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OKM to ISN: distance & flight time
Okmulgee (Okmulgee Regional Airport) → Williston (Sloulin Field International Airport)
949 mi
1,528 km · 825 nm
2h 32m
estimated nonstop flight time
Same time
time difference · heading north
See live OKM→ISN fares Phone-only fares on this route — call free
Flight time details
949 miles nonstop takes roughly 2h 32m gate to gate, flying north. 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
- OKM — Okmulgee Regional Airport · Okmulgee, 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 OKM
- RVS · Richard Lloyd Jones Jr Airport26 mi away
- TUL · Tulsa International Airport37 mi away
- CUH · Cushing Municipal Airport50 mi away
- MLC · Mc Alester Regional Airport55 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 OKM from ISN?
The flight distance from Okmulgee (OKM) to Williston (ISN) is 949 miles (1,528 km, 825 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from OKM to ISN?
A nonstop flight takes about 2h 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 cheapest way to fly from OKM to ISN?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on OKM–ISN that never appear on search engines, with no booking fees.