In an award in the Service to Tri-Cities Case, a new Air Mail Route 97 segment was added on August 1, 1977 from Pittsburgh to Bristol, Tennessee / Virginia, Kingsport and Johnson City, Tennessee, which were served by the same airport. 

This cover was carried on the inaugural Air Mail Route 97 flight from the Pittsburgh, Pennsylvania Airport Mail Facility to Johnson City, Tennessee (where it was backstamped) and is listed in the Contract Air Mail Flights (CAM) section of The American Air Mail Catalogue as 97S114f.

A Civil Aeronautics Board order, effective June 11, 1979, authorized the corporate title “Allegheny Airlines” to be changed to “USAir, Inc.” The name change reflected the carrier’s geographic expansion and increased airline status.

In early 1997 USAir changed its name to US Airways and introduced a new corporate identity. 

On February 14, 2013, US Airways Group and AMR Corporation announced that the two companies would merge to form the world's largest airline. The combined airline carries the American Airlines name.