Xi'an Xiguan Airport (simplified Chinese: 西安西关机场; traditional Chinese: 西安西關機場; pinyin: Xī'ān Xīguān Jīchǎng) (IATA: SIA, ICAO: ZLSN) was an airport in Xi'an, Shaanxi, People's Republic of China. It served Xi'an before Xi'an Xianyang International Airport opened.[1][2]