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IAH to ONT: distance & flight time
Houston (George Bush Intercontinental Houston Airport) → Ontario (Ontario International Airport)
1,331 mi
2,142 km · 1,157 nm
3h 22m
estimated nonstop flight time
-2h
time difference · heading west
See live IAH→ONT fares Phone-only fares on this route — call free
Flight time details
1,331 miles nonstop takes roughly 3h 22m gate to gate, flying west. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 2-hour time set-back when reading arrival times on your ticket.
The two airports
- IAH — George Bush Intercontinental Houston Airport · Houston, United States
- ONT — Ontario International Airport · Ontario, United States
Distances are great-circle ("as the crow flies") — the same basis airlines use for frequent-flyer miles.
Alternate airports can cut this fare
Flying from or into a nearby airport is the #1 trick our agents use to beat online prices. Call and we'll compare every combination on one call.
Near IAH
- DWH · David Wayne Hooks Memorial Airport14 mi away
- IWS · West Houston Airport23 mi away
- AAP · Andrau Airpark23 mi away
- HOU · William P Hobby Airport24 mi away
Near ONT
- CCB · Cable Airport6 mi away
- CNO · Chino Airport6 mi away
- LAX · Los Angeles International Airport47 mi away
- RAL · Riverside Municipal Airport11 mi away
Frequently asked questions
How far is IAH from ONT?
The flight distance from Houston (IAH) to Ontario (ONT) is 1,331 miles (2,142 km, 1,157 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from IAH to ONT?
A nonstop flight takes about 3h 22m gate to gate. Actual time varies with winds, routing and season — eastbound transatlantic flights, for example, are usually faster than the return.
What is the time difference between Houston and Ontario?
Ontario is 2 hours behind Houston.
What is the cheapest way to fly from IAH to ONT?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on IAH–ONT that never appear on search engines, with no booking fees.