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OSN to SPF: distance & flight time
Osan (Osan Air Base) → Spearfish-South Dakota (Black Hills Airport-Clyde Ice Field)
5,969 mi
9,606 km · 5,187 nm
12h 10m
estimated nonstop flight time
-15h
time difference · heading northeast
See live OSN→SPF fares Phone-only fares on this route — call free
Flight time details
5,969 miles nonstop takes roughly 12h 10m gate to gate, flying northeast. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 15-hour time set-back when reading arrival times on your ticket.
The two airports
- OSN — Osan Air Base · Osan, South Korea
- SPF — Black Hills Airport-Clyde Ice Field · Spearfish-South Dakota, 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 SPF
- RCA · Ellsworth Air Force Base41 mi away
- RAP · Rapid City Regional Airport47 mi away
- GCC · Gillette Campbell County Airport87 mi away
- CDR · Chadron Municipal Airport119 mi away
Frequently asked questions
How far is OSN from SPF?
The flight distance from Osan (OSN) to Spearfish-South Dakota (SPF) is 5,969 miles (9,606 km, 5,187 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from OSN to SPF?
A nonstop flight takes about 12h 10m 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 SPF?
Nonstop service on OSN–SPF 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 10m nonstop estimate.
What is the time difference between Osan and Spearfish-South Dakota?
Spearfish-South Dakota is 15 hours behind Osan.
What is the cheapest way to fly from OSN to SPF?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on OSN–SPF that never appear on search engines, with no booking fees.
Why are some OSN to SPF fares phone-only?
Consolidator contracts let us sell certain OSN–SPF 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.