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ISN to GTF: distance & flight time
Williston (Sloulin Field International Airport) → Great Falls (Great Falls International Airport)
362 mi
582 km · 314 nm
1h 25m
estimated nonstop flight time
-1h
time difference · heading west
See live ISN→GTF fares Phone-only fares on this route — call free
Flight time details
362 miles nonstop takes roughly 1h 25m gate to gate, flying west. 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
- ISN — Sloulin Field International Airport · Williston, 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 ISN
- SDY · Sidney - Richland Regional Airport41 mi away
- YEN · Estevan Airport78 mi away
- OLF · L M Clayton Airport89 mi away
- GDV · Dawson Community Airport90 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 ISN from GTF?
The flight distance from Williston (ISN) to Great Falls (GTF) is 362 miles (582 km, 314 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from ISN to GTF?
A nonstop flight takes about 1h 25m 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 Williston and Great Falls?
Great Falls is 1 hour behind Williston.
What is the cheapest way to fly from ISN to GTF?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on ISN–GTF that never appear on search engines, with no booking fees.