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RAP to ISN: distance & flight time
Rapid City (Rapid City Regional Airport) → Williston (Sloulin Field International Airport)
287 mi
462 km · 249 nm
1h 13m
estimated nonstop flight time
+1h
time difference · heading north
See live RAP→ISN fares Phone-only fares on this route — call free
Flight time details
287 miles nonstop takes roughly 1h 13m gate to gate, flying north. 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
- RAP — Rapid City Regional Airport · Rapid City, 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 RAP
- RCA · Ellsworth Air Force Base7 mi away
- SPF · Black Hills Airport-Clyde Ice Field47 mi away
- CDR · Chadron Municipal Airport83 mi away
- GCC · Gillette Campbell County Airport125 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 RAP from ISN?
The flight distance from Rapid City (RAP) to Williston (ISN) is 287 miles (462 km, 249 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from RAP to ISN?
A nonstop flight takes about 1h 13m 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 Rapid City and Williston?
Williston is 1 hour ahead of Rapid City.
What is the cheapest way to fly from RAP to ISN?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on RAP–ISN that never appear on search engines, with no booking fees.