Document:

<PAGE>

                   FIFTH AMENDMENT OF AGREEMENT OF SUBLEASE
                   ----------------------------------------

This Fifth Amendment of Agreement of Sublease ("Fifth Agreement"), dated as of
the date set forth below, is entered into by and between American Airlines,
Inc., a Delaware corporation ("American") and Midway Airlines Corporation, a
Delaware corporation (the "Sublessee"). Capitalized terms used herein and not
otherwise defined herein shall have the meanings assigned to such terms in the
Sublease referred to below.

                                  WITNESSETH:
                                  -----------

WHEREAS, pursuant to that certain Raleigh-Durham Airport Facilities Lease and
Use Agreement dated as of November 1, 1985, between the Raleigh-Durham Airport
Authority, a municipal corporation of the State of North Carolina ("Landlord")
and American (together with all amendments, the "Base Lease"), American leases
from Landlord certain premises (the "Base Lease Premises") at Raleigh-Durham
Airport; and

WHEREAS, American also leases from Landlord the improvements located on the real
property described in the Base Lease, which improvements are commonly referred
to as Terminal C (the "Improvements"); and

WHEREAS, American has subleased to Sublessee a portion of each of the Base Lease
Premises and the Improvements pursuant to that certain Agreement of Sublease
dated January 18, 1995 (the "Sublease"), amended pursuant to a First Amendment
of Agreement of Sublease dated on or about February 6, 1996 (the "First
Amendment"), and amendment to American Airlines' agreements dated April 25, 1996
(the "Second Amendment"), and a Third Amendment to Agreement of Sublease dated
February 10, 1997 (the "Third Amendment"); and a Fourth Amendment to Agreement
of Sublease dated July 29, 1997 (the "Fourth Amendment");and

WHEREAS, Sublessee desires to make certain additions and deletions to option
space and exercise certain option space; and

WHEREAS, Exhibit B-2A, B-3A and B-4A attached hereto replace Exhibits B-2, B-3,
         ---------------------------
and B-4 of the First Amendment.

NOW, THEREFORE, in consideration of the mutual promises contained herein, and
for other good and valuable consideration, the receipt and sufficiency of which
are hereby acknowledged, American and Sublessee hereby agree as follows:

1. Addition/Deletion of Option Space.  As of August 1, 1998, the parties agreed
   ---------------------------------
   to: delete the option for four ticket counter positions from space identified
   as 3-Q23 and add four ticket counter positions identified as 3-Q19 as set
   forth in Exhibit B-2A; and add 3-P21, P20 and P23 as sublease optional office
   space as set forth in Exhibit B-2A; delete space 4-N28 as sublease option
   space as set forth on Exhibit B-2 and add as sublease option space 4-B29 as
   set forth on Exhibit B-2A; and delete 407.29 sq.ft. from office space 1-A13
   space as set forth on Exhibit B-4A.

2. Leasing of Option Space; Rent Commencement
   --------------------------------------------

                                      -1-
<PAGE>

A. Effective as of August 1, 1998, American hereby subleases to Sublessee and
   Sublessee hereby subleases from American as part of the Demised Premises, the
   following space:

       (i)   office space identified as 3-P21, 3-P20 and 3-P23 as set forth in
             Exhibit B-2A attached hereto

       (ii)  Gates C22 and C23 and related holdroom space identified as 2-C55 in
             Exhibit B-3A attached hereto

       (iii) office space within area identified as space 1-A15 as set forth in
             Exhibit B-4A attached hereto

       (iv)  baggage makeup pier Number 5 identified as space 1-F26 in Exhibit
             B-4A attached hereto

       (v)   four ticket counter positions identified as 3-Q19 in Exhibit B-2A

B. Rent for the space subleased under clause A. above commenced or will be
   deemed to have commenced as follows:

       (i)   on August 1, 1998 with respect to Gate C22 and related holdroom
             space totaling 1,450 sq.ft.;

       (ii)  on August 1, 1998 with respect to one-half of the ticket counter
             space 3-Q19 totaling 303.38 sq.ft.

       (iii) on August 1, 1998 with respect to office space 3-P21 totaling
             486.35 sq.ft.

       (iv)  on October 1, 1998 with respect to Gate C23 and related holdroom
             totaling 482.37 sq.ft.

       (v)   on October 1, 1998 with respect to the office space 1-A15 totaling
             4,194.98 sq.ft.

       (vi)  on October 1, 1998 with respect to baggage makeup pier 1-F26
             totaling 2,800 sq.ft.

       (vii) on November 1, 1998 with respect to office space 3-P23 totaling
             317.03 sq.ft. and 3-P20 totaling 231.68 sq. ft.

C.   Effective as of May 15, 1999, American hereby subleases to Sublessee and
     Sublessee hereby subleases from American as part of the Demised Premises
     and rent will begin to accrue with respect to the following space:

       (i)   Gates C21 and C24 and related holdroom space totaling 950.64 sq.ft.
             identified as 2-C55 and 948.27 sq. ft. identified as 2-C50 in
             Exhibit B-3A.

       (ii)  One-half of the ticket counter space totaling 303.38 identified as
             3-Q19 in Exhibit B-2A attached hereto.

D.   Effective as of December 1, 1999, American hereby subleases to Sublessee
     and Sublessee hereby subleases from American as part of the Demised
     Premises, the following space:

       (i) Option office space as follows:

               a. 1-B52 totaling 386.51 sq. ft. identified on Exhibit B-4A

               b. 1-C52 totaling 1,632.16 sq. ft. identified on Exhibit B-4A

               c. 1-A54 totaling 1,958.53 sq. ft. identified on Exhibit B-4A

               d. 1-B36 totaling 339.21 sq. ft. identified on Exhibit B-4A

               e. 1-B36-5 totaling 105.95 sq. ft. identified on Exhibit B-4A

                                      -2-
<PAGE>

               f. 1-A13 totaling 1,843.97 sq. ft. identified on Exhibit B-4A

               g. 1-C13 totaling 337.55 sq. ft. identified on Exhibit B-4A

               h. 1-A18 totaling 2,200.99 sq. ft. identified on Exhibit B-4A

               i. 2-C46 totaling 920.86 sq. ft. identified on Exhibit B-3A

               j. 1-B39 totaling 531.10 sq. ft. identified on Exhibit B-4A

               k. 3-N20 totaling 50.02 sq. ft. identified on Exhibit B-2A

               l. 3-N22 totaling 155.62 sq. ft. identified on Exhibit B-2A

               m. 4-B29 totaling 1,002.35 sq. ft. identified on Exhibit B-2A

     (ii)  Option bag make-up area as follows:

               a. 1-E26 totaling 2,800 sq.ft. identified on Exhibit B-4A

     (iii) Option gate and hold room space as follows:

               a. 2-A46 totaling 2,897.29 sq.ft. identified on Exhibit B-3A

               b. 2-A54 totaling 473.79 sq.ft. identified on Exhibit B-3A

               c. 2-A55 totaling 500.08 sq.ft. identified on Exhibit B-3A

               d. 2-C50 totaling 2,867.58 sq.ft. identified on Exhibit B-3A

               e. 1-B37 totaling 3,851.52 sq.ft. identified on Exhibit B-4A

     (iv)  Option ticket counter space as follows:

               a. 3-Q23 totaling 217.52 sq. ft. identified on Exhibit B-2A

               b. 3-Q24 totaling 217.52 sq. ft. identified on Exhibit B-2A

3.   Surplus Space.  Notwithstanding anything to the contrary contained in this
     -------------
     Fifth Amendment or the Sublease, American and Sublessee agree that the
     office spaces identified as 1-A8, 1-C8, 1-A11 and 1-C11 in Exhibit B4-A
     attached hereto are also together known as the "Surplus Space" under the
     Fourth Amendment; and that should American elect to terminate the
     subleasing of such Surplus Space in accordance with the terms of the Fourth
     Amendment, then Sublessee shall thereafter have the option to sublease such
     Surplus Space on the terms applicable to Option Space subleasing except
     that the option to sublease such Surplus Space may be exercised by
     Sublessee at any time within ninety (90) days following its receipt of
     American's notice to terminate the subleasing of the Surplus Space under
     the Fourth Amendment.

4.   Miscellaneous.  This Fifth Amendment, together with the Sublease,
     -------------
     constitutes the entire agreement of the parties with respect to its subject
     matter and supersedes all prior agreements or understandings, whether
     written or oral, if any, concerning such subject matter. The Sublease, as
     specifically modified by this Amendment, is hereby ratified and shall
     remain in full force and effect in accordance with its terms.

WITNESS the signatures of the parties as of this _____ day of ________, 2000.

                                     By:  _____________________________________
                                                  Gary  F. Kennedy

                                     Its: Vice President- Corporate Real Estate
                                          -------------------------------------

                                      -3-
<PAGE>

ATTEST:

Charles D. MarLett
Corporate Secretary

(Corporate Seal)

STATE OF TEXAS

COUNTY OF TARRANT

I, a Notary Public of the County and State aforesaid, do hereby certify that
Charles D. MarLett personally came before me this day and acknowledged that he
is Corporate Secretary of American Airlines, Inc., a Delaware corporation, and
that by authority duly given and as the act of the corporation, the foregoing
instrument was signed in its name by its _____________ President, sealed with
its corporate seal and attested by himself as its Corporate Secretary.

Witness my hand and official stamp or seal, this the ______ day of __________,
19____.

                                         ________________________
                                         Notary Public

My Commission Expires: __________________

(Seal)

                                      -4-
<PAGE>

                                        MIDWAY AIRLINES CORPORATION

                                        By: __________________________________

                                        Its: President
                                            ----------------------------------

ATTEST:

Secretary

(Corporate Seal)

STATE OF ILLINOIS

I, a Notary Public of the County and State aforesaid, do hereby certify that
_____________________________ personally came before me this day and
acknowledged that (he/she) is Corporate Secretary of Midway Airlines
Corporation, a Delaware corporation, and that by authority duly given and as the
act of the corporation, the foregoing instrument was signed in its name by its
President, sealed with its corporate seal and attested by himself as its
Corporate Secretary.

