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:
Company;
to state a material fact necessary to make the statements made, in light of the circumstances under
which such statements were made, not misleading with respect to the period covered by this report;
report, fairly present in all material respects the financial condition, results of operations and cash
flows of the Company as of, and for, the periods presented in this report;
controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal
control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the
Company and have:
and procedures to be designed under our supervision, to ensure that material information
relating to the Company, including its consolidated subsidiaries, is made known to us by
others within those entities, particularly during the period in which this report is being
prepared;
over financial reporting to be designed under our supervision, to provide reasonable
assurance regarding the reliability of financial reporting and the preparation of financial
statements for external purposes in accordance with generally accepted accounting
principles;
presented in this report our conclusions about the effectiveness of the disclosure controls
and procedures, as of the end of the period covered by this report based on such
evaluation; and
reporting that occurred during the Company's most recent fiscal quarter that has
materially affected, or is reasonably likely to materially affect, the Company's internal
control over financial reporting; and
internal control over financial reporting, to the Company's auditors and the audit committee of
Company's board of directors (or persons performing the equivalent functions):
control over financial reporting which are reasonably likely to adversely affect the
Company's ability to record, process, summarize and report financial information; and
have a significant role in the Company's internal control over financial reporting.
Glenn F. Tilton
UAL Corporation
Chairman, President and Chief Executive Officer
May 11, 2005