If you are the holder of an AAdvantage MasterCard issued by Citibank, you have the following options to make your monthly credit card payment. You can pay:
- Online: Log in to your account here and make your payment.
- By Mail: Send your payment to the following address: AAdvantage MasterCard / Citibank, P.O. Box 9001006, Louisville KY, 40290-1006
- By Phone: The American Airlines / Citi credit card customer service phone number for payments is 800-733-2654.