights                                SA-13

6-1162-KJJ-150                 Flight Control Computer & Mode                                SA-14
                               Control Panel Spares Matter

6-1162-MSA-185                 Delivery Change Contractual                                   SA-18
                               Matters
</Table>

                                       iv

P.A. No. 1810
K/SWA                                                                      SA-18

<PAGE>

ARTICLE 2.        Delivery, Title and Risk of Loss.

         2.1 Time of Delivery. The Aircraft will be delivered to Buyer by
Boeing, assembled and ready for flight and Buyer will accept delivery of the
Aircraft, in accordance with the following schedule:

<Table>
<Caption>
             Month and Year
               of Delivery                           Quantity of Aircraft
             --------------                          --------------------
<S>                                                  <C>

                                Block E Aircraft

             December 2000                                    Two (2)
             January 2001                                     One (1)
             February 2001                                    One (1)
             March 2001                                       Two (2)
             June 2001                                        Three (3)
             September 2001                                   One (1)
             November 2001                                    Two (2)

                                Block F Aircraft

             October 1998                                     One (1)
             November 1998                                    Two (2)
             December 1998                                    Two (2)

                                Block G Aircraft

             March 1999                                       Two (2)

                                Block H Aircraft

             June 1999                                        Two (2)
             July 1999                                        One (1)
             August 1999                                      One (1)
             September 1999                                   Two (2)
             October 1999                                     One (1)
             March 2000                                       One (1)
             April 2000                                       Two (2)
             September 2000                                   One (1)
             October 2000                                     Two (2)
             March 2001                                       Two (2)
             April 2001                                       One (1)
             November 2001                                    Three (3)

                                Block I Aircraft

             November 2001                                    Two (2)
             December 2001                                    One (1)
             January 2002                                     One (1)
             March 2002                                       Four (4)
</Table>

                                       2-1

P.A. No. 1810
K/SWA                                                                      SA-18

<PAGE>

<Table>
<S>                                                  <C>
             April 2002                                       Two (2)
             May 2003                                         One (1)
             June 2003                                        Two (2)
             July 2003                                        One (1)
             September 2003                                   Two (2)
             October 2003                                     Two (2)

                                Block J Aircraft

             November 2003                                    Two (2)
             February 2004                                    Two (2)
             March 2004                                       One (1)

                                Block K Aircraft

             March 2004                                       One (1)
             April 2004                                       Three (3)
             May 2004                                         One (1)

                                Block L Aircraft

             October 1999                                     One (1)
             November 1999                                    Two (2)
             December 1999                                    One (1)
             June 2000                                        Three (3)
             July 2000                                        Three (3)
             September 2000                                   One (1)
             October 2000                                     One (1)
             November 2000                                    Four (4)
             December 2000                                    One (1)
             January 2001                                     One (1)
             February 2001                                    One (1)
             July 2001                                        One (1)
             November 2001                                    Two (2)
             July 2003                                        One (1)
             August 2003                                      Two (2)

                                Block T Aircraft

             November 2001                                    One (1)
             February 2002                                    One (1)
             May 2004                                         One (1)
             June 2004                                        Four (4)
             July 2004                                        Four (4)
             August 2004                                      Two (2)
             September 2004                                   Two (2)
             November 2004                                    One (1)
             December 2004                                    One (1)
             January 2005                                     Five (5)
             February 2005                                    Two (2)
             March 2005                                       One (1)
             April 2005                                       Two (2)
             May 2005                                         One (1)
</Table>

                                       2-2

P.A. No. 1810
K/SWA                                                                      SA-18

<PAGE>

<Table>
<S>                                                  <C>
             June 2005                                        Three (3)
             July 2005                                        Two (2)
             August 2005                                      One (1)
             September 2005                                   Two (2)
             October 2005                                     One (1)
             November 2005                                    Two (2)
             December 2005                                    Two (2)
             February 2006                                    Four (4)
             May 2006                                         Three (3)
             June 2006                                        Four (4)
             July 2006                                        One (1)
             August 2006                                      Three (3)
             September 2006                                   Three (3)
             November 2006                                    Two (2)
             December 2006                                    Two (2)
             January 2007                                     Two (2)
             February 2007                                    Three (3)
             March 2007                                       Two (2)
             April 2007                                       Two (2)
             May 2007                                         Two (2)
             June 2007                                        Two (2)
             July 2007                                        Two (2)
             August 2007                                      Two (2)
             September 2007                                   Two (2)
             October 2007                                     Two (2)
             November 2007                                    Two (2)
             December 2007                                    Two (2)
             January 2008                                     One (1)
             February 2008                                    One (1)
             March 2008                                       One (1)
             April 2008                                       One (1)
             May 2008                                         One (1)
             June 2008                                        One (1)
</Table>

         2.2 Notice of Target Delivery Date. Boeing will give Buyer notice of
the Target Delivery Date of the Aircraft approximately 30 days prior to the
scheduled month of delivery.

         2.3 Notice of Delivery Date. If Boeing gives Buyer at least 7 days'
notice of the delivery date of the Aircraft, and an Aircraft delivery is delayed
beyond such delivery date due to the responsibility of Buyer, Buyer will
reimburse Boeing for all costs incurred by Boeing as a result of such delay,
including amounts for storage, insurance, Taxes, preservation or protection of
the Aircraft and interest on payments due.

         2.4 Place of Delivery. The Aircraft will be delivered at an airport
facility selected by Boeing in the State of Washington, unless mutually agreed
otherwise.

                                       2-3

P.A. No. 1810
K/SWA                                                                      SA-18

<PAGE>

         2.5 Title and Risk of Loss. Title to and risk of loss of an Aircraft
will pass from Boeing to Buyer upon delivery of such Aircraft, but not prior
thereto.

         2.6 Bill of Sale. Upon delivery of an Aircraft Boeing will deliver to
Buyer a bill of sale conveying good title to such Aircraft, free of all liens,
claims, charges and encumbrances of every kind whatsoever, and such other
appropriate documents of title as Buyer may reasonably request.

                                       2-4

P.A. No. 1810
K/SWA                                                                      SA-18

<PAGE>

ARTICLE 3.        Price of Aircraft.

         3.1 Definitions.

                  3.1.1 Special Features are the features incorporated in
Exhibit A which have been selected by Buyer.

                  3.1.2 Base Aircraft Price is the Aircraft Basic Price
excluding the price of Special Features.

                  3.1.3 Aircraft Basic Price is comprised of the Base Aircraft
Price and the price of the Special Features.

                  3.1.4 Economic Price Adjustment is the adjustment to the
Aircraft Basic Price (Base Aircraft and Special Features) as calculated pursuant
to Exhibit D or Exhibit D-1 as applicable.

                  3.1.5 Aircraft Price is the total amount Buyer is to pay for
the Aircraft at the time of delivery.

         3.2 Aircraft Basic Price.

                  The Aircraft Basic Price for Block A through L Aircraft, is
expressed in July 1992 dollars; the Aircraft Basic Price for Block T Aircraft,
is expressed in July 1999 dollars; as set forth below:

<Table>
<Caption>
                                 Base                            Special                            Aircraft
                                 Aircraft Price                  Features                           Basic Price
                                 --------------                  --------                           -----------
<S>                            <C>                               <C>                                <C>
Block A, B, C,
D & E Aircraft                   ***                             ***                                ***
Block F & G
Aircraft                         ***                             ***                                ***
Block H
Aircraft                         ***                             ***                                ***
Block I
Aircraft                         ***                             ***                                ***
Block J
Aircraft                         ***                             ***                                ***
Block K
Aircraft                         ***                             ***                                ***
Block L
Aircraft                         ***                             ***                                ***

Block T
Aircraft                         ***                             ***                                ***
</Table>

                                       3-1

P.A. No. 1810
K/SWA                                                                      SA-18

<PAGE>

         3.3 Aircraft Price. The Aircraft Price will be established at the time
of delivery of such Aircraft to Buyer and will be the sum of:

                  3.3.1 the Aircraft Basic Price, which is *** for the Block A,
B, C, D and E Aircraft, *** for the Block F and G Aircraft, *** for the Block H
Aircraft, *** for the Block I Aircraft, *** for the Block J Aircraft, *** for
the Block K Aircraft and *** for the Block L Aircraft; *** for the Block T
Aircraft; plus

                  3.3.2 the Economic Price Adjustments for the Aircraft Basic
Price, as calculated pursuant to the formulas set forth in Exhibit D (Price
Adjustments Due to Economic Fluctuations - Aircraft) for Aircraft Block A
through L, and in Exhibit D-1 (Price Adjustments Due to Economic Fluctuations -
Aircraft) for Aircraft Block T; plus

                  3.3.3 other price adjustments made pursuant to this Agreement
or other written agreements executed by Boeing and Buyer.

         3.4 Advance Payment Base Price.

                  3.4.1 Advance Payment Base Price. For advance payment
purposes, the following estimated delivery prices of the Aircraft (Advance
Payment Base Price) have been established, using currently available forecasts
of the escalation factors used by Boeing as of the date of signing this
Agreement. The Advance Payment Base Price of each Aircraft is set forth below:

<Table>
<Caption>
             Month and Year of                                Advance Payment Base
             Scheduled Delivery                               Price per Aircraft
             ------------------                               --------------------
<S>                                                           <C>

                               Block A Aircraft***

             October 1997
             November 1997

                               Block B Aircraft***

             January 1998
             February 1998
             March 1998
             April 1998
             May 1998
             June 1998
             July 1998
             September 1998
</Table>

                                       3-2

P.A. No. 1810
K/SWA                                                                      SA-18

<PAGE>

<Table>
<S>                                                    <C>
                               Block C Aircraft***

             February 1999
             May 1999
             July 1999
             August 1999
             September 1999

                               Block D Aircraft***

             November 1999
             December 1999
             January 2000
             March 2000
             July 2000
             August 2000

                               Block E Aircraft***

             December 2000
             January 2001
             February 2001
             March 2001
             June 2001
             September 2001
             November 2001

                               Block F Aircraft***

             October 1998
             November 1998
             December 1998

                               Block G Aircraft***

             March 1999

                               Block H Aircraft***

             June 1999
             July 1999
             August 1999
             September 1999
             October 1999
             March 2000
             April 2000
             September 2000
             October 2000
             March 2001
             April 2001
             November 2001
</Table>

                                       3-3

P.A. No. 1810
K/SWA                                                                      SA-18

<PAGE>

<Table>
<S>                                                    <C>
                               Block I Aircraft***

             November 2001
             December 2001
             January 2002
             March 2002
             April 2002
             May 2003
             June 2003
             July 2003
             September 2003
             October 2003

                               Block J Aircraft***

             November 2003
             February 2004
             March 2004

                               Block K Aircraft***

             March 2004
             April 2004
             May 2004

                               Block L Aircraft***

             October 1999
             November 1999
             December 1999
             June 2000
             July 2000
             September 2000
             October 2000
             November 2000
             December 2000
             January 2001
             February 2001
             July 2001
             November 2001
             July 2003
             August 2003

                               Block T Aircraft***

             November 2001
             February 2002
             May 2004
             June 2004
             July 2004
             August 2004
             September 2004
             November 2004
             December 2004
</Table>

                                       3-4

P.A. No. 1810
K/SWA                                                                      SA-18

<PAGE>

<Table>
<S>                                                    <C>
             January 2005
             February 2005
             March 2005
             April 2005
             May 2005
             June 2005
             July 2005
             August 2005
             September 2005
             October 2005
             November 2005
             December 2005
             February 2006
             May 2006
             June 2006
             July 2006
             August 2006
             September 2006
             November 2006
             December 2006
             January 2007
             February 2007
             March 2007
             April 2007
             May 2007
             June 2007
             July 2007
             August 2007
             September 2007
             October 2007
             November 2007
             December 2007
             January 2008
             February 2008
             March 2008
             April 2008
             May 2008
             June 2008
</Table>

                                       3-5

P.A. No. 1810
K/SWA                                                                      SA-18

<PAGE>

         3.4.2 Adjustment of Advance Payment Base Prices - Long-Lead Aircraft.
For Aircraft scheduled for delivery 36 months or more after the date of this
Agreement, the Advance Payment Base Prices appearing in Article 3.4.1 will be
used to determine the amount of the first advance payment to be made by Buyer on
the Aircraft. No later than 25 months before the scheduled month of delivery of
each affected Aircraft, Boeing will increase or decrease the Advance Payment
Base Price of such Aircraft as required to reflect the effects of (i) any
adjustments in the Aircraft Basic Price pursuant to this Agreement and (ii) the
then-current forecasted escalation factors used by Boeing. Boeing will provide
the adjusted Advance Payment Base Prices for each affected Aircraft to Buyer,
and the advance payment schedule will be considered amended to substitute such
adjusted Advance Payment Base Prices.

                                       3-6

P.A. No. 1810
K/SWA                                                                      SA-18

<PAGE>

Southwest Airlines Co.
6-1162-MSA-185   Page 1

6-1162-MSA-185

Southwest Airlines Co.
P.O. Box 36611 - Love Field
Dallas, Texas 75235

Subject:     Letter Agreement No. 6-1162-MSA-185 to
             Purchase Agreement No. 1810
             Delivery Change Contractual Matters

This Letter Agreement amends Purchase Agreement No. 1810 dated January 19, 1994
(the Agreement) between The Boeing Company (Boeing) and Southwest Airlines Co.
(Buyer) relating to Model 737-7H4 aircraft (the Aircraft).

***

All terms used herein and in the Agreement, and not defined herein, will have
the same meaning as in the Agreement.

1.       ***

2.       ***

         2.1      ***

         2.2      ***

                  ***

3.       ***

         ***

4.       Confidential Treatment.

         Buyer understands that certain commercial and financial information
contained in this Letter Agreement is considered by Boeing as confidential.
Buyer agrees that it will treat this Letter Agreement and the information
contained herein as confidential and will not, without the prior written consent
of Boeing, disclose this Letter Agreement or any information contained herein to
any other person or entity, except as provided in Letter Agreement
6-1162-RLL-934R1.

P.A. No. 1810
K/SWA                                                                      SA-18

<PAGE>

Southwest Airlines Co.
6-1162-MSA-185   Page 2

Very truly yours,

THE BOEING COMPANY

By /s/ MICHAEL S. ANDERSON
  ------------------------------------

Its Attorney-In-Fact
   -----------------------------------

ACCEPTED AND AGREED TO as of this

date: OCTOBER 17, 2001
     -----------

SOUTHWEST AIRLINES CO.

By /s/ LAURA WRIGHT
  ------------------------------------

Its V.P. - FINANCE & TREASURER
   -----------------------------------

P.A. No. 1810
K/SWA                                                                      SA-18

<PAGE>

                          Supplemental Agreement No. 19

                                       to

                           Purchase Agreement No. 1810

                                     between

                               THE BOEING COMPANY

                                       and

                             SOUTHWEST AIRLINES CO.

                    Relating to Boeing Model 737-7H4 Aircraft

         THIS SUPPLEMENTAL AGREEMENT, entered into as of NOVEMBER 7, 2001, by
and between THE BOEING COMPANY, a Delaware corporation with its principal
offices in Seattle, Washington, (Boeing) and SOUTHWEST AIRLINES CO., a Texas
corporation with its principal offices in Dallas, Texas (Buyer);

         WHEREAS, the parties hereto entered into Purchase Agreement No. 1810
dated January 19, 1994, relating to Boeing Model 737-7H4 aircraft (the
Agreement) and;

         WHEREAS, Buyer and Boeing have agreed ***

         WHEREAS, Buyer and Boeing ***

***PURSUANT TO 17 CFR 240.24b-2, CONFIDENTIAL INFORMATION HAS BEEN OMITTED AND
HAS BEEN FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT
TO A CONFIDENTIAL TREATMENT APPLICATION FILED WITH THE COMMISSION.

                                     SA-19-1

P.A. No. 1810
K/SWA

<PAGE>

WHEREAS, Buyer and Boeing have agreed ***

             NOW THEREFORE, in consideration of the mutual covenants herein
contained, the parties agree to amend the Agreement as follows:

1. The Table of Contents of the Agreement is deleted in its entirety and a new
Table of Contents is attached hereto and incorporated into the Agreement by this
reference.

2. Article 2, entitled "Delivery, Title and Risk of Loss," is deleted in its
entirety and replaced by a new Article 2. Such new pages 2-1, 2-2, 2-3 and 2-4
are attached hereto and incorporated into the Agreement by this reference.

3. Article 3, entitled "Price of Aircraft", is deleted in its entirety and
replaced by a new Article 3. Such new pages 3-1, 3-2, 3-3, 3-4, 3-5 and 3-6 are
attached hereto and incorporated into the Agreement by this reference.

4. Letter Agreement No. 6-1162-MSA-185 entitled "Delivery Change Contractual
Matters," is deleted in its entirety and replaced by a new Letter Agreement No.
6-1162-MSA-185R1 which is attached hereto and is incorporated into the Agreement
by this reference.

5. Advance Payment values shall be the same as in effect as of the date of
Supplemental Agreement 18 (October 17, 2001).

The Agreement will be deemed to be supplemented to the extent herein provided
and as so supplemented will continue in full force and effect.

EXECUTED IN DUPLICATE as of the day and year first above written.

THE BOEING COMPANY                           SOUTHWEST AIRLINES CO.

