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BOI to ISN: distance & flight time
Boise (Boise Air Terminal/Gowen Field) → Williston (Sloulin Field International Airport)
683 mi
1,099 km · 593 nm
1h 57m
estimated nonstop flight time
+1h
time difference · heading northeast
See live BOI→ISN fares Phone-only fares on this route — call free
Flight time details
683 miles nonstop takes roughly 1h 57m gate to gate, flying northeast. 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
- BOI — Boise Air Terminal/Gowen Field · Boise, 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 BOI
- MUO · Mountain Home Air Force Base40 mi away
- ONO · Ontario Municipal Airport50 mi away
- MYL · McCall Municipal Airport92 mi away
- SUN · Friedman Memorial Airport97 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 BOI from ISN?
The flight distance from Boise (BOI) to Williston (ISN) is 683 miles (1,099 km, 593 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from BOI to ISN?
A nonstop flight takes about 1h 57m 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 Boise and Williston?
Williston is 1 hour ahead of Boise.
What is the cheapest way to fly from BOI to ISN?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on BOI–ISN that never appear on search engines, with no booking fees.