Exhibit 32.2

Certification of United Air Lines, Inc.

Pursuant to 18 U.S.C. 1350

(Section 906 of the Sarbanes-Oxley Act of 2002)

Each undersigned officer certifies that to the best of his knowledge based on a review of the annual report on Form 10-K for the period ended December 31, 2009 of United Air Lines, Inc. (the “Report”):

(1) The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and

(2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of United Air Lines, Inc.

Date: February 25, 2010

/s/ Glenn F. Tilton

Glenn F. Tilton

Chairman and

Chief Executive Officer

/s/ Kathryn A. Mikells

Kathryn A. Mikells

Executive Vice President and

Chief Financial Officer