Utilizing the Myrtle Beach Air Force Base, Piedmont Airlines began Boeing 737 service to New York on July 9, 1975. 

No cachet was provided for the inaugural mail.

This cover was carried on the inaugural Piedmont Airlines flight from Myrtle Beach, South Carolina to LaGuardia Airport in New York (where it was backstamped).

The Myrtle Beach Philatelic Mail Clerk autographed the cover.

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.