Witness my hand and official stamp or seal, this the ______ day of __________,
1997.

                                    ________________________
                                    Notary Public

My Commission Expires: __________________

(Seal)

APPROVED and CONSENTED TO:

RALEIGH-DURHAM AIRPORT AUTHORITY

By:    __________________________________
Name:  __________________________________
Title: __________________________________

                                      -5-<PAGE>

================================================================================
                             CONTRACT CHANGE ORDER
================================================================================
PURCHASER:                  MIDWAY AIRLINES CORPORATION

PURCHASE AGREEMENT NO.:     PA-0393                       AIRCRAFT TYPE: CRJ

C.C.O. NO.:                 1                             DATED: March 31, 1998

PAGES AFFECTED:             See below                     PAGE 1 of  2

REASON FOR CHANGE:          Exercise of ***** ***** of Option Aircraft

================================================================================

DESCRIPTION OF CHANGE:

1.   The ***** ***** of Option Aircraft *********** ** *** ***** ***** ***
     ****** ********* are hereby converted to Firm Aircraft eleven (11) through
     thirteen (13) pursuant to letter agreement B97-7701-RJTL-CRJ393-001 to
     Purchase Agreement PA-0393 dated September 17, 1997.

     PAGES TO BE SUBSTITUTED       NEW/REVISED PAGES
     -----------------------       -----------------

     Page 49                       Attachment 1 to CCO #1 dated March 31, 1998

CHANGES TO THE AFFECTED PAGES ARE AS FOLLOWS:

          All references to ten (10) Aircraft shall be deemed to refer to
          thirteen (13) Aircraft in pages 1, 4, and 7.

Page 49   The Delivery Schedule hereby incorporates the delivery dates for Firm
          Aircraft ten (10) through thirteen (13).

================================================================================
     ALL OTHER TERMS AND CONDITIONS OF THE AGREEMENT WILL REMAIN UNCHANGED
================================================================================
FOR AND ON BEHALF OF:                   FOR AND ON BEHALF OF:

BOMBARDIER INC.                         MIDWAY AIRLINES CORPORATION

Signed:  /s/ Tony Prezioso              Signed: /s/ Jon Waller
       --------------------------              ---------------------------

Date:   March 31, 1998                  Date:  March 31, 1998
     ----------------------------            -----------------------------
================================================================================

* redacted
<PAGE>

                                  APPENDIX II
                               DELIVERY SCHEDULE

          Aircraft                                Scheduled Delivery Date

          First Aircraft                               ******** ****

          Second Aircraft                              ******** ****

          Third Aircraft                               ******** ******

          Fourth Aircraft                              ***** ****

          Fifth Aircraft                               **** ****

          Sixth Aircraft                               ********* ****

          Seventh Aircraft                             ********* ****

          Eighth Aircraft                              ******** ****

          Ninth Aircraft                               ******** ****

          Tenth Aircraft                               ******** ****

          Eleventh Aircraft                            ******* ****

          Twelfth Aircraft                             ***** ****

          Thirteenth Aircraft                          **** ****

**  This Aircraft shall have a grace period of 15 days

* redacted

                                      49
<PAGE>

================================================================================
                             CONTRACT CHANGE ORDER

PURCHASER:                  MIDWAY AIRLINES CORPORATION

PURCHASE AGREEMENT NO.:     PA-0393                         AIRCRAFT TYPE: CRJ

C.C.O. NO.:                 3                               DATED: Sept. 3, 1998

PAGES AFFECTED:             See below                       PAGE 1 of  5

REASON FOR CHANGE:          Exercise of ****** *** ***** ***** ** ******
                            Aircraft

DESCRIPTION OF CHANGE:

1.   The ****** *** ***** ***** ** Option Aircraft *********** ** ***** *** ***
     **** *** ****** ********* are hereby converted to Firm Aircraft fourteen
     (14) through twenty (20) pursuant to letter agreement B97-7701-RJTL-CRJ393-
     001 to Purchase Agreement PA-0393 dated September 17, 1997. In
     consideration of the above, Bombardier will: *** ****** *** ****** ******
     ********** ** ***** ****** ******** ********* ** **** **** *** **** *******
     * *** ***** **** ********** ********* *** ** ** **** ** *** **********
     ****** ******* ********* ****** **** *********

                                           PAGES TO BE SUBSTITUTED
                                           -----------------------
                                           NEW/REVISED PAGES
                                           -----------------

                         Page 49  Attachment 1 to CCO #3 dated Sept. 1, 1998
                         Page 4 to letter agreement 001   Attachment 2 to CCO
     #3 dated Sept. 1, 1998
                              Letter Agreement B98-7701-RL-2399L

CHANGES TO THE AFFECTED PAGES ARE AS FOLLOWS:

          All references to thirteen (13) Aircraft shall be deemed to refer to
          twenty (20) Aircraft in pages 1, 4, and 7.

Page 49   The Delivery Schedule hereby incorporates the delivery dates for Firm
          Aircraft fourteen (14) through twenty (20).

          Letter agreement B98-7701-RL-2399L is hereby incorporated into the
          Agreement.

Page 4 of B97-7701-RJTL-CRJ0393-001

          *** ****** ********* ** ******* ** ******* *** *** ***** ** ********
          ****** ****** ********** **** ******** ** *** ********** ******
          ******* ** *** ********* ****** *********

================================================================================
     ALL OTHER TERMS AND CONDITIONS OF THE AGREEMENT WILL REMAIN UNCHANGED
================================================================================
FOR AND ON BEHALF OF:                   FOR AND ON BEHALF OF:

BOMBARDIER INC.                         MIDWAY AIRLINES CORPORATION

Signed: _______________________         Signed: _________________________

Date: _________________________         Date: ___________________________
================================================================================

* redacted
<PAGE>

                                  APPENDIX II
                               DELIVERY SCHEDULE

          Aircraft                           Scheduled Delivery Date

          First Aircraft                          ******** ****

          Second Aircraft                         ******** ****

          Third Aircraft                          ******** ******

          Fourth Aircraft                         ***** ****

          Fifth Aircraft                          **** ****

          Sixth Aircraft                          ********* ****

          Seventh Aircraft                        ********* ****

          Eighth Aircraft                         ******** ****

          Ninth Aircraft                          ******** ****

          Tenth Aircraft                          ******** ****

          Eleventh Aircraft                       ******* ****

          Twelfth Aircraft                        ***** ****

          Thirteenth Aircraft                     **** ****

          Fourteenth Aircraft                     **** ****

          Fifteenth Aircraft                      ****** ****

          Sixteenth Aircraft                      ********* ****

          Seventeenth Aircraft                    ******* ****

          Eighteenth Aircraft                     ******* ****

          Nineteenth Aircraft                     ******** ****

          Twentieth Aircraft                      ******** ****

**  This Aircraft shall have a grace period of 15 days

* redacted
                                      49
<PAGE>

     2.2  Unless expressly provided for in this Agreement, the terms and
          conditions of the Agreement shall apply mutatis mutandis to the Option
          Aircraft, with the exception ***** * ********* ******* ** ********* **
          ******* *** ****** ******* *************** ****** ** ***** ** *******
          *** ** **** ****** *********** ***** * ******** ******* ** *********
          ** ******* ***** ******* *********** ******* ***** ******* **********
          ******* ***** *********** *********** ******** ******* ***** *******
          ******* ** *** ********* **** ********** ** ******* * ********** *
          ******* *** ******** ******** ******* ****** *** *** ******* *********
          ** *** ********* ******** ** ****** ********* *** **** ******* *****
          ******* *********** ******* *** ********* *********** ******* ***
          *********** ********* *** ******* *** ****** ** *********

          ************ *** ********* ****** ********** *** **** *** **********
          ** *** ****** ******** *** *** ****** *********

                    ****** ********* *** *** ******* ****** *********
                *** ****** ********* *** *** ********
                    ****** ********* *** *** *************
                    ****** ********* *** *** ***************

          ************ ****** ********* *** *** ************ ****** ********* **
          *** ********** *** ****** ********* *** *** ************ ***** ***
          ****** ********* *** *** ********* ************ *** ********** ** ***
          *** ********

     ***  **** **** ***** ** ***** *** ****** ****** ********** ********** **
          ********* *** ** ****** ********* *** *** ** *********** **** ***
          ******** ** *** ********** ****** ******* ********* ****** ****
          *********

     3.0  In the event of the termination of the Agreement, this Letter
          Agreement shall become automatically null and void.

     4.0  Upon exercise of Buyer's rights to purchase in accordance with this
          Letter Agreement, the parties shall amend the Agreement or enter into
          an additional purchase agreement in order to give effect to the
          purchase of Option Aircraft in accordance with the terms and
          conditions thereof.

     5.0  The provisions of this Letter Agreement are personal to Buyer and
          shall not be assigned or otherwise disposed of by Buyer without the
          prior written consent of BRAD.

* redacted

                                       4
<PAGE>

     September 1, 1998
     Our Ref: B98-7701-RL-2399L

     Midway Airlines Corporation
     300 West Morgan Street, Suite 1200
     Durham, NC 27701
     USA

     Attention: Mr. Robert Ferguson, Chairman, President & CEO

     Gentlemen,

     Reference is made to Purchase Agreement No. PA-0393 (the "Agreement")
     between Bombardier Inc., represented by its Bombardier Regional Aircraft
     Division ("Bombardier") and Midway Airlines Corporation ("Buyer") for the
     sale of twenty (20) Canadair Regional Jet Aircraft (the "Aircraft") as
     amended by Contract Change Order #1 dated March 31, 1998.

     This letter, when accepted and agreed to by Buyer contemporaneously with
     execution of Contract Change Order No. 3 ("CCO #3"), will become part of
     the Agreement and will evidence our further agreement with respect to the
     matters set forth below.

