UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                              WASHINGTON, DC 20549

                                    FORM 8-K

                             CURRENT REPORT PURSUANT
                          TO SECTION 13 OR 15(D) OF THE
                         SECURITIES EXCHANGE ACT OF 1934


     Date of report (Date of earliest event reported) May 12, 2005

                               ATA Holdings Corp.
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             (Exact Name of Registrant as Specified in Its Charter)

                                     Indiana
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                 (State or Other Jurisdiction of Incorporation)

             000-21642                                      35-1617970
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     (Commission File Number)                  (IRS Employer Identification No.)

         7337 West Washington Street
           Indianapolis, Indiana                                        46231
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     (Address of Principal Executive Offices)                         (Zip Code)

                                 (317) 247-4000
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              (Registrant's Telephone Number, Including Area Code)

                                 Not Applicable
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          (Former Name or Former Address, if Changed Since Last Report)

     Check the appropriate box below if the Form 8-K filing is intended to
     simultaneously satisfy the filing obligation of the registrant under any of
the following provisions (see General Instruction A.2. below):

     |_| Written  communications  pursuant to Rule 425 under the  Securities Act
(17 CFR 230.425)

     |_| Soliciting  material pursuant to Rule 14a-12 under the Exchange Act (17
CFR 240.14a-12)

     |_|  Pre-commencement  communications  pursuant to Rule 14d-2(b)  under the
Exchange Act (17 CFR 240.14d-2(b))

     |_|  Pre-commencement  communications  pursuant to Rule 13e-4(c)  under the
Exchange Act (17 CFR 240.13e-4(c))



Item 1.01                  Entry into a Material Definitive Agreement.

     On December 23, 2004,  ATA Holdings  Corp.  (the  "Company")  and Southwest
Airlines  Co.  ("Southwest")  executed  a document  entitled  "Bid  Proposal  to
Purchase  From,  Provide a DIP Facility and Exit Facility To, and Codeshare With
ATA  Holdings  Corp."  which  was  dated  as of  December  22,  2004  (the  "Bid
Proposal"),  by which  Southwest  agreed,  among  other  things,  to provide the
Company's subsidiary,  ATA Airlines,  Inc. ("ATA"), with a  debtor-in-possession
loan facility of up to $47 million. As required by the Bid Proposal, on December
23, 2004, ATA and Southwest entered into a Secured  Debtor-In-Possession  Credit
and Security  Agreement  dated as of December 22, 2004 (the "DIP Facility") that
provides up to $40 million in cash to ATA plus a guaranty by  Southwest of up to
$7  million.  During  the term of the DIP  Facility,  ATA is  subject to certain
financial covenants.

     On  February  3,  2005,  Southwest  and the  Company  entered  into a First
Amendment  to  Credit  Agreement  (the  "First  Amendment").   Under  the  First
Amendment,  the DIP Facility  was amended by changing the starting  date for the
periods in which the Minimum Consolidated EBITDARR and Minimum Adjusted EBITDARR
financial covenants are effective from January 1, 2005, to February 1, 2005.

         On February 28, 2005, Southwest and the Company entered into a Second
Amendment to Credit Agreement (the "Second Amendment"). Under the Second
Amendment, the DIP Facility was amended by changing the starting date for the
periods in which the Minimum Consolidated EBITDARR and Minimum Adjusted EBITDARR
financial covenants are effective from February 1, 2005, to March 1, 2005.

     On April 15, 2005, Southwest and the Company entered into a Third Amendment
to Credit Agreement (the "Third Amendment").  Under the Third Amendment, the DIP
Facility was amended by changing the starting  date for the periods in which the
Minimum Consolidated  EBITDARR and Minimum Adjusted EBITDARR financial covenants
are effective from March 1, 2005, to April 1, 2005.

     On May 12, 2005,  Southwest and the Company entered into a Fourth Amendment
to Credit Agreement (the "Fourth  Amendment").  Under the Fourth Amendment,  the
DIP Facility was amended by changing the starting  date for the periods in which
the Minimum  Consolidated  EBITDARR  and  Minimum  Adjusted  EBITDARR  financial
covenants are effective from April 1, 2005, to May 1, 2005.

     The First Amendment, Second Amendment, Third Amendment and Fourth Amendment
(collectively  the  "Amendments")  were  subject  to  the  consent  of  the  Air
Transportation  Stabilization Board and the Official Creditors Committee for ATA
in its Chapter 11 case,  both of which  consented  to each of these  Amendments.
Without the  Amendments,  the Company  would not now be in  compliance  with the
financial covenants in the DIP Facility.




                                   SIGNATURES

     Pursuant to the  requirements  of the Securities  Exchange Act of 1934, the
registrant  has duly  caused  this  report  to be  signed  on its  behalf by the
undersigned hereunto duly authorized.

                              ATA Holdings Corp.


Date: May 17, 2005   By:      /s/Brian T. Hunt
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                              Name: Brian T. Hunt
                              Title: Senior Vice President & General Counsel