Exhibit 31.1
Pursuant to 15 U.S.C. 78m(a) or 78o(d)
(Section 302 of the Sarbanes-Oxley Act of 2002)
I, Glenn F. Tilton, the Chairman, President and Chief Executive Officer of UAL Corporation (the "Company"), certify that:
Glenn F. Tilton
UAL Corporation
Chairman, President and Chief Executive Officer
August 1, 2003