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St. Louis Downtown Airport (CPS/KCPS) is a public reliever airport in Cahokia, Illinois, just across the Mississippi River from downtown St. Louis. It primarily serves general and business aviation, with flight training, corporate charters, and maintenance operations, and offers convenient access to the Gateway Arch and central St. Louis. The airport has a control tower and multiple runways, making it a busy general aviation hub in the metro area.
💡 Local Tip
Frequent visitors know that CPS is often less congested than Lambert for business flights, but call ahead for hangar space during major events like Cardinals games or downtown festivals.
🚖 Getting There
By car, take I-55/I-64 or I-70 across the Mississippi River to the Illinois side and follow signs to the airport; rideshare and taxi service are available but may require a short wait. Public transit options are limited, so renting a car or arranging a hotel shuttle is often easiest. Allow extra time for rush-hour traffic on the Poplar Street Bridge or I-55/70 approaches.
❓ Frequently Asked Questions
Q: What is the airport code for St. Louis Downtown Airport?
A: The IATA code is CPS and the ICAO code is KCPS.
Q: Is St. Louis Downtown Airport the same as St. Louis Lambert International Airport?
A: No. CPS is a smaller general aviation reliever airport in Cahokia, Illinois, while STL is the major commercial airport in St. Louis, Missouri.
Q: What services are available at CPS?
A: Expect FBO services, fuel, hangar and tie-down parking, flight instruction, aircraft maintenance, and charter operations; commercial airline service is not available.
Q: How far is St. Louis Downtown Airport from downtown St. Louis?
A: It is roughly 3 to 5 miles southeast of downtown St. Louis, typically a 10- to 15-minute drive depending on traffic and bridge crossings.
AI-generated content · Generated Oct 1, 2026 · deepseek-v4.1-flash