SECURITIES AND EXCHANGE COMMISSION
                   Washington, D.C. 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):
                   October 6, 2003

           Atlantic Coast Airlines Holdings, Inc.
     (Exact Name of Registrant as Specified in Charter)



              Delaware      0-21976     13-3621051
              (State or   (Commission      (IRS
                Other         File       Employer
            Jurisdiction    Number)    Identification No.)
                 of
            Incorporation)


   45200 Business Court, Dulles, VA                  20166
   (Address of Principal Executive Offices)     (Zip Code)


 Registrant's telephone number, including area code:  (703)
                          650-6000


                             N/A
    (Former Name or Former Address, if Changed Since Last
                           Report)

Item 9.   Regulation FD Disclosure.

On  October 6, 2003, Atlantic Coast Airlines Holdings,  Inc.
(ACA) (NASDAQ/NM: ACAI) issued a news release concerning its
Response to Unsolicited Offer By  Mesa  Air Group, a copy of
which is attached  hereto  as Exhibit 99 and incorporated
into this Item 9 by reference.

Statements  in this press release and by company  executives
regarding the proposal received by the Company from Mesa Air
Group,  Inc.  and  other matters may contain forward-looking
information  about  the  Company.  A  number  of  risks  and
uncertainties  exist which could cause the Company's  actual
performance  to differ materially from information  provided
by   the  Company  or  its  executives.   These  risks   and
uncertainties include, among others, the costs of  reviewing
and  responding to the unsolicited offer, and other  impacts
of  the offer on the Company's operations.   Other risks and
uncertainties  relating  to  the  Company's   business   and
operations include those referred to in the Company's report
on Form 10-Q for the quarter ended June 30, 2003.



                          SIGNATURE

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

                              ATLANTIC COAST AIRLINES
                              HOLDINGS, INC.




Date:  October 6, 2003        By:     /S/ David W. Asai
                              David W. Asai
                              Vice President, Chief
                              Accounting Officer