John Murtha Johnstown–Cambria County Airport (ICAO: KJST, IATA: JST) is a regional airport located north east of Johnstown Pennsylvania United States. The airport service airlines like United and service the millitary like the Nation Guard. Johnstown County Airport has two runways being runway 33-15, and 23-5. United Express regularly flies routes to Washington Dulles & Chicago O-Hare in their CRJ.