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YSM to ISN: distance & flight time
Fort Smith (Fort Smith Airport) → Williston (Sloulin Field International Airport)
883 mi
1,422 km · 768 nm
2h 23m
estimated nonstop flight time
+1h
time difference · heading southeast
See live YSM→ISN fares Phone-only fares on this route — call free
Flight time details
883 miles nonstop takes roughly 2h 23m gate to gate, flying southeast. 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
- YSM — Fort Smith Airport · Fort Smith, Canada
- ISN — Sloulin Field International Airport · Williston, 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 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
Frequently asked questions
How far is YSM from ISN?
The flight distance from Fort Smith (YSM) to Williston (ISN) is 883 miles (1,422 km, 768 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from YSM to ISN?
A nonstop flight takes about 2h 23m 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 Williston?
Williston is 1 hour ahead of Fort Smith.
What is the cheapest way to fly from YSM to ISN?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on YSM–ISN that never appear on search engines, with no booking fees.