By: /s/ MICHAEL S. ANDERSON                  By: /s/ LAURA WRIGHT
    ---------------------------                  ------------------------------

Its:    Attorney-In-Fact                     Its: VICE-PRESIDENT & TREASURER
     --------------------------                   -----------------------------

                                     SA-19-2

P.A. No. 1810
K/SWA

<PAGE>

                                TABLE OF CONTENTS

<Table>
<Caption>
                                                                                       Page             SA
                                                                                     Number         Number
                                                                                     ------         ------

ARTICLES
--------
<S>                      <C>                                                         <C>            <C>

1.                       Subject Matter of Sale..........................................1-1         SA-13

2.                       Delivery, Title and Risk
                         of Loss.........................................................2-1         SA-19

3.                       Price of Aircraft...............................................3-1         SA-19

4.                       Taxes...........................................................4-1

5.                       Payment.........................................................5-1

6.                       Excusable Delay.................................................6-1

7.                       Changes to the Detail
                         Specification...................................................7-1          SA-1

8.                       Federal Aviation Requirements and
                         Certificates and Export License.................................8-1

9.                       Representatives, Inspection,
                         Flights and Test Data...........................................9-1

10.                      Assignment, Resale or Lease....................................10-1

11.                      Termination for Certain Events.................................11-1

12.                      Product Assurance; Disclaimer and
                         Release; Exclusion of Liabilities;
                         Customer Support; Indemnification
                         and Insurance..................................................12-1

13.                      Buyer Furnished Equipment and
                         Spare Parts....................................................13-1

14.                      Contractual Notices and Requests...............................14-1

15.                      Miscellaneous..................................................15-1
</Table>

                                        i

P.A. No. 1810
K/SWA                                                                      SA-19

<PAGE>

                                TABLE OF CONTENTS

<Table>
<Caption>
                                                                                                SA
                                                                                            Number
                                                                                            ------

EXHIBITS
--------
<S>                                                                                         <C>

A                        Aircraft Configuration                                             SA-13

B                        Product Assurance Document                                         SA-1

C                        Customer Support Document

D                        Price Adjustments Due to
                         Economic Fluctuations - Aircraft                                   SA-13

E                        Buyer Furnished Equipment
                         Provisions Document

F                        Defined Terms Document
</Table>

<Table>
<Caption>
LETTER AGREEMENTS
-----------------
<S>                      <C>

1810-1                   Waiver of Aircraft Demonstration Flight
</Table>

                                       ii

P.A. No. 1810
K/SWA                                                                      SA-19

<PAGE>

                                TABLE OF CONTENTS

<Table>
<Caption>
                                                                                                 SA
                                                                                             Number
                                                                                             ------
RESTRICTED LETTER AGREEMENTS
----------------------------
<S>                           <C>                                                          <C>

6-1162-RLL-932R2               Promotional Support                                           SA-13

6-1162-RLL-933R11              Option Aircraft                                               SA-18

6-1162-RLL-934R3               Disclosure of Confidential                                    SA-14
                               Information

6-1162-RLL-935R1               Performance Guarantees                                        SA-1

6-1162-RLL-936R4               Certain Contractual Matters                                   SA-4

6-1162-RLL-937                 Alternate Advance Payment Schedule

6-1162-RLL-938                 ***

6-1162-RLL-939R1               Certification Flight Test Aircraft                            SA-1

6-1162-RLL-940R1               Training Matters                                              SA-1

6-1162-RLL-941R2               Other Matters                                                 SA-13

6-1162-RLL-942                 Open Configuration Matters

6-1162-RLL-943R1               Substitution Rights                                           SA-6

6-1162-RLL-944                 Airframe Maintenance Material Cost
                               Protection Program

6-1162-RLL-945                 Comparison of 737-7H4 and 737-3H4
                               Block Fuel Burn

6-1162-RLL-1855R3              Additional Contractual Matters                                SA-4

6-1162-RLL-1856                ***                                                           SA-1

6-1162-RLL-1857                Service Ready Validation Program                              SA-1
                               Field Test

6-1162-RLL-1858R1              Escalation Matters                                            SA-4
</Table>

                                       iii

P.A. No. 1810
K/SWA                                                                      SA-19

<PAGE>

                             TABLE OF CONTENTS CON'T

<Table>
<Caption>
                                                                                                 SA
                                                                                             Number
                                                                                             ------
RESTRICTED LETTER AGREEMENTS
----------------------------
<S>                           <C>                                                          <C>

6-1162-RLL-2036                Amortization of Costs for
                               Customer Unique Changes                                       SA-1

6-1162-RLL-2037                Reconciliation of the Aircraft                                SA-1
                               Basic Price

6-1162-RLL-2073                Maintenance Training Matters                                  SA-1

6-1162-KJJ-054                 Business Matters                                              SA-13

6-1162-KJJ-055                 Structural Matters                                            SA-13

6-1162-KJJ-056                 Noise and Emission Matters                                    SA-13

6-1162-KJJ-057                 Product Development Matters                                   SA-13

6-1162-KJJ-058                 Additional Substitution Rights                                SA-13

6-1162-KJJ-150                 Flight Control Computer & Mode                                SA-14
                               Control Panel Spares Matter

6-1162-MSA-185R1               Delivery Change Contractual                                   SA-19
                               Matters
</Table>

                                       iv

P.A. No. 1810
K/SWA                                                                      SA-19

<PAGE>

ARTICLE 2.        Delivery, Title and Risk of Loss.

         2.1 Time of Delivery. The Aircraft will be delivered to Buyer by
Boeing, assembled and ready for flight and Buyer will accept delivery of the
Aircraft, in accordance with the following schedule:

<Table>
<Caption>
             Month and Year
               of Delivery                           Quantity of Aircraft
             --------------                          --------------------
<S>                                                  <C>

                                Block E Aircraft

             December 2000                                    Two (2)
             January 2001                                     One (1)
             February 2001                                    One (1)
             March 2001                                       Two (2)
             June 2001                                        Three (3)
             September 2001                                   Three (1)

                                Block F Aircraft

             October 1998                                     One (1)
             November 1998                                    Two (2)
             December 1998                                    Two (2)

                                Block G Aircraft

             March 1999                                       Two (2)

                                Block H Aircraft

             June 1999                                        Two (2)
             July 1999                                        One (1)
             August 1999                                      One (1)
             September 1999                                   Two (2)
             October 1999                                     One (1)
             March 2000                                       One (1)
             April 2000                                       Two (2)
             September 2000                                   One (1)
             October 2000                                     Two (2)
             March 2001                                       Two (2)
             April 2001                                       One (1)
             October 2001                                     Three (3)

                                Block I Aircraft

             November 2001                                    Two (2)
             December 2001                                    One (1)
             January 2002                                     One (1)
             March 2002                                       Four (4)
             April 2002                                       Two (2)
</Table>

                                       2-1

P.A. No. 1810
K/SWA                                                                      SA-19

<PAGE>

<Table>
<S>                                                  <C>
             May 2003                                         One (1)
             June 2003                                        Two (2)
             July 2003                                        One (1)
             September 2003                                   Two (2)
             October 2003                                     Two (2)

                                Block J Aircraft

             November 2003                                    Two (2)
             February 2004                                    Two (2)
             March 2004                                       One (1)

                                Block K Aircraft

             March 2004                                       One (1)
             April 2004                                       Three (3)
             May 2004                                         One (1)

                                Block L Aircraft

             October 1999                                     One (1)
             November 1999                                    Two (2)
             December 1999                                    One (1)
             June 2000                                        Three (3)
             July 2000                                        Three (3)
             September 2000                                   One (1)
             October 2000                                     One (1)
             November 2000                                    Four (4)
             December 2000                                    One (1)
             January 2001                                     One (1)
             February 2001                                    One (1)
             July 2001                                        One (1)
             September 2001                                   One (1)
             October 2001                                     One (1)
             July 2003                                        One (1)
             August 2003                                      Two (2)

                                Block T Aircraft

             November 2001                                    One (1)
             February 2002                                    One (1)
             May 2004                                         One (1)
             June 2004                                        Four (4)
             July 2004                                        Four (4)
             August 2004                                      Two (2)
             September 2004                                   Two (2)
             November 2004                                    One (1)
             December 2004                                    One (1)
             January 2005                                     Five (5)
             February 2005                                    Two (2)
             March 2005                                       One (1)
             April 2005                                       Two (2)
             May 2005                                         One (1)
</Table>

                                       2-2

P.A. No. 1810
K/SWA                                                                      SA-19

<PAGE>

<Table>
<S>                                                  <C>
             June 2005                                        Three (3)
             July 2005                                        Two (2)
             August 2005                                      One (1)
             September 2005                                   Two (2)
             October 2005                                     One (1)
             November 2005                                    Two (2)
             December 2005                                    Two (2)
             February 2006                                    Four (4)
             May 2006                                         Three (3)
             June 2006                                        Four (4)
             July 2006                                        One (1)
             August 2006                                      Three (3)
             September 2006                                   Three (3)
             November 2006                                    Two (2)
             December 2006                                    Two (2)
             January 2007                                     Two (2)
             February 2007                                    Three (3)
             March 2007                                       Two (2)
             April 2007                                       Two (2)
             May 2007                                         Two (2)
             June 2007                                        Two (2)
             July 2007                                        Two (2)
             August 2007                                      Two (2)
             September 2007                                   Two (2)
             October 2007                                     Two (2)
             November 2007                                    Two (2)
             December 2007                                    Two (2)
             January 2008                                     One (1)
             February 2008                                    One (1)
             March 2008                                       One (1)
             April 2008                                       One (1)
             May 2008                                         One (1)
             June 2008                                        One (1)
</Table>

         2.2 Notice of Target Delivery Date. Boeing will give Buyer notice of
the Target Delivery Date of the Aircraft approximately 30 days prior to the
scheduled month of delivery.

         2.3 Notice of Delivery Date. If Boeing gives Buyer at least 7 days'
notice of the delivery date of the Aircraft, and an Aircraft delivery is delayed
beyond such delivery date due to the responsibility of Buyer, Buyer will
reimburse Boeing for all costs incurred by Boeing as a result of such delay,
including amounts for storage, insurance, Taxes, preservation or protection of
the Aircraft and interest on payments due.

         2.4 Place of Delivery. The Aircraft will be delivered at an airport
facility selected by Boeing in the State of Washington, unless mutually agreed
otherwise.

                                       2-3

P.A. No. 1810
K/SWA                                                                      SA-19

<PAGE>

         2.5 Title and Risk of Loss. Title to and risk of loss of an Aircraft
will pass from Boeing to Buyer upon delivery of such Aircraft, but not prior
thereto.

         2.6 Bill of Sale. Upon delivery of an Aircraft Boeing will deliver to
Buyer a bill of sale conveying good title to such Aircraft, free of all liens,
claims, charges and encumbrances of every kind whatsoever, and such other
appropriate documents of title as Buyer may reasonably request.

                                       2-4

P.A. No. 1810
K/SWA                                                                      SA-19

<PAGE>

ARTICLE 3.        Price of Aircraft.

         3.1 Definitions.

                  3.1.1 Special Features are the features incorporated in
Exhibit A which have been selected by Buyer.

                  3.1.2 Base Aircraft Price is the Aircraft Basic Price
excluding the price of Special Features.

                  3.1.3 Aircraft Basic Price is comprised of the Base Aircraft
Price and the price of the Special Features.

                  3.1.4 Economic Price Adjustment is the adjustment to the
Aircraft Basic Price (Base Aircraft and Special Features) as calculated pursuant
to Exhibit D or Exhibit D-1 as applicable.

                  3.1.5 Aircraft Price is the total amount Buyer is to pay for
the Aircraft at the time of delivery.

         3.2 Aircraft Basic Price.

                  The Aircraft Basic Price for Block A through L Aircraft, is
expressed in July 1992 dollars; the Aircraft Basic Price for Block T Aircraft,
is expressed in July 1999 dollars; as set forth below:

<Table>
<Caption>
                                 Base                            Special                            Aircraft
                                 Aircraft Price                  Features                           Basic Price
<S>                           <C>                                <C>                                <C>
Block A, B, C,
D & E Aircraft                   ***                             ***                                ***
Block F & G                      ***                             ***                                ***
Aircraft
Block H                          ***                             ***                                ***
Aircraft
Block I                          ***                             ***                                ***
Aircraft
Block J                          ***                             ***                                ***
Aircraft
Block K                          ***                             ***                                ***
Aircraft
Block L                          ***                             ***                                ***
Aircraft

Block T                          ***                             ***                                ***
Aircraft
</Table>

                                      15-1

P.A. No. 1810
K/SWA                                                                      SA-19

<PAGE>

         3.3 Aircraft Price. The Aircraft Price will be established at the time
of delivery of such Aircraft to Buyer and will be the sum of:

                  3.3.1 the Aircraft Basic Price, which is ***for the Block A,
B, C, D and E Aircraft, ***for the Block F and G Aircraft*** for the Block H
Aircraft,***) for the Block I Aircraft, ***for the Block J Aircraft, ***for the
Block K Aircraft and ***for the Block L Aircraft; ***for the Block T Aircraft;
plus

                  3.3.2 the Economic Price Adjustments for the Aircraft Basic
Price, as calculated pursuant to the formulas set forth in Exhibit D (Price
Adjustments Due to Economic Fluctuations - Aircraft) for Aircraft Block A
through L, and in Exhibit D-1 (Price Adjustments Due to Economic Fluctuations -
Aircraft) for Aircraft Block T; plus

                  3.3.3 other price adjustments made pursuant to this Agreement
or other written agreements executed by Boeing and Buyer.

         3.4 Advance Payment Base Price.

                  3.4.1 Advance Payment Base Price. For advance payment
purposes, the following estimated delivery prices of the Aircraft (Advance
Payment Base Price) have been established, using currently available forecasts
of the escalation factors used by Boeing as of the date of signing this
Agreement. The Advance Payment Base Price of each Aircraft is set forth below:

<Table>
<Caption>
             Month and Year of                                Advance Payment Base
             Scheduled Delivery                               Price per Aircraft
             ------------------                               --------------------
<S>                                                         <C>

                               Block A Aircraft***

             October 1997
             November 1997

                               Block B Aircraft***

             January 1998
             February 1998
             March 1998
             April 1998
             May 1998
             June 1998                                                 July 1998
             September 1998
</Table>

                                      15-2

P.A. No. 1810
K/SWA                                                                      SA-19

<PAGE>

<Table>
<S>                                                         <C>
                               Block C Aircraft***

             February 1999
             May 1999
             July 1999
             August 1999
             September 1999

                               Block D Aircraft***

             November 1999
             December 1999
             January 2000
             March 2000
             July 2000
             August 2000

                               Block E Aircraft***

             December 2000
             January 2001
             February 2001
             March 2001
             June 2001
             September 2001

                               Block F Aircraft***

             October 1998
             November 1998
             December 1998

                               Block G Aircraft***

             March 1999

                               Block H Aircraft***

             June 1999
             July 1999
             August 1999
             September 1999
             October 1999
             March 2000
             April 2000
             September 2000
             October 2000
             March 2001
             April 2001
             October 2001
</Table>

                                      15-3

P.A. No. 1810
K/SWA                                                                      SA-19

<PAGE>

<Table>
<S>                                                         <C>
                               Block I Aircraft***

             November 2001
             December 2001
             January 2002
             March 2002
             April 2002
             May 2003
             June 2003
             July 2003
             September 2003
             October 2003

                               Block J Aircraft***

             November 2003
             February 2004
             March 2004

                               Block K Aircraft***

             March 2004
             April 2004
             May 2004

                               Block L Aircraft***

             October 1999
             November 1999
             December 1999
             June 2000
             July 2000
             September 2000
             October 2000
             November 2000
             December 2000
             January 2001
             February 2001
             July 2001
             September 2001
             October 2001
             July 2003
             August 2003

                               Block T Aircraft***

             November 2001
             February 2002
             May 2004
             June 2004
             July 2004
             August 2004
             September 2004
</Table>

                                      15-4

P.A. No. 1810
K/SWA                                                                      SA-19

<PAGE>

<Table>
<S>                                                         <C>
             November 2004
             December 2004
             January 2005
             February 2005
             March 2005
             April 2005
             May 2005
             June 2005
             July 2005
             August 2005
             September 2005
             October 2005
             November 2005
             December 2005
             February 2006
             May 2006
             June 2006
             July 2006
             August 2006
             September 2006
             November 2006
             December 2006
             January 2007
             February 2007
             March 2007
             April 2007
             May 2007
             June 2007
             July 2007
             August 2007
             September 2007
             October 2007
             November 2007
             December 2007
             January 2008
             February 2008
             March 2008
             April 2008
             May 2008
             June 2008
</Table>

                                      15-5

P.A. No. 1810
K/SWA                                                                      SA-19

<PAGE>

         3.4.2 Adjustment of Advance Payment Base Prices - Long-Lead Aircraft.
For Aircraft scheduled for delivery 36 months or more after the date of this
Agreement, the Advance Payment Base Prices appearing in Article 3.4.1 will be
used to determine the amount of the first advance payment to be made by Buyer on
the Aircraft. No later than 25 months before the scheduled month of delivery of
each affected Aircraft, Boeing will increase or decrease the Advance Payment
Base Price of such Aircraft as required to reflect the effects of (i) any
adjustments in the Aircraft Basic Price pursuant to this Agreement and (ii) the
then-current forecasted escalation factors used by Boeing. Boeing will provide
the adjusted Advance Payment Base Prices for each affected Aircraft to Buyer,
and the advance payment schedule will be considered amended to substitute such
adjusted Advance Payment Base Prices.

                                      15-6

P.A. No. 1810
K/SWA                                                                      SA-19

<PAGE>

6-1162-MSA-185R1
(there is no original, begins with R1)

Southwest Airlines Co.
P.O. Box 36611 - Love Field
Dallas, Texas 75235

Subject:     Letter Agreement No. 6-1162-MSA-185R1 to
             Purchase Agreement No. 1810
             Delivery Change Contractual Matters

This Letter Agreement amends Purchase Agreement No. 1810 dated January 19, 1994
(the Agreement) between The Boeing Company (Boeing) and Southwest Airlines Co.
(Buyer) relating to Model 737-7H4 aircraft (the Aircraft).

***

All terms used herein and in the Agreement, and not defined herein, will have
the same meaning as in the Agreement.

1.

***

2.       ***

         2.1      ***

         2.2      ***

         2.3      ***

3.       ***

P.A. No. 1810
K/SWA                                                                      SA-19

<PAGE>

Southwest Airlines Co.
6-1162-MSA-185   Page 2

4.       Confidential Treatment.

         Buyer understands that certain commercial and financial information
contained in this Letter Agreement is considered by Boeing as confidential.
Buyer agrees that it will treat this Letter Agreement and the information
contained herein as confidential and will not, without the prior written consent
of Boeing, disclose this Letter Agreement or any information contained herein to
any other person or entity, except as provided in Letter Agreement
6-1162-RLL-934R1.

Very truly yours,

THE BOEING COMPANY

By /s/ MICHAEL S. ANDERSON
  ------------------------------------

Its Attorney In Fact
   -----------------------------------

ACCEPTED AND AGREED TO as of this

date: OCTOBER 17, 2001
     -----------

SOUTHWEST AIRLINES CO.

By /s/ LAURA WRIGHT
  ------------------------------------

Its V.P. - Finance & Treasurer
   -----------------------------------

P.A. No. 1810
K/SWA                                                                      SA-19<PAGE>

                                                                    EXHIBIT 10.2

                     AIRCRAFT ACQUISITION AND SALE AGREEMENT

                          dated as of November 13, 2001

                                      among

                                 THE AMOR TRUST,

                            WILMINGTON TRUST COMPANY,
                                as Owner Trustee

                WELLS FARGO BANK NORTHWEST, NATIONAL ASSOCIATION,
                              as Indenture Trustee

                                       and

                             SOUTHWEST AIRLINES CO.

                                   ----------

                     Nineteen Boeing Model 737-7H4 Aircraft

                                   ----------

*** PURSUANT TO 17 CFR 240.24B--2, CONFIDENTIAL INFORMATION HAS BEEN OMITTED AND
HAS BEEN FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT
TO A CONFIDENTIAL TREATMENT APPLICATION FILED WITH THE COMMISSION.

<PAGE>

                                TABLE OF CONTENTS
                                   (continued)

<Table>
<Caption>

                                                                                                               PAGE
                                                                                                               ----

<S>                                                                                                             <C>
Section 1.            Definitions................................................................................1

Section 2.            Acquisition of the Aircraft by the Trust...................................................4

Section 3.            Sale of the Aircraft to Southwest..........................................................7

Section 4.            Southwest's Representations...............................................................12

Section 5.            Southwest's Covenants.....................................................................16

Section 6.            Repairs and Modification..................................................................18

Section 7.            Miscellaneous.............................................................................18
</Table>

Schedule I       -    Aircraft Economics
Schedule II      -    Aircraft
Exhibit 1        -    Form of Manufacturer's Warranty Bill of Sale
Exhibit 2        -    Form of Acceptance Certificate
Exhibit 3        -    Form of Trust's Warranty Bill of Sale
Exhibit 4        -    Form of Delivery Receipt
Exhibit 5        -    Form of Storage Agreement
Exhibit 6        -    Form of BFE Bill of Sale

                                       i
<PAGE>

         AIRCRAFT ACQUISITION AND SALE AGREEMENT dated as of November 13, 2001
among THE AMOR TRUST, acting through the Owner Trustee (the "TRUST"), WILMINGTON
TRUST COMPANY, not in its individual capacity except as expressly provided
herein but solely as Owner Trustee of the Trust (the "OWNER TRUSTEE"), WELLS
FARGO BANK NORTHWEST, NATIONAL ASSOCIATION, not in its individual capacity but
solely as Indenture Trustee (the "INDENTURE TRUSTEE"), and SOUTHWEST AIRLINES
CO. ("SOUTHWEST").

         WHEREAS the Trust has been organized by the Owner Participant for the
purpose of causing the Trust to purchase and acquire title to the Aircraft from
the Manufacturer, financing the Acquisition Cost and Transaction Costs through
issuance of the Certificates, arranging for storage of the Airframes and the
Engines until the Deferred Delivery Dates and then selling the Aircraft to
Southwest; and

         WHEREAS Southwest consents to the sale of the Aircraft to the Trust
pursuant to the Purchase Agreement Assignment and this Agreement and agrees to
purchase each Aircraft from the Trust on the relevant Deferred Delivery Date for
the relevant Deferred Purchase Price.

