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                               ATA HOLDINGS CORP.

                          9 5/8% SENIOR NOTES DUE 2005



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                          THIRD SUPPLEMENTAL INDENTURE

                          DATED AS OF JANUARY 30, 2004

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                WELLS FARGO BANK NORTHWEST, NATIONAL ASSOCIATION
                                   as Trustee



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     THIRD SUPPLEMENTAL INDENTURE, dated as of January 30, 2004, among ATA
HOLDINGS CORP. (formerly known as Amtran, Inc.) (the "Company"), ATA Airlines,
Inc. (formerly known as American Trans Air, Inc.), Ambassadair Travel Club,
Inc., ATA Leisure Corp. (formerly known as ATA Vacations, Inc.), Amber Travel,
Inc., American Trans Air Training Corporation, American Trans Air ExecuJet, Inc.
(each, an Indiana corporation), ATA Cargo, Inc. (formerly Amber Air Freight
Corporation) (a California corporation) (the "Original Guarantors") and Chicago
Express Airlines, Inc., a Georgia corporation ("Chicago Express" and together
with the Original Guarantors, the "Guarantors"), as guarantors and WELLS FARGO
BANK NORTHWEST, NATIONAL ASSOCIATION (formerly known as First Security Bank,
N.A.), a national banking association (the "Trustee").

     WHEREAS, the Company, the Original Guarantors and the Trustee are parties
to an Indenture and a First Supplemental Indenture, each dated as of December
11, 1998 (collectively, the "Indenture"), pursuant to which the Company issued
its 9 5/8% Senior Notes Due 2005 (the "2005 Notes"); and

     WHEREAS, the Company, the Guarantors and the Trustee are parties to a
Second Supplemental Indenture, dated as of January 21, 2004, pursuant to which
Chicago Express was made a Guarantor under the Indenture;

     WHEREAS, the Board of Directors of the Company has determined that it is in
the best interests of the Company to authorize and approve certain amendments
(the "Proposed Amendments") to the Indenture;

     WHEREAS, Section 9.02 of the Indenture provides that the Company, the
Guarantors and the Trustee may amend the Indenture and the 2005 Notes with the
written consent of the Holders of at least a majority in principal amount of the
2005 Notes then outstanding.

     WHEREAS, the Company has distributed an offering memorandum (the "offering
memorandum") and accompanying consent and letter of transmittal, each dated
January 9, 2004, to the Holders of the 2005 Notes in connection with the
Proposed Amendments as described in the offering memorandum;

     WHEREAS, the Holders of a majority in principal amount of the 2005 Notes
outstanding have approved the Proposed Amendments to the provisions of the
Indenture;

     WHEREAS, the execution and delivery of this instrument have been duly
authorized and all conditions and requirements necessary to make this instrument
a valid and binding agreement have been duly performed and complied with;

     NOW, THEREFORE, for and in consideration of the premises and other good and
valuable consideration, receipt and sufficiency of which are hereby
acknowledged, it is mutually covenanted and agreed, for the equal proportionate
benefit of all Holders of the 2005 Notes, as follows:


                                    ARTICLE 1

                          DELETION OF CERTAIN COVENANTS

     Each of Section 10.05 (Limitation on Indebtedness), Section 10.06
(Limitation on Restricted Payments), Section 10.07 (Limitation on Dividend and
Other Payment Restrictions Affecting Restricted Subsidiaries), Section 10.08
(Limitation on the Issuance and Sale of Capital Stock of Restricted
Subsidiaries), Section 10.09 (Limitation on Issuances of Guarantees by
Restricted Subsidiaries), Section 10.10 (Limitation on Transactions with
Shareholders and Affiliates), Section 10.11 (Limitation on Liens), Section 10.12
(Limitation on Sale-Leaseback Transactions), Section 10.13 (Limitation on Asset
Sales), Section 10.14 (Repurchase of 9 5/8% Notes Upon a Change of Control),
Section 10.15 (Existence), Section 10.16 (Payment of Taxes and Other Claims) and
Section 10.17 (Maintenance of Properties and Insurance) of the Indenture
(collectively, together with Section 8.01 and Sections 5.01(c) through Section
5.01(h) of the Indenture, the "Designated Provisions") is hereby deleted in its
entirety and replaced with "Intentionally Omitted".


                                    ARTICLE 2

                            AMENDMENT OF SECTION 8.01

     Each of paragraphs (iii), (iv) and (v) of Section 8.01 (Consolidation,
Merger, Conveyance or Transfer on Certain Terms) of the Indenture is hereby
deleted in its entirety.







                                    ARTICLE 3

                    ELIMINATION OF CERTAIN EVENTS OF DEFAULT

     Notwithstanding any provision in the Indenture to the contrary, each of
paragraphs (c), (d), (e), (f), (g) and (h) of Section 5.01 (Events of Default)
of the Indenture is hereby deleted in its entirety.


