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CPR to ISN: distance & flight time
Casper (Casper-Natrona County International Airport) → Williston (Sloulin Field International Airport)
389 mi
626 km · 338 nm
1h 29m
estimated nonstop flight time
+1h
time difference · heading north
See live CPR→ISN fares Phone-only fares on this route — call free
Flight time details
389 miles nonstop takes roughly 1h 29m 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
- CPR — Casper-Natrona County International Airport · Casper, 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 CPR
- RWL · Rawlins Municipal Airport/Harvey Field85 mi away
- RIW · Riverton Regional Airport101 mi away
- SAA · Shively Field103 mi away
- WRL · Worland Municipal Airport104 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 CPR from ISN?
The flight distance from Casper (CPR) to Williston (ISN) is 389 miles (626 km, 338 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from CPR to ISN?
A nonstop flight takes about 1h 29m 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 Casper and Williston?
Williston is 1 hour ahead of Casper.
What is the cheapest way to fly from CPR to ISN?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on CPR–ISN that never appear on search engines, with no booking fees.