Chengdu Shuangliu International Airport (IATA: CTU, ICAO: ZUUU) is the major international airport serving Chengdu, the capital of Sichuan province, China. Located about 16 kilometres (10 mi) southwest of downtown Chengdu to the north of Shuangliu District, Shuangliu airport is an important aviation hub for Western China. Shuangliu Airport is one of the two core hubs for Air China, together with Beijing, as well as the main hub and headquarters for Sichuan Airlines and Chengdu Airlines. China Eastern Airlines, China Southern Airlines, Shenzhen Airlines, Lucky Air and Tibet Airlines also have bases at Shuangliu Airport. Chengdu airport is also a 144-hour transit visa-free airport for foreigners from many countries