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SFF to ISN: distance & flight time
Spokane (Felts Field) → Williston (Sloulin Field International Airport)
633 mi
1,019 km · 550 nm
1h 51m
estimated nonstop flight time
+2h
time difference · heading east
See live SFF→ISN fares Phone-only fares on this route — call free
Flight time details
633 miles nonstop takes roughly 1h 51m gate to gate, flying east. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 2-hour time gain when reading arrival times on your ticket.
The two airports
- SFF — Felts Field · Spokane, United States
- 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 SFF
- GEG · Spokane International Airport11 mi away
- SKA · Fairchild Air Force Base16 mi away
- COE · Coeur D'Alene - Pappy Boyington Field24 mi away
- PUW · Pullman Moscow Regional Airport66 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 SFF from ISN?
The flight distance from Spokane (SFF) to Williston (ISN) is 633 miles (1,019 km, 550 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from SFF to ISN?
A nonstop flight takes about 1h 51m 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 Spokane and Williston?
Williston is 2 hours ahead of Spokane.
What is the cheapest way to fly from SFF to ISN?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on SFF–ISN that never appear on search engines, with no booking fees.