Ontario International Airport
Ontario, United StatesONT / KONT
Major airport · 63 direct destinations · 2 runways · longest runway 12,198 ft
84 °F · ClearSource: METAR observation via the NOAA Aviation Weather Center
Route
Ontario → Houston
ONT
OntarioOntario International Airport
OntarioOntario International AirportIAHHoustonGeorge Bush Intercontinental Airport
HoustonGeorge Bush Intercontinental Airport- Distance
- 1,331 mi
- Estimated flight time
- ~3h 10m
Houston is currently 2 hours ahead of Ontario.
Observed nonstop
How often does this route fly?
Frequency
A couple of times a day
On average around 2 flights a day, observed from October 2025 to September 2026.
- 2
- flights per day
- 3
- busiest month · May
- 2
- quietest month · Oct
- 2 hr 41 min
- measured flight time
- 12 / 12
- months seen
Through the year
Per day, month by month
- 2Jan2026
- 2Feb
- 2Mar
- 2Apr
- 3May
- 3Jun
- 3Jul
- 3Aug
- 2Sep
- 2Oct2025
- 2Nov
- 2Dec
Airlines
Who flies it
United Airlinesall year
Air Transport Internationalall year
Frontier Airlinesall year
UPS Airlinesall year
American Airlinesnow and then
Through the day
Departure times
Local time in Ontario. Most departures between 04:00 and 07:00.
- 00:00
- 01:00
- 02:00
- 03:00
- 04:00
- 05:00
- 06:00
- 07:00
- 08:00
- 09:00
- 10:00
- 11:00
- 12:00
- 13:00
- 14:00
- 15:00
- 16:00
- 17:00
- 18:00
- 19:00
- 20:00
- 21:00
- 22:00
- 23:00
Through the week
By weekday
- 2.1Mon
- 2.1Tue
- 1.9Wed
- 2Thu
- 3.4Fri
- 2Sat
- 2.1Sun
Fleet
Aircraft observed
- Boeing 767-300B76333%
- Boeing 737-900B73933%
- Airbus A321neoA21N12%
- Airbus A320neoA20N6%
- Airbus A321A3216%
All the numbers in a table
| Month | Per day | Seen | Airlines |
|---|---|---|---|
| January 2026 | 2 | 50 |
|
| February 2026 | 2 | 60 |
|
| March 2026 | 2 | 66 |
|
| April 2026 | 2 | 64 |
|
| May 2026 | 3 | 87 |
|
| June 2026 | 3 | 89 |
|
| July 2026 | 3 | 96 |
|
| August 2026 | 3 | 78 |
|
| September 2026 | 2 | 63 |
|
| October 2025 | 2 | 54 |
|
| November 2025 | 2 | 44 |
|
| December 2025 | 2 | 52 |
|
Airlines observed on this route
From observed callsign routes on ONT-IAH - not a booking guarantee.
About this route
- Domestic route: both airports are in the same country.
- The opposite direction has also been observed as a direct connection.
- Direct destinations observed from Ontario: 63.
- Direct destinations observed from Houston: 159.
The airports on this route
George Bush Intercontinental Airport
Houston, United StatesIAH / KIAH
International hub · 159 direct destinations · 5 runways · longest runway 12,001 ft
74 °F · CloudySource: METAR observation via the NOAA Aviation Weather Center
Alternative airports for this journey
Same journey, a different airport nearby - with an observed direct connection.
SBD IAHSan Bernardino International AirportSan Bernardino is about 21 mi from Ontario.View route →ONT HOUWilliam P. Hobby AirportHouston is about 24 mi from Houston.View route →SNA IAHJohn Wayne Orange County International AirportSanta Ana is about 30 mi from Ontario.View route →LGB IAHLong Beach International AirportLong Beach is about 35 mi from Ontario.View route →
About the route from Ontario to Houston
The observed direct connection between Ontario International Airport (ONT) and George Bush Intercontinental Airport (IAH) covers approximately 1,331 mi. The estimated flight time is around 3h 10m. Air Transport International, American Airlines, Frontier Airlines, United Airlines and UPS Airlines have been observed on this connection in the available route data.
Frequently asked questions about this route
- How far is Ontario from Houston by air?
- The great-circle distance between Ontario International Airport and George Bush Intercontinental Airport is approximately 1,331 mi.
- How long is the flight from Ontario to Houston?
- Based on the distance, the estimated flight time is about 3h 10m. This is an estimate, not a schedule.
- Is there a direct connection from Ontario to Houston?
- Yes, a direct connection between ONT and IAH has been observed in our route data.
- Which airlines have been observed on this route?
- In the available route data: Air Transport International, American Airlines, Frontier Airlines, United Airlines and UPS Airlines.
- How often is there a flight from Ontario to Houston?
- On average around 2 flights a day, measured over twelve months (October 2025 to September 2026) in the flight archive, with 803 observed flights. Mainly United Airlines, Air Transport International, Frontier Airlines. That is an observation, not a timetable.
- What is the current time difference between Ontario and Houston?
- Houston is currently 2 hours ahead of Ontario.
Where this data comes from
The route data comes from the flight archive (ADS-B, adsb.lol): which connections actually flew over the last twelve full months and who flew them, combined with our own airport, runway, and airline datasets. It is reference data about observed routes - not a current timetable and no claim about bookability.
The frequency and aircraft on this page come from the flight archive (ADS-B, 12 months, October 2025 to September 2026), summarized per route per month. We do not see every flight, so it is a floor, not a count.
Route data updated on October 11, 2026.