Cahokia is a city in Saint Louis Metro East, Illinois. Understand Get in St. Louis Downtown Airport (IATA: CPS), 38.570833°, -90.156111°. General aviation Get around See Old Cahokia Courthouse (Cahokia Courthouse State Historic Site), 38.57100°, -90.19207°. Greater Saint Louis Air & Space Museum, 38.5772°, -90.1653°. 2018-12-25 Do Buy Eat Drink Sleep Comfort Inn & Suites, 1607 Pontiac Dr., 38.5559°, -90.1645°, +1 618-332-2000. 2018-12-25 Connect Go next