Need to a recent Cancel American Airlines flight reservation? As many travellers are unsure of what to do next, dealing with travel updates and last-minute flight delays and cancellations can be challenging. Do not be alarmed if you have already made reservations with American Airlines and must cancel because of an unavoidable circumstance. We have your back. You always have the choice to easily modify or cancel your flight reservations. If you used your AAdvantage miles to book American Airlines tickets, you will be required to pay a $150 cancellation fee for the first award and then $25 for each additional award reinstated simultaneously for the same account. for bookings made by Executive Platinum members The award change and reinstatement costs are not charged when customers book their tickets with miles from their account.