How do i contact american airlines aadvantage customer service? Contacting American Airlines AAdvantage - by phone or otherwise. While 800-882-8880 is American Airlines AAdvantage's best toll-free number, it is also the only way to get in touch with them.Is the aadvantage customer service office open 24 hours? While the Executive Platinum desk is manned 24/7, the AAdvantage Customer Service line is only open from Monday-Friday from 8am-7pm Central Time. That’s why he’s getting this message about the office being closed.Where can i find the aadvantage program terms and conditions? For full AAdvantage program terms and conditions, visit aa.com/aadvantageterms. American Airlines, American Eagle, AAdvantage, Platinum Pro and the Flight Symbol logo are marks of American Airlines, Inc. one world ® is a mark of the one world Alliance, LLC.What do i do if my aadvantage account number doesnt work? If you continue to get this error, I’d recommend calling the general reservations line (800-433-7300) and then not providing your AAdvantage account number when prompted. Unfortunately, you’ll likely have to wait longer to reach an agent than if you called the elite help desk.