You can call reservations or access your reservation online if you need to change a current flight. Here's How to make a american airlines flight change online: On the homepage of aa.com, look for "Manage trips/Check-in." To make your required modifications, enter your record locator number and seek for the "Change trip" option. In "My trips/Check-in," AAdvantage members can log in and make changes to their reservations. Simply find the "Change trip" option after logging in.

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