UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                SCHEDULE 13D/A-9

                    Under the Securities Exchange Act of 1934
                               (Amendment No. 9)*


                         REPUBLIC AIRWAYS HOLDINGS INC.
                    -------------------------------------------
                                (Name of issuer)

                     Common Stock, $.001 Par Value Per Share
                ------------------------------------------------
                         (Title of class of securities)

                                   760276 10 5
                            -------------------------
                                 (CUSIP number)

                              Arthur H. Amron, Esq.
                               Wexford Capital LLC
                             411 West Putnam Avenue
                               Greenwich, CT 06830
                                 (203) 862-7012
   -------------------------------------------------------------------------
           (Name, address and telephone number of person authorized to
                      receive notices and communications)

                               September 11, 2007
             -------------------------------------------------------
             (Date of event which requires filing of this statement)

If the filing person has previously filed a statement on Schedule 13G to report
the acquisition that is the subject of this Schedule 13D, and is filing this
schedule because of ss.ss.240.13d-1(e), 240.13d-1(f) or 240.13d-1(g), check the
following box [ ].

Note: Schedules filed in paper format shall include a signed original and five
copies of the schedule, including all exhibits. See ss.240.13d-7 for other
parties to whom copies are to be sent.

*The remainder of this cover page shall be filled out for a reporting person's
initial filing on this form with respect to the subject class of securities, and
for any subsequent amendment containing information which would alter
disclosures provided in a prior cover page.

The information required on the remainder of this cover page shall not be deemed
to be "filed" for the purpose of Section 18 of the Securities Exchange Act of
1934 ("Act") or other subject to the liabilities of that section of Act but
shall be subject to all other provisions of the Act (however, see the Notes).


                                                               Page 1 of 8 Pages



CUSIP No. 760276 10 5


----------------------------------------------------------------------------------------------------------------------

1.    Names of Reporting Persons.                                                                      WexAir RJET LLC
      I.R.S. Identification Nos. of Above Persons (entities only)  06-1497977                       (f/k/a WexAir LLC)

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2.    Check the Appropriate Box if a Member of a Group                                                         (a) [ ]
      (See Instructions)                                                                                       (b) [ ]

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3.    SEC Use Only

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4.    Source of Funds (See Instructions)                                                                            OO

----------------------------------------------------------------------------------------------------------------------
5.    Check if Disclosure of Legal Proceedings is
      Required Pursuant to Items 2(d) or 2(e)                                                                      [ ]

----------------------------------------------------------------------------------------------------------------------
6.    Citizenship or Place of Organization                                                                    Delaware

----------------------------------------------------------------------------------------------------------------------
      Number of Shares         7.     Sole Voting Power                                                      1,556,063
      Beneficially
      Owned by Each            ---------------------------------------------------------------------------------------
      Reporting                8.     Shared Voting Power (see Item 5 below)                                         0
      Person With
                               ---------------------------------------------------------------------------------------
                               9.     Sole Dispositive Power                                                 1,556,063

                               ---------------------------------------------------------------------------------------
                               10.    Shared Dispositive Power (see Item 5 below)                                    0

----------------------------------------------------------------------------------------------------------------------
11.   Aggregate Amount Beneficially
      Owned by Each Reporting Person                                                                         1,556,063

----------------------------------------------------------------------------------------------------------------------
12.   Check if the Aggregate Amount in Row (11) Excludes
      Certain Shares (See Instructions)                                                                            [ ]

----------------------------------------------------------------------------------------------------------------------
13.   Percent of Class Represented by Amount in Row (11)                                                          4.0%

----------------------------------------------------------------------------------------------------------------------
14.   Type of Reporting Person (See Instructions)                                                                   OO

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                                                               Page 2 of 8 Pages



CUSIP No. 760276 10 5


----------------------------------------------------------------------------------------------------------------------

1.    Names of Reporting Persons.                                                                  Wexford Capital LLC
      I.R.S. Identification Nos. of Above Persons (entities only) 06-1442624

