Although the process varies state to state, these general steps can help you get started. 1  Replace your birth certificate. Find the vital records office in the state where you were born. 2  Replace your driverâs license. Get this first if you cannot get your birth certificate. 3  Replace your marriage certificate.
The American Airlines website recommends arriving at least 60 minutes early for domestic flights and two hours early for international flights. You must check in at least 30 minutes before a domestic flight and 60 minutes for international flights; otherwise, American Airlines has the right to cancel your ticket.
Online check-in must occur between 24 hours and 60 minutes prior to your flight's scheduled departure time. All that's needed is the passenger last name and the reservation code. Follow the prompts and print your boarding pass. Using this option, you only need to be at the gate within 30 minutes of your flight's departure. You must check in baggage at least 45 minutes prior to departure for domestic flights and 60 minutes prior to international flights.