George Bush Intercontinental Airport
Houston, United StatesIAH / KIAH
International hub · 159 direct destinations · 5 runways · longest runway 12,001 ft
75 °F · Partly cloudySource: METAR observation via the NOAA Aviation Weather Center
Route
Houston → Ontario
IAH
HoustonGeorge Bush Intercontinental Airport
HoustonGeorge Bush Intercontinental AirportONTOntarioOntario International Airport
OntarioOntario International Airport- Distance
- 1,331 mi
- Estimated flight time
- ~3h 10m
Ontario is currently 2 hours behind Houston.
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 55 min
- measured flight time
- 12 / 12
- months seen
Through the year
Per day, month by month
- 2Jan2026
- 2Feb
- 2Mar
- 2Apr
- 3May
- 3Jun
- 3Jul
- 2Aug
- 2Sep
- 2Oct2025
- 2Nov
- 2Dec
Airlines
Who flies it
United Airlinesall year
Air Transport Internationalspring
Frontier Airlinesall year
UPS Airlinesautumn
Through the day
Departure times
Local time in Houston. Most departures between 05:00 and 08:00.
- 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
- 2.4Mon
- 2.1Tue
- 1.8Wed
- 2.1Thu
- 2.7Fri
- 2.2Sat
- 2.3Sun
Fleet
Aircraft observed
- Boeing 737-900B73935%
- Boeing 767-300B76330%
- Airbus A320neoA20N14%
- Airbus A321neoA21N6%
- Airbus A319A3196%
All the numbers in a table
| Month | Per day | Seen | Airlines |
|---|---|---|---|
| January 2026 | 2 | 54 |
|
| February 2026 | 2 | 64 |
|
| March 2026 | 2 | 65 |
|
| April 2026 | 2 | 64 |
|
| May 2026 | 3 | 80 |
|
| June 2026 | 3 | 83 |
|
| July 2026 | 3 | 91 |
|
| August 2026 | 2 | 74 |
|
| September 2026 | 2 | 65 |
|
| October 2025 | 2 | 54 |
|
| November 2025 | 2 | 51 |
|
| December 2025 | 2 | 55 |
|
Airlines observed on this route
From observed callsign routes on IAH-ONT - 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 Houston: 159.
- Direct destinations observed from Ontario: 63.
The airports on this route
Ontario International Airport
Ontario, United StatesONT / KONT
Major airport · 63 direct destinations · 2 runways · longest runway 12,198 ft
91 °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.
IAH SBDSan Bernardino International AirportSan Bernardino is about 21 mi from Ontario.View route →HOU ONTWilliam P. Hobby AirportHouston is about 24 mi from Houston.View route →IAH SNAJohn Wayne Orange County International AirportSanta Ana is about 30 mi from Ontario.View route →IAH HHRJack Northrop Field Hawthorne Municipal AirportHawthorne is about 43 mi from Ontario.View route →
About the route from Houston to Ontario
The observed direct connection between George Bush Intercontinental Airport (IAH) and Ontario International Airport (ONT) covers approximately 1,331 mi. The estimated flight time is around 3h 10m. Air Transport International, 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 Houston from Ontario by air?
- The great-circle distance between George Bush Intercontinental Airport and Ontario International Airport is approximately 1,331 mi.
- How long is the flight from Houston to Ontario?
- 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 Houston to Ontario?
- Yes, a direct connection between IAH and ONT has been observed in our route data.
- Which airlines have been observed on this route?
- In the available route data: Air Transport International, Frontier Airlines, United Airlines and UPS Airlines.
- How often is there a flight from Houston to Ontario?
- On average around 2 flights a day, measured over twelve months (October 2025 to September 2026) in the flight archive, with 800 observed flights. Mainly United Airlines, Air Transport International, Frontier Airlines. That is an observation, not a timetable.
- What is the current time difference between Houston and Ontario?
- Ontario is currently 2 hours behind Houston.
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.