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OSN to GFK: distance & flight time
Osan (Osan Air Base) → Grand Forks (Grand Forks International Airport)
5,962 mi
9,594 km · 5,180 nm
12h 9m
estimated nonstop flight time
-14h
time difference · heading northeast
See live OSN→GFK fares Phone-only fares on this route — call free
Flight time details
5,962 miles nonstop takes roughly 12h 9m gate to gate, flying northeast. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 14-hour time set-back when reading arrival times on your ticket.
The two airports
- OSN — Osan Air Base · Osan, South Korea
- GFK — Grand Forks International Airport · Grand Forks, 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 OSN
- ICN · Incheon International Airport41 mi away
- SWU · Suwon Airport10 mi away
- SSN · Seoul Air Base (K-16)25 mi away
- GMP · Gimpo International Airport35 mi away
Near GFK
- RDR · Grand Forks Air Force Base10 mi away
- TVF · Thief River Falls Regional Airport47 mi away
- PMB · Pembina Municipal Airport69 mi away
- FAR · Hector International Airport73 mi away
Frequently asked questions
How far is OSN from GFK?
The flight distance from Osan (OSN) to Grand Forks (GFK) is 5,962 miles (9,594 km, 5,180 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from OSN to GFK?
A nonstop flight takes about 12h 9m 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 OSN to GFK?
Nonstop service on OSN–GFK 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 12h 9m nonstop estimate.
What is the time difference between Osan and Grand Forks?
Grand Forks is 14 hours behind Osan.
What is the cheapest way to fly from OSN to GFK?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on OSN–GFK that never appear on search engines, with no booking fees.
Why are some OSN to GFK fares phone-only?
Consolidator contracts let us sell certain OSN–GFK 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.