Shanghai Hongqiao International Airport (IATA: SHA, ICAO: ZSSS) is one of two international airports of Shanghai, the largest city by population in China, and a significant airline hub of the country. Hongqiao Airport mainly serves domestic and regional flights, although the airport also serves select international flights (mainly to Seoul–Gimpo, Taipei–Songshan and Tokyo–Haneda). The airport is located near the town of Hongqiao in the outskirts of Changning and Minhang districts, 13 kilometres (8.1 mi) west of downtown, and is closer to the city center than the area’s primary international airport, Shanghai–Pudong.