Document:

Frontier Ailines/Triton Lease Amendment2

COUNTERPART  NO. ___ OF 4 SERIALLY  NUMBERED,  MANUALLY  EXECUTED  COUNTERPARTS.  TO THE EXTENT THAT THIS  DOCUMENT
CONSTITUTES CHATTEL PAPER UNDER THE UNIFORM COMMERCIAL CODE IN EFFECT IN ANY APPLICABLE  JURISDICTION,  NO SECURITY
INTEREST IN THIS  DOCUMENT  MAY BE CREATED  THROUGH THE  TRANSFER  AND  POSSESSION  OF ANY  COUNTERPART  OTHER THAN
COUNTERPART NO. 1.

                                    AMENDMENT NO. 1 TO AIRCRAFT LEASE AGREEMENT
                                            (BOEING 737-200A MSN 23007)

                  THIS AMENDMENT  NO. 1 TO AIRCRAFT LEASE AGREEMENT (this "Amendment") is dated as of February
___, 2002, and made by and between WELLS FARGO BANK NORTHWEST, N.A. (formerly First Security Bank, National
Association), not in its individual capacity but solely as owner trustee, as lessor ("Lessor") and FRONTIER
AIRLINES, INC., as lessee ("Lessee"), and, solely with respect to Section 5 below, TRITON AVIATION FINANCE
("Triton").  Capitalized terms not defined herein are used as defined in the Lease (as defined below).

                                                     RECITALS

A.       Pursuant to that certain Aircraft Lease Agreement dated as of February 26, 1999, as supplemented by
Lease Supplement No. 1, dated September 22, 1999 (the "Lease"), Lessor leased to Lessee one Boeing Model 737-200A
aircraft bearing manufacturer's serial number 23007 (as more particularly described in the Lease, the
"Aircraft");  and

B.       Lessee and Lessor have agreed to shorten the Term of the Lease and to amend certain provisions relating
to the return of the Aircraft at the end of the Term, subject to the terms and conditions contained herein;

                  NOW, THEREFORE, in consideration of the premises and other good and sufficient consideration,
Lessee and Lessor agree as follows:

1.       Expiration Date.  The definition of "Expiration Date" in Exhibit A to the Lease is hereby deleted in its
entirety and replaced with the following:

                  Expiration Date. shall mean November 30, 2002.

2.       Engine Return Condition.    Exhibit C to the Lease is hereby amended as follows:

(a)      Paragraph C(6) is amended by deleting everything after the word "manual" in the last sentence thereof.

(b)      Paragraph D(2) is deleted in its entirety and replaced with the following:

(2)      The Engines shall be returned with either (i) no fewer than 3,000 cycles remaining per Engine, or (ii)
                       no fewer than 9,000 cycles remaining for both Engines in the aggregate.

         (c)  Except as specifically amended by this Section 2, Exhibit C remains in full force and
effect and has not otherwise been amended or modified.

3.       Engine Maintenance and Overhaul.  In the event that an Engine Overhaul is required in order to cause an
Engine to comply with the terms of the Lease, including, without limitation, the applicable requirements of the
FAA, Lessee will make a good faith effort to minimize the cost of any work for which Lessee is entitled to
reimbursement from the reserve account established for such Engine pursuant to Section 4(b) of the Lease.  Lessee
will consult with Lessor regarding the scope of such work, and, unless Lessor and Lessee agree in writing that
additional work should be performed, will perform or cause to be performed only such work as is required, in
Lessee's reasonable judgment, in order to cause such Engine to comply with the terms of the Lease for the
remainder of the Term.  Without limiting the foregoing, if an Engine Overhaul would be required in order to meet
any of the requirements set forth in Exhibit C to the Lease upon the Return Occasion, then, notwithstanding any
other provision of the Lease to the contrary, Lessee will be entitled to perform such Engine Overhaul, and will
be entitled to reimbursement for the actual out-of-pocket costs incurred by it, to the same extent as during the
Term; provided that,  Lessee and Lessor will consult and agree as to the necessity and/or scope of any such
Engine Overhaul.

