Fresno Yosemite International Airport (IATA: FAT, ICAO: KFAT, FAA LID: FAT) is a joint military/public airport in Fresno, California, United States. It is the primary commercial airport for the San Joaquin Valley and three national parks: Yosemite, Sequoia and Kings Canyon. It offers scheduled passenger flights to several major airline hubs in the United States and international service to Mexico. The facility opened in June 1942 as Hammer Field, a military airfield. The airport is owned and operated by the city of Fresno and operates two runways on a property spanning 1,728 acres (699 ha). Its airport code 'FAT' stands for Fresno Air Terminal, a former name for the airport.
Due to its central location within the state, the airport is home to several military, law enforcement, firefighting, and medical air units. The Fresno Air National Guard Base on the southeast corner of the airport is home to the 144th Fighter Wing of the California Air National Guard. The Fresno Air Attack Base on the eastern side of the airport supports aerial firefighting aircraft. Other government and military operators with facilities at the airport include the California Army National Guard, the California Highway Patrol, the Fresno County Sheriff's Office, and the Fresno Police Department.