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YSM to ONT: distance & flight time
Fort Smith (Fort Smith Airport) → Ontario (Ontario International Airport)
1,812 mi
2,916 km · 1,575 nm
4h 1m
estimated nonstop flight time
-1h
time difference · heading south
See live YSM→ONT fares Phone-only fares on this route — call free
Flight time details
1,812 miles nonstop takes roughly 4h 1m gate to gate, flying south. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 1-hour time set-back when reading arrival times on your ticket.
The two airports
- YSM — Fort Smith Airport · Fort Smith, Canada
- 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 YSM
- YPY · Fort Chipewyan Airport92 mi away
- YFR · Fort Resolution Airport99 mi away
- YBE · Uranium City Airport125 mi away
- YHY · Hay River / Merlyn Carter Airport142 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 YSM from ONT?
The flight distance from Fort Smith (YSM) to Ontario (ONT) is 1,812 miles (2,916 km, 1,575 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from YSM to ONT?
A nonstop flight takes about 4h 1m 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 Fort Smith and Ontario?
Ontario is 1 hour behind Fort Smith.
What is the cheapest way to fly from YSM to ONT?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on YSM–ONT that never appear on search engines, with no booking fees.