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

     Subject: ****** *******

     1.0  In consideration of Buyer exercising CCO #3, Bombardier shall provide
          in support of Buyer's arrangement of lease financing *** ** ** ****
          *** of the fourteenth (14th) through twentieth (20th) Firm Aircraft, *
          ***** **** ********** ********* ******* **** *********** ** ***
          ******** ********* ** ***** ** ******* ***** **** ***** ********** **
          ** * ******* ** *** ** *** *** ******** ******** ***** **** *******
          ********** *** ********** ********* **** ** ** **** *** *********
          ********** ** ********** *** ********** ********** ** ******

     1.1  ** ***** ****** *** ** ******* *** ****** ******* ** *** *****
          ********* ** *** **** *** ********* *** ****** ****** ******* *** **
          ********* ** ******* *** ***** ********* ** *** ** **** ** ***
          ********* **** *** ***** *********** ******** **** ** ** **** **** ***
          ***** ****** ******* ** *** ****** ***** ******** ******** ****** ****

* redacted

                                       1
<PAGE>

     2.0  In the event of the termination of the Agreement, this Letter
          Agreement shall become automatically null and void, except that the
          provisions of this letter agreement shall survive with respect to
          delivered and financed Aircraft.

     3.0  The provisions of this Letter Agreement are personal to Buyer and
          shall not be assigned or otherwise disposed of by Buyer without the
          prior written consent of Bombardier.

     Should there be any inconsistency between this Letter Agreement and the
     Agreement with respect to the subject matter covered by the terms hereof,
     then this Letter Agreement shall prevail.

     Yours truly
     BOMBARDIER INC.

     By:    ____________________________________

     Title: ____________________________________

     ACCEPTED AND AGREED TO:
     this     day of September, 1998

     Midway Airlines Corporation

     By:    ____________________________________

     Title: ____________________________________

                                       2
<PAGE>

================================================================================
                             CONTRACT CHANGE ORDER

PURCHASER:                    MIDWAY AIRLINES CORPORATION

PURCHASE AGREEMENT NO.:       PA-0393        AIRCRAFT TYPE: CRJ

C.C.O. NO.:                   4              DATED: Dec. 1, 1998

PAGES AFFECTED:               See below      PAGE 1 of 2

REASON FOR CHANGE:            Exercise of *** ***** ***** of Shadow Option
                              Aircraft

DESCRIPTION OF CHANGE:

1.   The ***** ***** of Shadow Option Aircraft *********** ***** *** ******
     ****** ********* are hereby converted to Firm Aircraft Twenty-one (21)
     through Twenty-three (23) pursuant to letter agreement B97-7701-RJTL-
     CRJ393-002 to Purchase Agreement PA-0393 dated September 17, 1997.

                                   PAGES TO BE SUBSTITUTED
                                   -----------------------
                                   NEW/REVISED PAGES
                                   -----------------

                                   Page 49   Attachment 1 to CCO #4 dated Dec.
                                   1, 1998

CHANGES TO THE AFFECTED PAGES ARE AS FOLLOWS:

          All references to twenty (20) Aircraft shall be deemed to refer to
          twenty-three (23) Aircraft in pages 1, 4, and 7.

Page 49   The Delivery Schedule hereby incorporates the delivery dates for Firm
          Aircraft twenty-one (21) through twenty-three (23).

================================================================================
     ALL OTHER TERMS AND CONDITIONS OF THE AGREEMENT WILL REMAIN UNCHANGED
================================================================================
FOR AND ON BEHALF OF:                   FOR AND ON BEHALF OF:

BOMBARDIER INC.                         MIDWAY AIRLINES CORPORATION

Signed: /s/ Richard Libby               Signed: /s/ J. Waller
       ---------------------------             ---------------------------

Date: December 1, 1998                 Date: December 1, 1998
      ----------------------------           -----------------------------
================================================================================

* redacted
<PAGE>

                                  APPENDIX II
                               DELIVERY SCHEDULE

     Aircraft                                     Scheduled Delivery Date

     First Aircraft                                    ******** ****

     Second Aircraft                                   ******** ****

     Third Aircraft                                    ******** ******

     Fourth Aircraft                                   ***** ****

     Fifth Aircraft                                    **** ****

     Sixth Aircraft                                    ********* ****

     Seventh Aircraft                                  ********* ****

     Eighth Aircraft                                   ******** ****

     Ninth Aircraft                                    ******** ****

     Tenth Aircraft                                    ******** ****

     Eleventh Aircraft                                 ******* ****

     Twelfth Aircraft                                  ***** ****

     Thirteenth Aircraft                               **** ****

     Fourteenth Aircraft                               **** ****

     Fifteenth Aircraft                                ****** ****

     Sixteenth Aircraft                                ********* ****

     Seventeenth Aircraft                              ******* ****

     Eighteenth Aircraft                               ******* ****

     Nineteenth Aircraft                               ******** ****

     Twentieth Aircraft                                ******** ****

     Twenty-first Aircraft                             ******** ****

     Twenty-second Aircraft                            ******** ****

     Twenty-third Aircraft                             ***** ****

** This Aircraft shall have a grace period of 15 days

* redacted

                                       2
<PAGE>

================================================================================
                             CONTRACT CHANGE ORDER

 PURCHASER:                   MIDWAY AIRLINES CORPORATION

 PURCHASE AGREEMENT NO.:      PA-0393                      AIRCRAFT TYPE: CRJ

 C.C.O. NO.:                  5                            DATED: Feb. 5, 1999

 PAGES AFFECTED:              See below                    PAGE 1

 REASON FOR CHANGE:           Additional Shadow Option Aircraft

DESCRIPTION OF CHANGE:

1.  Bombardier has granted Buyer certain rights with respect to the purchase of
    an additional *** **** shadow option aircraft in accordance with letter
    agreement B99-7701-RL-CRJ0393-012.

                                      PAGES TO BE SUBSTITUTED
                                      -----------------------
                                      NEW/REVISED PAGES
                                      -----------------
                                           Letter Agreement B99-7701-RL-
                                           CRJ0393-012 is hereby incorporated
                                           into the Agreement.

CHANGES TO THE AFFECTED PAGES ARE AS FOLLOWS:

================================================================================
     ALL OTHER TERMS AND CONDITIONS OF THE AGREEMENT WILL REMAIN UNCHANGED
================================================================================
 FOR AND ON BEHALF OF:                         FOR AND ON BEHALF OF:

 BOMBARDIER INC.                               MIDWAY AIRLINES CORPORATION

 Signed: ________________________              Signed: _______________________

 Date:   February 5, 1999                      Date:   February 5, 1999  _____
================================================================================

* redacted
<PAGE>

January 29, 1999
Our Ref: B99-7701-RL-CRJ0393-012

Midway Airlines Corporation
300 West Morgan Street, Suite 1200
Durham, NC 27701
USA

Attention: Mr. Robert Ferguson, Chairman, President & CEO

Gentlemen,

Re: Letter Agreement No. 012  (Re: Additional Shadow Option Aircraft)

Reference is made to Purchase Agreement No. PA-0393 (the "Agreement") between
Bombardier Inc., ("Bombardier") and Midway Airlines Corporation ("Buyer") for
the sale of ten (10) Canadair Regional Jet Aircraft (the "Aircraft") as amended.

This letter, when accepted and agreed to by Buyer contemporaneously with
execution of Contract Change Order No. 5 ("CCO #5"), will become part of the
Agreement and will evidence our further agreement with respect to the matters
set forth below.

All terms which are capitalized herein but not defined herein, shall have the
same meaning as in the Agreement.

Subject:      Additional Shadow Option Aircraft

      1.0     ** ************* ** ***** ****** ******* **** *** ***** **********
              ********* *** ****** ********* *** ***** ** ********* *** *** ****
              ****** ******** ***** ****** ********* **** *** **** ***** ***
              ****** ****** ******** ***** ****** ********* *** *** ****** ***
              ***** ***** ** ****** ****** ********** *** **** ****** ******
              ***** ***** **** **** ** *** ********* ********* ** ******
              ********** ****** ***** *** ***** ** ********* ** *** ***** ***
              ***** ******* * ************* ****** ** ******** ** * *** *** ***
              ***** **** *********** ****** ****** ***********

      1.1     The Additional Shadow Option Aircraft will be as described in
              Article 2 of the Agreement.

* redacted

                                       2
<PAGE>

      1.2     *** **** ***** **** ***** ******* *** **** ** *** **********
              ****** ****** ******** ********* *** ***** ******** ********
              ******** ****** ** ******** ** ** *** ********** ** *****
              ********** ***** ************ ********** ** ********* ****** *****
              ** ********* ******* ***** ******* ******** ****** ****** *******
              ************ *** ********* ** ******** ** **** ******** **** ****
              ***** **** *** ******* *** ****** *** ** ******* ** ********** **
              ********** **** *** ******** ********** ******* ******** **
              ******** * ** *** ********* *** *** ****** **** ******** ** ****
              ** *** **** ** ******** ** **** ********** ****** ****** ********
              ************ ****** ****** ******** ******** ********

      1.3         Upon receipt of the Additional Shadow Option Deposit referred
              to in paragraph 1.4 below, Bombardier agrees to reserve the
              delivery positions of the Block 1 Additional Shadow Option
              Aircraft as set forth in paragraph 2.1.