         NOW, THEREFORE, the parties to this Agreement hereby agree as follows:

         SECTION 1. Definitions. All terms not otherwise defined in this
Agreement shall have the meanings given such terms by the Certificate Purchase
Agreement and the Indenture. The following terms shall have the meanings set
forth below:

         "ACCELERATED DEFERRED DELIVERY EVENT" shall have the meaning set forth
in Section 3(b) hereof.

         "ACCEPTANCE CERTIFICATE" shall mean, with respect to each Aircraft, an
aircraft receipt in the form set out in Exhibit 2 to this Agreement executed by,
or on behalf of, the Trust.

         "ACQUISITION COST" for any Aircraft shall mean the Purchase Price
Balance for such Aircraft.

         "AIRCRAFT" shall mean each complete aircraft, including related
Engines, listed on Schedule I hereto and referred to in the Purchase Agreement
Assignment and the Purchase Agreement as the Boeing Model 737-7H4 aircraft
required to be manufactured by the Manufacturer and delivered to the Trust or
Southwest, as the case may be, together with any alterations, modifications or
additions permitted by Section 6 hereof.

         "AIRFRAME" shall mean with respect to any Aircraft the airframe and
other equipment and parts required by the Purchase Agreement to be included
therein, exclusive of Engines, together with any alterations, modifications or
additions permitted by Section 6 hereof.

         "AIRLINE PROGRESS PAYMENTS" shall have the meaning specified in Section
3(a)(i)(A).

         "BFE" shall mean, with respect to each Aircraft, the buyer furnished
equipment installed on such Aircraft and listed on Schedule I to the relevant
BFE Bill of Sale.

<PAGE>
                                       [Aircraft Acquisition and Sale Agreement]

         "BDSC" shall mean Boeing Domestic Sales Corporation, a Washington
Corporation.

         "BDSC AIRCRAFT" shall mean the Aircraft bearing manufacturer's serial
number 29818.

         "BFE BILL OF SALE" shall mean, with respect to each Aircraft, a
warranty bill of sale in the form set forth in Exhibit 6 to this Agreement
executed by Southwest in favor of the Trust and covering the BFE relating to
such Aircraft.

         "DEFERRED DELIVERY DATE" with respect to an Aircraft shall mean the
Payment Date falling in the calendar month set opposite such Aircraft in Column
(C) of Schedule I hereto; provided that if any such day is not a Business Day,
such day shall be the next succeeding Business Day in the same calendar month
and, if there is no such day, shall be the next preceding Business Day. The
Deferred Delivery Date for any Aircraft may be accelerated as provided in
Section 3(b) hereof.

         "DEFERRED DELIVERY LOCATION" shall mean the Storage Contractor's
facility in Mojave, California.

         "DEFERRED PURCHASE PRICE" with respect to each Aircraft shall mean the
amount specified in Column (H) of Schedule I hereto with respect to such
Aircraft, which amount shall be (i) reduced, Dollar-for-Dollar, by the amount
that the Purchase Price Balance paid by the Trust for such Aircraft is less than
the Maximum Purchase Price Balance for such Aircraft and (ii) adjusted, if
necessary, pursuant to Section 3(c) hereof.

         "DELIVERY DATE" with respect to an Aircraft shall have the meaning
specified in the Purchase Agreement Assignment.

         "DELIVERY RECEIPT" shall mean, with respect to each Aircraft, a
delivery receipt in the form set forth in Exhibit 4 to this Agreement executed
by Buyer and Seller and covering such Aircraft.

         "ENGINE" shall mean each of the two engines (as such term is defined in
the Purchase Agreement) which the Manufacturer is required under the Purchase
Agreement Assignment and the Purchase Agreement to deliver with respect to each
Aircraft.

         "ERISA" shall mean the Employee Retirement Income Security Act of 1974
as amended from time to time.

         "EXCESS PURCHASE PRICE" with respect to any Aircraft shall mean the
amount by which the Purchase Price Balance for such Aircraft exceeds the Maximum
Purchase Price Balance for such Aircraft.

         "INDENTURE" shall mean the Trust Indenture and Security Agreement dated
as of the date hereof among the Trust, Wilmington Trust Company (in its
individual capacity and as Owner Trustee) and the Indenture Trustee, as the same
may be supplemented, modified or amended from time to time.

                                       2
<PAGE>
                                       [Aircraft Acquisition and Sale Agreement]

         "LUV TRUST" shall mean the special purpose trust formed pursuant to the
Trust Agreement dated as of August 29, 1995 between Spectrum Capital, Ltd. and
Mitsubishi Trust & Banking Corporation (U.S.A.), as Trustee.

         "MANUFACTURER" shall mean The Boeing Company, a Delaware corporation.

         "MANUFACTURER'S BILLS OF SALE" shall mean, with respect to each
Aircraft or Airframe, the Manufacturer's FAA Bill of Sale and the Manufacturer's
Warranty Bill of Sale with respect thereto.

         "MANUFACTURER'S FAA BILL OF SALE" shall mean, with respect to each
Aircraft or Airframe, an AC Form 8050-2 bill of sale executed by the
Manufacturer or, in respect of the BDSC Aircraft, BDSC in favor of the Trust and
covering such Aircraft or Airframe.

         "MANUFACTURER'S WARRANTY BILL OF SALE" shall mean, with respect to each
Aircraft, a full warranty bill of sale in the form set forth in Exhibit 1 to
this Agreement executed by the Manufacturer or, in respect of the BDSC Aircraft,
BDSC in favor of the Trust and covering such Aircraft.

         "MAXIMUM PURCHASE PRICE BALANCE" with respect to any Aircraft shall
mean the amount specified for such Aircraft in Column (G) of Schedule I hereto.

         "OTHER PROGRESS PAYMENTS" with respect to any Aircraft shall mean the
progress or advance payments made by Southwest under the Purchase Agreement and
which are in the amounts specified for such Aircraft in Column (D) of Schedule I
hereto.

         "PLAN" means an employee benefit plan (within the meaning of Section
3(3) of ERISA and including any multiemployer plan within the meaning of Section
3(37)(A) of ERISA) which has been established or maintained or to which
contributions are or have been made, by Southwest or an affiliate in which
Southwest has a beneficial ownership of at least 50 percent.

         "PROGRESS PAYMENTS" with respect to any Aircraft shall mean the
progress or advance payments made by the Luv Trust under the Purchase Agreement
and which are in the amounts specified for such Aircraft in Column (E) of
Schedule I hereto.

         "PURCHASE AGREEMENT" shall mean the Purchase Agreement No. 1810 dated
as of January 19, 1994 between Southwest and the Manufacturer together with all
letter agreements and supplements thereto as in effect on the date hereof, as
the same may be modified, amended or supplemented in accordance with the terms
thereof and, if in respect of the Aircraft, of the Purchase Agreement
Assignment.

         "PURCHASE AGREEMENT ASSIGNMENT" shall mean the Purchase Agreement
Assignment dated as of the date hereof between Southwest and the Trust, as the
same may be modified, amended or supplemented from time to time.

         "PURCHASE AGREEMENT COSTS" shall mean all amounts, costs, indemnities
and obligations under the Purchase Agreement which have been assigned to and
assumed by the Trust pursuant

                                       3
<PAGE>
                                       [Aircraft Acquisition and Sale Agreement]

to the Purchase Agreement Assignment, including any Excess Purchase Price but
excluding any Deferred Purchase Price.

         "PURCHASE PRICE BALANCE" shall have the meaning specified in the
Purchase Agreement Assignment.

         "REIMBURSABLE COSTS" shall mean all costs, expenses, obligations and
liabilities incurred by the Trust or the Trust Estate pursuant to Section 6.05
of the Trust Agreement, Section 8 of the Certificate Purchase Agreement and
Section 8.01 of the Indenture or incurred by the Owner Participant pursuant to
Sections 5.03, 6.07, 7.01 and 7.02 of the Trust Agreement.

         "REQUIRED INSURANCE" shall mean insurance with respect to each Aircraft
meeting the requirements of Section 4.10 of the Indenture.

         "STORAGE AGREEMENT" shall mean the aircraft storage and maintenance
agreement dated as of the date hereof among the Trust, the Storage Contractor
and Southwest substantially in the form of Exhibit 5 hereto.

         "STORAGE CONTRACTOR" shall mean Avtel Services, Inc.

         "SUPPLEMENTAL PROGRESS PAYMENTS" shall mean the payments required to be
made by Southwest under Section 3(a)(i)(C) hereof.

         "TRANSFER TAXES" shall have the meaning specified in Section 3(a)(iii).

         "TRUST'S BILLS OF SALE" shall mean, with respect to each Aircraft, the
Trust's FAA Bill of Sale and the Trust's Special Warranty Bill of Sale with
respect thereto.

         "TRUST'S FAA BILL OF SALE" shall mean, with respect to each Aircraft,
an AC Form 8050-2 bill of sale executed by the Trust in favor of Southwest and
covering such Aircraft.

         "TRUST'S SPECIAL WARRANTY BILL OF SALE" shall mean, with respect to
each Aircraft, a bill of sale in the form set forth in Exhibit 2 to this
Agreement executed by the Trust in favor of Southwest and covering such
Aircraft.

         SECTION 2. Acquisition of the Aircraft by the Trust.

                  (a) (i) (i) Assignment and Sale. Subject to the satisfaction
         of the conditions specified in Sections 4 and 5 of the Certificate
         Purchase Agreement, on the Closing Date, Southwest will assign and sell
         to the Trust its rights under the Purchase Agreement with respect to
         the Aircraft pursuant to the Purchase Agreement Assignment.

                           (ii) Progress Payments. Subject to the satisfaction
         of the conditions specified in Sections 4 and 5 of the Certificate
         Purchase Agreement, as part of the assignment and sale contemplated by
         the preceding clause (i), the Manufacturer will certify the amounts of
         the Progress Payments and Other Progress Payments paid in respect of
         the Aircraft under the Purchase Agreement, the Trust will repay to the
         Luv Trust on the Closing Date the Progress Payments, Southwest will
         assign to the Trust its

                                       4
<PAGE>
                                       [Aircraft Acquisition and Sale Agreement]

         rights in the Other Progress Payments and the Trust will thereupon have
         to its credit under the Purchase Agreement progress payments in like
         amounts in respect of the Aircraft. The payment to the Luv Trust shall
         be made in immediately available funds to the account of Mitsubishi
         Trust & Banking Corporation (U.S.A.) at Bankers Trust, New York, ABA
         number 021001033, Account number 04-164-045, Reference: Luv Trust.

                           (iii) Aircraft and BFE. Subject to satisfaction or
         waiver of the relevant conditions precedent set forth in Section 2(d)
         hereof, the Trust will pay to the Manufacturer or, in respect of the
         BDSC Aircraft, BDSC on the Delivery Date for each Aircraft the
         Acquisition Cost (which shall include any Excess Purchase Price) for
         such Aircraft by wire transfer of immediately available funds to the
         account of the Manufacturer at The Chase Manhattan Bank, New York, New
         York, ABA number 021000021, Account number 910-1-012764, Reference:
         Southwest Airlines. Upon receipt of such payment for any Aircraft, the
         Manufacturer or, in respect of the BDSC Aircraft, BDSC will transfer
         legal and equitable title to such Aircraft to the Trust on the Delivery
         Date therefor (but in no event later than the Commitment Termination
         Date) free and clear of all Liens, and Southwest will transfer legal
         and equitable title to the BFE installed on such Aircraft to the Trust
         on such Delivery Date free and clear of all Liens. Each sale of an
         Aircraft shall be evidenced by (x) the Manufacturer's or, in respect of
         the BDSC Aircraft, BDSC's delivery to the Trust of a Manufacturer's
         Warranty Bill of Sale with respect to such Aircraft and (y) Southwest's
         delivery to the Trust of a BFE Bill of Sale with respect to such
         Aircraft.

                  (b) Acquisition Cost Final. Notwithstanding any provision to
         the contrary contained in the Purchase Agreement or otherwise, the
         Acquisition Cost for each Aircraft shall be final and binding on the
         Manufacturer, BDSC and the Trust. It is intended that the purchase of
         each Aircraft by the Trust shall satisfy all of Southwest's obligations
         to pay the Manufacturer or, in respect of the BDSC Aircraft, BDSC for
         such Aircraft under the Purchase Agreement and the Purchase Agreement
         Assignment.

                  (c) Southwest as Trust's Agent. The Trust hereby appoints
         Southwest to act as its agent (1) to accept physical delivery of each
         Aircraft from the Manufacturer or, in respect of the BDSC Aircraft,
         BDSC on the Delivery Date therefor and to act as the Trust's authorized
         representative in connection therewith, (2) to administer and enforce
         claims which may arise in respect of the exceptions report referred to
         in Section 7(c) hereof and the warranty and support arrangements under
         the Purchase Agreement as assigned pursuant to the Purchase Agreement
         Assignment, (3) to administer and give and receive all notices under
         the Storage Agreement, the Certificate Purchase Agreement and the
         Indenture, (4) to perform the obligations set forth in the Storage
         Agreement, (5) to perform all of the Trust's obligations under Article
         IV of the Indenture and (6) to perform the obligations of the Trust
         under paragraphs 1, 2, 3 and 7 of Section 2(d) hereof. Subject to the
         Granting Clause of the Indenture, the Trust hereby delegates to
         Southwest as its agent the power and the right on behalf of the Trust
         to enforce the obligations of the other parties to the aforesaid
         agreements, to pursue any claims which the Trust may have for any
         payment, reimbursement or indemnity payable to the Trust by any of such
         other parties and to exercise on behalf of the Trust, but subject and
         subordinate the rights

                                       5
<PAGE>
                                       [Aircraft Acquisition and Sale Agreement]

         granted to the Indenture Trustee under the Indenture, the options or
         rights granted to the Trust under the Storage Agreement, Sections 8,
         10, 11 and 12 of the Certificate Purchase Agreement and the definition
         of Permitted Investments in, and Sections 2.11, 2.12, 2.13, 3.07 and
         4.03, of the Indenture. Southwest agrees to perform such services as
         agent at its own cost and expense in view of its prospective purchase
         of the Aircraft pursuant to this Agreement. The appointment of
         Southwest hereunder shall be effective only so long as no Indenture
         Event of Default shall have occurred and be continuing.

                  (d) Conditions Precedent. The obligations of the Trust to take
         the actions required by Section 2(a)(iii) hereof on each Delivery Date
         shall be subject to satisfaction or waiver by the Trust, the Indenture
         Trustee and (so long as there is no Indenture Event of Default
         continuing) Southwest of the following conditions precedent:

                           1. Notice. The Trust shall have delivered to all
         other parties hereto written notice of such Delivery Date at least five
         Business Days prior to such date.

                           2. Inspection. The Trust shall have been afforded the
         opportunity to inspect the Aircraft to be delivered on such Delivery
         Date for a minimum period of 48 hours.

                           3. Acceptance Certificate. After completion of the
         aforesaid inspection, the Trust shall have executed an Acceptance
         Certificate pursuant to the Purchase Agreement acknowledging that the
         Aircraft subject to delivery on such Delivery Date meets the
         specifications set forth in the Purchase Agreement, with any exceptions
         noted, provided that the Trust shall not execute such Acceptance
         Certificate with respect to any Aircraft unless the Loan Participants
         have approved the list of exceptions, if any, noted on such Acceptance
         Certificate.

                           4. Certificate Purchase Agreement Closing. The
         conditions precedent set forth in Sections 4 and 5 of the Certificate
         Purchase Agreement shall have been satisfied or waived to the extent
         that such conditions are required to have been met on such Delivery
         Date.

                           5. Closing Documents. Each party to this Agreement
         shall have received, or waived the right to receive, execution copies
         of all documents, certificates, instruments, and opinions required to
         be delivered to the Loan Participants under the Certificate Purchase
         Agreement, with the exception of the opinion of counsel to the Loan
         Participants.

                           6. Excess Purchase Price. Any Excess Purchase Price
         and Purchase Agreement Costs payable with respect to the Aircraft to be
         delivered on such Delivery Date shall have been paid.

                           7. Resale Certificate. The Trust shall execute and
         deliver to the Manufacturer a resale tax exemption certificate.

                                       6

<PAGE>
                                       [Aircraft Acquisition and Sale Agreement]

         SECTION 3. Sale of the Aircraft to Southwest.

                  (a) Airline Progress Payments; Agreements to Purchase and
         Sell; Supplemental Progress Payments. (i) (A) Airline Progress
         Payments. Southwest hereby irrevocably and unconditionally covenants
         and agrees with the Trust that on each Payment Date it will pay to the
         Trust progress payments in an amount equal to the sum of (x) all
         accrued interest due and payable on the Certificates on such Payment
         Date and (y) all accrued Commitment Fees due and payable on such
         Payment Date (collectively, the "AIRLINE PROGRESS PAYMENTS").

                           (B) Deferred Purchase Prices. Southwest hereby
         irrevocably and unconditionally covenants and agrees with the Trust
         that it will on the Deferred Delivery Date for each Aircraft purchase
         such Aircraft from the Trust on an "as-is, where-is" basis by paying to
         the Trust an amount equal to the Deferred Purchase Price for such
         Aircraft. Subject to the Trust acquiring each Aircraft pursuant to
         Section 2 and Southwest paying the Deferred Purchase Price therefor
         together with any Purchase Agreement Costs or Transfer Taxes then due
         and payable, the Trust hereby covenants and agrees with Southwest that
         it will on the Deferred Delivery Date for each Aircraft transfer,
         convey and sell all of its right, title and interest in and to such
         Aircraft to Southwest on an "as-is, where-is" basis without
         representation or warranty. The Trust will deliver each Aircraft to
         Southwest at the Deferred Delivery Location. In connection with the
         sale of an Aircraft, the Trust shall execute and deliver to Southwest
         at Southwest's expense the Trust Bill of Sale for such Aircraft, and
         Southwest shall execute and deliver to the Trust the Delivery Receipt
         for such Aircraft together with a common carrier tax exemption
         certificate for such Aircraft.

                           (C) Supplemental Progress Payments. Southwest hereby
         irrevocably and unconditionally covenants and agrees with the Trust to
         pay as and when due all Various Amounts, Purchase Agreement Costs,
         Reimbursable Costs and Excess Purchase Price.

                                    (ii) Manner of Making Payments; Payment to
         Indenture Trustee. All payments pursuant to this Agreement shall be
         made, and the obligation in respect thereof shall be discharged, if
         received by the recipient thereof by 11:00 a.m. New York time on the
         date payment is due in Dollars and in immediately available funds (and,
         if received after such time on such date, such payment shall be deemed
         to have been received on the next succeeding Business Day). If any
         Deferred Delivery Date is not a Business Day, then payment shall be due
         on the next succeeding Business Day. At least two Business Days prior
         to each Deferred Delivery Date, the Indenture Trustee on behalf of the
         Trust shall deliver to Southwest an invoice setting forth the amount of
         the Deferred Purchase Price as of such Deferred Delivery Date in
         reasonable detail, which invoice shall be conclusive absent manifest
         error. All payments of Airline Progress Payments, Deferred Purchase
         Price and Supplemental Progress Payments and all other amounts payable
         hereunder shall be paid by Southwest to the Trust at the Owner
         Trustee's office at 1100 North Market Street, Rodney Square North,
         Wilmington, Delaware 19890-0001, Attention: Corporate Trust
         Administration, or as the Trust may otherwise direct from time to time
         in writing; provided, that so long as the Indenture shall not have been
         discharged pursuant to Section 11.01 thereof, the Trust hereby
         irrevocably directs, and

                                       7
<PAGE>
                                       [Aircraft Acquisition and Sale Agreement]

         Southwest agrees, that all payments of Airline Progress Payments,
         Deferred Purchase Price and Supplemental Progress Payments and all
         other amounts payable hereunder shall be paid directly to the Indenture
         Trustee at its office at Wells Fargo Bank Northwest, National
         Association, 79 South Main Street, Salt Lake City, Utah 84111, ABA
         number 121000248, Account number 0510922115, Reference: Southwest
         Airlines Amor Trust, Attention: Corporate Trust Services, or as the
         Indenture Trustee may otherwise direct, at such time so as to be
         received by the Indenture Trustee prior to 11:00 a.m. New York time on
         the date of payment (and, if received after such time on such date,
         such payment shall be deemed to have been received on the next
         succeeding Business Day). Notwithstanding the foregoing, all Excess
         Purchase Price and Purchase Agreement Costs shall be paid by Southwest
         to the Manufacturer or its order. Any amounts payable by Southwest
         under this Section 3(a) not paid when due shall bear interest at the
         Past Due Rate, payable upon demand.

