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CYS to ISN: distance & flight time
Cheyenne (Cheyenne Regional Jerry Olson Field) → Williston (Sloulin Field International Airport)
489 mi
786 km · 425 nm
1h 32m
estimated nonstop flight time
+1h
time difference · heading north
See live CYS→ISN fares Phone-only fares on this route — call free
Flight time details
489 miles nonstop takes roughly 1h 32m 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
- CYS — Cheyenne Regional Jerry Olson Field · Cheyenne, 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 CYS
- LAR · Laramie Regional Airport46 mi away
- DEN · Denver International Airport90 mi away
- FNL · Northern Colorado Regional Airport50 mi away
- GXY · Greeley–Weld County Airport51 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 CYS from ISN?
The flight distance from Cheyenne (CYS) to Williston (ISN) is 489 miles (786 km, 425 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from CYS to ISN?
A nonstop flight takes about 1h 32m 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 Cheyenne and Williston?
Williston is 1 hour ahead of Cheyenne.
What is the cheapest way to fly from CYS to ISN?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on CYS–ISN that never appear on search engines, with no booking fees.