From The Airport Wiki

US Airways is an American low-cost airline[1] headquartered in Tempe, Arizona, owned by US Airways Group, Inc. The airline is the sixth largest airline in the United States, and the largest low cost/low fare carrier in the United States by number of destinations. Including aircraft operated by its America West Airlines affiliate, US Airways has a fleet of 357 mainline jet aircraft and 352 "express" (regional jet and turbo-prop) aircraft connecting 240 destinations in North America, Central America, the Caribbean, Hawaii, and Europe. As of February 2007, US Airways employs 37,675 people worldwide and operates 3,860 daily flights.

US Airways operates primary hubs in Charlotte, Philadelphia, Phoenix and Las Vegas, with the latter two being former America West hubs. US Airways also maintains focus city operations at Washington Reagan National, New York LaGuardia, Pittsburgh and Boston.[2]

The airline operates the US Airways Shuttle, a US Airways brand which provides hourly service between key Northeastern markets. Regional airline service is branded as US Airways Express, operated by contract and subsidiary airline companies.

US Airways also has a partnership with Midwest Airlines in Kansas City. US Airways allows for code sharing in Kansas City with Midwest to select destinations in Arkansas, Kansas, Missouri, and Nebraska. US Airways Express serves smaller rural communities from Kansas City and uses the Midwest Airlines hub traffic to help fill the seats on these flights.