Flights Ontario → Houston
ONT → IAH
Route overview
The flight route from Ontario to Houston operates with a high on-time performance rate of 90%, with an average delay of just 5.6 minutes per flight. Over the course of a year, this route sees 115 flights using Canadair Regional Jet 700 aircraft, serving a destination airport that handles nearly 40,979,422 passengers annually.
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 Ontario (ONT) → Houston (IAH) route is operated by United Airlines. Across 115 flights monitored in recent months, 90% arrived on time (within 15 min of schedule), with an average delay of 6 minutes. The cancellation rate is 1.74%. FlightGuard's average computed risk is 15.4/100 (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 Ontario the average ATFM delay is 2.0 minutes.
Heading to Houston: what to expect in this direction
Flying from Ontario (ONT) to Houston (IAH) heads east for about 2,142 km, a flight time of roughly 3h 6m.
Departures from Ontario on this leg cluster in the overnight window: about 85% of ONT-IAH flights take off then.
Air-traffic congestion: departing Ontario the average ATFM delay is 2.0 min (airspace/NAS (BTS)); arriving into Houston it is 2.0 min (atfm).
Across 115 tracked ONT-IAH flights, 90% left on time with an average delay of 6 min and a 1.7% 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 ONT-IAH
Airports
Frequently asked questions about ONT-IAH
On the Ontario (ONT) -> Houston (IAH) route, on-time performance is 90% with an average delay of 6 minutes, based on 115 tracked flights.
The cancellation rate on Ontario-Houston is 1.74% across 115 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.
