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.
Alaska Airlines tightens check-in window. Alaska Airlines is tightening its check-in window, saying customers flying from most its domestic airports now must check in at least 40 minutes prior to departure. Alaska Air says that's regardless if a bag is checked or not. The minimum check-in time for international flights remains at 60 minutes. Previously, the Alaska Air's minimum check-in time had been 30 minutes prior to departure. The airline's customers can check in at the airport, online or via one of the carrier's mobile apps.