                  *** ***** * *** ***** * ********** ****** ****** ******** ***
              ******* ** ***** ***** ********** ** ***** *********** ***** **
              ******** ** *** ***** * *** ***** * ****** ****** ********* ****
              ******** ** *** ***** * *** ***** * ****** ****** ********* ***
              ********* ******** ***** ** *** ***** * *** ***** * **********
              ****** ****** ******** *** ***** ** ********* *** **** **
              ********* ****** *** ** *** ***** * *** ***** * ********** ******
              ****** ******** ********* ******** ***** *** ** ********* ** ***
              **** ** ******** ** *** ************* ****** ****** ********
              ****** ********** ***** ***** ** ***** *** **** ********* ********
              ******** *** **** ******** **** *** ******* ********* ********
              ***** ***** *** ** ******** **** *** ****** ******* ** ***** **
              *** ***** **** ***** *** ** ********* ******** ***** ** ** ***
              ********* *** ****** ******* ** ***** ********** **** ****** ***
              ********** ********** ****** ****** ******* ******** ** **
              ********* *** ****** *** ******* * ****** ********** ** ****** ***
              *** ******** ** ***** *** ******** ******** **** *********** ** **
              ****** ********** ** **** *** ******* *** ***** ** *** **********
              ******** **** *** **** ** ********* ** *** ** ** *** **** ***
              ********** ******* ** ******** ** ******

      1.4         As consideration for the rights obtained with respect to the
              purchase of the Additional Shadow Option Aircraft, Buyer shall
              make or cause to make payment to Bombardier a refundable deposit
              of ****** **** ******** ****** ****** ******* ******** *** ***
              ********** ******

                                       3

* redacted
<PAGE>

              ****** ******** **** *********** ****** ****** ********** ********
              *** ******* *** ***** ******** ****** ****** ******* ********* ***
              within ten (10) business days of the date of the full execution of
              CCO #5.

      2.0     The Additional Shadow Option Aircraft may be exercised in *** ***
              ****** ** ***** **** *** *** *** ***** ** **** *** ******** ****
              *********** ****** ****** ******** ** *** **** ** ** ******* ****
              ****** ***** ** *** ********* ******** **** ** *** *****
              ********** ****** ****** ******** ** **** ******

      2.1     The Scheduled Delivery Dates of the Additional Shadow Option
              Aircraft are as follows:

              ***** *

                    ***** ********** ****** ****** ********      ***** ****
                    ****** ********** ****** ****** ********     ***** ****
                    ***** ********** ****** ****** ********      *** ****

              ***** *

                    ****** ********** ****** ****** ********     **** ****
                    ***** ********** ****** ****** ********      **** ****
                    ***** ********** ****** ****** ********      ****** ****

              ***** *

                    ******* ********** ****** ****** ********    ********* ****
                    ****** ********** ****** ****** ********     ******* ****
                    ***** ********** ****** ****** ********      ******** ****
                    ***** ********** ****** ****** ********      ******** ****

      2.2     Upon exercise of ** ********** ****** ****** ****** Buyer will
              make or cause to be made *** ********* ******** ******** ** * ***
              ******** ****** ** **** ** ***** ********* ** ******* * ** ***
              **********

              ***    **  ** *** ********* ******** ****** **** *** *******
                         ********** ******** ******** ** ********* *** ****** **
                         ***** **** ******* **** ****** ***** ** ***

* redacted

                                       4
<PAGE>

                         ********* ******** *****

              ***    **  ** *** ********* ******** ***** ** ***** **** ******
                         **** ****** ***** ** *** ********* ******** ***** ***

              ***    **  ** *** ********* ******** ***** ** ***** **** **** ***
                         ****** ***** ** *** ********* ******** *****

              ***        *** ******** ******** ****** **** ******** ******** **
                         ** ************* **** *** *** *** ****** ** ** ******
                         *** ******** **** ** **** ******** ** ******

     3.0  CUSTOMER SERVICES

     Upon exercise of **** ********** ****** ****** ********, Bombardier will
          provide the following:

     3.1  ****** **** ********

     ** ******** ** *** ******** ******** ** ***** ** ***** * ******** ****** **
          *** ********** ********** **** ******** ** ** ********** ******* ***
          **** ******** *** ** ********** *** *** ****** ***** ***** *** *******
          *** ********** ****** ****** *********

     3.2  *********** ********

     ********* *********** ******** *** ********** ******** *** * ***** ** *****
          *** ** ******* ********* *** ********** ****** ****** ********* *****
          ***** ** * *********** ** *********** *********** *** *******
          ************

     3.3  ***** ******* **************

     ** ******** ** *** ****** ** ******** *** ***** ** *** ********** *** ****
          ********** ****** ****** ********* ********** **** ****** *** ********
          ** * ***** ******* ************** *** ** ********** ****** ** *** ***
          ******

* redacted

                                       5
<PAGE>

     3.4  To the extent that the training and services detailed in paragraphs
          3.1 through 3.3 have been provided to ***** ** ******* ** ***
          ************* ******** ********, Buyer shall remain responsible for
          all costs relating to the training and services provided in the event
          that the Aircraft is not delivered to Buyer as a result of a Default
          by Buyer under the Purchase Agreement.

     4.0  Unless expressly provided for in this Letter Agreement, the terms and
          conditions of the Agreement shall apply mutatis mutandis to the
          Additional Shadow Option Aircraft, with the exception of: *** ******
          ********** *** ******* **** **** ***** * ********* ******* **
          ********* ** ******* *** ****** ******* **************** ***** ***** *
          ******** ******* ** ********* ** ******* ***** ******* ***********
          **** ******* ***** ******* ********** *** ******* ***** ***********
          *********** ******** **** ******* ***** ******* ******** *** ***** ***
          ********* **** ********** ** ******* * ********** * ******* ***
          ******** ******** ******* ******

    5.0   In the event of the termination of the Agreement, this Letter
          Agreement shall become automatically null and void.

    6.0   Should Buyer elect to exercise its options as described herein,
          Bombardier and Buyer will amend the Agreement by Contract Change Order
          to give effect to the purchase of Additional Shadow Option Aircraft.

    7.0   The provisions of this Letter Agreement are personal to Buyer and
          shall not be assigned or otherwise disposed of by Buyer without the
          prior written consent of Bombardier.

Should there be any inconsistency between this Letter Agreement and the
Agreement with respect to the subject matter covered by the terms hereof, then
this Letter Agreement shall prevail.

Yours truly

BOMBARDIER INC.

Bombardier Aerospace

* redacted

                                       6
<PAGE>

___________________________________
Richard J. T. Libby
Senior Account Executive, Contracts
Regional Aircraft

ACCEPTED AND AGREED TO:
this 5th day of February, 1999

Midway Airlines Corporation

By: ___________________________________

Title: ____________________________________

                                       7
<PAGE>

================================================================================

                             CONTRACT CHANGE ORDER

 PURCHASER:               MIDWAY AIRLINES CORPORATION

 PURCHASE AGREEMENT NO.:  PA-0393                      AIRCRAFT TYPE: CRJ

 C.C.O. NO.:              6                            DATED: March 31, 1999

 PAGES AFFECTED:          See below                    PAGE 1 of  3

 REASON FOR CHANGE:       Exercise ** *** ****** ***** of Shadow Option Aircraft

 DESCRIPTION OF CHANGE:

1.  The ****** ***** ** Shadow Option Aircraft *********** ***** *** ******
    ****** ********* are hereby converted to Firm Aircraft Twenty-four (24)
    through Twenty-six (26) pursuant to letter agreement B97-7701-RJTL-CRJ393-
    002 to Purchase Agreement PA-0393 dated September 17, 1997.

2.  Paragraph 1.3 of Letter Agreement B99-7701-RL-CRJ0393-012 is amended such
    that: *** **** ******** ** *** ***** * ****** ****** ********* *** ***** *
    ********** ****** ****** ******** ********* ******** ***** **** ** *********
    *** **** **** ******** ** *** ***** * ****** ****** ********* *** ***** *
    ********** ****** ****** ********* ******** ***** **** ** *********

                                      PAGES TO BE SUBSTITUTED
                                      -----------------------
                                      NEW/REVISED PAGES
                                      -----------------

                                      Page 49    Attachment 1 to CCO #6 dated
                                      March 31, 1999
                                      Page 3 of letter agreement
                                      B99-7701-RL-CRJ0393-012  Attachment 2 to
                                      CCO #6 dated March 31, 1999

 CHANGES TO THE AFFECTED PAGES ARE AS FOLLOWS:

          All references to twenty-three (23) Aircraft shall be deemed to refer
          to twenty-six (26) Aircraft in pages 1, 4, and 7.

 Page 49  The Delivery Schedule hereby incorporates the delivery dates for
          Firm Aircraft twenty-four (24) through twenty-six (26).
 Page 3   Revises the conditions precedent to ********* *** ***** * ***
          ***** * Additional Shadow Option Aircraft Scheduled Delivery Dates

================================================================================
    ALL OTHER TERMS AND CONDITIONS OF THE AGREEMENT WILL REMAIN UNCHANGED
================================================================================
 FOR AND ON BEHALF OF:                         FOR AND ON BEHALF OF:

 BOMBARDIER INC.                               MIDWAY AIRLINES CORPORATION

 Signed: ______________________                Signed: ________________________

 Date: _______        _____________         Date: ________       _____________
================================================================================

* redacted
<PAGE>

                                  APPENDIX II
                               DELIVERY SCHEDULE

          Aircraft                           Scheduled Delivery Date

          First Aircraft                         ******** ****

          Second Aircraft                        ******** ****

          Third Aircraft                         ******** ******

          Fourth Aircraft                        ***** ****

          Fifth Aircraft                         **** ****

          Sixth Aircraft                         ********* ****

          Seventh Aircraft                       ********* ****

          Eighth Aircraft                        ******** ****

          Ninth Aircraft                         ******** ****

          Tenth Aircraft                         ******** ****

          Eleventh Aircraft                      ******* ****

          Twelfth Aircraft                       ***** ****

          Thirteenth Aircraft                    **** ****

          Fourteenth Aircraft                    **** ****

          Fifteenth Aircraft                     ****** ****

          Sixteenth Aircraft                     ********* ****

          Seventeenth Aircraft                   ******* ****

          Eighteenth Aircraft                    ******* ****

          Nineteenth Aircraft                    ******** ****

          Twentieth Aircraft                     ******** ****

          Twenty-first Aircraft                  ******** ****

          Twenty-second Aircraft                 ******** ****

          Twenty-third Aircraft                  ***** ****

          Twenty-fourth Aircraft                 ***** ****

          Twenty-fifth Aircraft                  *** ****

          Twenty-sixth Aircraft                  **** ****

**  This Aircraft shall have a grace period of 15 days

* redacted

                                       2
<PAGE>

1.1   The Additional Shadow Option Aircraft will be as described in Article 2 of
      the Agreement.

1.2   *** **** ***** **** ***** ******* *** **** ** *** ********** ****** ******
      ******** ********* *** ***** ******** ******** ******** ****** ** ********
      ** ** *** ********** ** ***** ********** ***** ************ ********** **
      ********* ****** ***** ** ********* ******* ***** ******* ******** ******
      ****** ******* ************ *** ********* ** ******** ** **** ********
      **** **** ***** **** *** ******* *** ****** *** ** ******* ** **********
      ** ********** **** *** ******** ********** ******* ******** ** ******** *
      ** *** ********* *** *** ****** **** ******** ** **** ** *** **** **
      ******** ** **** ********** ****** ****** ******** ************ ******
      ****** ******** ******** ********

1.3   Upon receipt of the Additional Shadow Option Deposit referred to in
      paragraph 1.4 below, Bombardier agrees to reserve the delivery positions
      of the Block 1 Additional Shadow Option Aircraft as set forth in paragraph
      2.1.

