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SPF to ICN: distance & flight time
Spearfish-South Dakota (Black Hills Airport-Clyde Ice Field) → Seoul (Incheon International Airport)
5,965 mi
9,599 km · 5,183 nm
12h 10m
estimated nonstop flight time
+15h
time difference · heading northwest
See live SPF→ICN fares Phone-only fares on this route — call free
Flight time details
5,965 miles nonstop takes roughly 12h 10m gate to gate, flying northwest. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 15-hour time gain when reading arrival times on your ticket.
The two airports
- SPF — Black Hills Airport-Clyde Ice Field · Spearfish-South Dakota, United States
- ICN — Incheon International Airport · Seoul, South Korea
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 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
Near ICN
- GMP · Gimpo International Airport20 mi away
- SWU · Suwon Airport34 mi away
- SSN · Seoul Air Base (K-16)36 mi away
- OSN · Osan Air Base41 mi away
Frequently asked questions
How far is SPF from ICN?
The flight distance from Spearfish-South Dakota (SPF) to Seoul (ICN) is 5,965 miles (9,599 km, 5,183 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from SPF to ICN?
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 SPF to ICN?
Nonstop service on SPF–ICN 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 Spearfish-South Dakota and Seoul?
Seoul is 15 hours ahead of Spearfish-South Dakota.
What is the cheapest way to fly from SPF to ICN?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on SPF–ICN that never appear on search engines, with no booking fees.
Why are some SPF to ICN fares phone-only?
Consolidator contracts let us sell certain SPF–ICN 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.