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.
Your airline's website will also have specific information about the number and size of bags allowed, as well as information about any applicable fees. Most airlines recommend passengers check in at minimum 2 hours prior to a domestic flight and 2 1/2 hours prior to an international flight. Please check with your airline for its specific check-in requirements.