New Chitose Airport (IATA: CTS, ICAO: RJCC) is an international airport located 2.7 NM (5.0 km; 3.1 mi) south-southeast of Chitose and Tomakomai, Hokkaidō, Japan, serving the Sapporo metropolitan area. By both traffic and land area, it is the largest airport in Hokkaidō. It is adjacent to Chitose Air Base, a Japan Air Self-Defense Force base which houses F-15 Eagle fighter jets, the Japanese Air Force One government aircraft, and a number of smaller emergency response aircraft and helicopters. Chitose and New Chitose have separate runways but are interconnected by taxiways, and aircraft at either facility can enter the other by ground if permitted; the runways at Chitose are occasionally used to relieve runway closures at New Chitose due to winter weather. JASDF provides air traffic control for both facilities. As of 2018, New Chitose Airport was the fifth-busiest airport in Japan, and ranked 64th in the world in terms of passengers carried.The 819 km (509 mi) Sapporo–Tokyo Haneda route is the second busiest air route in the world, with 9.7 million passengers carried in 2018.