US Airways plans to launch a mobile app for smartphones and tablets in the coming months. The app is presently in beta-testing stage.
The airline will probably be the last among major US legacy carriers to launch a mobile app as American, United and Delta already have mobile apps.
US Airways is merging with American Airlines with the process expected to be finalized in the third quarter of 2012. Complete integration of the two airlines’ booking and other systems is expected to take at least another 1-2 years.
More information was in an article on the apex.aero blog, which is no longer available.