----------------------------------------------------------------------------------------------------------------------
2.    Check the Appropriate Box if a Member of a Group                                                         (a) [ ]
      (See Instructions)                                                                                       (b) [ ]

----------------------------------------------------------------------------------------------------------------------
3.    SEC Use Only

----------------------------------------------------------------------------------------------------------------------
4.    Source of Funds (See Instructions)                                                                            OO

----------------------------------------------------------------------------------------------------------------------
5.    Check if Disclosure of Legal Proceedings is
      Required Pursuant to Items 2(d) or 2(e)                                                                      [ ]

----------------------------------------------------------------------------------------------------------------------
6.    Citizenship or Place of Organization                                                                 Connecticut

----------------------------------------------------------------------------------------------------------------------
      Number of Shares         7.     Sole Voting Power                                                         32,500
      Beneficially
      Owned by Each            ---------------------------------------------------------------------------------------
      Reporting                8.     Shared Voting Power (see Item 5 below)                                 1,556,063
      Person With
                               ---------------------------------------------------------------------------------------
                               9.     Sole Dispositive Power                                                    32,500

                               ---------------------------------------------------------------------------------------
                               10.    Shared Dispositive Power (see Item 5 below)                            1,556,063

----------------------------------------------------------------------------------------------------------------------
11.   Aggregate Amount Beneficially
      Owned by Each Reporting Person                                                                         1,588,563

----------------------------------------------------------------------------------------------------------------------
12.   Check if the Aggregate Amount in Row (11) Excludes
      Certain Shares (See Instructions)                                                                            [ ]

----------------------------------------------------------------------------------------------------------------------
13.   Percent of Class Represented by Amount in Row (11)                                                          4.1%

----------------------------------------------------------------------------------------------------------------------
14.   Type of Reporting Person (See Instructions)                                                                   OO

----------------------------------------------------------------------------------------------------------------------



                                                               Page 3 of 8 Pages



CUSIP No. 760276 10 5


----------------------------------------------------------------------------------------------------------------------

1.    Names of Reporting Persons.                                                                  Charles E. Davidson
      I.R.S. Identification Nos. of Above Persons (entities only)
      (Intentionally Omitted)

----------------------------------------------------------------------------------------------------------------------
2.    Check the Appropriate Box if a Member of a Group                                                         (a) [ ]
      (See Instructions)                                                                                       (b) [ ]

----------------------------------------------------------------------------------------------------------------------
3.    SEC Use Only

----------------------------------------------------------------------------------------------------------------------
4.    Source of Funds (See Instructions)                                                                            OO

----------------------------------------------------------------------------------------------------------------------
5.    Check if Disclosure of Legal Proceedings is
      Required Pursuant to Items 2(d) or 2(e)                                                                      [ ]

----------------------------------------------------------------------------------------------------------------------
6.    Citizenship or Place of Organization                                                               United States

----------------------------------------------------------------------------------------------------------------------
      Number of Shares         7.     Sole Voting Power                                                              0
      Beneficially
      Owned by Each            ---------------------------------------------------------------------------------------
      Reporting                8.     Shared Voting Power (see Item 5 below)                                 1,588,563
      Person With
                               ---------------------------------------------------------------------------------------
                               9.     Sole Dispositive Power                                                         0

                               ---------------------------------------------------------------------------------------
                               10.    Shared Dispositive Power (see Item 5 below)                            1,588,563

----------------------------------------------------------------------------------------------------------------------
11.   Aggregate Amount Beneficially
      Owned by Each Reporting Person                                                                         1,588,563

----------------------------------------------------------------------------------------------------------------------
12.   Check if the Aggregate Amount in Row (11) Excludes
      Certain Shares (See Instructions)                                                                            [ ]

----------------------------------------------------------------------------------------------------------------------
13.   Percent of Class Represented by Amount in Row (11)                                                          4.1%

----------------------------------------------------------------------------------------------------------------------
14.   Type of Reporting Person (See Instructions)                                                                   IN