          *** ***** * *** ***** * ********** ****** ****** ******** ***
      ******* ** ***** ***** ********** ** ***** *********** ***** ** ********
      ** *** ***** * *** ***** * ****** ****** ******** ************* ****
      ******** ** *** ***** * ****** ****** ********* *** ********* ********
      ***** ** *** ***** * ********** ****** ****** ******** *** ***** **
      ********* *** **** ** ********* **** ******** ** *** ***** * ****** ******
      ********* *** ********* ******** ***** ** *** ***** * ********** ******
      ****** ******** *** ***** ** ********* *** **** ** ********* ****** *** **
      *** ***** * ** ***** * ********** ****** ****** ******** *********
      ******** ***** *** ** ********* ** *** **** ** ******** ** ***
      ************* ****** ****** ******** ****** ********** ***** ***** **
      ***** *** **** ********* ******** ******** *** **** ******** **** ***
      ******* ********* ******** ***** ***** *** ** ******** **** *** ******
      ******* ** ***** ** *** ***** **** ***** *** ** ********* ******** *****
      ** ** *** ********* *** ****** ******* ** ***** ********** **** ****** ***
      ********** ********** ****** ****** ******* ******** ** ** ********* ***
      ****** *** ******* * ****** ********** ** ****** *** *** ******** ** *****
      *** ******** ******** **** *********** ** ** ****** ********** ** **** ***
      ******* *** ***** ** *** ********** ******** **** *** **** ** ********* **
      *** ** ** *** **** *** ********** ******* ** ******** ** ******

                                       3

* redacted
<PAGE>

                             CONTRACT CHANGE ORDER
PURCHASER:                 MIDWAY AIRLINES CORPORATION

PURCHASE AGREEMENT NO.:  PA-0393            AIRCRAFT TYPE: CRJ
C.C.O. NO.:              7                  DATED: July 9, 1999
PAGES AFFECTED:          See below          PAGE 1 of 13

REASON FOR CHANGE:       Amend the scheduled delivery dates for the Firm
                         Aircraft ***** * Shadow Option aircraft and Additional
                         Shadow Option Aircraft.

DESCRIPTION OF CHANGE:

1.  The scheduled delivery dates of the Firm Aircraft are amended pursuant to
    Attachment 1 hereto.

2.  The scheduled delivery dates of the ***** * Shadow Option Aircraft are
    amended and restated as shown in Letter Agreement No. B97-7701-RL-CRJ0393-
    002 Rev. 1 attached hereto as Attachment 2.

3.  The scheduled delivery dates of the Additional Shadow Option Aircraft are
    amended and restated as shown in Letter Agreement No. B99-7701-RL-CRJ0393-
    012 Rev. 1 attached hereto as Attachment 3.

4.  Bombardier and Buyer agree that, notwithstanding the changes to the
    scheduled delivery dates contained herein, (i) *** ******** ******** **** **
    ***** ******* *** **** ******** ***** **** **** *********** **** ** **** **
    ********** ** ******* *** **** *** ****** ***** ** *** ********* ********
    **** ** **** **** ********* ***** **** **** ** ********** ******* **
    ********** **** **** ***** **** **** **** *** ** *** ********* ********
    ***** ** *** ******** ** *********** and (ii) the first ten (10) Firm
    Aircraft will be deemed to have been the original Firm Aircraft, the
    eleventh (11th) through twentieth (20th) Firm Aircraft will be deemed to
    have been the original Option Aircraft, and the twenty-first (21st) through
    twenty-sixth (26th) Firm Aircraft will be deemed to have been the Block 1
    and Block 2 Shadow Option Aircraft, all as shown on Attachments 1 and 2
    hereto.

5.  Bombardier and Buyer agree that the deferral ** *** ***** ***** of Shadow
    Option Aircraft will result in a suspension of the FSR services from the
    time of expiration of the current entitlement of FSR services until exercise
    of the ***** * Shadow Option Aircraft.

                                   PAGES TO BE SUBSTITUTED
                                   -----------------------
                                   NEW/REVISED PAGES
                                   -----------------

                                         Letter Agreement
                                   B97-7701-RL-CRJ0393-002 Attachment 2 to CCO
 #7 dated July 9, 1999
                                   B99-7701-RL-CRJ0393-012 Attachment 3 to CCO
 #7 dated July 9, 1999

CHANGES TO THE AFFECTED PAGES ARE AS FOLLOWS:
================================================================================
  ALL OTHER TERMS AND CONDITIONS OF THE AGREEMENT WILL REMAIN UNCHANGED
================================================================================
FOR AND ON BEHALF OF:                   FOR AND ON BEHALF OF:

BOMBARDIER INC.                         MIDWAY AIRLINES CORPORATION
================================================================================

* redacted
<PAGE>

Signed: _______________________         Signed: ___________________________

Date:   July 9, 1999                    Date:    July 9, 1999
<PAGE>

                                  APPENDIX II
                               DELIVERY SCHEDULE

     Aircraft                            Scheduled Delivery Date

     First Aircraft              November 1997    ******** ****
     Second Aircraft             December 1997    ******** ****
     Third Aircraft              February 1998**  ******** ****
     Fourth Aircraft             March 1998       ******** ****
     Fifth Aircraft              June 1998        ******** ****
     Sixth Aircraft              September 1998   ******** ****
     Seventh Aircraft            September 1998   ******** ****
     Eighth Aircraft             November 1998    ******** ****
     Ninth Aircraft              November 1998    ******** ****
     Tenth Aircraft              December 1998    ******** ****
     Eleventh Aircraft           January 1999     ******** ***** * ******
     Twelfth Aircraft            April 1999       ******** ***** * ******
     Thirteenth Aircraft         June 1999        ******** ***** * ******
     Fourteenth Aircraft         July 1999        ******** ***** * ******
     Fifteenth Aircraft          July 1999        ******** ***** * ******
     Sixteenth Aircraft          September 1999   ******** ***** * ******
     Seventeenth Aircraft        October 1999     ******** ***** * ******
     Eighteenth Aircraft         October 1999     ******** ***** * ******
     Nineteenth Aircraft         February 2000    ******** ***** * ******
     Twentieth Aircraft          March 2000       ******** ***** * ******
     Twenty-first Aircraft       April 2000       ******** ***** * ****** ******
     Twenty-second Aircraft      May 2000         ******** ***** * ****** ******
     Twenty-third Aircraft       July 2000        ******** ***** * ****** ******
     Twenty-fourth Aircraft      January 2001     ******** ***** * ****** ******
     Twenty-fifth Aircraft       September 2001   ******** ***** * ****** ******
     Twenty-sixth Aircraft       December 2001    ******** ***** * ****** ******

** This Aircraft shall have a grace period of 15 days

* redacted

                                       2
<PAGE>

July 9, 1999
Our Ref: B97-7701-RJTL-CRJ0393-002 Rev. 1

Midway Airlines Corporation
300 West Morgan Street, Suite 1200
Durham, NC 27701
USA

Attention: Mr. Robert Ferguson, Chairman, President & CEO

Gentlemen,

Re: Amended and Restated Letter Agreement No. 002  (Re: Shadow Option Aircraft)

Reference is made to Purchase Agreement No. PA-0393 (the "Agreement") between
Bombardier Inc., represented by its Bombardier Regional Aircraft Division
("BRAD") and Midway Airlines Corporation ("Buyer") for the sale of ten (10)
Canadair Regional Jet Aircraft (the "Aircraft").

This letter, when accepted and agreed to by Buyer contemporaneously with
execution of the Agreement, will become part of the Agreement and will evidence
our further agreement with respect to the matters set forth below.  This letter
supercedes and replaces Letter Agreement No. 002 (Re: Shadow Option Aircraft)
dated September 17, 1997.

