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OSH to ICN: distance & flight time
Oshkosh (Wittman Regional Airport) → Seoul (Incheon International Airport)
6,398 mi
10,296 km · 5,559 nm
13h 1m
estimated nonstop flight time
+14h
time difference · heading northwest
See live OSH→ICN fares Phone-only fares on this route — call free
Flight time details
6,398 miles nonstop takes roughly 13h 1m gate to gate, flying northwest. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 14-hour time gain when reading arrival times on your ticket.
The two airports
- OSH — Wittman Regional Airport · Oshkosh, 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 OSH
- FLD · Fond du Lac County Airport15 mi away
- ATW · Appleton International Airport19 mi away
- SBM · Sheboygan County Memorial Airport38 mi away
- GRB · Austin Straubel International Airport41 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 OSH from ICN?
The flight distance from Oshkosh (OSH) to Seoul (ICN) is 6,398 miles (10,296 km, 5,559 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from OSH to ICN?
A nonstop flight takes about 13h 1m 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 OSH to ICN?
Nonstop service on OSH–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 13h 1m nonstop estimate.
What is the time difference between Oshkosh and Seoul?
Seoul is 14 hours ahead of Oshkosh.
What is the cheapest way to fly from OSH to ICN?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on OSH–ICN that never appear on search engines, with no booking fees.
Why are some OSH to ICN fares phone-only?
Consolidator contracts let us sell certain OSH–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.