Ontario to Houston (ONT–IAH) — Airlines, Schedules & Connections
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.
Most recently operated nonstop flights — the month shown is when each was last scheduled. Most destinations remain reachable with a connection.
No discontinued nonstop flights on record for this route.
ONT–IAH is served by 2 airlines with nonstop service. United Airlines and Frontier lead the route. The flight covers 1,331 miles in approximately 3h 19m. Beyond nonstop, 1-stop connecting options are also available.
Airline Landscape
| Airline | Freq/wk | Aircraft | Duration | Dep OTP | Alliance | Codeshares |
|---|---|---|---|---|---|---|
| UA United Airlines | 8 | 739 | 3h15-3h19 | Star Alliance | – | |
| F9 Frontier Also: Y4 | 7 | A21N | 3h20 | – | Y4 |
Weekly Schedule Pattern
Connection Landscape
On-Time Performance
Other ways to reach Houston from Ontario
| Metric | ONT→IAH | SBD→IAH | SNA→IAH |
|---|---|---|---|
| Distance from ONT | – | 21 mi | 30 mi |
| Nonstop airlines | 2 | 3 | 3 |
| Weekly flights | 24 | 2 | 29 |
| Flight time | 3h 19m | 2h 58m | 3h 6m |
| Departure OTP | 63% | – | – |
Travel Essentials
ONT: PDT · IAH: CDT
When it's 6:00 PM in Ontario, it's 8:00 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.
ONT–IAH Quick Facts
Frequently Asked Questions
Flights from ONT to IAH
Ontario International Airport (ONT) and George Bush Intercontinental Airport (IAH) are connected by nonstop service from United Airlines and Frontier. With 24 weekly departures, this is a well served route.
ONT to IAH Flight Duration and Schedule
Nonstop flight time from ONT to IAH is about 3 hours 19 minutes gate to gate. The route covers a distance of 1,331 miles (2,142 km). There are approximately 24 weekly flights outbound and 22 return, totaling 46 flights per week in both directions.
Connecting Options and Alternatives
1-stop connecting options are also available, commonly via Austin Bergstrom, Phoenix Sky Harbor and Harry Reid. Two-stop connections are also available via intermediate hubs. Nearby alternative airports include San Bernardino (SBD), Santa Ana (SNA) and Long Beach (LGB).