                                    (iii) Transfer Taxes. Southwest shall be
         responsible for and shall indemnify the Trust for, from and against all
         Taxes of any nature levied, assessed, charged or collected in
         connection with the sale and purchase of the Aircraft hereunder and
         under the Purchase Agreement and under the Trust's Bills of Sale and
         the Manufacturer's Bills of Sale (such Taxes are collectively referred
         to herein as "TRANSFER TAXES").

                  (b) Deferred Delivery Dates. The date for the purchase and
         sale of each Aircraft under Section 3(a) hereof shall be the earliest
         of the following:

                           1. The Deferred Delivery Date for such Aircraft;

                           2. The date on which (A) the Allocated Balance of the
         Certificates in respect of any Aircraft becomes due and payable as a
         result of the occurrence of an Event of Loss in respect of such
         Aircraft or (B) the Certificates become due and payable by acceleration
         or otherwise under the Indenture as the result of an Indenture Event of
         Default; provided that Southwest shall have received at least five
         Business Days' prior written notice of such due date in the case of an
         Indenture Event of Default not caused by a breach by Southwest of its
         express obligations under the Operative Agreements or any other event
         involving Southwest which is an Indenture Event of Default; and

                           3. Subject to Section 2.11(b) of the Indenture, the
         date specified by Southwest in a written notice delivered to the
         Indenture Trustee and the Trust at least five Business Days prior to
         such date on which Southwest wishes to purchase such Aircraft pursuant
         to this Agreement in advance of such Aircraft's scheduled Deferred
         Delivery Date (any such acceleration of the Deferred Delivery Date of
         an Aircraft shall be referred to as an "ACCELERATED DEFERRED DELIVERY
         EVENT"); provided that no Accelerated Deferred Delivery Event in
         respect of an Aircraft may occur prior to the Delivery Date for such
         Aircraft.

In the case of Section 3(b)(2)(b) above, if the Delivery Date for any Aircraft
shall not have occurred on or prior to the occurrence of such Indenture Event of
Default, notwithstanding the provisions of such Section, the Trust shall have no
further obligation to purchase such Aircraft

                                       8
<PAGE>

                                       [Aircraft Acquisition and Sale Agreement]

from the Manufacturer under the Purchase Agreement, and Southwest shall have no
further obligation to purchase such Aircraft from the Trust hereunder.

                  (c) Certain Amounts to be Credited. The Deferred Purchase
         Price payable by Southwest for each Aircraft shall be reduced to the
         extent of any of the following:

                           1. In the case of any Aircraft that is subject to an
         Event of Loss, the amount of insurance or condemnation proceeds
         (excluding liability insurance in respect of any Indemnitee) received
         and retained by the Indenture Trustee (as loss payee or as assignee of
         the Trust) or, after the Indenture shall have been discharged, the
         Trust; and

                           2. In the case of the last Aircraft to be purchased
         by Southwest, an amount equal to the amounts on deposit in the
         Collateral Account on the last Deferred Delivery Date.

                  (d) Assignment of Warranties and Other Rights. Effective upon
         the sale of each Aircraft by the Trust to Southwest, the Trust hereby
         assigns, sells, transfers and conveys unto Southwest all claims or
         rights with respect to insurance (other than with respect to liability
         coverage for the Indemnitees), requisition or condemnation proceeds or
         indemnities or claims of any kind against any person relating to such
         Aircraft and all covenants, warranties, service plans, support
         arrangements and other obligations of the Manufacturer and the Engine
         Manufacturer with respect to such Aircraft under this Agreement and the
         Purchase Agreement to the extent the same have been assigned to the
         Trust under the Purchase Agreement Assignment. In consideration for
         such assignment, Southwest hereby accepts its obligations and agrees to
         be bound by the limitations set forth in such covenants, warranties,
         service plans, support arrangements and other obligations of the
         Manufacturer and the Engine Manufacturer. Notwithstanding the
         foregoing, no such assignment shall relieve or diminish the obligation
         of the Manufacturer or the Engine Manufacturer with respect to any
         indemnity or other obligations to the Indemnitees. The Trust further
         agrees that upon the purchase of each Aircraft by Southwest and the
         discharge of the Lien of the Indenture with respect to such Aircraft,
         Southwest shall succeed to all of the Trust's rights with respect to
         such Aircraft as against all of the parties to this Agreement and the
         Certificate Holders under all of the Operative Agreements, and the
         Trust agrees, at Southwest's expense, to execute and deliver any and
         all such further instruments and documents and take such further action
         as Southwest may reasonably request in writing in order to obtain the
         full benefit of this reassignment.

                  (e) Obligations Unconditional. The obligations of Southwest
         under Section 3(a) shall be absolute and unconditional and shall not be
         affected by any fact, circumstance, condition or event whatsoever
         including, without limitation, any of the following:

                           1. The condition or location of any Aircraft,
         Airframe or Engine, any defect in the title thereto or in the
         registration, airworthiness, design, operation or fitness for use of
         any Aircraft or any Engine or any Part or the existence of any Lien
         thereon or any damage to, or loss, theft, taking, requisition,
         condemnation, confiscation, or

                                       9
<PAGE>
                                       [Aircraft Acquisition and Sale Agreement]

         destruction of any Equipment or any inability to deliver possession of
         any Equipment for any reason whatsoever.

                           2. Any failure by the Manufacturer, BDSC, the Engine
         Manufacturer, the Trust, the Trust Company, the Owner Participant, the
         Indenture Trustee or the Storage Contractor to perform any of their
         obligations under this Agreement, the Purchase Agreement, the Purchase
         Agreement Assignment, the Storage Agreement, any other Operative
         Agreement or any other contract.

                           3. The occurrence of any Event of Loss or Indenture
         Default.

                           4. Any insolvency, bankruptcy, reorganization,
         moratorium or similar case or proceeding by or against any party to the
         Operative Agreements.

                           5. Any set-off, counterclaim, recoupment, defense or
         other right which any party to the Operative Agreements may have
         against any other party to the Operative Agreements for any reason
         whatsoever whether arising as the result of the transactions
         contemplated thereby or otherwise.

                           6. Any misrepresentation by any of the parties to the
         Operative Agreements, including without limitation the representations
         of the Trust Company or the Owner Trustee in Section 3(f) hereof.

                           7. Any invalidity or unenforceability or
         disaffirmance of this Agreement or any other Operative Agreement, or
         any provision hereof or thereof, in each case whether against or by
         Southwest or otherwise.

                           8. The inability, for any reason whatsoever, of the
         Trust to deliver the Trust's Bills of Sale referred to in Section 3(a)
         hereof.

                  The obligations of the Trust to sell any Aircraft on the
applicable Deferred Delivery Date shall be conditioned only on the receipt by
the Trust of the Deferred Purchase Price and all other amounts due in respect of
such Aircraft.

                  If for any reason whatsoever this Agreement shall be
terminated in whole or in part by operation of law or otherwise except as
specifically provided herein, Southwest nonetheless agrees to pay an amount
equal to each Airline Progress Payment and Deferred Purchase Price payment at
the time such payment would have become due and payable in accordance with the
terms hereof had this Agreement not been terminated in whole or in part. All
amounts of Airline Progress Payment and Deferred Purchase Price payable by
Southwest shall be paid without notice or demand (except as otherwise expressly
provided) and without abatement, suspension, deferment, deduction, diminution or
proration by reason of any circumstance or occurrence whatsoever. Southwest
hereby waives, to the extent permitted by applicable law, any and all rights
which it may now have or which at any time hereafter may be conferred upon it,
by statute or otherwise, to terminate, cancel, quit or surrender this Agreement
or any part hereof, or to any abatement, suppression, deferment, diminution,
reduction or proration of Airline Progress Payment and Deferred Purchase Price
except in accordance with the express terms hereof. Each payment of Airline
Progress Payment and Deferred Purchase

                                       10
<PAGE>
                                       [Aircraft Acquisition and Sale Agreement]

Price made by Southwest shall be final as to Southwest and the Trust. Southwest
will not seek to recover all or any part of any such payment of Airline Progress
Payment and Deferred Purchase Price for any reason whatsoever. In addition,
except as provided in Section 2(a)(ii) hereof, under no circumstance shall the
Trust (or any assignee thereof) be liable to Southwest for any Progress
Payments, Other Progress Payments or any other advance payments made under the
Purchase Agreement. Southwest covenants that it will remain obligated under this
Agreement in accordance with its terms and will take no action to terminate,
rescind or avoid this Agreement solely as a result of the bankruptcy,
insolvency, reorganization, composition, readjustment, liquidation, dissolution,
winding-up or other similar proceeding affecting the Trust or the Owner
Participant or any other action with respect to this Agreement which may be
taken in any such proceeding by any trustee or receiver of the Trust or the
Owner Participant or by any court.

                  (f) Absence of Warranties. NONE OF THE TRUST, THE OWNER
         TRUSTEE (IN ITS INDIVIDUAL OR ITS TRUST CAPACITY), THE INDENTURE
         TRUSTEE, THE OWNER PARTICIPANT OR ANY LOAN PARTICIPANT MAKES, HAS MADE
         OR SHALL BE DEEMED TO MAKE OR HAVE MADE, AND EACH HAS AND WILL BE
         DEEMED TO HAVE EXPRESSLY DISCLAIMED, ANY REPRESENTATION OR WARRANTY,
         EXPRESS OR IMPLIED, AS TO THE TITLE, AIRWORTHINESS, VALUE, CONDITION,
         DESIGN, OPERATION, MERCHANTABILITY OR FITNESS OR SUITABILITY FOR ANY
         PARTICULAR USE OR PURPOSE OF THE AIRCRAFT OR ANY PART THEREOF, AS TO
         THE ABSENCE OF LATENT OR OTHER DEFECTS, WHETHER OR NOT DISCOVERABLE, AS
         TO THE ABSENCE OF ANY INFRINGEMENT OF ANY PATENT, TRADEMARK OR
         COPYRIGHT, AS TO THE ABSENCE OF ANY OBLIGATIONS BASED ON STRICT
         LIABILITY IN TORT, OR ANY OTHER REPRESENTATION OR WARRANTY WHATSOEVER,
         EXPRESS OR IMPLIED, WITH RESPECT TO THE AIRCRAFT OR ANY PART THEREOF,
         except that the Owner Trustee (in its individual and its trust
         capacity) (A) represents and warrants that on each Delivery Date, the
         Trust shall have received whatever title to any Aircraft as is conveyed
         to it by the Manufacturer, or, in respect of the BDSC Aircraft, BDSC,
         (B) represents and warrants that on each Deferred Delivery Date, the
         Aircraft conveyed to Southwest by the Trust shall be free of Liens
         attributable to the Trust Company in its individual capacity, (C)
         covenants that the Trust Company shall not directly or indirectly
         create, incur, assume or suffer to exist any Lien attributable to it in
         its individual capacity on or with respect to any Aircraft, any
         Airframe or any Engine or any portion of the Trust Estate and that the
         Owner Trustee shall not in its trust capacity create any Lien on any
         Aircraft, Airframe or Engine other than the Lien of the Indenture
         without Southwest's consent and (D) represents and warrants that the
         Trust Company is on the date hereof, and on the Delivery Date it will
         be, a "citizen of the United States" as defined in Section 40102(a)(15)
         of the Federal Aviation Act and the rules and regulations of the FAA
         thereunder, and agrees that if at any time it shall obtain actual
         knowledge that it has ceased to be a "citizen of the United States" as
         defined in Section 40102(a)(15) of the Federal Aviation Act, it shall
         promptly notify Southwest and the Indenture Trustee.

                  (g) No Effect on Other Warranties, etc. None of the provisions
         of Section 3(e) or (f) or any other provision of the Operative
         Agreements shall amend, modify, waive or otherwise affect the
         representations, warranties or other obligations

                                       11
<PAGE>
                                       [Aircraft Acquisition and Sale Agreement]

         (express or implied) of the Manufacturer or the Engine Manufacturer or
         any subcontractor or release the Manufacturer, the Engine Manufacturer
         or any subcontractor from any such representation, warranty or
         obligation.

                  (h) Certain Proceeds to Southwest. Upon the fulfillment by
         Southwest of all of its obligations to purchase the Aircraft pursuant
         to Section 3(a) above and the discharge of the Lien of the Indenture,
         any funds remaining in the Collateral Account and any proceeds of, or
         claims with respect to insurance, liquidated damages, requisition,
         condemnation, indemnities, warranties or other amounts relating to the
         Aircraft (including any obligations of the Manufacturer to bear any
         costs included in the Deferred Purchase Price but excluding insurance
         or indemnity claims in respect of liabilities of any Indemnitee) shall
         belong to Southwest and shall, if held or received by either of them,
         be immediately distributable to Southwest by the Trust and the
         Indenture Trustee.

                  (i) Liquidated Damages. If Southwest shall, for any reason,
         fail to pay in full the Deferred Purchase Price for any Aircraft on any
         Deferred Delivery Date (or, if earlier, the date specified in Section
         3(b) hereof), the Trust shall be entitled to sell or otherwise dispose
         of such Aircraft or any part thereof (including any Engine), at public
         or private sale and with or without notice to Southwest or
         advertisement, as the Owner Trustee may determine, and Southwest shall
         pay to the Trust, on the date of such sale, as liquidated damages for
         loss of a bargain and not as a penalty, an amount equal to the sum of
         (i) the excess, if any, of the Deferred Purchase Price for such
         Aircraft, over the net proceeds of such sale, after deduction of all
         expenses incurred in connection with such sale, plus (ii) interest, to
         the extent permitted by applicable law, at the Past Due Rate on such
         Deferred Purchase Price from such Deferred Delivery Date (or earlier
         such date) to the date of actual payment plus (iii) all Supplemental
         Progress Payments theretofore due and payable.

         SECTION 4. Southwest's Representations. Southwest covenants, represents
and warrants to and with each Certificate Holder, the Owner Participant, the
Trust, the Owner Trustee in its individual capacity and as Owner Trustee, and
the Indenture Trustee, in its individual capacity and as Indenture Trustee, that
on each Delivery Date:

                           (i) Southwest is a corporation duly organized and
         validly existing in good standing under the laws of the State of Texas,
         is a "citizen of the United States" and an "air carrier" within the
         meaning of the Act operating under a certificate issued pursuant to
         Section 401 thereof and of the type referred to in 11 U.S.C. Section
         1110, holds an air carrier operating certificate under the Act, has the
         full power, authority and legal right to own its properties or hold
         such properties under lease and to enter into and perform its
         obligations under each Operative Agreement to which it is a party, in
         accordance with the provisions thereof, and is duly qualified to do
         business as a foreign corporation in good standing in all jurisdictions
         in which the nature of the business conducted by it makes such
         qualification necessary and where failure to so qualify would have a
         material adverse effect on the financial condition of Southwest and its
         subsidiaries taken as a whole;

                                       12
<PAGE>
                                       [Aircraft Acquisition and Sale Agreement]

                           (ii) the execution, delivery and performance by
         Southwest of each Operative Agreement to which it is a party, in
         accordance with the provisions thereof, have been duly authorized by
         all necessary corporate action on the part of Southwest, do not require
         any stockholder approval, or approval or consent of any trustee or
         holder of any indebtedness or obligations of Southwest, and do not and
         will not contravene any law, judgment, governmental rule, regulation or
         order currently in effect or in effect at the time of execution and
         delivery of such document and binding on Southwest or any of its
         subsidiaries or the certificate of incorporation or by-laws of
         Southwest or any of its subsidiaries or contravene the provisions of,
         or constitute a default under, or result in the creation of any Lien
         upon the property of Southwest under, any indenture, mortgage, bank
         credit agreement, note or bond purchase agreement, long-term lease,
         license or other agreement or instrument to which Southwest or any of
         its subsidiaries is a party or by which it or any of its subsidiaries
         may be bound or affected;

                           (iii) neither the execution and delivery by Southwest
         of the Operative Agreements to which it is a party, nor the
         consummation by Southwest of any of the transactions contemplated
         thereby in accordance with the provisions thereof, requires the consent
         or approval of, the giving of notice to, or, except as described in
         clause (vi) of this Section 4, the registration with, or the taking of
         any other action in respect of, the United States Department of
         Transportation, the FAA, the Securities and Exchange Commission or any
         other federal, state or foreign government authority or agency or the
         taking of any other action under any applicable law;

                           (iv) the Operative Agreements to which Southwest is a
         party each constitute legal, valid and binding obligations of Southwest
         enforceable in accordance with the terms hereof and thereof, except as
         such enforceability may be limited by general equitable principles and
         by applicable bankruptcy, insolvency, reorganization, moratorium or
         similar laws affecting creditors' rights generally;

                           (v) the unaudited consolidated balance sheet of
         Southwest and its consolidated subsidiaries as of June 30, 2001, the
         audited consolidated balance sheet of Southwest and its consolidated
         subsidiaries as of December 31, 2000 and the related consolidated
         statements of operations, common stockholders' equity and cash flows
         for the periods then ended (copies of which have been furnished to each
         Loan Participant) have been prepared in accordance with generally
         accepted accounting principles, fairly set forth in all material
         respects the financial position of Southwest and its consolidated
         subsidiaries as of said dates and the results of operations and cash
         flows for such periods; since December 31, 2000, except for matters
         disclosed in the financial statements referred to above or in its
         reports on Forms 8-K and 10-Q delivered prior to the date of this
         Agreement (copies of which have been furnished to each Loan
         Participant), there has been no material adverse change in the
         financial condition of Southwest or its ability to perform its
         obligations under the Operative Agreements;

                           (vi) except for (A) the registration of the Aircraft
         in the name of the Trust pursuant to the Act, (B) the filing for
         recording pursuant to the Act of the Manufacturer's FAA Bills of Sale,
         the Trust Agreement, the Indenture (with the Trust Agreement attached
         as an exhibit) and each Indenture and Trust Agreement Supplement,

                                       13
<PAGE>
                                       [Aircraft Acquisition and Sale Agreement]

         (C) the filing of the financing statements referred to in the
         Certificate Purchase Agreement under the applicable Uniform Commercial
         Code and (D) the taking of possession by the Indenture Trustee of the
         original counterpart of this Agreement, no further action, including
         any filing or recording of any document, is necessary or advisable in
         order to establish and perfect the Trust's title to and interest in any
         Equipment, or to perfect the first mortgage Lien on any Equipment and
         the Indenture Estate in favor of the Indenture Trustee and the
         assignment of this Agreement to the Indenture Trustee pursuant to the
         Indenture in any applicable jurisdiction in the United States;

                           (vii) neither Southwest nor any subsidiary of
         Southwest is an "investment company" or a company "controlled" by an
         "investment company", within the meaning of the Investment Company Act
         of 1940, as amended;

