Piedmont Airlines requested and received philatelic treatment for covers on the occasion of new scheduling between Miami, Charlotte and Asheville on April 29-30, 1979. 

No cachet was provided for the inaugural flights but the airline requested, and the USPS authorized, philatelic treatment for inaugural mail.

A Boeing 737 aircraft was used for the inaugural flights.

This cover was carried on the inaugural Piedmont Airlines flight from Charlotte, North Carolina to Miami, Florida (where it was backstamped) and is listed in The American Air Mail Catalogue as PI-D19S.

The USAir (later renamed USAirways) purchase of Piedmont Airlines was approved by the Department of Transportation. The sale was completed in October 1987. The two airlines operated separately until August 5, 1989, when all operations and schedules were integrated. Piedmont ceased to exist on August 5.

US Airways was a major American airline that ceased to operate independently when the Federal Aviation Administration granted a single operating certificate for US Airways and American Airlines on April 8, 2015.