Philadelphia International Airport (PHL) is an airport in Philadelphia, Pennsylvania, and is the largest airport in the Delaware Valley region. It is at present the 10th 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, and Mexico, and possibly in the future to China, as US Airways may begin service to Beijing in 2009.
Most of the airport property is located in Philadelphia city limits. The international terminal and the western end of the airfield are located in Tinicum Township, Delaware County.