                           (viii) there are no legal or governmental actions,
         suits or proceedings or, to Southwest's knowledge, investigations
         pending to which Southwest is a party or of which any of its property
         is subject other than: (A) as set forth in the financial statements and
         quarterly and annual reports referred to in clause (v) of this Section
         4, or (B) legal or governmental actions, suits or proceedings which
         would not, in Southwest's reasonable opinion, in the aggregate have a
         material adverse effect on the financial condition of Southwest and its
         subsidiaries taken as a whole or Southwest's ability to perform its
         obligations under the Operative Agreements to which it is a party; and
         no such actions, suits or proceedings are known by Southwest to be
         threatened or contemplated by government authorities or threatened by
         others;

                           (ix) none of the transactions contemplated by the
         Operative Agreements (including, without limitation, the use of the
         proceeds from the issuance of the Certificates) will violate or result
         in a violation of Section 7 of the Securities Exchange Act of 1934, as
         amended, or any regulations issued pursuant thereto, including, without
         limitation, Regulations G, T and X of the Board of Governors of the
         Federal Reserve System, and none of the proceeds from the sale of the
         Certificates will be used, directly or indirectly, to purchase, or to
         refinance any borrowing, the proceeds of which were used to purchase,
         any "security" within the meaning of said Securities Exchange Act;

                           (x) Southwest is not in default in the performance of
         any term or condition of the Purchase Agreement;

                           (xi) no governmental approval of any kind is required
         of the Owner Participant, the Trust Company, the Loan Participants, the
         Trust or the Indenture Trustee for their respective execution and
         delivery of or performance under the Operative Agreements by reason of
         any fact or circumstance of Southwest, the nature of the Aircraft or
         Southwest's, the Trust's or the Manufacturer's proposed operations or
         use of the Aircraft;

                                       14
<PAGE>
                                       [Aircraft Acquisition and Sale Agreement]

                           (xii) on each Delivery Date and each Deferred
         Delivery Date, all Transfer Taxes then due with respect to the relevant
         Aircraft then being transferred have been paid;

                           (xiii) Southwest has filed all income tax returns
         which are required to be filed, and has paid all taxes due and payable
         and all tax assessments received by it, except for taxes: (A) being
         contested in good faith by appropriate proceedings for which adequate
         reserves have been recorded in Southwest's books in accordance with
         generally accepted accounting principles as reasonably determined by
         Southwest and its accountants in good faith; or (B) the nonpayment of
         which would not have a material adverse effect on the financial
         condition of Southwest and its subsidiaries taken as a whole;

                           (xiv) assuming the truth of the representations
         contained in Section 6(e) of the Certificate Purchase Agreement,
         Southwest has not engaged in any transaction in connection with which
         Southwest could be subjected to either a material civil penalty
         assessed pursuant to Section 502(i) of ERISA, or a material tax imposed
         by Section 4975 of the Code; no material liability to the Pension
         Benefit Guaranty Corporation has been incurred by Southwest with
         respect to any Plan; there has been no event or condition which
         presents a material risk of termination by the Pension Benefit Guaranty
         Corporation of any Plan currently maintained or contributed to by
         Southwest or any affiliate; Southwest and each affiliate has fulfilled
         its obligations under the minimum funding standards of ERISA and the
         Internal Revenue Code with respect to each Plan; neither Southwest nor
         any affiliate has sought a waiver of the minimum funding standard under
         Section 412 of the Internal Revenue Code in respect of any Plan; no
         material amount of "withdrawal liability" as that term is used in
         Section 4201 of ERISA, has been or is expected to be incurred by
         Southwest nor has Southwest or any affiliate of Southwest been notified
         by any multiemployer Plan that such multiemployer Plan is in
         reorganization or insolvency within the meaning of Section 4241 or
         Section 4245 of ERISA or that such multiemployer Plan intends to
         terminate or has been terminated under Section 4041A of ERISA;

                           (xv) there are no broker's or underwriter's fees
         payable in connection with the transactions contemplated in the
         Operative Agreements other than as specified in the Certificate
         Purchase Agreement;

                           (xvi) Southwest and its authorized agents have not
         offered Certificates or beneficial interests in the Trust Estate for
         sale by means of any form of general solicitation or general
         advertising, and have not offered to sell (A) the Certificates to any
         persons other than the Loan Participants and not more than 50 other
         institutional investors, each of whom was offered a portion thereof at
         a private sale for investment or (B) beneficial interests in the Trust
         Estate to any persons other than the Owner Participant; and in the case
         of each offering by Southwest and its authorized agents, Certificates
         and beneficial interests in the Trust Estate have been offered solely
         as bank loans in the ordinary course of business or for investment and
         not for resale or distribution and the offeree has been a person
         considered to have such knowledge and experience in financial and
         business matters as to be capable of evaluating the merits and

                                       15
<PAGE>
                                       [Aircraft Acquisition and Sale Agreement]

         to have such financial position as to be capable of bearing the risks
         of an investment in the Certificates and beneficial interests in the
         Trust Estate; Southwest agrees that it has not offered, and neither it
         nor any authorized person acting on its behalf will hereafter offer,
         any of the Certificates or the beneficial interests in the Trust Estate
         for sale to, or solicit any offers to buy any of the Certificates or
         the beneficial interests in the Trust Estate from, or otherwise
         approach or negotiate in respect thereof with, any person or persons
         whomsoever, so as thereby to result in the making and delivery of the
         Certificates or the creation and distribution of the beneficial
         interests in the Trust Estate being in violation of the provisions of
         Section 5 of the Securities Act of 1933, as amended; as used in this
         subparagraph, the term the "Certificates" means the Certificates
         initially to be delivered to the Loan Participants or any similar
         security or securities;

                           (xvii) Southwest has delivered to special New York
         counsel to the Loan Participants a true, correct and complete copy of
         the Purchase Agreement with respect to the Aircraft; and

                           (xviii) there stands to the credit for the Aircraft
         Price (as defined in the Purchase Agreement) of each Aircraft under the
         Purchase Agreement the Progress Payments and the Other Progress
         Payments specified for such Aircraft in Schedule I hereto.

         SECTION 5. Southwest's Covenants. Southwest covenants and agrees as
follows (which agreements shall be performed at Southwest's cost and expense):

                           (i) Southwest will cause to be done, executed,
         acknowledged and delivered each and every further act, conveyance and
         assurance as the Trust, the Indenture Trustee or any Certificate Holder
         shall reasonably require for accomplishing the purposes of the
         Operative Agreements. Southwest, forthwith upon delivery of each
         Aircraft or Airframe to the Trust, shall cause such Aircraft or
         Airframe to be duly registered, and at all times thereafter to remain
         duly registered, under the Act in the name of the Trust, shall promptly
         take such action with respect to the recording, filing, rerecording and
         refiling of the Trust Agreement and the Indenture and the supplements
         thereto as is necessary to maintain the interests and rights of the
         Trust in and to the Aircraft and the perfection of the security
         interests created by the Indenture and shall furnish to the Trust such
         information (other than information which the Manufacturer has agreed
         to provide and other than with respect to the citizenship of the Owner
         Participant and the Trust) as may be required or desirable to enable
         the Trust to make application for such registration under the Act, and
         shall promptly furnish to the Trust such information (other than
         information which the Manufacturer has agreed to provide and other than
         with respect to the citizenship of the Trust) as may be required to
         enable the Trust timely to file any reports required or desirable to be
         filed by it with any governmental authority because of the Trust's
         ownership of the Aircraft.

                           (ii) Southwest will cause each Manufacturer's FAA
         Bill of Sale, each affidavit of citizenship, the Trust Agreement, the
         Indenture and each Indenture and Trust Agreement Supplement to be
         promptly filed and recorded or filed for recording, to the extent
         required or permitted under the Act, or required under any other

                                       16
<PAGE>
                                       [Aircraft Acquisition and Sale Agreement]

         applicable law. The following documents shall be filed for recording
         with the FAA on the Delivery Date in the following order of priority:
         first, on the Closing Date, the Trust Agreement, second, the
         Manufacturer's FAA Bill of Sale for the Airframe delivered on such
         Delivery Date and third, the Indenture (filed on the Closing Date) and
         the Indenture and Trust Agreement Supplement with respect to such
         Airframe, to be effected by so filing the Indenture with the Trust
         Agreement and the Indenture and Trust Agreement Supplement attached as
         exhibits thereto. Southwest upon request shall provide photocopies of
         file stamped copies of documents filed and recorded with the FAA.

                           (iii) Southwest shall at all times maintain its
         corporate existence. Southwest will do or cause to be done all things
         necessary to preserve and keep in full force and effect its rights
         (charter and statutory) and franchises; provided, however, that
         Southwest shall not be required to preserve any right or franchise if
         Southwest shall reasonably determine that the loss thereof will not
         materially adversely affect Southwest's business or financial condition
         or Southwest's ability to perform its obligations under the Operative
         Agreements.

                           (iv) Southwest also agrees to furnish following the
         date of this Agreement to the Trust, the Owner Participant, each
         Certificate Holder and the Indenture Trustee (A) within two months
         after the end of the first, second and third quarterly accounting
         periods in each fiscal year of Southwest, a consolidated balance sheet
         of Southwest and its consolidated subsidiaries prepared by it as of the
         close of the accounting period then ended, together with the related
         consolidated statements of operations, common stockholders' equity and
         cash flows for the quarter then ended and reinvested earnings for such
         accounting period certified by the Treasurer, the chief accounting
         officer or a financial vice president of Southwest, (B) within three
         months after the close of each fiscal year of Southwest, a consolidated
         balance sheet of Southwest as of the close of such fiscal year and the
         related consolidated statements of operations, common stockholders'
         equity and cash flows and reinvested earnings for the fiscal year then
         ended as prepared and certified by nationally recognized certified
         public accountants, including their opinion, (C) promptly upon
         transmission thereof, copies of all regular and periodic reports
         furnished by Southwest to its stockholders, (D) promptly after filing
         with the Securities and Exchange Commission, copies of Southwest's
         annual reports on Form 10-K (including all corresponding annual reports
         to shareholders), quarterly reports on Form 10-Q and current reports on
         Form 8-K, including any amendments of such reports, (v) immediate
         telephonic advice after Southwest obtains knowledge that there has
         occurred an Event of Loss or that there exists an Indenture Event of
         Default, confirmed promptly by an officer's certificate describing such
         default in reasonable detail, and (vi) from time to time such other
         information as the Trust, any Certificate Holder or the Indenture
         Trustee may reasonably request. Southwest's obligations pursuant to
         clauses (A) and (B) of the foregoing sentence may be satisfied by
         furnishing to the Trust and the Indenture Trustee the reports on Forms
         10-K and 10-Q in accordance with clause (D) of the foregoing sentence.

                           (v) Southwest will not directly or indirectly create,
         incur, or suffer to exist any Lien on or with respect to any Aircraft,
         any Airframe or any Engine or the Trust's title thereto or any other
         part of the Trust Estate except Permitted

                                       17
<PAGE>
                                       [Aircraft Acquisition and Sale Agreement]

         Encumbrances. Southwest will promptly, at its own expense, take or
         cause to be taken such action as may be necessary to discharge any Lien
         which is prohibited by this paragraph (v).

                           (vi) Southwest will not carry or otherwise maintain
         insurance in respect of any Aircraft other than in the manner set forth
         in Section 4.10(d) of the Indenture.

                           (vii) Southwest agrees to duly and punctually
         perform, or shall ensure that the Trust duly and punctually performs,
         all of the Trust's obligations under Article IV of the Indenture.

         SECTION 6. Repairs and Modification. From the Delivery Date through the
Deferred Delivery Date for each Aircraft, Southwest shall be allowed to make any
repairs to or modifications of the Aircraft required by the FAA or under the
warranties and support arrangements contained in the Purchase Agreement or, so
long as no Indenture Event of Default is continuing, as are desired by Southwest
as preservice modifications. Such repairs and modifications shall be effected in
a manner which conforms to the requirements of the Indenture. Repairs and
modifications required by the FAA or desired by Southwest shall be performed by
the Storage Contractor or Southwest and shall be at the sole cost and expense of
Southwest.

         SECTION 7. Miscellaneous.

                  (a) Governing Law. THIS AGREEMENT IS BEING DELIVERED IN THE
         STATE OF NEW YORK AND SHALL IN ALL RESPECTS BE GOVERNED BY, AND
         CONSTRUED IN ACCORDANCE WITH, THE LAWS OF THE STATE OF NEW YORK,
         INCLUDING ALL MATTERS OF CONSTRUCTION, VALIDITY AND PERFORMANCE.

                  (b) Counterparts; Amendments; Successors and Assigns. This
         Agreement may be executed in any number of counterparts, all of which
         taken together shall constitute one and the same instrument, and any of
         the parties hereto may execute this Agreement by signing any such
         counterpart. This Agreement may be terminated, amended, supplemented,
         waived or modified only by an instrument in writing signed by all of
         the parties hereto. So long as no Indenture Event of Default shall have
         occurred and be continuing, the Trust shall not enter into any
         amendment to any Operative Agreement without Southwest's prior written
         consent (which consent shall not be unreasonably withheld or delayed).
         The terms of this Agreement shall be binding upon and shall inure to
         the benefit of each of the parties to this Agreement and their
         successors and assigns.

                  (c) Assignment to Indenture Trustee. The parties to this
         Agreement acknowledge that all of the Trust's rights and interests
         under this Agreement and the other Indenture Documents (including,
         without limitation, all rights of the Trust to execute any election or
         option, to give any notice, consent, waiver or approvals or to enforce
         any right or remedy) have been assigned and transferred to the
         Indenture Trustee pursuant to the Indenture as security for the
         Certificates and the other obligations of the

                                       18
<PAGE>
                                       [Aircraft Acquisition and Sale Agreement]

         Trust to the Indenture Trustee and the holders under the Operative
         Agreements and, so long as the Lien of the Indenture remains in effect,
         all rights and remedies of the Trust hereunder and under the other
         Indenture Documents shall be exercised exclusively by the Indenture
         Trustee without the consent of the Trust. Each party hereto consents to
         the foregoing assignment and transfer and acknowledges receipt of a
         copy of Indenture and all of the terms thereof. All notices and other
         communications to the Trust hereunder, and under the other Indenture
         documents shall be copied to the Indenture Trustee.

                  (d) Trust Capacity. The Owner Trustee is executing this
         Agreement on behalf of the Trust solely as trustee under the Trust
         Agreement, except as expressly provided herein, and the Indenture
         Trustee is entering into this Agreement solely as trustee as provided
         in the Indenture and, except as expressly provided herein, not in its
         individual capacity, and, except as expressly provided herein, in no
         case whatsoever shall either of them be liable in its individual
         capacity for any of the statements, representations, warranties,
         agreements or obligations of the Trust or the Indenture Trustee, as the
         case may be, hereunder or for any loss in respect thereof, as to all of
         which the parties agree to look solely to the Trust Estate and the
         Indenture Estate respectively; provided, however, that the Owner
         Trustee and the Indenture Trustee in their respective individual
         capacities shall be liable hereunder for gross negligence or willful
         misconduct. The Trust Company in its individual capacity hereby
         covenants to Southwest that it will promptly remove any Owner's Liens
         on the Trust Estate arising by, through or under the Trust Company.

                  (e) Notices. Unless otherwise specifically provided herein,
         all notices required or permitted by the terms hereof or the other
         Operative Agreements shall be in writing and shall be delivered
         personally, sent by overnight express, or, if promptly confirmed as
         provided above, dispatched by telegram, telex or other written (i) if
         to the Indenture Trustee, addressed to it at its office at 79 South
         Main Street, Salt Lake City, Utah 84111, Attention: Corporate Trust
         Services (telecopy: (801) 246-5053), (ii) if to the Owner Trustee, the
         Trust or the Trust Company, addressed to it at its office at 1100 North
         Market Street, Rodney Square North, Wilmington, Delaware 19890,
         Attention: Corporate Trust Department (telecopy: (302) 651-1576), or
         (iii) if to Southwest, addressed to it at its office at 2702 Love Field
         Drive, Dallas Texas 75235, Attention: Vice President and Treasurer
         (telecopy: (214) 792-4022).

                  (f) Consent to Jurisdiction. Any legal action or proceeding
         arising out of or relating to this Agreement or any other Operative
         Agreement may be instituted in the United States in the courts of the
         United States for the Southern District of New York (or, absent
         jurisdiction in such Federal courts, in the courts of the State of New
         York located in New York, New York), and each of the Trust, the Owner
         Trustee, the Indenture Trustee and Southwest, in respect of itself and
         its properties and revenues, irrevocably submits to the jurisdiction of
         these courts in any such action or proceeding. Each of the Trust, the
         Owner Trustee, the Indenture Trustee and Southwest agrees that final
         judgment against it in any legal action or proceeding arising out of or
         relating to this Agreement or any other Operative Agreement shall be
         conclusive and may be enforced in any other jurisdiction within or
         outside the United States by suit on the judgment, a certified or
         exemplified copy of which judgment shall be conclusive evidence thereof
         and of the amount of its indebtedness, or by such other means provided
         by law.

                                       19
<PAGE>
                                       [Aircraft Acquisition and Sale Agreement]

         EACH PARTY HERETO WAIVES ANY RIGHT IT MAY HAVE TO A JURY TRIAL IN ANY
         PROCEEDING REFERRED TO ABOVE. The agreement set forth in this Section
         7(f) is given solely for the benefit of the parties hereto and such
         agreement is not intended to and shall not inure to the benefit of any
         other Person.

                                      * * *

                                       20
<PAGE>
                                       [Aircraft Acquisition and Sale Agreement]

         IN WITNESS WHEREOF, the parties hereto have caused this Aircraft
Acquisition and Sale Agreement to be duly executed by their respective officers
thereunto duly authorized as of the day and year first above written.

                                   THE AMOR TRUST, by Wilmington Trust
                                   Company, not in its individual capacity,
                                   but solely as Owner Trustee

                                   By:   /s/ W. CHRIS SPONENBERG
                                       -----------------------------------------
                                        Title: VICE PRESIDENT

                                   WILMINGTON TRUST COMPANY, not in its
                                   individual capacity, but solely as Owner
                                   Trustee

                                   By:    /s/ W. CHRIS SPONENBERG
                                       -----------------------------------------
                                        Title: VICE PRESIDENT

                                   WELLS FARGO BANK NORTHWEST NATIONAL
                                   ASSOCIATION,
                                        as Indenture Trustee

                                   By:   /s/ C. SCOTT NIELSEN
                                       -----------------------------------------
                                        Title:  VICE PRESIDENT

                                   SOUTHWEST AIRLINES CO.

                                   By:  /s/ LAURA WRIGHT
                                       -----------------------------------------
                                        Title:  VP FINANCE & TREASURER

                                       21
<PAGE>

                                       [Aircraft Acquisition and Sale Agreement]

                                    EXHIBIT 1

                                  BILL OF SALE

         KNOW ALL MEN BY THESE PRESENTS:

         THAT [THE BOEING COMPANY/BOEING DOMESTIC SALES CORPORATION] (SELLER), a
Delaware corporation, is the owner of the full legal and beneficial title to
that certain Boeing Model 737-7H4 aircraft manufactured by The Boeing Company
bearing Federal Aviation Administration Registration Identification Number
N_____ and manufacturer's serial number _____, together with two (2) CFM
International CFM56-7 engines installed thereon manufactured by CFM
International, Inc. bearing manufacturer's serial numbers _____ and _____,
respectively, together with all appliances, parts, instruments, appurtenances,
accessories, furnishings, or other equipment or property installed on or
attached to said aircraft and engines, other than Buyer Furnished Equipment
(BFE).

