Flights St. Louis → Houston
STL → IAH
Route overview
The flight route from St. Louis to Houston operates with an average on-time performance of 87%, with flights typically experiencing a mean delay of just 4.1 minutes. Over the course of a year, this route sees 265 total flights using Embraer RJ145 aircraft, serving one of the busiest destination airports in terms of annual passenger traffic at 40,979,422 passengers.
Your rights on this US flight (DOT)
US flights have no statutory cash compensation for delays. Under the US DOT rules, if your flight is cancelled or significantly changed and you decline rebooking, you're owed an automatic refund of the unused ticket. The tarmac-delay limit is 3 hours (domestic) / 4 hours (international). Amenities for controllable delays depend on each airline's contract of carriage.
US flight refund rules & checker →General information, not legal advice.
The St. Louis (STL) → Houston (IAH) route is operated by United Airlines. Across 357 flights monitored in recent months, 87% arrived on time (within 15 min of schedule), with an average delay of 4 minutes. The cancellation rate is 3.08%. FlightGuard's average computed risk is 24.1/100 (medium), updated in real time from weather, ATC delays, strikes, NOTAMs, fuel and flight history. At Houston the average ATFM delay is 2.0 minutes (main cause: atfm). Departing from St. Louis the average ATFM delay is 2.0 minutes.
Heading to Houston: what to expect in this direction
Flying from St. Louis (STL) to Houston (IAH) heads south-west for about 1,076 km, a flight time of roughly 1h 46m.
Departures from St. Louis on this leg cluster in the overnight window: about 58% of STL-IAH flights take off then.
Air-traffic congestion: departing St. Louis the average ATFM delay is 2.0 min (atfm); arriving into Houston it is 2.0 min (atfm).
Across 357 tracked STL-IAH flights, 87% left on time with an average delay of 4 min and a 3.1% cancellation rate.
Route facts
Flights on this route
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Airline punctuality on this route
| Airline | On-time | Average delay | Cancellations |
|---|---|---|---|
| United Airlines (UA) | 74% | 10 min | 6.9% |
Airlines operating STL-IAH
Airports
Frequently asked questions about STL-IAH
On the St. Louis (STL) -> Houston (IAH) route, on-time performance is 87% with an average delay of 4 minutes, based on 357 tracked flights.
The cancellation rate on St. Louis-Houston is 3.08% across 357 monitored flights.
The route is operated by 1 airline: United Airlines.
Enter your flight number on FlightGuard for a real-time analysis based on 9 factors: weather at Houston, ATC delays, strikes, NOTAMs, fuel, airline punctuality and recent trends.
US flights have no statutory cash compensation for delays. Under US DOT rules, if the airline cancels or significantly changes your flight and you decline rebooking, you're owed an automatic refund of the unused ticket. The tarmac-delay limit is 3 hours (domestic) / 4 hours (international). Meals or hotels for controllable delays depend on each airline's contract of carriage.