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                                                               Page 4 of 8 Pages



CUSIP No. 760276 10 5


----------------------------------------------------------------------------------------------------------------------

1.    Names of Reporting Persons.                                                                     Joseph M. Jacobs
      I.R.S. Identification Nos. of Above Persons (entities only)
      (Intentionally Omitted)

----------------------------------------------------------------------------------------------------------------------
2.    Check the Appropriate Box if a Member of a Group                                                         (a) [ ]
      (See Instructions)                                                                                       (b) [ ]

----------------------------------------------------------------------------------------------------------------------
3.    SEC Use Only

----------------------------------------------------------------------------------------------------------------------
4.    Source of Funds (See Instructions)                                                                            OO

----------------------------------------------------------------------------------------------------------------------
5.    Check if Disclosure of Legal Proceedings is
      Required Pursuant to Items 2(d) or 2(e)                                                                      [ ]

----------------------------------------------------------------------------------------------------------------------
6.    Citizenship or Place of Organization                                                               United States

----------------------------------------------------------------------------------------------------------------------
      Number of Shares         7.     Sole Voting Power                                                              0
      Beneficially
      Owned by Each            ---------------------------------------------------------------------------------------
      Reporting                8.     Shared Voting Power (see Item 5 below)                                 1,588,563
      Person With
                               ---------------------------------------------------------------------------------------
                               9.     Sole Dispositive Power                                                         0

                               ---------------------------------------------------------------------------------------
                               10.    Shared Dispositive Power (see Item 5 below)                            1,588,563

----------------------------------------------------------------------------------------------------------------------
11.   Aggregate Amount Beneficially
      Owned by Each Reporting Person                                                                         1,588,563

----------------------------------------------------------------------------------------------------------------------
12.   Check if the Aggregate Amount in Row (11) Excludes
      Certain Shares (See Instructions)                                                                            [ ]

----------------------------------------------------------------------------------------------------------------------
13.   Percent of Class Represented by Amount in Row (11)                                                          4.1%

----------------------------------------------------------------------------------------------------------------------
14.   Type of Reporting Person (See Instructions)                                                                   IN

----------------------------------------------------------------------------------------------------------------------



                                                               Page 5 of 8 Pages



         This Amendment No. 9 to Schedule 13D modifies and supplements the
Schedule 13D initially filed on November 7, 2005, and amended by Amendment No. 1
to Schedule 13D filed on November 21, 2005, Amendment No. 2 to Schedule 13D
filed on December 19, 2004, Amendment No. 3 to Schedule 13D filed on January 4,
2006, Amendment No. 4 to Schedule 13D filed on May 9, 2006, Amendment No. 5 to
Schedule 13D filed on August 16, 2006, Amendment No. 6 to Schedule 13D filed on
August 21, 2006, Amendment No. 7 to Schedule 13D filed on March 21, 2007 and
Amendment No. 8 to Schedule 13D filed on September 6, 2007 (as amended, the
"Statement"), with respect to the common stock, $0.001 par value per share (the
"Common Stock"), of Republic Airways Holdings Inc., a Delaware corporation (the
"Company"). Except to the extent supplemented by the information contained in
this Amendment No. 9, the Statement, as amended as provided herein, remains in
full force and effect. Capitalized terms used herein without definition have the
respective meanings ascribed to them in the Statement.

ITEM 5.  INTEREST IN SECURITIES OF THE ISSUER.

         Since the date of the Statement, the Reporting Persons sold 1,000,000
shares of Common Stock on September 11, 2007 in a private transaction with the
Issuer at a price of $20.20 per share. As a result of the foregoing, the
aggregate number and percentage (on the basis of 38, 278,087 shares of Common
Stock issued and outstanding, which, based upon information provided by the
Company, is the number of shares issued and outstanding following the foregoing
transaction) of shares of Common Stock beneficially owned by the Reporting
Persons are as follows:

         WexAir RJET LLC (f/k/a Wexair LLC):
         (a)    Amount beneficially owned:  1,556,063
         (b)    Percent of class: 4.0%
         (c)    Number of shares as to which the person has:
                (i)    Sole power to vote or to direct the vote:  1,556,063
                (ii)   Shared power to vote or to direct the vote:  0
                (iii)  Sole power to dispose or to direct the disposition
                        of: 1,556,063
                (iv)   Shared power to dispose or to direct the disposition
                        of:  0

         Wexford Capital LLC:
         (a)    Amount beneficially owned:  1,588,563
         (b)    Percent of class: 4.1%
         (c)    Number of shares as to which the person has:
                (i)    Sole power to vote or to direct the vote:  32,500
                (ii)   Shared power to vote or to direct the vote:  1,556,063
                (iii)  Sole power to dispose or to direct the disposition
                        of:  32,500
         `      (iv)   Shared power to dispose or to direct the disposition
                        of:  1,556,063

         Charles E. Davidson:
         (a)    Amount beneficially owned:  1,588,563
         (b)    Percent of class: 4.1%
         (c)    Number of shares as to which the person has:
                (i)    Sole power to vote or to direct the vote:  0
                (ii)   Shared power to vote or to direct the vote:  1,588,563
                (iii)  Sole power to dispose or to direct the disposition of: 0
         `      (iv)   Shared power to dispose or to direct the disposition
                        of:   1,588,563

         Joseph M. Jacobs:
         (a)    Amount beneficially owned:  1,588,563
         (b)    Percent of class: 4.1%
         (c)    Number of shares as to which the person has:
                (i)    Sole power to vote or to direct the vote:  0
                (ii)   Shared power to vote or to direct the vote:  1,588,563
                (iii)  Sole power to dispose or to direct the disposition of: 0
                (iv)   Shared power to dispose or to direct the disposition
                        of:  1,588,563

         Wexford Capital may, by reason of its status as managing member of
WexAir, be deemed to own beneficially the shares of Common Stock of which WexAir
possesses beneficial ownership. Each of Charles E. Davidson and Joseph M. Jacobs
may, by reason of his status as a controlling person of Wexford Capital, be
deemed to own beneficially the shares of Common Stock of which WexAir and
Wexford Capital possesses beneficial ownership. Each of Charles E.


                                                               Page 6 of 8 Pages



Davidson, Joseph M. Jacobs and Wexford Capital shares the power to vote and to
dispose of the shares of Common Stock beneficially owned by WexAir and Wexford
Capital. Each of Messrs. Davidson and Jacobs disclaims beneficial ownership of
the shares of Common Stock owned by WexAir and Wexford Capital and Wexford
Capital disclaims beneficial ownership of the shares of Common Stock owned by
WexAir, and this report shall not be deemed as an admission that they are the
beneficial owners of such securities except in the case of Messrs. Davidson and
Jacobs to the extent of their interests in each member of WexAir.

         Except as set forth above, the Reporting Persons have not effected any
transactions in the Common Stock during the 60 days preceding the date of this
Amendment No. 9 to Schedule 13D.

                                    * * * * *


                                                               Page 7 of 8 Pages



                                    SIGNATURE

         After reasonable inquiry and to the best of each of the undersigned's
knowledge and belief, each of the undersigned certifies that the information set
forth in this statement is true, complete and correct.

Dated: September 12, 2007

                                     WEXAIR RJET LLC

                                     By:   /s/ Arthur H. Amron
                                           -------------------------------
                                           Name:  Arthur H. Amron
                                           Title: Vice President and
                                                  Assistant Secretary


                                     WEXFORD CAPITAL LLC

                                     By:   /s/ Arthur H. Amron
                                           -------------------------------
                                           Name:  Arthur H. Amron
                                           Title: Partner and Secretary


                                     /s/ Charles E. Davidson
                                     -------------------------------------
                                     CHARLES E. DAVIDSON


                                     /s/ Joseph M. Jacobs
                                     -------------------------------------
                                     JOSEPH M. JACOBS


                                                               Page 8 of 8 Pages