         THAT for and in consideration of the sum of $1.00 and other valuable
consideration SELLER does this ___ day of __________, 200_, grant, convey,
transfer, bargain and sell, deliver, assign and set over pursuant and subject to
the terms and conditions of Purchase Agreement No. 1810, dated January 19, 1994,
all of SELLER's right, title and interest in and to the above described
aircraft, engines, appliances, parts, instruments, appurtenances, accessories,
furnishings and/or other equipment or property (other than BFE) to THE AMOR
TRUST (BUYER), a Delaware Business Trust formed pursuant to the Trust Agreement
dated as of November 13, 2001, between Wilmington Trust Company and Amor
Aircraft Corporation, as Owner Participant, and unto its successors and assigns
forever.

         THAT SELLER hereby warrants to BUYER, its successors and assigns, that
there is hereby conveyed to BUYER on the date hereof, good, marketable and
sufficient legal and beneficial title to the aforesaid aircraft, engines,
appliances, parts, instruments, appurtenances, accessories, furnishings and/or
other equipment or property (other than BFE), free and clear of all liens,
encumbrances and rights of others, and that it will warrant and defend such
title forever against all claims and demands whatsoever.

         THIS BILL OF SALE IS DELIVERED BY SELLER TO BUYER IN, AND GOVERNED BY
THE LAW OF, THE STATE OF WASHINGTON.

         IN WITNESS WHEREOF, Seller has caused this Bill of Sale to be executed
this _____ day of _________, 200_.

                                              [THE BOEING COMPANY/BOEING
                                              DOMESTIC SALES CORPORATION]

                                              By:
                                                  ------------------------------
                                                  Title:

                                    EXHIBIT 1
                                     Page 1

<PAGE>

                                       [Aircraft Acquisition and Sale Agreement]

                                    EXHIBIT 2

                             ACCEPTANCE CERTIFICATE

                                    EXHIBIT 2
                                     Page 1

<PAGE>

                                       [Aircraft Acquisition and Sale Agreement]

                                    EXHIBIT 3

                                  BILL OF SALE

         KNOW ALL MEN BY THESE PRESENTS:

         THAT THE AMOR TRUST (SELLER), a Delaware Business Trust formed pursuant
to the Trust Agreement dated November 13, 2001, between the Wilmington Trust
Company and Amor Aircraft Corporation, as Owner Participant, received on
__________ __, 200_ (i) a Bill of Sale from The Boeing Company with respect to
that certain Boeing Model 737-7H4 aircraft bearing Federal Aviation
Administration Registration Identification Number N_____ and manufacturer's
serial number _____, together with two (2) CFM International CFM56-7 engines
installed thereon bearing manufacturer's serial numbers _____ and _____,
respectively, together with all appliances, parts, instruments, appurtenances,
accessories, furnishings, or other equipment or property installed on or
attached to said aircraft and engines and (ii) a BFE Bill of Sale from Southwest
Airlines Co. with respect to certain Buyer Furnished Equipment (BFE).

         THAT for and in consideration of the sum of $1.00 and other valuable
consideration SELLER does this ____ day of ___, 200_, grant, convey, transfer,
bargain and sell, deliver, assign and set over all of SELLER's right, title and
interest in and to the above described aircraft, engines, appliances, parts,
instruments, appurtenances, accessories, furnishings, BFE and/or other equipment
or property to SOUTHWEST AIRLINES CO. (BUYER), it being understood and agreed
that SELLER is hereby conveying to BUYER all of the right, title and interest
conveyed to it by [The Boeing Company/Boeing Domestic Sales Corporation] and
BUYER, if any, but without representation or warranty of any kind whatsoever.

         THIS BILL OF SALE IS DELIVERED BY SELLER TO BUYER IN, AND GOVERNED BY
THE LAW OF, THE STATE OF CALIFORNIA.

         IN WITNESS WHEREOF, Seller has caused this Bill of Sale to be executed
this ____ day of ___, 200__.

                                      THE AMOR TRUST, by Wilmington Trust
                                      Company, not in its individual
                                      capacity, but solely as Owner Trustee

                                      By:
                                          -------------------------------------
                                          Title:

                                    EXHIBIT 3
                                     Page 1

<PAGE>

                                       [Aircraft Acquisition and Sale Agreement]

                                    EXHIBIT 4

                                DELIVERY RECEIPT

         SOUTHWEST AIRLINES CO. hereby accepts and acknowledges receipt from THE
AMOR TRUST in accordance with the terms and conditions of the Aircraft
Acquisition and Sale Agreement dated as of November 13, 2001 between the parties
thereto of one Boeing Model 737-7H4 aircraft bearing manufacturer's serial
number ______, together with two (2) CFM International CFM56-7 engines installed
thereon bearing manufacturer's serial numbers ______ and _____ in Mojave,
California, on [date] at ____ [a.m./p.m. (PST/PDT)].

SOUTHWEST AIRLINES CO.,
     as Buyer

By:
    -----------------------------
     Title:

THE AMOR  TRUST,
by Wilmington Trust Company,
not in its individual capacity but solely as Owner
Trustee,
     as Seller

By:
    -----------------------------
     Title:

                                   EXHIBIT 5
                                     Page 1
<PAGE>

AIRCRAFT STORAGE AND MAINTENANCE  AGREEMENT
AVTEL Services, Inc. and The Amor Trust and Southwest Airlines Co.
--------------------------------------------------------------------------------

                                    EXHIBIT 5

                                STORAGE AGREEMENT

--------------------------------------------------------------------------------

                        AIRCRAFT STORAGE AND MAINTENANCE

                                    AGREEMENT

                                    #01-0280

--------------------------------------------------------------------------------

                                 BY AND BETWEEN

                              AVTEL SERVICES, INC.

                                       AND

                                 THE AMOR TRUST

                                       AND

                             SOUTHWEST AIRLINES CO.

                                   DATED AS OF

                                NOVEMBER 13, 2001

                        FAA REPAIR STATION NO.: LVTR751K

                                   EXHIBIT 5

<PAGE>
AIRCRAFT STORAGE AND MAINTENANCE  AGREEMENT
AVTEL Services, Inc. and The Amor Trust and Southwest Airlines Co.
--------------------------------------------------------------------------------

TABLE OF CONTENTS

<Table>
<Caption>

Section                                                                                                        Page
-------                                                                                                        ----
<S>                                                                                                            <C>
                  INTRODUCTION....................................................................................1

ARTICLE 1:        SCOPE OF AGREEMENT..............................................................................1

ARTICLE 2:        TERM OF AGREEMENT...............................................................................2

ARTICLE 3:        STANDARD OF SERVICE.............................................................................2

ARTICLE 4:        CUSTOMER FURNISHED DATA.........................................................................3

ARTICLE 5:        REPRESENTATION..................................................................................3

ARTICLE 6:        DELIVERY........................................................................................4

ARTICLE 7:        REDELIVERY......................................................................................4

ARTICLE 8:        FLIGHT OPERATIONS...............................................................................5

ARTICLE 9:        EXCUSABLE DELAYS................................................................................5

ARTICLE 10:       INSURANCE AND INDEMNIFICATION...................................................................5

ARTICLE 11:       WARRANTY........................................................................................6

ARTICLE 12:       PAYMENT.........................................................................................7

ARTICLE 13:       MISCELLANEOUS...................................................................................9
</Table>

<Table>
<Caption>

Appendix                                                                                                       Page
--------                                                                                                       ----
<S>                                                                                                            <C>

       A:         STATEMENT OF WORK.............................................................................A-1

       B:         RATES / TERMS AND CONDITIONS..................................................................B-1

       C:         FORM OF WORK ORDER REQUEST....................................................................C-1

       D:         FORM OF REDELIVERY NOTICE.....................................................................D-1
</Table>

                                   EXHIBIT 5
<PAGE>

AIRCRAFT STORAGE AND MAINTENANCE AGREEMENT
     AVTEL Services, Inc. and The Amor Trust and Southwest Airlines Co.
--------------------------------------------------------------------------------

INTRODUCTION

This Agreement, dated as of November 13, 2001 and between AVTEL Services, Inc.,
hereinafter referred to as "AVTEL", The Amor Trust, acting through Wilmington
Trust Company, not in its individual capacity but solely as Owner Trustee,
hereinafter referred to as "Owner/Operator" and Southwest Airlines Co.,
hereinafter referred to as "Southwest".

Whereas, AVTEL is an FAA-approved Repair Station #LVTR751K, which maintains and
operates certain facilities located at the East Kern County Airport (Mojave
Airport), Mojave, California, (hereinafter referred to as "Facility") for the
maintenance, modification, repair, overhaul, storage, and functional testing of
aircraft, parts, and components; and

Whereas, the Owner/Operator desires to enter into an agreement with AVTEL for
the maintenance and/or storage of certain B-737-600/700/800/900 aircraft which
together with the engines, components, aircraft historical records, parts and
equipment installed thereon, including any replacements, or substitutions
therefore, are singularly and collectively referred to herein as the "Aircraft";
and

Whereas, AVTEL is willing to perform such services for the Owner/Operator
pursuant to the RATES, TERMS AND CONDITIONS hereinafter described and as set
forth in Appendix B attached hereto:

Now, therefore, in consideration of the stated premise and the mutual covenants
herein contained, the parties hereto agree as follows:

ARTICLE 1. SCOPE OF AGREEMENT

AVTEL shall perform certain storage services (the "Basic Services") for
Owner/Operator as specified in writing by the Owner/Operator and stated in
Appendix A hereto.

Any maintenance performed on the Aircraft by AVTEL shall be in accordance with
the maintenance program/documentation for the Aircraft as supplied in writing by
the Owner/Operator and performed at the rates as set forth in Appendix B and
subject to the following conditions:

(a)  Upon specific prior approval and written authorization of the
     Owner/Operator, pursuant to a work order request in the form set forth in
     Appendix C hereto, AVTEL shall perform additional work, services,
     maintenance, repair or replacement resulting from either additional
     requirements revealed during the performance of the Basic Services or from
     additional requirements of the Owner/Operator (hereinafter the "Additional
     Services"). Such Additional Services shall be accomplished in accordance
     with the provisions of this article and shall be subject to all the terms
     and conditions contained in this Agreement. All such Additional Services
     shall be fully documented.

1

                                    EXHIBIT 5
                                     Page 1

<PAGE>

AIRCRAFT STORAGE AND MAINTENANCE AGREEMENT
     AVTEL Services, Inc. and The Amor Trust and Southwest Airlines Co.
--------------------------------------------------------------------------------

     In the event Additional Services are requested by Owner/Operator, AVTEL
     shall submit a written proposal or proposals to the Owner/Operator for the
     performance of such Additional Services. Each proposal shall include, but
     not be limited to: a description of the service(s); an estimated price for
     labor and materials; and the effect, if any, the performance thereof shall
     have upon the redelivery date of the Aircraft, or on any of the other terms
     and conditions of this Agreement. All Additional Services will be performed
     through AVTEL at its Facility.

(b) The Owner/Operator's Authorized Representative (AR) shall be empowered to
make all decisions in the Owner/Operator's name and may authorize additional
work on-site and only in writing. The signature or initials of the AR shall
represent the official authorization of the Owner/Operator and shall authorize
AVTEL to proceed with the Additional Services and purchase whatever parts are
required to complete the authorized Additional Services. Work may proceed on
such authorization only on written acceptance, endorsed by initials or signature
of an AVTEL Planning Manager, or his/her designee. Southwest, as
Owner/Operator's agent hereunder, hereby appoints Gary Bjarke and Bill Rogers as
the Authorized Representatives for purposes of this Agreement. Owner/Operator
reserves the right to change the Authorized Representatives of Owner/Operator
(each, an "AR") on written notice to AVTEL.

(c) Repair items generated as a result of inspection, modification and/or
maintenance are considered non-routine items and not considered Additional
Services and shall be handled on an individual basis. The signature or initials
of the Owner/Operator's AR shall constitute the official authorization for AVTEL
to proceed with such repair items.

ARTICLE 2. TERM OF AGREEMENT

This Agreement shall be effective as of the 13th day of November 2001 and shall
continue in effect until the 31st day of May 2003, unless extended or terminated
as provided in Article 13.

ARTICLE 3. STANDARD OF SERVICE

The Services, Additional Services and other work performed by AVTEL pursuant to
this Agreement shall be performed in accordance with applicable U.S. Federal
Aviation Administration Regulations (FARs), Owner/Operator's provided and
approved maintenance program, manufacturers's maintenance standards and/or any
special instructions furnished by Owner/Operator in writing and accepted by
AVTEL. AVTEL, with the prior written consent of Owner/Operator, may subcontract
to other qualified repair or overhaul facilities some of the services to be
provided to Owner/Operator. AVTEL shall at all times, during the term of this
Agreement, maintain all licenses, permits and authorizations, including without
limitation its FAA Repair Station license, reasonably required in connection
with its performance of the Basic Services and Additional Services.

Nothing contained herein shall require either party to act contrary to any law,
regulations or order of any governmental body or officer having jurisdiction
hereof, or contrary to any permit or authorization

                                    EXHIBIT 5
                                     Page 2

<PAGE>

AIRCRAFT STORAGE AND MAINTENANCE AGREEMENT
     AVTEL Services, Inc. and The Amor Trust and Southwest Airlines Co.
--------------------------------------------------------------------------------

granted to either party by any government or governmental body, or contrary to
any arrangement pursuant to which AVTEL operates or utilizes any of its
facilities, or in any manner that would cause AVTEL's insurance to be
invalidated.

To allow for adequate set up time, AVTEL's Planning Department requires all
Owner/Operator furnished pertinent data under Article 4 ten (10) days prior to
aircraft induction into maintenance. Owner/Operator recognizes that failure to
provide data in a timely manner may affect AVTEL's ability to deliver the
Aircraft in an efficient and timely manner.

Owner/Operator shall have the option to provide technicians, subcontractors,
advisors, or any other person to perform services that are beyond AVTEL's
capabilities while Aircraft is under AVTEL's custody with prior written
authorization from AVTEL.

ARTICLE 4. CUSTOMER FURNISHED DATA

The Owner/Operator shall furnish AVTEL with the following technical data, as may
be required, prior to delivery of each Aircraft for storage:

         -Approved Maintenance Manuals/IPC/SRM and Wiring Diagrams
         -Flight Operations Manual
         -Routine Work Cards, as applicable

These documents will be completed as necessary and in accordance with all
regulatory requirements and, in addition to all technical data such as all
manuals, will be returned to the Owner/Operator when the Aircraft is redelivered
with all other data returned to the Owner/Operator within seven (7) days after
Aircraft is redelivered. Unless otherwise directed by Owner/Operator, all
manuals and records will be returned to Southwest, attention Manager Aircraft
Records, at the address set forth in Article 13 hereof.

Upon delivery of the Aircraft, the Owner/Operator shall make available for
AVTEL's inspection at the Facility, the current maintenance flight log. This
will remain with the work documents described above and will be returned to the
Owner/Operator at redelivery.

ARTICLE 5. REPRESENTATION

Owner/Operator hereby appoints Southwest to act as its agent to administer and
give and receive all notices under this Storage Agreement and to perform the
obligations of Owner/Operator set forth herein. This agency may be revoked by
ten (10) days prior written notice to AVTEL.

                                    EXHIBIT 5
                                     Page 3

<PAGE>

AIRCRAFT STORAGE AND MAINTENANCE AGREEMENT
     AVTEL Services, Inc. and The Amor Trust and Southwest Airlines Co.
--------------------------------------------------------------------------------

The AR shall be available at all times, either on-site or via telephone, while
work is being performed on the Owner/Operator's Aircraft. The AR is authorized
to act for and on behalf of Owner/Operator and Southwest for all purposes under
this Agreement. Owner/Operator recognizes that the unavailability or
unwillingness to make a decision on the part of the designated AR may result in
a work slow down or stoppage and possible charges for standby time. AVTEL shall
provide the AR access to the premises where work is performed at all times that
work is taking place on the Aircraft and at the risk and peril of the
Owner/Operator. AVTEL shall provide the designated AR office space, as
available, while work is being performed on the Aircraft. Long distance phone
calls and/or telefax transmissions by the AR shall be billed to the
Owner/Operator in accordance with Appendix B.

ARTICLE 6. DELIVERY

Delivery means the delivery of the Aircraft by the Owner/Operator to AVTEL prior
to storage and/or commencement of maintenance service on the Aircraft. AVTEL and
an Authorized Representative of Owner/Operator shall endorse the delivery of
Aircraft and authorize the requested storage and/or maintenance services by the
execution of a "Delivery Receipt" in the form attached hereto as part of
Appendix A. All deliveries shall be at the Facility. AVTEL shall conduct, upon
delivery of all storage aircraft, an inventory of loose equipment (to include
aircraft historical records) and record avionics serial numbers.

ARTICLE 7. REDELIVERY

Upon receipt of at least ten (10) days notice from the Owner/Operator in the
form attached hereto as Appendix D (the "Redelivery Notice"), AVTEL shall
redeliver the Aircraft identified in such Redelivery Notice to Southwest, on the
date set forth in such Redelivery Notice. If Southwest fails to take redelivery
of any Aircraft on the date set forth in a Redelivery Notice, Southwest shall
remain obligated for any charges arising from the continued storage of such
Aircraft until redelivery.

AVTEL shall redeliver the Aircraft to the Owner/Operator and both parties hereto
shall evidence the redelivery of Aircraft by the execution of a "Redelivery
Receipt" in the form attached hereto as part of Appendix A.

AVTEL SHALL MAKE THE AIRCRAFT AVAILABLE TO OWNER/OPERATOR AT MOJAVE AIRPORT FOR
DETAILED INSPECTION IN ORDER TO VERIFY THAT THE CONDITION OF THE AIRCRAFT AS IS
SET FORTH HEREIN AND THAT THE AIRCRAFT DOCUMENTS HAVE BEEN MAINTAINED AS
PROVIDED HEREIN REGARDING THE CONDITION, MAINTENANCE, STORAGE AND HISTORY OF
THE AIRCRAFT DURING AVTEL'S POSSESSION.

At all times while the Aircraft is being flown, either for a functional test
flight, acceptance test flight, or ferry flight, the Owner/Operator will be
presumed to have accepted the Aircraft into its care, custody and control even
in the event a receipt has not been effected.

                                    EXHIBIT 5
                                     Page 4

<PAGE>

AIRCRAFT STORAGE AND MAINTENANCE AGREEMENT
     AVTEL Services, Inc. and The Amor Trust and Southwest Airlines Co.
--------------------------------------------------------------------------------

ARTICLE 8. FLIGHT OPERATIONS

During or upon completion of storage or the Services and/or any Additional
Services on the Aircraft, but prior to redelivery thereof, the Owner/Operator or
its designee, may conduct one or more test flights. (These flights may be for
any purpose which may include maintenance test, demonstration, training, etc.).
Each flight shall be at the option and expense of the Owner/Operator. Following
the flight, AVTEL shall correct those items identified during such flight that
the Owner/Operator requires and authorizes to be corrected.

Following each test flight, a formal post-flight debriefing will be held between
AVTEL, the Owner/Operators' Flight Crew and the AR.

ARTICLE 9. EXCUSABLE DELAYS

AVTEL shall not be liable for any delay in the delivery of any Aircraft if the
delay is caused by forces beyond the reasonable control of AVTEL including, but
not limited to, delay by Owner/Operator in providing the necessary
specifications, data, material or approvals which is a direct cause of AVTEL's
delay in performance.

Neither party shall be liable for delay or failure in the performance in whole
or in part of this agreement if such failure is caused by Acts of God or public
enemy, fire, flood, strikes or other labor disputes (whether at the Facility or
elsewhere), riots, insurrection, war governmental orders or actions, failure of
transportation, delays occasioned by suppliers or subcontractors, failure by the
other to comply with the terms hereof, or any cause beyond the control of such
party whether or not specifically mentioned herein, such causes being termed
"force majeure".

