Definition of Allegheny county airport

Allegheny County Airport is located in West Mifflin, Pennsylvania, four miles (6 km) southeast of the city of Pittsburgh. The airport is owned by the Allegheny County Airport Authority and serves as the primary FAA designated reliever airport for Pittsburgh International Airport. It was historically the main entrance to metro Pittsburgh via air from its inception up until the early 1950s when Pittsburgh International opened. Like many other historic "municipal" fields throughout the country, Allegheny serves small and mid-sized private, corporate and commercial traffic well, but was not built to handle the constant traffic of international jet service that arrived in the 1950s and 1960's.