The earliest people can check in for a U.S. Airways flight is 24 hours before their flights depart. The latest they can check in is 45 minutes prior to departure for domestic flights and 90 minutes for international flights.
People can check in online at USAirways.com or in person at the airport. It is also possible to print boarding passes, pay for checked luggage, choose seats and check for possible upgrades online. In order to check in online, fliers will need to enter their dividend miles numbers, ticket numbers or confirmation numbers as well as the departure date and location.