ARTICLE 10. INSURANCE AND INDEMNIFICATION

AVTEL shall, at all times while the Aircraft is in its possession pursuant to
the Agreement, maintain in full force and effect policies of insurance issued by
responsible carriers and affording the following coverages: (i) airport premises
liability, including hangarkeeper's liability, (ii) products liability and
completed operations coverage and, (iii) workmen's compensation coverage as
required by law. The Owner/Operator shall, during the term of this Agreement,
maintain or cause to be maintained all risk hull and liability insurance on the
Aircraft. AVTEL shall name the Owner/Operator as additional insured party as
regards premises liability only. A certificate of insurance will be sent to
Owner/Operator within ten (10) days after execution and delivery of this
Agreement.

The Owner/Operator shall name AVTEL as an additional insured party with waiver
of subrogation for all in-flight operation of the Aircraft. In-flight operations
shall include flight testing, demonstration flights, flight instruction and/or
crew training, and the entire period of the delivery/redelivery flight.
Owner/Operator at its sole cost, shall provide reasonable Aircraft liability
insurance for the Aircraft, including bodily injury and property damage
liabilities. Such insurance shall include public liability, passenger liability,
and property damage liability coverage and shall name AVTEL as an additional
insured party therein. Owner/Operator shall furnish evidence of all such
insurance to be obtained by it in form reasonably satisfactory to AVTEL prior to
the date flights are participated in or conducted by AVTEL.

                                    EXHIBIT 5
                                     Page 5

<PAGE>

AIRCRAFT STORAGE AND MAINTENANCE AGREEMENT
     AVTEL Services, Inc. and The Amor Trust and Southwest Airlines Co.
--------------------------------------------------------------------------------

The insurance policies referred to in this Article shall provide that they may
not be canceled unless at least thirty (30) days prior written notice of such
cancellation is provided to Owner/Operator and AVTEL, respectively. Only 30 days
notice of cancellation will be provided if underwriters cancel the policy(ies).
The policies referred to in this Article shall also provide that there will be
no recourse against AVTEL for payment of premiums.

ARTICLE 11. WARRANTY

(a) AVTEL hereby warrants that its workmanship for the Services and Additional
Services performed on the Aircraft to be free from defects for a period of 180
days from the date of redelivery of the Aircraft.

(b) AVTEL obligations and liabilities under this warranty are applicable only to
the Aircraft, parts, and components which are the result of AVTEL's defective
workmanship.

(c) The obligations and responsibilities of AVTEL pursuant to this warranty for
the Services and Additional Services shall be limited to: (i repair, (ii)
replacement of parts, or (iii) reimbursement to the Owner/Operator for
Owner/Operator's reasonable costs related directly to the necessary repair or
replacement to remedy defect(s). If any condition that, upon inspection, is
found to be defective, it shall be limited to either the repair or the
re-overhaul of the Aircraft thereupon all at AVTEL's option. Owner/Operator will
ship at its expense and risk the warranted equipment for correction to and from
AVTEL.

(d) AVTEL's obligations and responsibilities under the warranty are expressly
limited to an amount not to exceed the service charge made for the Service or
Additional Service originally performed by AVTEL for the particular Aircraft.

(e) Obligations and responsibilities of the Owner/Operator: (i Owner/Operator is
obligated to give written notice to AVTEL of a malfunction, claimed to be within
the scope of this warranty, within thirty (30) days of discovery thereof. (ii)
Warranty work performed without the prior approval of AVTEL shall be at the sole
expense of the Owner/Operator. (iii) Defects resulting from improper maintenance
or misuse of the Aircraft by the Owner/Operator are not covered by this
warranty. (iv) In the event that investigation discloses no defects in
workmanship by AVTEL, the Owner/Operator shall pay AVTEL for expenses incurred
in the teardown, investigation, reassembly, and test of the condition in
question at AVTEL's standard labor and material rates.

(f) THE WARRANTIES OF AVTEL AND REMEDIES OF THE OWNER/OPERATOR SET FORTH ABOVE
ARE EXCLUSIVE AND IN SUBSTITUTION FOR, AND THE OWNER/OPERATOR HEREBY WAIVES,
RELEASES, AND RENOUNCES ALL OTHER WARRANTIES OF AVTEL AND RIGHTS, CLAIMS, AND
REMEDIES OF THE OWNER/OPERATOR AGAINST AVTEL FOR ANY OTHER WARRANTY, EXPRESS OR
IMPLIED, ARISING BY LAW OR OTHERWISE, WITH RESPECT TO ANY DEFECT IN THE AIRCRAFT
OR AVTEL'S WORKMANSHIP, INCLUDING, BUT NOT LIMITED TO, (I) ANY IMPLIED WARRANTY
OF MERCHANTABILITY OR FITNESS FOR USE, AND (II) ANY IMPLIED WARRANTY ARISING
FROM COURSE OF PERFORMANCE, COURSE OF DEALING OR USAGE OF TRADE. IN NO EVENT
SHALL AVTEL BE LIABLE UNDER THIS WARRANTY FOR SPECIAL, CONSEQUENTIAL, OR
INCIDENTAL DAMAGES, INCLUDING LOSS OF USE OR LOSS OF PROFITS.

(g) The warranties are exclusive to the Owner/Operator and not assignable or
transferable to any other party without the prior written consent of AVTEL,
which consent shall not be unreasonable withheld.

(h) The responsibility for processing and pursuing warranty claims against
manufacturers and other vendors shall rest with Owner/Operator. AVTEL agrees to
assign such warranties to Owner/Operator to

                                    EXHIBIT 5
                                     Page 6

<PAGE>

AIRCRAFT STORAGE AND MAINTENANCE AGREEMENT
     AVTEL Services, Inc. and The Amor Trust and Southwest Airlines Co.
--------------------------------------------------------------------------------

the extent assignable and/or to cooperate with and assist Owner/Operator in
processing and pursuing such warranties.

ARTICLE 12. PAYMENT

Owner/Operator or, pursuant to Article 7, Southwest shall pay, or cause to be
paid, to AVTEL in accordance with the payment terms set forth in Appendix A and
Appendix B for each Aircraft. Invoices shall be mailed to the following:

                                 The Amor Trust
                 C/O Wilmington Trust Company, as Owner Trustee
                  1100 North Market Street, Rodney Square North
                           Wilmington, Delaware 19890
                    Attention: Corporate Trust Administration

                                 With copies to:

                             Southwest Airlines Co.
                               2702 Love Field Dr.
                               Dallas, Texas 75235
                     Attn: Director of Maintenance Contracts

                                       And

                               The Boeing Company
                                  P.O. Box 3707
                                 Mail Code 21-34
                                Seattle, WA 98124
                        Attn: Vice President - Contracts

Owner/Operator will provide notice of any dispute to AVTEL promptly following
identification of the dispute. Each notice of dispute shall be in writing and
set forth the disputed amount(s), the invoice number(s) to which the amount(s)
relate and, in reasonable detail, the basis of the dispute.

The Owner/Operator or, pursuant to Article 7, Southwest shall pay to AVTEL for
the Basic Services, Additional Services, and non-routine services as indicated
in Appendix B "Rates / Terms and Conditions".

Any work performed by AVTEL on a time and material basis (T&M) will be subject
to the following guidelines:

T&M work will usually consist of non-routine and customer requested items. T&M
estimates are not firm, fixed price (FFP) quotes. Some T&M tasks will be
completed in less time than estimated and some will be completed in more time
than estimated. AVTEL will work the T&M tasks to the best of its ability under
conditions that may exist on the aircraft after the estimate is made and
approved. Actual work

                                    EXHIBIT 5
                                     Page 7

<PAGE>

AIRCRAFT STORAGE AND MAINTENANCE AGREEMENT
     AVTEL Services, Inc. and The Amor Trust and Southwest Airlines Co.
--------------------------------------------------------------------------------

conditions may not conform to the conditions assumed by the person making the
estimate initially. AVTEL will invoice T&M tasks for the actual hours incurred.

All payments to AVTEL, unless otherwise specified in Appendix B, under the
amount of $1,000,000.00 USD, shall be made by check or bank draft directly to
AVTEL at the following address:

                               AVTEL Services, Inc
                                16880 Avtel Drive
                              Mojave, CA 93501-2006
                         Attention: Accounts Receivable

Payments under the amount of $1,000,000.00 USD may be made by wire transfer as
specified in the next paragraph.

All payments to AVTEL, unless otherwise specified in Appendix B, in excess of
$1,000,000.00 USD, shall be made by wire transfer to the following bank:

<Table>
<S>                                             <C>                   <C>
      U.S. Bank (formerly Santa Monica Bank)    Checking Account #:   153491811763
      2450 Colorado Blvd., Suite 4000 West      FedWire Routing #:    122212611
      Santa Monica, CA 90404-3515               ACH Routing #:        122235821
      Attention: Mark A. Mitchell
</Table>

If this Agreement is terminated under conditions other than those expressly
stated herein, and other than for breach of this Agreement by AVTEL,
Owner/Operator shall be responsible for the payment of all charges incurred up
to and including the date of termination.

In the event that AVTEL shall not have received any payment due hereunder within
ten (10) days after written notice of non-payment, AVTEL shall have the right to
deem such non-payment to be a "STOP WORK AUTHORIZATION."

                                    EXHIBIT 5
                                     Page 8

<PAGE>

AIRCRAFT STORAGE AND MAINTENANCE AGREEMENT
     AVTEL Services, Inc. and The Amor Trust and Southwest Airlines Co.
--------------------------------------------------------------------------------

ARTICLE 13. MISCELLANEOUS

                              Material Disposition

Prior to redelivery of Aircraft, Owner/Operator shall instruct AVTEL regarding
the disposition of Owner/Operator's materials from the Facility. All
Owner/Operator's materials not removed within ninety (90) days shall be
considered abandoned, and AVTEL shall be entitled to dispose of such materials
at Owner/Operator's expense.

                              Notices and Requests

All notices and requests in connection with this Agreement shall be given in
writing and may be given by telecopy, overnight courier or certified U.S. mail,
postage prepaid, return receipt requested communication addressed as follows:

                               AVTEL Services, Inc
                                16880 Avtel Drive
                              Mojave, CA 93501-2006
                              Attention: Contracts
                       (661) 824-4517 / (661) 824-5103 (F)

or to such other address or addressee and AVTEL shall from time to time
designate in writing for this purpose, and in the case of notice to
Owner/Operator, addressed to:

                                 The Amor Trust
                        Wilmington Trust Company, Trustee
                  1100 North Market Street, Rodney Square North
                           Wilmington, Delaware 19890
                    Attention: Corporate Trust Administration
                       (302) 651-1834 / (302) 651-1576 (F)

                                 With copies to:

                             Southwest Airlines Co.
                               2702 Love Field Dr.
                               Dallas, Texas 75235
                     Attn: Director of Maintenance Contracts
                        (214)792-7456 / (214)792-7400 (F)

or to such other address or addressee as Owner/Operator may from time to time
designate in writing for this purpose.

                                    EXHIBIT 5
                                     Page 9

<PAGE>

AIRCRAFT STORAGE AND MAINTENANCE AGREEMENT
     AVTEL Services, Inc. and The Amor Trust and Southwest Airlines Co.
--------------------------------------------------------------------------------

                                   Assignment

Neither this Agreement nor any Basic Service nor Additional Service to be
provided hereunder shall be assigned or delegated by AVTEL without the prior
written consent of the Owner/Operator. Consent by the Owner/Operator to such
assignment in one instance shall not constitute consent to any other assignment.

AVTEL acknowledges that this Agreement has been assigned by Owner/Operator to
Wells Fargo Bank Northwest, National Association, Indenture Trustee as Security.
AVTEL does hereby, waive its rights under Sections 9790 et seq. of the
California Business and Professions Code, Sections 3051 et seq. of the
California Civil Code and Sections 1208.61 et seq. of the California Code of
Civil Procedures with regard to the Aircraft. AVTEL hereby grants to the
Owner/Operator or its agent an irrevocable power of attorney, coupled with an
interest, to sign such documents, effect such filings (including, without
limitation, with the FAA and the California Secretary of State) and take such
other action as the Trust or its agent shall deem necessary or useful to clear
any materialmen's mechanic's, workmen's repairmen's or other like liens from the
aircraft, or to establish that none exists. Notwithstanding any provision of
this Agreement to the contrary, AVTEL will not terminate this Agreement or
exercise any rights or remedies it may have hereunder, without providing at
least ten (10) days advance written notice to the Owner/Operator.

                                  Severability

Should any part of this Agreement be found invalid or unenforceable by competent
authority, the balance of this agreement to the extent that it is not held
invalid and unenforceable shall continue in full force and effect to the fullest
extent permitted by law.

                                  Governing Law

This Agreement shall be governed by and construed in accordance with the laws of
the State of California.

                                 Attorneys' Fees

In the event an action is brought to enforce or construe the provisions of this
Agreement, the prevailing party in such action (including any bankruptcy
proceeding) shall be awarded costs and reasonable attorney's fees as part of the
judgment in such action.

                                   Termination

In the event a party hereto defaults in the observance or performance of any of
its obligation herein contained, the other party may terminate this Agreement
upon fifteen (15) days written notice to the defaulting party, specifying the
default and requiring that the same be remedied. Termination shall become
effective provided such default continues for said fifteen-day period.

                                    EXHIBIT 5
                                     Page 10

<PAGE>

AIRCRAFT STORAGE AND MAINTENANCE AGREEMENT
     AVTEL Services, Inc. and The Amor Trust and Southwest Airlines Co.
--------------------------------------------------------------------------------

In the event of termination of this Agreement by either party, as provided in
this Article, other than by default of AVTEL, Owner/Operator shall pay AVTEL for
any expenses AVTEL may have incurred on behalf of the Owner/Operator for work in
process and items ordered from vendors.

                          Entire Agreement And Changes

This Agreement constitutes the full and complete Agreement of the parties and
supersedes any other agreement, understanding or representation whether verbal
or in writing by or between AVTEL and the Owner/Operator. Any changes amendments
or other modifications to the Agreement shall be in writing and executed by both
parties hereto.

                             Independent Contractor

The parties hereto shall not have the authority to obligate the other parties
hereto in any manner whatsoever without the prior written consent of such other
parties having been obtained, it being understood that the relationship of the
parties is that of independent contractors. Without limiting the foregoing, the
parties shall have no authority to sign or contract for, or commit the other
parties in any way, or accept any contract, or make any warranty, representation
or agreement on behalf of the other parties. Nothing herein is deemed to create
a partnership or joint venture between the parties hereto.

                                  Counterparts

This Agreement may be signed in any number of counterparts, each of which will
be an original, and all of which together will constitute the same instrument.

                                 Right to Audit

AVTEL shall, upon request by Owner/Operator, make available such of its books
and records during normal business hours, as are reasonably required to verify
hours worked, the cost of materials, subcontractor fees and charges, and other
information reasonably relevant to time and material charges invoiced under this
Agreement.

                                 Trust Capacity

Wilmington Trust Company is executing this Agreement on behalf of The Amor Trust
solely as Owner Trustee under the Trust Agreement dated as of November 13, 2001
with Amor Aircraft Corporation as Owner Participant and, except as expressly
provided herein, not in its individual capacity, and, except as expressly
provided herein, in no case whatsoever shall it be liable in its individual
capacity for any of the statements, representations, warranties, agreements or
obligations of The Amor Trust hereunder or for any loss in respect thereof, as
to all of which the parties agree to look solely to The Amor Trust; provided,
however, that Wilmington Trust Company in its individual capacity shall be
liable hereunder for its gross negligence or willful misconduct.

                                    EXHIBIT 5
                                     Page 11

<PAGE>

AIRCRAFT STORAGE AND MAINTENANCE AGREEMENT
     AVTEL Services, Inc. and The Amor Trust and Southwest Airlines Co.
--------------------------------------------------------------------------------

         IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be
executed on the day set forth in the "Introduction" to this Agreement.

AVTEL SERVICES, INC.                             THE AMOR TRUST
                                                 By Wilmington Trust Company,
                                                 not in its individual capacity
                                                 but solely as Owner Trustee

By:                                              By
       ------------------------------------         ----------------------------

Name:  Tim Mosich                                Name:  W. Chris Sponenberg

Title: Vice President,                           Title: Vice President
       Business Development & Contracts

Date:  November 13, 2001                         Date:  November 13, 2001

SOUTHWEST AIRLINES CO.

By:
       ------------------------------------

Name:  Laura Wright

Title: Vice President-Finance and Treasurer

Date:  November 13, 2001

                                   EXHIBIT 5
                                    Page 12
<PAGE>

AIRCRAFT STORAGE AND MAINTENANCE AGREEMENT
     AVTEL Services, Inc. and The Amor Trust and Southwest Airlines Co.
--------------------------------------------------------------------------------

                                   APPENDIX A
             TO AIRCRAFT STORAGE AND MAINTENANCE AGREEMENT #01-0280

                                STATEMENT OF WORK

Owner/Operator shall from time to time deliver Aircraft to AVTEL under this
Agreement. Owner/Operator will use its commercially reasonable efforts to
provide AVTEL a delivery schedule, which delivery schedule may be modified from
time to time by Owner/Operator. Upon delivery of an Aircraft and execution of a
Delivery Receipt as set forth in Article 6 of the Agreement, the Aircraft
identified in such Delivery Receipt shall become subject to the Agreement and
AVTEL shall perform the Basic Services set forth in this Appendix A with respect
to each such Aircraft under the terms set forth in this Agreement.

DESCRIPTION OF BASIC SERVICES/PRICING

The Basic Services to be performed in connection with each Aircraft delivered
hereunder, and the prices for such Basic Services, are described below. The
storage maintenance tasks performed as part of the Basic Services shall be in
accordance with the Boeing 737-600/700/800/900 D6633A101-SWA, Aircraft
Maintenance Manual, Part II, as supplied to AVTEL by Southwest Airlines,
including the Prolonged Parking, APU and Power Plant Maintenance Practices set
forth in such manual. The Basic Services will be provided on a firm, fixed price
(FFP) basis as set forth in the table below. The FFP includes labor only. All
Additional Services will be performed in accordance with the rates stated in
Appendix B. All parts and materials will be provided in accordance with the
rates stated in Appendix B.

The parties hereto agree that AVTEL shall perform the Basic Services during the
term of this Agreement for up to 19 Boeing 737-600/700/800/900 Aircraft if
delivered by Owner/Operator. AVTEL acknowledges and agrees that nothing in this
Agreement obligates Southwest or the Owner/Operator to provide any minimum
number of Aircraft to AVTEL hereunder or to store any Aircraft for any minimum
period of time.

<Table>
<Caption>

                                    TASK                                                       FFP
                                    ----                                                   ----------
<S>                                                                                        <C>
Park, Receive Aircraft and Ground Handling - Per Occurrence                                $ 1,444.80

Incoming Inspection, Inventory, Video - Per Occurrence                                     $   722.40

10-12-02-550-802 (Induction into Storage) - Per Occurrence                                 $14,936.25

10-12-02-620-802 (7-Day Repetitive Check) - Per Occurrence                                 $   225.75

10-12-02-620-803 (7/14-Day Repetitive Check) - Per Occurrence                              $   496.65

10-12-02-620-804 (7/14/30-Day Repetitive Check) - Per Occurrence                           $ 1,038.45

10-12-02-620-805 (7/14/30/60-Day Repetitive Check) - Per Occurrence                        $ 1,941.45

10-12-02-620-806 (7/14/30/60-Day Repetitive Check) - Per Occurrence                        $ 6,456.45

10-12-02-620-807 (7/14/30/90-Day Repetitive Check) - Per Occurrence                        $ 2,122.05

10-12-02-620-808 (7/14/30/60/90/180-Day Repetitive Check) - Per Occurrence                 $ 7,901.25

10-12-02-620-809 (7/14/30/60/90/180/365-Day Repetitive Check) - Per Occurrence             $12,235.65

10-12-02-550-801 (Reactivation from Storage) - Per Occurrence                              $16,931.25

Venting Aircraft (Outside Air Temperature Exceeds 85 Degrees Fahrenheit)                    No Charge

Monthly Parking Fee (Each Aircraft)                                                        $   200.00
</Table>

                                      A-1

<PAGE>
AIRCRAFT STORAGE AND MAINTENANCE AGREEMENT
     AVTEL Services, Inc. and The Amor Trust and Southwest Airlines Co.
--------------------------------------------------------------------------------

                             APPENDIX A - CONTINUED
             TO AIRCRAFT STORAGE AND MAINTENANCE AGREEMENT #01-0280

                                STATEMENT OF WORK

STORAGE CONDITIONS

The following conditions will be met for each Aircraft:

o    AVTEL will park the aircraft on a hard-packed surface (Unused Taxiway).

o    AVTEL will park the aircraft together as a group, segregated from other
     commercial aircraft in AVTEL's storage facility.

o    AVTEL will cordon off the area where the Aircraft are parked and access
     will be limited to those qualified maintenance personnel performing storage
     tasks on the aircraft.

o    AVTEL will have a spotter assist the driver any time mechanical equipment
     is operated in the immediate vicinity of the aircraft.

o    AVTEL will store aircraft records in a dedicated, segregated, secure
     location.

