[2] Allegheny Airlines began as All American Aviation Company providing mail delivery starting on March 7, 1939.

[4] In 1953, Allegheny's network blanketed Pennsylvania, reaching Newark NJ to Cleveland and Huntington WV.

When Rolls-Royce bought Napier it dropped the Eland, so 540s in the United States reverted to piston; Allegheny's last 540 flights were in 1962.

The airline switched to General Motors/Allison turboprops in the Convair 580 which the carrier named the "Vistacruiser", the first CV580 flight was in June 1965.

As deregulation dawned, Allegheny, looking to shed its regional image, changed its name to USAir on October 28, 1979.

[citation needed] It recently was on an Airbus A319 registered N745VJ, before being repainted into standard American livery in March 2023 and US Airways also operated this aircraft with a retro Allegheny Airlines paint scheme.

Allegheny flew to dozens more cities at some point, including Erie, Providence and the Wyoming Valley.