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

Subject:  Shadow Option Aircraft

                                       4
<PAGE>

     1.0  ** ************* ** ***** ****** ******* **** *** ***** **********
          ********* *** ****** ********* *** ***** ** ****** ******** *****
          ****** ********* *** **** *** **** ********* ****** ****** **** ****
          ***** ******  * ************* ****** ** ********** ****** ********* **
          * *** *** *** ***** **** ******* ****** ***********

     1.1  The Shadow Option Aircraft will be as described in Article 2 of the
          Agreement.

     1.2  *** **** ***** **** ***** ******* *** **** ** *** ****** ******
          ******** ********* *** ***** ******** ******** ******** ****** **
          ******** ** ** *** ********** ** ***** ********** ***** ******
          ********** ** ********* ****** ***** ** ********* ******* *** *******
          *** ***** **** ****** ****** ******* ************* ********* **
          ******** ** **** ********  **** **** ***** **** *** ******* *** ******
          *** ** ******* ** ********** ** ********** **** *** ********
          ********** ******* ******** ** ******** * ** *** ********* *** ***
          ****** **** ******** ** **** ** *** **** ** ******** ** **** ******
          ****** ******** ******** ****** ******** ******** ********

     1.3  *** ****** ****** ******** *** ** ********* ** *** *** ****** ** *****
          *** ****** ****** ******** *** *** *** ***** ** **** *** ****** ******
          ******** **** ******* ****** ******** ****** **** ****** ***** ** ***
          ********* ******** **** ** *** ***** ****** ****** ******** ** ****
          ****** ******** **** ***** ***** **** *********** ****** ** ***
          ********* ** ******** *** ****** ****** ***** ******* **** ******
          ***** ** *** ********* ******** **** ** *** ***** ****** ******
          ******** ** **** ****** ** ***** **** *** ***** **** **** ****** ***
          *** ******** ***** * ********* ******** ******** ****** ******
          ******** ** ******** ** *** ******** ******** ** ** ********* *** ***
          * ***** ** ********** ****** ****** ******* *** ****** ****** ********
          ***** ***** **** ****** *************** *** **** **** *** ***** ****
          ***** ** *** ******** ***** ** *** ********** ****** ****** *********
          Should Buyer choose to exercise the right to purchase * ***** **
          ****** ****** ********, Buyer and BRAD agree to make all reasonable
          efforts to execute a definitive agreement within twenty-one (21) days
          of notice having been given.

* redacted

                                       5
<PAGE>

     1.4  The Scheduled Delivery Dates of the Shadow Option Aircraft are as
          follows:

***** *   ***** ****** ****** ********   *** ******* **** **** **** ******** ***
          ****** ****** ****** ********  *** ******* **** **** **** ******** ***
          ***** ****** ****** ********   *** ******* **** **** **** ******** ***

***** *   ****** ****** ****** ********  *** ******* **** **** **** ******** ***
          ***** ****** ****** ********   *** ******* **** **** **** ******** ***
          ***** ****** ****** ********   *** ******* **** **** **** ******** ***

***** *   ******* ****** ****** ********   *****           ****
          ****** ****** ****** ********    *****           ****
          ***** ****** ****** ********     ***             ****
          ***** ****** ****** ********     ****            ****

     1.5  As consideration for this ******, Buyer shall make or cause to make
          payment to BRAD a refundable deposit of **** ******** ****** ******
          ******* ***** ******* *** ****** ****** ******** **** ******* ******
          ********* ******** ***** ******** ****** ****** ******* ***** ********
          upon execution of the Agreement.  Upon receipt of the Shadow Option
          Deposit, BRAD agrees to ******* *** ******** ********* set forth in
          paragraph 1.4 pending receipt of Buyers conditional notice of
          intention to ******** ******* **** ****** ***** ** ******** ** ***
          ***** ****** ****** ******** ** *** ********** ****** ****** *****, as
          set forth in paragraph 1.3.

     1.6  Upon exercise of a ****** ****** *****, Buyer will make or cause to
          make the ******** ******** specified in Article 5 of the Agreement
          within ten (10) business days of the ******** ** *** ******.

     2.0  Upon exercise of ** ****** *****, and provided Buyer continues to
          operate a minimum of ten (10) Canadair Regional Jet aircraft, ****
          **** ****** *** **** ** *** *** *** *** *** ***** *** ****** ******
          ******** ********** *** **** ******* *** ************* ******** ** ***
          **** *** ****** *** ******** *** ******* ***********

* redacted

                                       6
<PAGE>

     2.1  **** *** ******** ** * ****** ****** ****** **** **** **** *******
          ********* *********** ******** *** ********** ******** *** * ***** **
          **** *** ** ******* ********* *** ****** ****** ******** **********
          ***** ***** ** * *********** ** *********** *********** *** *******
          ************

     2.2  Unless expressly provided for in this Agreement, the terms and
          conditions of the Agreement shall apply mutatis mutandis to the Shadow
          Option Aircraft, with the exception ***** * ********* ******* **
          ********* ** ******* *** ****** ******* *************** ****** **
          ***** ** ******* *** ** **** ****** *********** ***** * ********
          ******* ** ********* ** ******* ***** ******* *********** *******
          ***** ******* ********** ******* ***** *********** ***********
          ******** ******* ***** ******* ******** *** ********* **** **********
          ** ******* * ********** * ******* *** ******** ******** ******* *****
          *** *** ******* ********* ** *** ********* ******** ** ******
          ********* *** **** ******* ***** ******* *********** ******* ***
          ********* *********** ******* *** *********** ********* *** *******
          *** ****** ** *********

     ************ *** ********* ****** ********** *** **** *** ********** ** ***
          ****** ****** ******** *** *** ****** *********

     ****** ********* *** *** ******* *********
     ****** ********* *** *** ********
     ****** ********* *** *** *************
     ****** ********* *** *** ***************

     ************ ****** ********* *** *** ************ ****** ********* ** ***
          ********** *** ****** ********* *** *** ************ ***** *** ******
          ********* *** *** ********* ************ *** ********** ** *** ***
          ********

    3.0   In the event of the termination of the Agreement, this Letter
          Agreement shall become automatically null and void.

    4.0   Upon exercise of Buyer's rights to purchase in accordance with this
          Letter Agreement, the parties shall amend the Agreement or enter into
          an additional purchase agreement in order to give effect to the
          purchase of Shadow Option Aircraft in accordance with the terms and
          conditions thereof.

* redacted

                                       7
<PAGE>

     5.0  The provisions of this Letter Agreement are personal to Buyer and
          shall not be assigned or otherwise disposed of by Buyer without the
          prior written consent of BRAD.

Should there be any inconsistency between this Letter Agreement and the
Agreement with respect to the subject matter covered by the terms hereof, then
this Letter Agreement shall prevail.

Yours truly

BOMBARDIER INC.

By:    ___________________________________

Title: ___________________________________

ACCEPTED AND AGREED TO:
this 9th day of July, 1999

Midway Airlines Corporation

By:    ___________________________________

Title: ___________________________________

                                       8
<PAGE>

July 9, 1999
Our Ref: B99-7701-RL-CRJ0393-012 Rev.1

Midway Airlines Corporation
300 West Morgan Street, Suite 1200
Durham, NC 27701
USA

Attention: Mr. Robert Ferguson, Chairman, President & CEO

Gentlemen,

Re: Amended and Restated Letter Agreement No. 012  (Re: Additional Shadow Option
Aircraft)

Reference is made to Purchase Agreement No. PA-0393 (the "Agreement") between
Bombardier Inc., ("Bombardier") and Midway Airlines Corporation ("Buyer") for
the sale of ten (10) Canadair Regional Jet Aircraft (the "Aircraft") as amended.

This letter, when accepted and agreed to by Buyer contemporaneously with
execution of Contract Change Order No. 5 ("CCO #5"), will become part of the
Agreement and will evidence our further agreement with respect to the matters
set forth below.  This letter supercedes and replaces Letter Agreement No. 012
(Re: Additional Shadow Option Aircraft) dated February 5, 1999.

All terms which are capitalized herein but not defined herein, shall have the
same meaning as in the Agreement.

Subject:  Additional Shadow Option Aircraft

     1.0  ** ************* ** ***** ****** ******* **** *** ***** **********
          ********* *** ****** ********* *** ***** ** ********* *** *** ****
          ****** ******** ***** ****** ********* **** *** **** ***** *** ******
          ****** ******** ***** ****** ********* *** *** ****** *** ***** *****
          ** ****** ****** ********** *** **** ****** ****** ***** ***** ****
          **** ** *** ********* ********* ** ****** ********** ****** ***** ***
          ***** ** ********* ** *** ***** *** ***** ******* * *************
          ****** ** ******** ** * *** *** *** ***** **** *********** ******
          ****** ***********

* redacted

                                       9
<PAGE>

     1.1  The Additional Shadow Option Aircraft will be as described in Article
          2 of the Agreement.

     1.2  *** **** ***** **** ***** ******* *** **** ** *** ********** ******
          ****** ******** ********* *** ***** ******** ******** ******** ******
          ** ******** ** ** *** ********** ** ***** ********** *****
          ************ ********** ** ********* ****** ***** ** ********* *******
          ***** ******* ******** ****** ****** ******* ************ ***
          ********* ** ******** ** **** ********  **** **** ***** **** ***
          ******* *** ****** *** ** ******* ** ********** ** ********** **** ***
          ******** ********** ******* ******** ** ******** * ** *** *********
          *** *** ****** **** ******** ** **** ** *** **** ** ******** ** ****
          ********** ****** ****** ******** ************ ****** ****** ********
          ******** ********

     1.3       Upon receipt of the Additional Shadow Option Deposit referred to
          in paragraph 1.4 below, Bombardier agrees to reserve the delivery
          positions of the ***** * Additional Shadow Option Aircraft as set
          forth in paragraph 2.1.

               *** ***** * *** ***** * ********** ****** ****** ******** ***
          ******* ** ***** ***** ********** ** ***** *********** ***** **
          ******** ** *** ***** * *** ***** * ****** ****** *********  ****
          ******** ** *** ***** * *** ***** * ****** ****** ********* ***
          ********* ******** ***** ** *** ***** * *** ***** * ********** ******
          ****** ******** *** ***** ** ********* *** **** ** ********* ******
          *** ** *** ***** * *** ***** * ********** ****** ****** ********
          ********* ******** ***** *** ** ********* ** *** **** ** ******** **
          *** ************* ****** ****** ******** ****** ********** ***** *****
          ** ***** *** **** ********* ******** ******** *** **** ******** ****
          *** ******* ********* ******** ***** ***** *** ** ******** **** ***
          ****** ******* ** *****  ** *** ***** **** ***** *** ** *********
          ******** ***** ** ** *** ********* *** ****** ******* ** *****
          ********** **** ****** *** ********** ********** ****** ****** *******
          ******** ** ** ********* *** ****** *** ******* * ****** ********** **
          ****** *** *** ******** ** ***** *** ******** ******** ****
          *********** ** ** ****** ********** ** **** *** ******* *** ***** **
          *** ********** ******** **** *** **** ** ********* ** *** ** ** ***
          **** *** ********** ******* ** ******** ** ******

* redacted

                                       10
<PAGE>

     1.4       As consideration for the rights obtained with respect to the
          purchase of the Additional Shadow Option Aircraft, Buyer shall make or
          cause to make payment to Bombardier a refundable deposit of ******
          **** ******** ****** ****** ******* ******** *** *** ********** ******
          ****** ******** **** *********** ****** ****** ********** ******** ***
          ******* *** ***** ******** ****** ****** ******* ********* *** within
          ten (10) business days of the date of the full execution of CCO #5.