                                      A-2

<PAGE>
AIRCRAFT STORAGE AND MAINTENANCE AGREEMENT
     AVTEL Services, Inc. and The Amor Trust and Southwest Airlines Co.
--------------------------------------------------------------------------------

                             APPENDIX A - CONTINUED
             TO AIRCRAFT STORAGE AND MAINTENANCE AGREEMENT #01-0280

                                STATEMENT OF WORK

                 AIRCRAFT DELIVERY / REDELIVERY RECEIPT (FRONT)

<Table>
<S>                                        <C>                         <C>
[AVTEL SERVICES, INC. LOGO]
16880 AVTEL DRIVE, MOJAVE, CALIFORNIA 93501-2006                 F.A.A. REPAIR STATION NO. LVTR751K
=========================================================================================================

---------------------------------------------------------------------------------------------------------
                                           AIRCRAFT DELIVERY
---------------------------------------------------------------------------------------------------------
CUSTOMER:

PROPOSAL/CONTRACT NUMBER:

AIRCRAFT MAINTENANCE AGREEMENT IN EFFECT?
---------------------------------------------------------------------------------------------------------
             LOCATION                       DATE (MM-DD-YY)                     TIME
---------------------------------------------------------------------------------------------------------

              MOJAVE
--------------------------------------------------------------------------------------------------------
            AIRCRAFT TYPE                  REGISTRATION NUMBER             MFG. SERIAL NUMBER

--------------------------------------------------------------------------------------------------------
         ENGINE NUMBER/TYPE                MFG. SERIAL NUMBER                 FUEL LOAD
--------------------------------------------------------------------------------------------------------

---------------------------------------------------------------------------------------------------------

---------------------------------------------------------------------------------------------------------

---------------------------------------------------------------------------------------------------------

---------------------------------------------------------------------------------------------------------
BY:                                                              BY:
   --------------------------------------                            ------------------------------------
             CUSTOMER/DELIVERY                                       AVTEL SERVICES, INC./RECEIVING PARTY
---------------------------------------------------------------------------------------------------------

---------------------------------------------------------------------------------------------------------

---------------------------------------------------------------------------------------------------------
                                        AIRCRAFT REDELIVERY
---------------------------------------------------------------------------------------------------------
               LOCATION                      DATE (MM-DD-YY)                    TIME
---------------------------------------------------------------------------------------------------------
               MOJAVE                                                          AM/PM
---------------------------------------------------------------------------------------------------------

   FINANCIAL CLEARANCE:
                            -------------------------------------
                                   AVTEL FINANCE DEPARTMENT

BY:                                                           BY:
   --------------------------------------                         --------------------------------------
          CUSTOMER/RECEIVING PARTY                                AVTEL SERVICES, INC./DELIVERYING PARTY
---------------------------------------------------------------------------------------------------------

                              COMPLETION OF FORM - PROCEDURE/DISTRIBUTION

AIRCRAFT DELIVERY:     COMPLETE TOP SECTION, AND OBTAIN CUSTOMER SIGNATURE. PROVIDE ONE (1) COPY TO
                            CUSTOMER, ONE (1) COPY TO FINANCE, AND ONE (1) COPY TO CONTRACTS.

AIRCRAFT REDELIVERY:    COMPLETE BOTTOM SECTION, AND OBTAIN CUSTOMER SIGNATURE. PROVIDE ONE (1) COPY
                            TO  CUSTOMER, ONE (1) COPY TO FINANCE, AND ONE (1) COPY TO CONTRACTS.
---------------------------------------------------------------------------------------------------------
</Table>

                                       A-3
<PAGE>
AIRCRAFT STORAGE AND MAINTENANCE AGREEMENT
     AVTEL Services, Inc. and The Amor Trust and Southwest Airlines Co.
--------------------------------------------------------------------------------

                             APPENDIX A - CONTINUED
             TO AIRCRAFT STORAGE AND MAINTENANCE AGREEMENT #01-0280

                                STATEMENT OF WORK

                  AIRCRAFT DELIVERY / REDELIVERY RECEIPT (BACK)

<Table>
<S>                                     <C>                      <C>
[AVTEL SERVICES, INC. LOGO]
16880 AVTEL DRIVE, MOJAVE, CALIFORNIA 93501-2006                 F.A.A. REPAIR STATION NO. LVTR751K
=========================================================================================================

---------------------------------------------------------------------------------------------------------
                                        AIRCRAFT DELIVERY COMMENTS
---------------------------------------------------------------------------------------------------------
                                             INSPECTION

Removed A/C Library
Log A/C Library
Removed A/C Certificates
Performed A/C Video

---------------------------------------------------------------------------------------------------------
                                      AIRCRAFT REDELIVERY COMMENTS
---------------------------------------------------------------------------------------------------------
                                             INSPECTION

Re-present A/C Library
  (Customer must sign)
Re-place A/C Certificate
Present Redelivery Sheet to
  Finance for Release
Record departing fuel load

---------------------------------------------------------------------------------------------------------
</Table>

                                      A-4
<PAGE>
AIRCRAFT STORAGE AND MAINTENANCE AGREEMENT
     AVTEL Services, Inc. and The Amor Trust and Southwest Airlines Co.
--------------------------------------------------------------------------------

                                   APPENDIX B
             TO AIRCRAFT STORAGE AND MAINTENANCE AGREEMENT #01-0280

              RATES / TERMS AND CONDITIONS FOR ADDITIONAL SERVICES

The Services and Additional Services performed hereunder shall be carried out at
the following prices and rates set forth below.

<Table>
<Caption>

LABOR RATES                                          PER HOUR
-----------                                          --------
<S>                                                  <C>
Mechanic/Inspector (See Note 1)                        $43.00
Mechanic/Inspector Overtime                            $60.00
Backshop                                               $60.00
Drop-In Maintenance                                    $62.50
Non Destructive Test (NDT)                             $65.00
Engineering                                            $70.00
</Table>

Note 1:                Inspection (Buy Back) hours will be included in the
                  non-routine estimate for labor hours. Per Hour rate is for
                  storage related maintenance only.

MATERIAL AND OUTSIDE SERVICES RATES

<Table>
<S>                                                  <C>
Parts and Materials                                  Cost + 17%
Outside Services                                     Cost + 17%
Customer Furnished Parts and Materials               No Charge
Freight                                              Cost
Miscellaneous Small Parts (<$2.00)                   2.5% of Total Labor Dollars
</Table>

General Note:     All prices are in U.S. Dollars (USD)

PAYMENT TERMS

Invoiced monthly for each aircraft and payable within 30 days of invoice date.
In the event the Owner/Operator requests a significant amount of work, AVTEL
reserves the right to request payment of an estimated amount prior to
commencement of services.

If, at the time of receipt by AVTEL of a Redelivery Notice for an Aircraft, any
invoices under this Agreement are then past due, prior to Redelivery of such
Aircraft, Owner/Operator shall pay to AVTEL all such past due invoices under
this Agreement, together with all known and estimated fees and costs hereunder
for such Aircraft being redelivered.

                                      B-1
<PAGE>
AIRCRAFT STORAGE AND MAINTENANCE AGREEMENT
     AVTEL Services, Inc. and The Amor Trust and Southwest Airlines Co.
--------------------------------------------------------------------------------

GENERAL

In the event a single part, material or outside service is procured by AVTEL in
excess of $25,000.00, AVTEL may submit an invoice to owner/operator on a "net
15" basis.

Late charges will be assessed in the amount of 1% per month or portion of each
month on the outstanding balance.

EXPEDITE FEE

AVTEL will negotiate with Owner/Operator on a case-by-case basis an expedite fee
to reduce the overall time necessary to complete a specific task, as requested.

                                      B-1

<PAGE>

AIRCRAFT STORAGE AND MAINTENANCE AGREEMENT
     AVTEL Services, Inc. and The Amor Trust and Southwest Airlines Co.
--------------------------------------------------------------------------------

                                   APPENDIX C

             TO AIRCRAFT STORAGE AND MAINTENANCE AGREEMENT #01-0280
                           FORM OF WORK ORDER REQUEST

<Table>
<S>                               <C>                                 <C>                    <C>

--------------------------------------------------------------------------------------------------
[AVTEL SERVICES, INC. LOGO]                           World Wide Aviation Maintenance and Support
--------------------------------------------------------------------------------------------------
CUSTOMER REQUEST
--------------------------------------------------------------------------------------------------
CUSTOMER:                         REPRESENTATIVE NAME:                TAIL NO:               DATE:

--------------------------------------------------------------------------------------------------
                                      DESCRIPTION

--------------------------------------------------------------------------------------------------

--------------------------------------------------------------------------------------------------

--------------------------------------------------------------------------------------------------

--------------------------------------------------------------------------------------------------

--------------------------------------------------------------------------------------------------

--------------------------------------------------------------------------------------------------

--------------------------------------------------------------------------------------------------

--------------------------------------------------------------------------------------------------
CUSTOMER SIGNATURE:                                                   EST. HOURS:            DATE:

--------------------------------------------------------------------------------------------------
                                    PARTS REQUIREMENTS
--------------------------------------------------------------------------------------------------
DESCRIPTION                                                           PART NO:

[ ] YES:

[ ] NO:

--------------------------------------------------------------------------------------------------
                                  MAINTENANCE DISPOSITION
--------------------------------------------------------------------------------------------------

--------------------------------------------------------------------------------------------------

--------------------------------------------------------------------------------------------------

--------------------------------------------------------------------------------------------------

--------------------------------------------------------------------------------------------------

--------------------------------------------------------------------------------------------------

--------------------------------------------------------------------------------------------------
AVTEL MAINTENANCE SUPERVISOR SIGNATURE:                               EST. HOURS:            DATE:

--------------------------------------------------------------------------------------------------
                                        CONCURRENCE
--------------------------------------------------------------------------------------------------

CUSTOMER REPRESENTATIVE           TASK HOURS:     AVTEL REPRESENTATIVE:                      DATE:

--------------------------------------------------------------------------------------------------

--------------------------------------------------------------------------------------------------
                                  PRODUCTION CONTROLLER
--------------------------------------------------------------------------------------------------
TRACKING NO:           WO NO:        CONTROLLER NAME:                 STAMP:                 DATE:

--------------------------------------------------------------------------------------------------
[ILLEGIBLE]                                                                            [ILLEGIBLE]
</Table>

                                      C-1
<PAGE>

                                       [Aircraft Acquisition and Sale Agreement]

                                   APPENDIX D

             TO AIRCRAFT STORAGE AND MAINTENANCE AGREEMENT #01-0280

                            FORM OR REDELIVERY NOTICE

                                 THE AMOR TRUST
                 C/O WILMINGTON TRUST COMPANY, AS OWNER TRUSTEE
                            1100 NORTH MARKET STREET
                               RODNEY SQUARE NORTH
                           WILMINGTON, DELAWARE 19890

                                             , 200
                             ----------------     --

AVTEL Services, Inc.
16880 Avtel Drive
Mojave, California  93501
Attention:  Contracts

          Re:  Aircraft Storage and Maintenance Agreement #01-0280 dated as of
               November 13, 2001 among AVTEL Services, Inc., The Amor Trust and
               Southwest Airlines Co. (the "Agreement")

Ladies and Gentlemen:

                  REFERENCE IS MADE TO THE ABOVE-CAPTIONED AGREEMENT.
CAPITALIZED TERMS USED AND NOT DEFINED HEREIN SHALL HAVE THE MEANING GIVEN SUCH
TERMS IN THE AGREEMENT. PURSUANT TO ARTICLE 7 OF THE AGREEMENT, THE
OWNER/OPERATOR HEREBY INSTRUCTS AND AUTHORIZES YOU TO REDELIVER THE AIRCRAFT
IDENTIFIED BELOW TO SOUTHWEST AIRLINES CO. ON THE DATE(S) INDICATED BELOW.

<Table>
<Caption>

                  MANUFACTURER'S
AIRCRAFT          SERIAL NO.                U.S. REGISTRATION NO.               REDELIVERY DATE
--------          --------------            --------------------                ---------------
<S>               <C>                       <C>                                 <C>

</Table>

                            Sincerely,

                            THE AMOR TRUST

                            By:  WILMINGTON TRUST COMPANY, not in its individual
                                 capacity but solely as Owner Trustee

                                             By:
                                                 ------------------------------
                                             Name:
                                                   ----------------------------
                                             Title:
                                                    ---------------------------

                                      D-1
<PAGE>

                                       [Aircraft Acquisition and Sale Agreement]

                                    EXHIBIT 6

                                BFE BILL OF SALE

                  KNOW ALL MEN BY THESE PRESENTS:

                  THAT the undersigned, SOUTHWEST AIRLINES CO., a Texas
corporation ("Seller") is the owner of the full, legal and beneficial title to
the equipment (as more fully described on Schedule I attached hereto) delivered
or caused to be delivered to The Amor Trust ("Buyer") for installation on that
certain Boeing model 737-7H4 aircraft bearing manufacturer's serial number _____
and described as "Buyer Furnished Equipment" relating to such aircraft under the
Purchase Agreement No. 1810 dated as of January 19, 1994 between Seller and The
Boeing Company (such equipment referred to herein as the "BFE").

                  THAT for and in consideration, of the payment by Buyer of an
aggregate principal amount of One Dollar ($1.00) and other good and valuable
consideration, Seller does this ___ day of ________, 200_, grant, convey,
transfer, bargain and sell, deliver and set over all of its right, title and
interest in and to the BFE unto Buyer.

                  THAT SELLER hereby warrants to Buyer, its successors and
assigns, that there is hereby conveyed to Buyer on the date hereof good title to
the BFE, free and clear of all liens, encumbrances and rights of others and
Seller agrees with Buyer, and its successors and assigns, that Seller will
warrant and forever defend such title so conveyed against all claims and demands
whatsoever.

                  THIS BILL OF SALE IS DELIVERED BY SELLER TO BUYER IN, AND
GOVERNED BY THE LAW OF, THE STATE OF WASHINGTON.

                  IN WITNESS WHEREOF, Seller has caused this instrument to be
duly executed this day of _________, 200_.

                                             SOUTHWEST AIRLINES CO.

                                             By:
                                                  ----------------------------
                                             Its: Vice President and Treasurer

                                    EXHIBIT 6
                                     Page 1

<PAGE>
                                       [Aircraft Acquisition and Sale Agreement]

                                   SCHEDULE I

                                  [List of BFE]

                                    EXHIBIT 6
                                     Page 1

<PAGE>

                                       [Aircraft Acquisition and Sale Agreement]

                                   SCHEDULE I

<Table>
<Caption>

         (A)            (B)            (C)          (D)         (E)          (F)           (G)          (H)
<S>                     <C>            <C>          <C>         <C>          <C>           <C>          <C>
                        ***            ***          ***         ***          ***           ***          ***
                        ***            ***          ***         ***          ***           ***          ***
                        ***            ***          ***         ***          ***           ***          ***
                        ***            ***          ***         ***          ***           ***          ***
                        ***            ***          ***         ***          ***           ***          ***
                        ***            ***          ***         ***          ***           ***          ***
                        ***            ***          ***         ***          ***           ***          ***
                        ***            ***          ***         ***          ***           ***          ***
                        ***            ***          ***         ***          ***           ***          ***
                        ***            ***          ***         ***          ***           ***          ***
                        ***            ***          ***         ***          ***           ***          ***
                        ***            ***          ***         ***          ***           ***          ***
                        ***            ***          ***         ***          ***           ***          ***
                        ***            ***          ***         ***          ***           ***          ***
                        ***            ***          ***         ***          ***           ***          ***
                        ***            ***          ***         ***          ***           ***          ***
                        ***            ***          ***         ***          ***           ***          ***
                        ***            ***          ***         ***          ***           ***          ***
                        ***            ***          ***         ***          ***           ***          ***
                        ***            ***          ***         ***          ***           ***          ***
</Table>

                                   SCHEDULE I
                                     Page 1

<PAGE>
                                       [Aircraft Acquisition and Sale Agreement]

                                   SCHEDULE II

                                    Aircraft

<Table>
<Caption>

---------------------------------------------  ------------------------------------------------------
                Aircraft                              Engines Delivered with Aircraft
---------------------------------------------  ------------------------------------------------------------------------
                                                                                                          Estimated
                                       Serial                                                              Delivery
N Number      Make    Model            Number      Make                Model            Serial Number        Date
---------------------------------------------  ------------------------------------------------------------------------
<S>          <C>      <C>              <C>     <C>                   <C>               <C>       <C>      <C>
409WN        Boeing   737-7H4          27896   CFM International     CFM56-7B22        888457    888561      12/19/01

410WN        Boeing   737-7H4          27897   CFM International     CFM56-7B22        888557    888562      11/13/01

411WN        Boeing   737-7H4          29821   CFM International     CFM56-7B22        889577    889590      11/13/01

412WN        Boeing   737-7H4          29818   CFM International     CFM56-7B22        888582    888585      11/13/01

413WN        Boeing   737-7H4          29819   CFM International     CFM56-7B22        888589    888592      11/13/01

414WN        Boeing   737-7H4          29820   CFM International     CFM56-7B22        888605    888606      11/13/01

415WN        Boeing   737-7H4          29836   CFM International     CFM56-7B22        889631    889632      11/13/01

416WN        Boeing   737-7H4          32453   CFM International     CFM56-7B22        888650    888183      11/13/01

417WN        Boeing   737-7H4          29822   CFM International     CFM56-7B22        889677    888651      11/13/01

418WN        Boeing   737-7H4          29823   CFM International     CFM56-7B22        888662    888668      11/13/01

419WN        Boeing   737-7H4          29824   CFM International     CFM56-7B22        888711    888708         12/01

420WN        Boeing   737-7H4          29825   CFM International     CFM56-7B22          TBD       TBD           1/02

421LV        Boeing   737-7H4          32452   CFM International     CFM56-7B22          TBD       TBD           2/02

422WN        Boeing   737-7H4          29826   CFM International     CFM56-7B22          TBD       TBD           3/02

423WN        Boeing   737-7H4          29827   CFM International     CFM56-7B22          TBD       TBD           3/02

424WN        Boeing   737-7H4          29828   CFM International     CFM56-7B22          TBD       TBD           3/02

425LV        Boeing   737-7H4          29829   CFM International     CFM56-7B22          TBD       TBD           3/02

426WN        Boeing   737-7H4          29830   CFM International     CFM56-7B22          TBD       TBD           4/02

427WN        Boeing   737-7H4          29831   CFM International     CFM56-7B22          TBD       TBD           4/02
</Table>

                                   SCHEDULE II
                                     Page 1

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