The good news is that American Airlines allows you to change your flight reservations. Once you've bought your ticket, you can make adjustments in accordance with American cancellation policy. If you've already reserved your original trip, you can still make adjustments later. If you decide to rebook, you will still be required to pay the price difference between your original ticket and the new price. The airline will provide you travel credit if your substitute flight is less expensive than your original one. The airline will refund your purchase if you are cancelled for any reason, but you will be charged a rebooking fee for the new ticket. If you decide to change your itinerary while using an award ticket, you will be responsible for the change fees. You can cancel the ticket and then rebook it for a later time to avoid paying the change cost. You can Rebook your flight with American Airlines if you bought a refundable ticket.