Use restriction:
Must be booked on aa.com - “This Flight Discount is valid for travel on flights marketed or operated by American Airlines, American Eagle carriers or American Airlines codeshare flights, for
Additional information:
The Flight Discount is redeemable online at aa.com or by calling American Airlines Reservations. A reservations services fee may apply for travel booked through American Airlines Reservations. The Flight Discount is redeemable only toward the purchase of the base airfare and directly associated taxes, fees and charges that are collected as part of the fare calculation for travel. The Flight Discount cannot be used to pay the taxes and charges on mileage redemption tickets where only taxes and fees are being collected.
The Flight Discount may not be used for flight products and/or services that are sold separately or non-flight products and/or services sold by American Airlines.
If the ticket price is greater than the value of the Flight Discount, the difference must be paid only with a credit, debit or charge card. Any unused balance can be applied towards eligible future travel until the stated expiration date. If travel booked with the Flight Discount is cancelled or changed by the credit cardmember, the Flight Discount will be forfeited and the credit cardmember will be responsible for any applicable fare difference and the applicable change fee. The Flight Discount will not be replaced for any reason.