For period ended 12/31/2003 Registrant Name: American AAdvantage Funds File Number: 811-4984 EX-99.906CERT William F. Quinn and Rebecca L. Harris, respectively, the President and Treasurer of the American AAdvantage Funds (the "Registrant"), each certify to the best of his or her knowledge and belief that: 1. the Registrant's report on Form N-CSR for the period ended December 31, 2003 (the "Form N-CSR") fully complies with the requirements of Section 15(d) of the Securities Exchange Act of 1934, as amended; and 2. the information contained in such Form N-CSR fairly presents, in all material respects, the financial condition and results of operations of the Registrant. /s/ William F. Quinn /s/ Rebecca L. Harris - -------------------- --------------------- William F. Quinn Rebecca L. Harris President Treasurer American AAdvantage Funds American AAdvantage Funds Date: March 9, 2004 A signed original of this written statement required by Section 906 has been provided to American AAdvantage Funds and will be retained by American AAdvantage Funds and furnished to the Securities and Exchange Commission or its staff upon request.