     2.0  The Additional Shadow Option Aircraft may be exercised ** *** ***
          ****** ** ***** **** *** *** *** ***** ** **** *** ******** ****
          *********** ****** ****** ******** ** *** **** ** ** ******* ****
          ****** ***** ** *** ********* ******** **** ** *** ***** **********
          ****** ****** ******** ** **** ******

     2.1  The Scheduled Delivery Dates of the Additional Shadow Option Aircraft
          are as follows:

          ***** *

               ***** ********** ****** ****** ********      ***** ****
               ****** ********** ****** ****** ********     **** ****
               ***** ********** ****** ****** ********      **** ****

          ***** *

               ****** ********** ****** ****** ********     ****** ****
               ***** ********** ****** ****** ********      ********* ****
               ***** ********** ****** ****** ********      ********* ****

          ***** *

               ******* ********** ****** ****** ********    ******* ****
               ****** ********** ****** ****** ********     ******** ****
               ***** ********** ****** ****** ********      ******** ****
               ***** ********** ****** ****** ********      ******** ****

     2.2  Upon exercise of an ********** ****** ****** *****, Buyer will make or
          cause to be made the ********* ******** ******** ** * *** ********
          ****** ** **** ** ***** ********* ** ******* * ** *** **********

* redacted

                                       11
<PAGE>

          ***  **   ** *** ********* ******** ****** **** *** ******* **********
                    ******** ******** ** ********* *** ****** ** ***** ****
                    ******* **** ****** ***** ** *** ********* ******** *****

          ***  **   ** *** ********* ******** ***** ** ***** **** ****** ****
                    ****** ***** ** *** ********* ******** ***** ***

          ***  **   ** *** ********* ******** ***** ** ***** **** **** ***
                    ****** ***** ** *** ********* ******** *****

          ***       *** ******** ******** ****** **** ******** ******** ** **
                    ************* **** *** *** *** ****** ** ** ****** ***
                    ******** **** ** **** ******** ** ******

     3.0  CUSTOMER SERVICES

     Upon exercise of **** ********** ****** ****** ********, Bombardier will
          provide the following:

     3.1 ****** **** ********

     ** ******** ** *** ******** ******** ** ***** ** ***** * ******** ****** **
          *** ********** ********** **** ******** ** ** ********** ******* ***
          **** ******** *** ** ********** *** *** ****** ***** ***** *** *******
          *** ********** ****** ****** *********

     3.2  *********** ********

     ********* *********** ******** *** ********** ******** *** * ***** ** *****
          *** ** ******* ********* *** ********** ****** ****** ********* *****
          ***** ** * *********** ** *********** *********** *** *******
          ************

     3.3  ***** ******* **************

     ** ******** ** *** ****** ** ******** *** ***** ** *** ********** *** ****
          ********** ****** ****** ********* ********** **** ****** *** ********
          ** * ***** ******* ************** *** ** ********** ****** ** *** ***

* redacted

                                       12
<PAGE>

          *****.

     3.4  To the extent that the training and services detailed in paragraphs
          3.1 through 3.3 have been provided to Buyer ** ******* ** ***
          ************* ******** ********, Buyer shall remain responsible for
          all costs relating to the training and services provided in the event
          that the Aircraft is not delivered to Buyer as a result of a Default
          by Buyer under the Purchase Agreement.

     4.0  Unless expressly provided for in this Letter Agreement, the terms and
          conditions of the Agreement shall apply mutatis mutandis to the
          Additional Shadow Option Aircraft, with the exception of: *** ******
          ********** *** ******* **** **** ***** * ********* ******* **
          ********* ** ******* *** ****** ******* **************** ***** ***** *
          ******** ******* ** ********* ** ******* ***** ******* ***********
          **** ******* ***** ******* ********** *** ******* ***** ***********
          *********** ******** **** ******* ***** ******* ******** *** ***** ***
          ********* **** ********** ** ******* * ********** * ******* ***
          ******** ******** ******* ******

     5.0  In the event of the termination of the Agreement, this Letter
          Agreement shall become automatically null and void.

     6.0  Should Buyer elect to exercise its options as described herein,
          Bombardier and Buyer will amend the Agreement by Contract Change Order
          to give effect to the purchase of Additional Shadow Option Aircraft.

     7.0  The provisions of this Letter Agreement are personal to Buyer and
          shall not be assigned or otherwise disposed of by Buyer without the
          prior written consent of Bombardier.

Should there be any inconsistency between this Letter Agreement and the
Agreement with respect to the subject matter covered by the terms hereof, then
this Letter Agreement shall prevail.

Yours truly

BOMBARDIER INC.

* redacted

                                       13
<PAGE>

Bombardier Aerospace

___________________________________
Richard J. T. Libby
Senior Account Executive, Contracts
Regional Aircraft

ACCEPTED AND AGREED TO:
this 9th day of July, 1999

Midway Airlines Corporation

By:    ___________________________________

Title: ___________________________________

                                       14
<PAGE>

================================================================================

                             CONTRACT CHANGE ORDER

PURCHASER:               MIDWAY AIRLINES CORPORATION

PURCHASE AGREEMENT NO.:  PA-0393                  AIRCRAFT TYPE: CRJ

C.C.O. NO.:              8                        DATED: January 12, 2000

PAGES AFFECTED:          See below                PAGE 1 of 7

REASON FOR CHANGE:       To amend the Purchase Agreement to (i) add EICAS 2000,
                         DFDR and EGPWS to the list of Buyer Selected Optional
                         Features for the twenty-third and subsequent Aircraft
                         and, (ii) amend the pricing resulting from the
                         aforementioned additions.

DESCRIPTION OF CHANGE:

1. P.A., Page 9 and 9(a) - Article 4 (Price)

   Article 4.1 is renamed Article 4.1.1 and is amended by reflecting that the
   base price for the Buyer Selected Optional Features set forth therein is
   applicable for the first through twenty-second Aircraft. Article 4.1.2 is
   added to provide the base price for the Buyer Selected Optional Features for
   the twenty-third and subsequent Aircraft.

2. P.A., Pages 51, 52, 52(a) and 52(b) - Appendix IV (Buyer Selected Optional
   Features)

   The Buyer Selected Optional Features list for the Aircraft is amended by
   adding EICAS 2000 as a standard feature and, DFDR and EGPWS as features for
   the twenty-third and subsequent Aircraft.

<TABLE>
                                                       PAGES TO BE SUBSTITUTED/ADDED
                                                       -----------------------------
                                                       NEW/REVISED PAGES
                                                       -----------------

     <S>                                               <C>
   Purchase Agreement pages 9 and 9(a)                 Attachment No. 1 to CCO No. 8
   Purchase Agreement pages 51, 52, 52(a), and 52(b)   Attachment No. 2 to CCO No. 8

</TABLE>

CHANGES TO THE AFFECTED PAGES ARE AS FOLLOWS:
================================================================================
ALL OTHER TERMS AND CONDITIONS OF THE AGREEMENT WILL REMAIN UNCHANGED
================================================================================
FOR AND ON BEHALF OF:                               FOR AND ON BEHALF OF:

BOMBARDIER INC.                                     MIDWAY AIRLINES CORPORATION

Signed: _______________________                     Signed: ____________________

Date:   _______________________                     Date:   ____________________
<PAGE>

     ARTICLE 4  -  PRICE

***  *****     *** **** ***** *** **** ** *** ***** ***** ** *** ****** ******
               ****** ******** ********** *** ***** ******** ******** ********
               ****** ** ******** ** *** ********* *** ***** ********* ********
               ********* ** ***** ********** ***** ****** ********** **
               ********* ******* **** ***** ******* ** ********* ******* ***
               ******* *** ********** ******** ****** ****** *******
               ***************** ********* ** ******** **** ********

**** *****     *** **** ***** *** **** ** *** ****** ***** ****** *** **********
               ******** ********** *** ***** ******** ******** ******** ******
               ** ******** ** *** ********* *** ***** ********* ********
               ********* ** ***** ********** ***** ****** ********** **
               ********* ******* **** ***** ******* ** ********* ******* *****
               ******* *** *********** ******** ***** ******* *** *********
               ****** ****** ******* ***************** ********* ** ********
               **** ********

     4.2       The price of the Aircraft shall be the Base Price adjusted for
               changes made pursuant to Article 11 and any Regulatory Changes
               pursuant to Article 8.4, and further adjusted to the Delivery
               Date to reflect economic fluctuations during the period from
               November 1, 1997 to the Delivery Date of each Aircraft ("Aircraft
               Purchase Price"). Such adjustments shall be based on the economic
               adjustment formula attached as Appendix I ("Economic Adjustment
               Formula").

