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

IAH Airport Page →
663 mi airlines 1/wk
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Flight Schedule 1 flight Verified 1h ago
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  Flight Airline AC Dep Arr Dur OTP Sched  
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UA3751
UA United
7M9
1:10 PM
CDT TC
3:15 PM
CDT
2h 5m
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M T W T F S S
Prices

No flights match your filters.

No nonstop flights on this route. connecting options below.

✦ 1-STOP More options, longer trips
✧ 2-STOP Loading... Reach the hardest destinations
Houston to Cahokia/St Louis
1 carrier, 1 flights/week nonstop.
1 Airlines 1 Flights/wk 663 mi 2h 5m nonstop 23 1-stop hubs

IAH–CPS is served by 1 airline with nonstop service. United Airlines leads the route. The flight covers 663 miles in approximately 2h 5m. Beyond nonstop, 23 hubs offer 1-stop connections.

Also explore IAH Routes CPS Routes IAH Live Flights CPS Live Flights IAH Delays
Carriers on this route

Airline Landscape

All carriers operating nonstop IAH–CPS service, compared side by side.
Airline Freq/wk Aircraft Duration Dep OTP Alliance Codeshares
UA United Airlines 1 7M9 2h05 12% Star Alliance –
Aircraft on this route
7M9 Boeing 737 MAX 9 – UA
Alliance coverage
Star Alliance: UA (1 flights/wk, 100%)
OTP based on airport-level delay snapshots. Duration ranges reflect seasonal/directional variation.
Schedule

Weekly Schedule Pattern

Nonstop flight frequency by day of week, IAH to CPS direction.
Mon
0
flights
Tue
0
flights
Wed
0
flights
Thu
0
flights
Fri
0
flights
Sat
0
flights
Sun
1
flight
Departure time distribution
12 AM6 AM12 PM6 PM12 AM
Morning departures
Afternoon/evening departures
1
Nonstop flights
1
Outbound / wk
0
Return / wk
Connections

Connection Landscape

Beyond nonstop. 1-stop and 2-stop options for IAH to CPS.
1-STOP
One-Stop Connections
23
Hubs
~4h
Fastest
~27h
Longest
Verified with published schedule alignment and minimum connection time.
2-STOP
Two-Stop Connections
77
Candidates
Two-stop connections loaded in the connections tab above.
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.
Alternatives

Other ways to reach Cahokia/St Louis from Houston

Nearby airports with service to St Louis Downtown Airport.
Metric IAH→CPS AUS→CPS
Distance from IAH – 140 mi
Nonstop airlines 1 1
Weekly flights 1 1
Flight time 2h 5m 2h 1m
Departure OTP 12% –
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.
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
Weekly flights1 out
1-stop connections23 hubs
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 approximately 2h 5m. The route covers 663 miles.
1 airline operates nonstop service: United Airlines.
There are approximately 1 nonstop flights per week from IAH to CPS.
Yes, 1-stop connections are available through CLT, PIT, RSW, MDW, FLL, SAV, IAD, PBI, BNA, CLE, PHL, LAS, LGA, BOS, MIA, PHX, JFK, LAX, SJC, SEA, AUS, DAL and DFW. These options provide additional schedule flexibility.
Nearby alternatives include 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) are connected by nonstop service from United Airlines. With 1 weekly departures, this is a regularly served route.

IAH to CPS Flight Duration and Schedule

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

Connecting Options and Alternatives

23 one-stop connections are available, with the fastest taking approximately 4 hours via CLT. Two-stop connections are also available via intermediate hubs. Nearby alternative airports include Austin (AUS).