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ONT to GTF: distance & flight time
Ontario (Ontario International Airport) → Great Falls (Great Falls International Airport)
982 mi
1,581 km · 854 nm
2h 36m
estimated nonstop flight time
+1h
time difference · heading north
See live ONT→GTF fares Phone-only fares on this route — call free
Flight time details
982 miles nonstop takes roughly 2h 36m gate to gate, flying north. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 1-hour time gain when reading arrival times on your ticket.
The two airports
- ONT — Ontario International Airport · Ontario, United States
- GTF — Great Falls International Airport · Great Falls, 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 ONT
- CCB · Cable Airport6 mi away
- CNO · Chino Airport6 mi away
- LAX · Los Angeles International Airport47 mi away
- RAL · Riverside Municipal Airport11 mi away
Near GTF
- HLN · Helena Regional Airport67 mi away
- CTB · Cut Bank International Airport91 mi away
- LWT · Lewistown Municipal Airport94 mi away
- HVR · Havre City County Airport104 mi away
Frequently asked questions
How far is ONT from GTF?
The flight distance from Ontario (ONT) to Great Falls (GTF) is 982 miles (1,581 km, 854 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from ONT to GTF?
A nonstop flight takes about 2h 36m 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 Ontario and Great Falls?
Great Falls is 1 hour ahead of Ontario.
What is the cheapest way to fly from ONT to GTF?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on ONT–GTF that never appear on search engines, with no booking fees.