US Airways allows passengers to check in as early as 24 hours before the scheduled flight. Travelers can check in online until 45 minutes before the scheduled departure time for domestic flights. Passengers on international flights can check in until 90 minutes before the flight departure time.
US Airways passengers have the option of checking in on the website or on the US Airways mobile app. The 24-hour check-in window is the same for either option. Checking in online before the flight saves the traveler time at the airport. If the traveler chooses a mobile boarding pass during the check-in process, he proceeds directly to the security checkpoint at the airport.