Spirit of St. Louis Airport (IATA: SUS, ICAO: KSUS, FAA LID: SUS) is a public airport located 17 miles (27 km) west of the central business district of St. Louis, in St. Louis County, Missouri, in the city of Chesterfield, United States.

[1] For the 12-month period ending December 31, 2022, the airport had 143,570 aircraft operations, an average of 393 per day: 88% general aviation, 10% air taxi, <1% military and <1% commercial.

At that time, there were 295 aircraft based at this airport: 180 single-engine, 37 multi-engine, 69 jet, 7 helicopter, 1 glider and 1 ultra-light.

[1] In 2007, the airport finished a multimillion-dollar expansion project to add a parallel taxiway to the north of 8L/26R.

The Spirit of St. Louis Air Show returned to the airport, May 3–4, 2014, after being absent since 2007.