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Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on ISN–YSM that never appear on search engines, with no booking fees.