Phoenix Sky Harbor International Airport (IATA: PHX, ICAO: KPHX) is a public airport located three miles (4.8 km) east of the central business district of Phoenix, a city in Maricopa County, Arizona, USA. It is Arizona's main international airport and one of the largest aviation facilities in the American Southwest.

Sky Harbor has been operating under its unique name since prior to 1935, when it was purchased by the City of Phoenix. In the 1950s it was serviced by four airline companies. Today, it serves as a hub for US Airways, and Dallas-based Southwest Airlines has a large, hub-like focus city operation.

In 2008, the airport served 39,891,193 passengers, making it the ninth busiest in the United States, and seventeenth busiest airport in the world, in terms of passengers.