American provides a 24-hour cancellation policy +????-????????????.????????????.????????????????. If you book a flight at least seven days before departure and cancel within 24 hours of booking (【 +????-????????????.????????????.???????????????? (????????????) ???????? +????-????????????.????????????.???????????????? (????????????) ???????? +????-????????????.????????????.???????????????? (????????????)】), you are eligible for a full refund without any cancellation fees.