Need help booking?
Unpublished phone-only deals available
GMU to ISN: distance & flight time
Greenville (Greenville Downtown Airport) → Williston (Sloulin Field International Airport)
1,427 mi
2,297 km · 1,240 nm
3h 34m
estimated nonstop flight time
—
time difference · heading northwest
See live GMU→ISN fares Phone-only fares on this route — call free
Flight time details
1,427 miles nonstop takes roughly 3h 34m gate to gate, flying northwest. 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
- GMU — Greenville Downtown Airport · Greenville, 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 GMU
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 GMU from ISN?
The flight distance from Greenville (GMU) to Williston (ISN) is 1,427 miles (2,297 km, 1,240 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from GMU to ISN?
A nonstop flight takes about 3h 34m gate to gate. Actual time varies with winds, routing and season — eastbound transatlantic flights, for example, are usually faster than the return.
Are there nonstop flights from GMU to ISN?
Nonstop service on GMU–ISN depends on the season and the day of week. Run the fare search on this page with the nonstop filter applied to see current direct options; when there is no nonstop, a single connection through a carrier hub adds roughly 2–4 hours to the 3h 34m nonstop estimate.
What is the cheapest way to fly from GMU to ISN?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on GMU–ISN that never appear on search engines, with no booking fees.
Why are some GMU to ISN fares phone-only?
Consolidator contracts let us sell certain GMU–ISN tickets below the price airlines permit us to publish online, so those fares can only be quoted over the phone. Call the travel desk and an agent will check phone-only inventory for your dates.