Tucson International Airport (IATA: TUS, ICAO: KTUS, FAA LID: TUS) is a civil-military airport owned by the City of Tucson 8 miles (7.0 nmi; 13 km) south of downtown Tucson, in Pima County, Arizona, United States. It is the second busiest airport in Arizona, after Phoenix Sky Harbor International Airport.

The National Plan of Integrated Airport Systems for 2011–2015 categorized it as a primary commercial service airport since it has over 10,000 passenger boardings per year. Federal Aviation Administration records say the airport had 1,779,679 enplanements in 2011, a decrease from 1,844,228 in 2010.

Tucson International is operated on a long-term lease by the Tucson Airport Authority, which also operates Ryan Airfield, a general aviation airport. Public transportation to the airport is Sun Tran bus routes No. 11 and No. 25.