4.       Lump Sum Payment.  In consideration of the foregoing, Lessee agrees to pay to Lessor (a) on the date
hereof, an amount equal to $*, and (b) upon the Return Occasion, provided that no Casualty Occurrence has
occurred, an amount equal to $*;  provided further that, notwithstanding Section 4(b) of the Lease, Lessee will
be entitled to a credit against the amount payable pursuant to this clause (b) in an amount equal to * of the
amount remaining in the reserve accounts for each of the Engines on the Return Occasion (after taking into
account any claims pending on such date  and claims, if any, to be submitted after such date, as agreed by Lessee
and Lessor in accordance with Paragraph 3 above).

5.        Representation and Warranty.  Triton hereby represents and warrants to Lessee that the execution,
delivery and performance of this Amendment by Lessor does not conflict with, or result in any breach of, or
constitute a default (or event which with the giving of notice, or lapse of time, or both, would become a
default) under any note, bond, mortgage or indenture, contract, agreement, lease, sublease, license, permit,
franchise or other instrument or arrangement to which Lessor or Triton or any affiliate of Triton is a party.

6.        Effectiveness of  Lease.  Except as specifically amended by this Amendment, the Lease remains in full
force and effect and has not been amended or modified.

7.       Counterparts.  This Amendment may be executed by the parties in separate counterparts, each of which
when so executed and delivered shall be an original, but all such counterparts shall together constitute but one
and the same instrument.

8.       Governing Law.  This Amendment shall in all respects be governed by, and construed in accordance with,
the laws of the State of California.

9.       Expenses.  Each party shall pay its own costs and expenses in connection with the preparation, execution
and delivery of this Amendment.

                                [the remainder of this page is intentionally blank]

                  IN WITNESS WHEREOF,  Lessor, Lessee and Triton have caused this Amendment to be duly executed
as of the date and year first above written.

                                                              WELLS FARGO BANK
                                                               NORTHWEST, NA,
                                                               Not in its individual capacity but solely
                                                               as Owner Trustee

                                                              By:    _______________________________
                                                              Name:
                                                              Title:
                                                              TRITON AVIATION FINANCE

                                                              By:  ________________________________
                                                              Name:
                                                              Title:
                                                              FRONTIER AIRLINES, INC.
                                                                       Lessee

                                                              By:    _______________________________
                                                              Name:
                                                              Title:
                                                              Acknowledged:
                                                              TRITON AVIATION SERVICES LIMITED
                                                              Servicer

                                                              By:  _________________________________
                                                              Name:
                                                              Title:Frontier Airlines/Airbus Amendment

                                Amendment No. 4

                      To the A318/A319 Purchase Agreement
                           Dated as of March 10, 2000

                                    between

                                 AVSA, S.A.R.L.

                                      and

                            FRONTIER AIRLINES, INC.

This Amendment No. 4  (hereinafter  referred to as the  "Amendment")  is entered
into  as  of  November  30,  2001,   between   AVSA,   S.A.R.L.,   a  societe  a
responsabilite  limitee organized and existing under the laws of the Republic of
France,   having  its  registered  office  located  at  2,  Rond-Point   Maurice
Bellonte,  31700 Blagnac, France (hereinafter referred to as the "Seller"),  and
Frontier  Airlines,  Inc., a corporation  organized and existing  under the laws
of the  State of  Colorado,  United  States of  America,  having  its  principal
corporate   offices  located  at  7001  Tower  Road,   Denver,   CO  80249,  USA
(hereinafter referred to as the "Buyer").

