You are able to make changes on the details of your American Airlines ticket up until two hours prior to the time when the plane leaves. If you bought tickets through a third party you may make adjustments to the reservation you have made through American Airlines. To change the details of your American Airlines flight Change via AA.com Follow the steps below. Then, sign in to AA.comThen, click Next, click Manage Trip or Check In, and fill in the required fields to gain access to your itinerary.After you've filled out the application, click on the "Find your trip" button.The details of your journey are displayed on screen. Click the View/Change icon on the right side of the flight you want to change.Follow these steps to alter your flight reservation.If you're unable to change or view your options, please contact American Reservations at American Airlines.If you're ready to book a flight that was cancelled go to the Manage Check-in/Trips area. Choose View Cancelled Trip from the drop-down menu. If you need assistance, call the American Airlines' flight change number. Read Also: Alaska Flight Change | United Flight Change | British Airways Flight Change