                                    ARTICLE 4

                         DELETION OF CERTAIN DEFINITIONS

     Notwithstanding any provision in the Indenture to the contrary, the
definition in the Indenture of each capitalized term which occurs only within
the Designated Provisions as in effect prior to the execution of this Third
Supplemental Indenture shall be deleted from the Indenture and shall be of no
force or effect.


                                    ARTICLE 5

                                  MISCELLANEOUS

     SECTION 5.01. The Trustee accepts the trusts created by the Indenture, as
supplemented by this Third Supplemental Indenture, and agrees to perform the
same upon the terms and conditions of the Indenture, as supplemented by this
Third Supplemental Indenture.

     SECTION 5.02. All capitalized terms used and not defined herein shall have
the respective meanings assigned to them in the Indenture.

     SECTION 5.03. Each of the Company, the Guarantors and the Trustee hereby
confirms and reaffirms the Indenture in every particular except as amended by
this Third Supplemental Indenture.

     SECTION 5.04. All covenants and agreements in this Third Supplemental
Indenture by the Company or the Trustee shall bind their respective successors
and assigns, whether so expressed or not.

     SECTION 5.05. In case any provisions in this Third Supplemental Indenture
shall be invalid, illegal or unenforceable, the validity, legality and
enforceability of the remaining provisions shall not in any way be affected or
impaired thereby.

     SECTION 5.06. Nothing in this Third Supplemental Indenture, express or
implied, shall give to any Person, other than the parties hereto and their
successors under the Indenture and the Holders of the 2005 Notes, any benefit or
any legal or equitable right, remedy or claim under the Indenture.

     SECTION 5.07. The parties may sign any number of copies of this Third
Supplemental Indenture. Each signed copy shall be an original, but all of them
together represent the same agreement. One signed copy is enough to prove this
Third Supplemental Indenture.

     SECTION 5.08. This Third Supplemental Indenture shall be governed by, and
construed in accordance with, the laws of the State of New York but without
giving effect to applicable principles of conflicts of law to the extent that
the application of the laws of another jurisdiction would be required thereby.

     SECTION 5.09. All provisions of this Third Supplemental Indenture shall be
deemed to be incorporated in, and made a part of, the Indenture; and the
Indenture, as supplemented by this Third Supplemental Indenture, shall be read,
taken and construed as one and the same instrument.

     SECTION 5.10. The Trustee shall not be responsible in any manner whatsoever
for or in respect of the validity or sufficiency of this Third Supplemental
Indenture or for or in respect of the recitals contained herein, all of which
are made solely by the Company.


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     IN WITNESS WHEREOF, the parties have caused this Third Supplemental
Indenture to be duly executed as of the date first written above.


                                        ATA HOLDINGS CORP.


                                        By /s/ David Wing
                                           -------------------------------------
                                           Name:  David M. Wing
                                           Title: Executive Vice Presicent & CFO


                                        ATA AIRLINES, INC.


                                        By /s/ David Wing
                                           -------------------------------------
                                           Name:  David M. Wing
                                           Title: Executive Vice President & CFO


                                        AMBASSADAIR TRAVEL CLUB, INC.


                                        By /s/ David Wing
                                           -------------------------------------
                                           Name:  David M. Wing
                                           Title: Executive Vice President & CFO


                                        ATA LEISURE CORP.


                                        By /s/ David Wing
                                           -------------------------------------
                                           Name:  David M. Wing
                                           Title: Executive Vice President & CFO


                                        AMBER TRAVEL, INC.


                                        By /s/ David Wing
                                           -------------------------------------
                                           Name:  David M. Wing
                                           Title: Executive Vice President & CFO


                                        AMERICAN TRANS AIR TRAINING CORP.


                                        By /s/ David Wing
                                           -------------------------------------
                                           Name:  David M. Wing
                                           Title: Executive Vice President & CFO


                                        AMERICAN TRANS AIR EXECUJET, INC.


                                        By /s/ David Wing
                                           -------------------------------------
                                           Name:  David M. Wing
                                           Title: Executive Vice President & CFO


                                        ATA CARGO, INC.


                                        By /s/ David Wing
                                           -------------------------------------
                                           Name:  David M. Wing
                                           Title: Executive Vice President & CFO


                                        CHICAGO EXPRESS AIRLINES, INC.


                                        By /s/ George Mikelsons
                                           -------------------------------------
                                           Name:  J. George Mikelsons
                                           Title: Chairman, President & CEO


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                                        WELLS FARGO BANK NORTHWEST, NATIONAL
                                        ASSOCIATION, as Trustee


                                        By /s/ Michael Hoggan
                                           -------------------------------------
                                           Name:  Michael D. Hoggan
                                           Title: Vice President




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