St Louis to Houston (STL–IAH) — Airlines, Schedules & Connections
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No nonstop flights on this route. connecting options below.
STL–IAH is served by 1 airline with nonstop service. United Airlines leads the route. The flight covers 668 miles in approximately 2h 15m. Beyond nonstop, 118 hubs offer 1-stop connections.
Airline Landscape
| Airline | Freq/wk | Aircraft | Duration | Dep OTP | Alliance | Codeshares |
|---|---|---|---|---|---|---|
| UA United Airlines Also: CM, NH, NZ, VA | 42 | 73G, E7W | 2h15-2h24 | Star Alliance | CM, NH, NZ, VA |
Weekly Schedule Pattern
Connection Landscape
Other ways to reach Houston from St Louis
| Metric | STL→IAH | PIA→IAH |
|---|---|---|
| Distance from STL | – | 137 mi |
| Nonstop airlines | 1 | 1 |
| Weekly flights | 102 | – |
| Flight time | 2h 15m | 1h 50m |
| Departure OTP | 79% | – |
Travel Essentials
STL: CDT · IAH: CDT
When it's 6:00 PM in St Louis, it's 6:00 PM in Houston.
No direct rail from IAH. The METRO bus 102 (IAH Express) runs to downtown Houston's transit center (60–90 min, $1.25). Taxis to downtown Houston cost $50–70. Ride-hails pick up at the designated Rideshare zones outside baggage claim on the lower level.IAH has five terminals (A–E) connected by an underground tunnel with trams. Terminal D handles international arrivals. Rental car agencies are in a consolidated facility adjacent to Terminal C; a free IAH Connector bus runs between terminals and the rental car center. The Galleria / Uptown area costs $35–50 by ride-hail.
Humid subtropical climate. Hot, humid, and wet for much of the year. Summers are brutal (33–38°C) with high humidity and near-daily afternoon thunderstorms. Severe storms with hail and high winds regularly cause ground stops from April through September. Houston's flooding risk is significant. Heavy rain events, including tropical system remnants, have flooded airport roads, cutting off surface access even when the airport itself remains operational.
Winters are mild (5–18°C) with occasional ice storms. These are rare but highly disruptive when they occur. Hurricane season (June–November) requires monitoring for Gulf storms. October through March has the best flying weather.
STL–IAH Quick Facts
Frequently Asked Questions
Flights from STL to IAH
St. Louis Lambert International Airport (STL) and George Bush Intercontinental Airport (IAH) are connected by nonstop service from United Airlines. With 102 weekly departures, this is a heavily served route.
STL to IAH Flight Duration and Schedule
Nonstop flight time from STL to IAH ranges from 2 hours 15 minutes to 2 hours 24 minutes. The route covers a distance of 668 miles (1,076 km). There are approximately 102 weekly flights outbound and 102 return, totaling 204 flights per week in both directions.
Connecting Options and Alternatives
118 one-stop connections are available, with the fastest taking approximately 3 hours via SUS. Two-stop connections are also available via intermediate hubs. Nearby alternative airports include Peoria (PIA).