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SEA to ICN: distance & flight time
Seattle (Seattle Tacoma International Airport) → Seoul (Incheon International Airport)
5,203 mi
8,373 km · 4,521 nm
10h 40m
estimated nonstop flight time
+16h
time difference · heading northwest
See live SEA→ICN fares Phone-only fares on this route — call free
Flight time details
5,203 miles nonstop takes roughly 10h 40m gate to gate, flying northwest. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 16-hour time gain when reading arrival times on your ticket.
The two airports
- SEA — Seattle Tacoma International Airport · Seattle, 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 SEA
- RNT · Renton Municipal Airport5 mi away
- BFI · Boeing Field King County International Airport6 mi away
- TIW · Tacoma Narrows Airport18 mi away
- PWT · Bremerton National Airport21 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 SEA from ICN?
The flight distance from Seattle (SEA) to Seoul (ICN) is 5,203 miles (8,373 km, 4,521 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from SEA to ICN?
A nonstop flight takes about 10h 40m 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 SEA to ICN?
Nonstop service on SEA–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 10h 40m nonstop estimate.
What is the time difference between Seattle and Seoul?
Seoul is 16 hours ahead of Seattle.
What is the cheapest way to fly from SEA to ICN?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on SEA–ICN that never appear on search engines, with no booking fees.
Why are some SEA to ICN fares phone-only?
Consolidator contracts let us sell certain SEA–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.