     4.3       The Aircraft Purchase Price does not include any taxes, fees or
               duties including, but not limited to, sales, use, value added
               (including the Canadian Goods and Services Tax), personal
               property, gross receipts, franchise, excise taxes, assessments or
               duties ("Taxes") which are or may be imposed by law upon BRAD,
               any affiliate of BRAD, Buyer or the Aircraft whether or not there
               is an obligation for BRAD to collect same from Buyer, by any
               taxing authority or jurisdiction occasioned by, relating to or as
               a result of the execution of this Agreement or the sale, lease,
               delivery, storage, use or other consumption of any Aircraft, BFE
               or any other matter, good or service provided under or in
               connection with this Agreement. According to current legislation,
               Canadian taxes, duties and Goods and Services Tax are not
               applicable to aircraft sold and immediately exported from Canada.
               If changes to Canadian tax legislation result in taxes being
               imposed on Buyer, BRAD will cooperate with Buyer to mitigate the
               effect of such taxes on Buyer, at Buyer's expense

* redacted

                                       9
<PAGE>

     4.4       Notwithstanding any of the above, if any Taxes (other than
               Canadian income taxes charged on the income of BRAD) are imposed
               upon Buyer or become due or are to be collected from BRAD by any
               taxing authority, BRAD shall notify Buyer and Buyer shall
               promptly, but no later than ten (10) working days after receiving
               such notice, pay such Taxes directly to the taxing authority, or
               reimburse BRAD for such Taxes, as the case may be, including
               interest and penalties, so long as such interest or penalties are
               not attributable to the gross negligence or willful misconduct of
               BRAD. Buyer retains the right to contest, at Buyer's expense and
               by appropriate lawful proceedings, the imposition of such Taxes.

     4.5       Upon BRAD's request, Buyer shall execute and deliver to BRAD any
               documents that BRAD reasonably deems necessary or desirable in
               connection with any exemption from or reduction of or the
               contestation of or the defense against any imposition of Taxes.

                                     9(a)

<PAGE>

***                                   APPENDIX IV (A)
                                      ---------------

****                           AIRCRAFT ONE THROUGH TWENTY-TWO
                               -------------------------------

                              BUYER SELECTED OPTIONAL FEATURES
                              --------------------------------

<TABLE>
<CAPTION>
                                                                                      *****
                                                                                   *** **** **
   CR No.                                 Description                                  ****
                                                                                      ** **

      <S>                                                                          <C>
      00-008  Extended Range Version (51,000 lb MTOW) - ER                                ****
      00-009  Centre Wing Fuel Tank                                                       ****
      00-012  Take-off Flap Setting (8 deg)                                             ******
      00-013  FAA Collins Strapping                                                        ***
      21-009  Ground Air Conditioning Connection                                        ******
      23-005  Single SELCAL System                                                      ******
      23-012  Third VHF Comm. Radio - Full Provisions                                   ******
      25-093  Customized Cabin Interior - Midway Airlines                               ******
              - 50 pax with FAA Type III exit
              - G1 Galley - Cold Snack, Hot beverage, two (2) Coffeemakers and
              two (2) Carafes, provisions for two half size carts and five (5)
              standard containers
              -  - life vest pouches under seat
      25-083  Exterior Paint - Midway Airlines                                          ******
      25-099  Reclining Seats                                                           ******
</TABLE>

* redacted

                                      51
<PAGE>

      25-108  Leather Seat Covers                                     ******
      25-350  Structure for Universal provisions                      ****
      25-351  Second Flight Attendant position                        ******
      30-001  Red anti ice warning light (FAA)                        ***
      33-002  Logo Lights                                             ******
      33-003  Red Strobe Lights                                       ******
      33-004  Cargo Door Light                                        ******
      34-013  Collins FMS - provisions only                           ****
      34-019  On Board Data Loader                                    ******
      34-026  Ground Proximity Warning System audio Call-out          ****
      34-027  Altimeter Reset Auto Flash                              ***
      34-035  Single Collins FMS 4200                                 *******
      34-035  Single Collins GPS 4000 - not certified until 3Q 1997   ******
      35-004  EROS Magic Mask - installation only                     ******
      35-XXX  Additional oxygen mask on LHS                           ****
      72-002  General Electric CF34-3B1 Engine Series 200             ***
              Total Technical Features                                *******

      All prices listed above are expressed in July 1, 1995 US dollars, and are
      subject to economic adjustment to the date of aircraft delivery. This list
      and all prices are subject to change without notice

* redacted

                                      52
<PAGE>

***                           APPENDIX IV (B)
                              ---------------

****                AIRCRAFT TWENTY-THREE AND SUBSEQUENT
                    ------------------------------------

                       BUYER SELECTED OPTIONAL FEATURES
                       --------------------------------

<TABLE>
                                                                                   *** **** **
          CR No.            Description                                                ****
                                                                                      ** **

      <S>                                                                          <C>
      00-008  Extended Range Version (51,000 lb MTOW) - ER                                ****
      00-009  Centre Wing Fuel Tank                                                       ****
      00-012  Take-off Flap Setting (8 deg)                                             ******
      00-013  FAA Collins Strapping                                                        ***
      21-009  Ground Air Conditioning Connection                                        ******
      23-005  Single SELCAL System                                                      ******
      23-012  Third VHF Comm. Radio - Full Provisions                                   ******
      25-093  Customized Cabin Interior - Midway Airlines                               ******
              - 50 pax with FAA Type III exit
              - G1 Galley - Cold Snack, Hot beverage, two (2) Coffeemakers and
              two (2) Carafes, provisions for two half size carts and five (5)
              standard containers
              -  - life vest pouches under seat
      25-083  Exterior Paint - Midway Airlines                                          ******
      25-099  Reclining Seats                                                           ******
</TABLE>

* redacted

                                     52(a)
<PAGE>

25-108         Leather Seat Covers                                     ******
25-350         Structure for Universal provisions                        ****
25-351         Second Flight Attendant position                        ******
30-001         Red anti ice warning light (FAA)                           ***
33-002         Logo Lights                                             ******
33-003         Red Strobe Lights                                       ******
33-004         Cargo Door Light                                        ******
34-013         Collins FMS - provisions only                             ****
34-019         On Board Data Loader                                    ******
          **
34-027         Altimeter Reset Auto Flash                                 ***
34-035         Single Collins FMS 4200                                *******
34-035         Single Collins GPS 4000 - not certified until 3Q 1997   ******
35-004         EROS Magic Mask - installation only                     ******
35-XXX         Additional oxygen mask on LHS                             ****
72-002         General Electric CF34-3B1 Engine Series 200                ***
        ****   EICAS 2000                                                 ***
31-340  ****   Data Recorder - 88 Parameter DFDR (128 wps)             ******
34-328  ****   EGPWS - Enhanced Ground Proximity Warning System        ******
               Total Technical Features                               *******

All prices listed above are expressed in July 1, 1995 US dollars, and are
subject to economic adjustment to the date of aircraft delivery. This list and
all prices are subject to change without notice

* redacted

                                     52(b)
<PAGE>

================================================================================
                             CONTRACT CHANGE ORDER

PURCHASER:                  MIDWAY AIRLINES CORPORATION

PURCHASE AGREEMENT NO.:     PA-0393                    AIRCRAFT TYPE: CRJ

C.C.O. NO.:                 9                          DATED: January 26, 2000

PAGES AFFECTED:             See below                  PAGE 1 of  2

REASON FOR CHANGE:          To amend the Purchase Agreement to to increase the
                            number of instructor provided simulator training
                            missions included in the Pilot Simulator Training
                            course from ***** *** ** **** ***.

DESCRIPTION OF CHANGE:

1.  P.A., Page C-23 -- Article 3.2.2 (Pilot Simulator Training)
    Article 3.2.2 is amended to increase the number of simulator training
    missions for which BRAD shall provide a simulator instructor from ***** ***
    ** **** *** ********. This change shall be deemed effective retroactively
    from September 17, 1997.

                                             PAGES TO BE SUBSTITUTED/ADDED
                                             -----------------------------
                                             NEW/REVISED PAGES
                                             -----------------

    Purchase Agreement page C-23             Attachment No. 1 to CCO No. 9,
                                             effective retroactively from
                                             September 17, 1997.

CHANGES TO THE AFFECTED PAGES ARE AS FOLLOWS:
================================================================================
     ALL OTHER TERMS AND CONDITIONS OF THE AGREEMENT WILL REMAIN UNCHANGED
================================================================================
FOR AND ON BEHALF OF:                        FOR AND ON BEHALF OF:

BOMBARDIER INC.                              MIDWAY AIRLINES CORPORATION

Signed: ____________________________         Signed: ___________________________

Date:      January 26, 2000                  Date:   ___________________________
         ---------------------------
================================================================================

* redacted
<PAGE>

***  3.2.2  Pilot Simulator Training

            BRAD shall provide access to a TC or FAA approved flight simulator
            for the crew trained under Annex A Article 3.2.1. BRAD shall provide
            a simulator instructor for **** *** missions for the crew trained on
            BRAD's designated simulator in Montreal; each mission shall consist
            of **** *** hours in the simulator and required briefing/debriefing
            sessions.

     3.2.3  In-flight Training

            Should Buyer require aircraft flight training, such training shall
            be conducted in Buyer's Aircraft after the Delivery Date for up to a
            maximum of **** *** of Buyer's pilots. BRAD shall provide an
            instructor pilot at no additional charge; Buyer shall be responsible
            for the cost of fuel, oil, landing fees, taxes, insurance,
            maintenance, and other associated operating expenses required for
            the Aircraft during such training.

     3.2.4  Flight Attendant Course

            A familiarization course for up to *** *** of Buyer's flight
            attendant personnel shall be conducted. Each course shall be for a
            maximum of **** *** working days duration. This course shall present
            general information on the Aircraft and detailed information on the
            operation of the passenger safety equipment and emergency equipment.
            BRAD shall furnish for each participant in this course *** *** copy
            of the Flight Attendant Training Guide which shall not be revised.
            Buyer shall assist BRAD in the development of the Flight Attendant
            Training Guide to incorporate Buyer's specific equipment and
            procedures.

     3.2.5  Flight Dispatcher Course

            A course for up to *** *** of Buyer's flight dispatch personnel
            shall be conducted. Each course shall be for a maximum of **** ***
            working days

* redacted
                                     C-23
<PAGE>

            duration. The course shall consist of classroom instruction covering
            general Aircraft familiarization, coverage of performance, flight
            planning, weight and balance and the Minimum Equipment List. BRAD
            shall furnish for each participant in this course *** *** copy of
            the Flight Crew Operating Manual which shall not be revised.

* redacted
                                     C-23

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