Need help booking?
Unpublished phone-only deals available
FSD to ISN: distance & flight time
Sioux Falls (Joe Foss Field Airport) → Williston (Sloulin Field International Airport)
459 mi
739 km · 399 nm
1h 28m
estimated nonstop flight time
Same time
time difference · heading northwest
See live FSD→ISN fares Phone-only fares on this route — call free
Flight time details
459 miles nonstop takes roughly 1h 28m gate to gate, flying northwest. Add 45–90 minutes per connection if there's no nonstop service. Both airports share the same local time, so schedules read exactly as flown.
The two airports
- FSD — Joe Foss Field Airport · Sioux Falls, 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 FSD
- YKN · Chan Gurney Municipal Airport56 mi away
- MHE · Mitchell Municipal Airport66 mi away
- SPW · Spencer Municipal Airport82 mi away
- SUX · Sioux Gateway Col. Bud Day Field83 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 FSD from ISN?
The flight distance from Sioux Falls (FSD) to Williston (ISN) is 459 miles (739 km, 399 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from FSD to ISN?
A nonstop flight takes about 1h 28m 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 cheapest way to fly from FSD to ISN?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on FSD–ISN that never appear on search engines, with no booking fees.