                                   WITNESSETH

WHEREAS,   the  Buyer  and  the  Seller  entered  into  an  A318/A319   Purchase
Agreement,  dated as of March 10,  2000,  relating to the sale by the Seller and
the  purchase by the Buyer of certain  Airbus  Industrie  A318-100  and A319-100
model aircraft (the "Aircraft")  which,  together with all Exhibits,  Appendixes
and Letter  Agreements  attached thereto and as amended by Amendment No. 1 dated
as of July  17,  2000,  Amendment  No.  2  dated  as of  November  6,  2000  and
Amendment  No.  3  dated  as  of  June  18,  2001,  is  hereinafter  called  the
"Agreement".

WHEREAS, the Buyer wishes to exercise one option,

NOW, THEREFORE, IT IS AGREED AS FOLLOWS

1.       DEFINITIONS

         Capitalized  terms used herein and not  otherwise  defined  herein will
         have  the  meanings  assigned  to  them  in the  Agreement.  The  terms
         "herein",  "hereof" and  "hereunder"  and words of similar import refer
         to this Amendment.

2.       CLAUSE 9:  DELIVERY SHEDULE

2.1      The Buyer hereby  exercises  its option under  Paragraph  1.1 of Letter
         Agreement  No.2 to the  Agreement to firmly order A319 Option  Aircraft
         No.  1  (the  "Firmly   Ordered  Option   Aircraft").   Therefore,   in
         accordance  with  Paragraph  2.1  of  Letter  Agreement  No.  2 to  the
         Agreement,  the Seller  offers the Buyer a  delivery  position  for one
         A319 Additional Option Aircraft in the 3rd Quarter of year 2005.

2.2      As a  consequence  of Paragraph  2.1 above,  the delivery  schedule set
         forth  in  Clause  9.1.1  of  the  Agreement  is  hereby  canceled  and
         replaced by the following quoted provisions:

         QUOTE

    Firm Aircraft A/C ID        Aircraft Type                        Delivery
    No.

        *

    Option          A/C ID        Aircraft Type                       Delivery
    Aircraft No.

         *

         UNQUOTE

3.       PREDELIVERY PAYMENTS

         The  schedule  of  Predelivery  Payments  for the  Aircraft  is  hereby
         amended  to reflect  the  changes  detailed  above in  Paragraph  2. On
         signature  of this  Amendment,  the  Buyer  will  make all  Predelivery
         Payments then due to the Seller.

4.       CLAUSE 5.3:  DEPOSIT

         On signature of this  Amendment,  the Buyer will pay the Seller the sum
         of US$* , which  represents  the  nonrefundable  deposit  (the  "Option
         fee") for the A319  Additional  Option  Aircraft.  The  Option Fee paid
         will  be  credited  without  interest  against  the  first  Predelivery
         Payment for such A319 Additional Option Aircraft.

5.       EFFECT OF THE AMENDMENT

         The Agreement  will be deemed  amended to the extent  herein  provided,
         and,  except as  specifically  amended  hereby,  will  continue in full
         force  and  effect  in  accordance  with  its  original   terms.   This
         Amendment  supersedes  any  previous  understandings,  commitments,  or
         representations  whatsoever,  whether  oral or written,  related to the
         subject matter of this Amendment.

         Both parties  agree that this  Amendment  will  constitute an integral,
         nonseverable  part of the Agreement and be governed by its  provisions,
         except  that  if  the  Agreement  and  this   Amendment  have  specific
         provisions that are  inconsistent,  the specific  provisions  contained
         in this Amendment will govern.

6.       CONFIDENTIALITY

         This Amendment is subject to the  confidentiality  provisions set forth
         in Clause 22.5 of the Agreement.

         IN WITNESS  WHEREOF,  the parties  hereto have caused this Amendment to
         be  executed  by their  respective  officers  or  agents  on the  dates
         written below.

                                                          AVSA, S.A.R.L.

                                                          By:_________________

                                                          Its:_________________

                                                          Date: November 30, 2001

                                                          FRONTIER AIRLINES, INC.

                                                          By:__________________

                                                          Its:__________________

                                                          Date: November 30, 2001

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