Orbitz Worldwide SC 13D Orbitz Worldwide / TDS Investor ownership change

Exhibit 99.1

SCHEDULE 13D JOINT FILING AGREEMENT

     In accordance with the requirements of Rule 13d-1(k) under the Securities Exchange Act of 1934, as amended, and subject to the limitations set forth therein, the parties set forth below agree to jointly file the Schedule 13D to which this joint filing agreement is attached, and have duly executed this joint filing agreement as of the date set forth below. Each party to the agreement expressly authorizes each other party to file on its behalf any and all amendments to such statement. Each party to this agreement agrees that this joint filing agreement may be signed in counterparts.

     Date: January 28, 2010

TDS INVESTOR (LUXEMBOURG) S.A.R.L.
By: Name:	/s/ Rochelle J. BoasRochelle J. Boas
Title:	Manager
TDS INVESTOR (CAYMAN) L.P.
By: TDS INVESTOR (CAYMAN) G.P. LTD.,
as General Partner
By: Name:	/s/ Rochelle J. BoasRochelle J. Boas
Title:	Group Vice President and Corporate Secretary
TDS INVESTOR (CAYMAN) GP LTD.
By: Name:	/s/ Rochelle J. BoasRochelle J. Boas
Title:	Group Vice President and Corporate Secretary

BLACKSTONE CAPITAL PARTNERS
(CAYMAN) V L.P.
By:	BLACKSTONE MANAGEMENT ASSOCIATES (CAYMAN) V L.P.
	as General Partner
By: Name:	/s/ Robert L. FriedmanRobert L. Friedman
Title:	Director
BLACKSTONE MANAGEMENT ASSOCIATES
(CAYMAN) V L.P.
By:	BLACKSTONE LR ASSOCIATES (CAYMAN) V LTD., as General Partner
By: Name:	/s/ Robert L. FriedmanRobert L. Friedman
Title:	Director
BLACKSTONE LR ASSOCIATES (CAYMAN) V LTD.
By: Name:	/s/ Robert L. FriedmanRobert L. Friedman
Title:	Director
STEPHEN A. SCHWARZMAN
/s/ Stephen A. Schwarzman