St. Louis Airport may refer to:
- One of six airports in the Greater St. Louis Area
- St. Louis Lambert International Airport in St. Louis County, Missouri, United States (FAA/IATA: STL)
- MidAmerica St. Louis Airport in Belleville, Illinois, United States (FAA/IATA: BLV)
- St. Louis Downtown Airport in Cahokia, Illinois, United States (FAA/IATA: CPS)
- St. Louis Regional Airport in Alton, Illinois, United States (FAA/IATA: ALN)
- Spirit of St. Louis Airport in Chesterfield, Missouri, United States (FAA/IATA: SUS)
- St. Louis Metro-East Airport, also known as Shafer Field, in St. Jacob, Illinois, United States (FAA: IL48)