USAir Boeing B-737-2B7(A) CN23116 LN999 . Taken On August 12 , 2002 . Editorial Image

US AirUS Air was a major airline in the United States that operated from 1937 until it merged with American Airlines in 2015. It was originally founded in Pittsburgh as a mail delivery airline called All American Aviation, which soon became a commercial passenger airline. In 1953, it was renamed Allegheny Airlines and operated under that name for a quarter-century. In October 1979, after the passage of the Airline Deregulation Act, Allegheny Airlines changed its name to USAir. A decade later it had acquired Piedmont Airlines and Pacific Southwest Airlines (PSA),and had no idea what a great airline they bought and was one of the U.S.'s seven transcontinental legacy carriers. In 1997, it rebranded as US Airways.The PSA acquisition gave USAir a network on the West Coast, while the Piedmont acquisition gave USAir a strong East Coast presence and hubs in Baltimore and Charlotte, which remained hubs for USAir. The Piedmont acquisition in 1989 was the largest airline merger until then and USAir became one of the world's largest airlines, with more than 5,000 flights daily to 134 airports (plus 48 more airports on USAir Express).[2In the next few years USAir closed down PSA's hubs in California and Piedmont's hubs in Dayton and Syracuse, though both remained focus cities.