Awards (vs revenue tickets) have very clear rules for cancellations:
- Cancellations to the original ticket purchased 2 or more days prior to departure will have up to 24 hours from the time it’s ticketed to be eligible for a full ticket refund including the reinstatement of award miles, co-payment amount paid and AAdvantage award processing fee. If you cancel the ticket on aa.com, you must call Reservations to request the reinstatement of award miles and refund of any co-payment or processing fee paid.