Houston to Cahokia/St Louis (IAH–CPS) — Airlines, Schedules & Connections

IAH Airport Page →
663 mi airlines charter/private 1/wk
On-time Some delays Frequent delays
Connecting Flight Schedule 15 1-stop flights Verified 4w ago
Nonstop Charter / private 1-Stop 2-Stop Hide separate tickets Hide overnight Hide codeshares
  Flight Airline AC Dep Arr Dur OTP Sched  
✈ Nonstop

No flights match your filters.

No scheduled airline flights on this route — it's flown by charter / private operators (). No nonstop flights on this route. connecting options below.

✦ 1-Stop connections via 10 hubs
MSP Minneapolis 4h 50m AFAMDL → DL Minneapolis (MSP) to Cahokia/St Louis flights
HOU Houston ~3h 57m → Houston (HOU) to Cahokia/St Louis flights
AUS Austin ~4h 38m ACCMEK → Austin (AUS) to Cahokia/St Louis flights
PIT Pittsburgh ~4h 50m EKNZUA → Pittsburgh (PIT) to Cahokia/St Louis flights
FLL Fort Lauderdale ~5h 31m ADAVF9 → Fort Lauderdale (FLL) to Cahokia/St Louis flights
LGA New York ~6h 32m AMDLKQ → New York (LGA) to Cahokia/St Louis flights
DEN Denver ~6h 33m ACAVEK → SY Denver (DEN) to Cahokia/St Louis flights
IAD Dulles ~6h 46m AVAZCA → SY Dulles (IAD) to Cahokia/St Louis flights
PHX Phoenix ~6h 58m AAEKF9 → Phoenix (PHX) to Cahokia/St Louis flights
JFK New York ~7h 21m ATB6DL → New York (JFK) to Cahokia/St Louis flights
✦ 1-STOP More options, longer trips
✧ 2-STOP Loading... Reach the hardest destinations
Houston to Cahokia/St Louis
Connecting service available through multiple hubs.
1 Airlines 663 mi 2h 5m nonstop

IAH–CPS had nonstop service from United Airlines, last on the schedule in May 2026. There's no nonstop on it right now, so today you'd fly it with one stop. The connecting options below are sorted by layover. Nonstop, it's about 663 miles in 2h 5m.

Also explore IAH Routes CPS Routes IAH Live Flights CPS Live Flights IAH Delays
All flights from Cahokia/St Louis (CPS) Cahokia/St Louis to Houston flights
Carriers on this route

Airline Landscape

Carriers that operated nonstop IAH–CPS service, compared side by side.
Airline Freq/wk Aircraft Duration Dep OTP Alliance Codeshares
UA United Airlines 1 – – 57% Star Alliance –
Alliance coverage
Star Alliance: UA (1 flights/wk, 100%)
OTP based on airport-level delay snapshots. Duration ranges reflect seasonal/directional variation.
Connections

Connection Landscape

1-stop and 2-stop options for IAH to CPS.
1-STOP
One-Stop Connections
15
Hubs
~3h
Fastest
~27h
Longest
HOU ~3h 57m AUS ~4h 38m PIT ~4h 50m MSP ~4h 50m FLL ~5h 31m
Verified with published schedule alignment and minimum connection time.
Connections computed from published schedules with minimum connection time verification. Use the interactive explorer above the fold to filter by airline, tier, and layover time.
Reliability

On-Time Performance

What to expect at each end of your journey.
Outbound
IAH → CPS
57%
Frequent delays expected. Consider flexible booking.
Departing
57%
Return
CPS → IAH
90%
Generally reliable. Most flights run on time.
Arriving
90%
OTP = percentage of flights arriving within 15 min of schedule. Based on airport-level delay snapshots. IAH delays →
Alternatives

Other ways to reach Cahokia/St Louis from Houston

Nearby airports with service to St Louis Downtown Airport.
Metric IAH→CPS HOU→CPS AUS→CPS
Distance from IAH – 24 mi 140 mi
Nonstop airlines – 1 1
Weekly flights – – –
Flight time 2h 5m 1h 42m 2h 1m
Departure OTP 57% – –
Houston (HOU) to Cahokia/St Louis flights · Austin (AUS) to Cahokia/St Louis flights
Airports within 200 miles of IAH with service to St Louis Downtown Airport.
Know before you go

Travel Essentials

Practical planning for this route.
Time Difference
0h
Cahokia/St Louis is 0 hours the same as Houston.
IAH: CDT · CPS: CDT

When it's 6:00 PM in Houston, it's 6:00 PM in Cahokia/St Louis.
Distance & Flight Time
663 mi / 1,067 km
Nonstop flight time is approximately 2h 5m gate to gate.
Getting to IAH

IAH has no direct rail link to downtown Houston. The IAH Express bus runs from Houston Amtrak/Greyhound station via Park & Ride to Terminal C (60–90 min, $1.25 with METRO Q card). This is the only transit option; Houston's rail network does not reach the airport.Taxis from downtown Houston cost $50–70 and take 40–60 minutes. Ride-hails (Uber, Lyft) are typically $35–55. IAH sits 23 miles north of downtown on the North Freeway (I-45); traffic is heavy during morning and evening rush. Remote economy parking lots serve all terminals via shuttle.

Facts

IAH–CPS Quick Facts

Key statistics for the Houston to Cahokia/St Louis route.
Route details
Distance663 mi / 1,067 km
Flight time2h 5m
Time difference0 hours
Airlines (nonstop)1
1-stop connectionsAvailable
Origin: IAH
Full nameGeorge Bush Intercontinental Airport
IATA / ICAOIAH / KIAH
TimezoneAmerica/Chicago
Passengers/yr46.7M
Elevation97 ft / 30 m
Destination: CPS
Full nameSt Louis Downtown Airport
IATA / ICAOCPS / KCPS
TimezoneAmerica/Chicago
Elevation413 ft / 126 m
FAQ

Frequently Asked Questions

Common questions about IAH to CPS flights.
Nonstop flights from George Bush Intercontinental Airport to St Louis Downtown Airport take about 2h 5m gate to gate. The route covers 663 miles.
1 airline operated the nonstop from IAH to CPS: United Airlines. The last scheduled nonstop was in May 2026. There's no nonstop right now, so today you'd fly it with one stop. See the connection options above, ranked by layover.
Not right now. The last scheduled nonstop was in May 2026. You can still fly it with one stop, and the connecting options above are sorted by layover. Nonstop, the hop took about 2h 5m.
Yes, 1-stop connections are available, ranked by layover time. Common connecting points include Minneapolis–Saint Paul.
Nearby alternatives include HOU and AUS. See the Alternatives section for a full comparison.
Click the 'Search Flights' button to check availability and prices on Google Flights. You can also compare airlines and schedules on this page to find the best option.
See the On-Time Performance section for the latest delay data at both airports. This shows departure and arrival reliability to help you plan.
Route data is updated regularly from official airline schedules. On-time performance data comes from recent airport delay snapshots.

Flights from IAH to CPS

George Bush Intercontinental Airport (IAH) and St Louis Downtown Airport (CPS) had nonstop service from United Airlines, last on the schedule in May 2026. The nonstop is dormant right now, so the way to fly it today is one connection, and the options above are sorted by layover.

IAH to CPS Flight Duration and Schedule

Nonstop flight time from IAH to CPS is about 2 hours 5 minutes gate to gate. The route covers a distance of 663 miles (1,067 km).

Connecting Options and Alternatives

1-stop connecting options are also available, commonly via Minneapolis–Saint Paul. Nearby alternative airports include Houston (HOU) and Austin (AUS).