Want to know how to change your American Airlines flight? The American Airlines change flight process is quite straightforward. To change or rebook your flight, visit the airline's official site and scroll to “Manage Trips/ Check-in.” Enter all your details and click “ Change Flight.” If you are an AA member, the process is much simpler. Just log in to your account, click “Change Trip” and make the desired changes. Passengers can also call American Airlines reservation at 800‑433‑7300 to change flights.