High Quality Content by WIKIPEDIA articles! Philadelphia International Airport (IATA: PHL, ICAO: KPHL, FAA LID: PHL) is an airport in Philadelphia, Pennsylvania, and is the largest airport in the Delaware Valley region and in Pennsylvania. As of 2008 it is the 11th busiest airport in the world in terms of aircraft activity. The airport is the primary international hub of US Airways and has service to destinations in the United States, Canada, the Caribbean, Costa Rica, Europe, Israel, and Mexico. Most of the airport property is located in Philadelphia proper. The international terminal and the western end of the airfield are located in Tinicum Township, Delaware County.