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IAG to ONT: distance & flight time
Niagara Falls (Niagara Falls International Airport) → Ontario (Ontario International Airport)
2,158 mi
3,473 km · 1,875 nm
4h 42m
estimated nonstop flight time
-3h
time difference · heading west
See live IAG→ONT fares Phone-only fares on this route — call free
Flight time details
2,158 miles nonstop takes roughly 4h 42m gate to gate, flying west. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 3-hour time set-back when reading arrival times on your ticket.
The two airports
- IAG — Niagara Falls International Airport · Niagara Falls, 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 IAG
- YYZ · Lester B. Pearson International Airport52 mi away
- YCM · Niagara District Airport13 mi away
- BUF · Buffalo Niagara International Airport16 mi away
- DU9 · Dunnville Airport37 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 IAG from ONT?
The flight distance from Niagara Falls (IAG) to Ontario (ONT) is 2,158 miles (3,473 km, 1,875 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from IAG to ONT?
A nonstop flight takes about 4h 42m 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 Niagara Falls and Ontario?
Ontario is 3 hours behind Niagara Falls.
What is the cheapest way to fly from IAG to ONT?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on IAG–ONT that never appear on search engines, with no booking fees.