Piedmont Airlines’ second west coast city, San Francisco, was served with Boeing737 nonstop flights from both Charlotte and Dayton on November 1, 1984.

No cachet was provided for the inaugural mail.

This cover was one of only 38 pieces pieces of mail carried on the inaugural Piedmont Airlines flight from the Charlotte, North Carolina Airport Mail Facility to San Francisco, California (where it was backstamped) and is listed in The American Air Mail Catalogue as PI-D87Wf.

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.