Cancelling Flight Bookings: American Airlines Manage Booking option allows you to cancel your flight bookings if you are caught up in some unavoidable circumstances which don't leave any scope for you to continue with your travel plans. If you cancel your flight reservations within 24 hours of booking it, then you will have to pay any charges for cancelling your flight and also, you will be receiving the complete amount back which you paid at the time of reservation. Which cancellation policy will be applicable depends on what kind of ticket you have purchased. So make sure that you thoroughly go through the cancellation policy once so that you are completely aware of how things work out when you are cancelling the flight.