Phoenix Sky Harbor International Airport is a joint civil-military public airport located 3 miles (4.8 km) southeast of the central business district of the city of Phoenix, in Maricopa County, Arizona, United States. It is Arizona's largest and busiest airport, and the largest commercial airport in the American Southwest.

In 2009, the airport served 37,824,982 passengers, making it the ninth busiest in the United States, in terms of passengers, today the airport is recorded as the ninth busiest in the United States and one of the top 15 busiest airports in the world with a 90 million dollar daily economic impact. On a daily basis the airport handles about 1,252 aircraft that arrive and depart, along with 103,630 passengers daily, and more than 675 tons of cargo handled. Federal Aviation Administration (FAA) records show the airport had 19,816,493 commercial passenger boardings (enplanements) in calendar year 2008 and 18,853,719 enplanements in 2009. As of November 2010 there were 17,579,350 enplanements.

The airport is the primary regional hub and gateway for Mexican and Hawaiian departures for Tempe-based US Airways and is the third-largest focus city for Southwest Airlines. US Airways and Southwest are the two largest operators at the airport.