When you book online at the aa site, where it says "Fare Promotional Code" put in S724V3.
Seems to work for flights anywhere anytime.

found a 5% one too: SC334P .
just search your favorite search engine for "Fare Promotional code"

If the "Fare Promotional Box" doesn't appear on your screen, then you have a Web fare and don't qualify for an extra discounts.

AA Web Site

A 10% discount is good. A 10% discount and a free ticket is g-r-e-a-t!

Fly three qualifying round trips on American, American Eagle or AmericanConnection® between now and September 30, 2003 and get a free round-trip award ticket for travel anywhere we fly within the continental U.S. And, if you fly another three round trips during this time frame, you can get a second free award ticket!

Offer applies to travel on purchased, published fares in First Class, Business Class or Economy Class. Round-trip travel in First Class, Business Class or Full-Fare Economy Class^ have no stay requirements. All other Economy Class round-trip travel may not include a Saturday-night stay.

To qualify for this special offer, you must be an AAdvantage member* and register before September 30, 2003. Registration prior to travel is not required. Register online by entering promotion code AAFLY in the blue box at www.aa.com/offers. You may also register by calling AAdvantage Dial-In® at 1-800-882-8880 and enter Promotion Code AAFLY.