Seoul to Seattle (ICN–SEA) — Airlines, Schedules & Connections
No flights match your filters.
No scheduled airline flights on this route — it's flown by charter / private operators (). No nonstop flights on this route. connecting options below.
Most recently operated nonstop flights — the month shown is when each was last scheduled. Most destinations remain reachable with a connection.
No discontinued nonstop flights on record for this route.
ICN–SEA is served by 6 airlines with nonstop service. Korean Air, Delta Air Lines and Alaska Airlines lead the route. The flight covers 5,203 miles in approximately 9h 55m. Beyond nonstop, 1-stop connecting options are also available.
Airline Landscape
| Airline | Freq/wk | Aircraft | Duration | Dep OTP | Alliance | Codeshares |
|---|---|---|---|---|---|---|
| KE Korean Air | 14 | 359, 781 | 10h-10h37 | – | SkyTeam | – |
| DL Delta Air Lines | 7 | 359 | 9h51 | – | SkyTeam | – |
| AS Alaska Airlines | 6 | 789 | 10h05 | – | Oneworld | – |
| OZ Asiana Airlines Also: SQ, TG | 5 | 772 | 9h55 | – | Star Alliance | SQ, TG |
| HA Hawaiian Airlines | 0 | – | – | – | – | – |
| PR Philippine Airlines | 0 | – | – | – | – | – |
Weekly Schedule Pattern
Connection Landscape
On-Time Performance
Travel Essentials
ICN: KST · SEA: PDT
When it's 6:00 PM in Seoul, it's 2:00 AM in Seattle.
South Korean passport holders enter the United States under the Visa Waiver Program (VWP) for up to 90 days for tourism or business. You must obtain an approved ESTA (Electronic System for Travel Authorization) at esta.cbp.dhs.gov before travel. The ESTA costs $21, is processed within 72 hours (often minutes), and is valid for 2 years or until your passport expires, whichever comes first. Passport must be a biometric e-passport.
At US immigration, you clear CBP (Customs and Border Protection) where an officer reviews your ESTA, asks about your trip purpose, takes fingerprints and a photo, and determines your allowed stay (up to 90 days). Have your return ticket, hotel booking, and a general idea of your itinerary ready to answer questions. The 90-day VWP stay cannot be extended, and overstaying voids your ESTA and future VWP eligibility. For stays beyond 90 days or work purposes, apply for a visa at the US Embassy in Seoul.
Direct flights from Seoul Incheon to multiple US cities run 10 to 14 hours: Los Angeles (LAX) 11 hours, San Francisco (SFO) 11 hours 30 minutes, New York JFK 14 hours, Seattle (SEA) 10 hours, Dallas (DFW) 13 hours, and Atlanta (ATL) 14 hours. Korean Air, Asiana, Delta, United, and American all operate transpacific routes. The US uses the US dollar. No mandatory vaccinations. Global Entry ($100, valid 5 years) includes ESTA and provides expedited entry through automated kiosks at major US airports, a strong investment for frequent visitors.
AREX (Airport Railroad Express) runs two services from Seoul Station: the Direct Train (43 min, ₩11,000, reserved seats) and the All-Stop train (66 min, ₩4,550, unreserved). Both trains serve T1 first, then T2; confirm which terminal your airline uses before boarding.Limousine buses depart from major Seoul neighborhoods and hotels (₩16,000–18,000, 60–90 min depending on traffic). KAL and LIMOUSINE services are reliable. Taxis from central Seoul cost ₩65,000–80,000 and take 60–90 minutes. Deluxe (black) taxis are pricier but English-speaking drivers are more common.
Link Light Rail from the airport station (inside the terminal) to downtown Seattle takes 38 minutes ($3.50). No transfers needed; trains run 5am to 1am daily.Taxis and ride-shares to downtown cost $35–55. For Bellevue and Eastside destinations (across Lake Washington), ride-share is faster than Link. Car rentals are in the consolidated rental facility; take the free shuttle from baggage claim. Sound Transit buses serve Tacoma, Renton, and Federal Way.
Marine west coast climate. Winters are mild but persistently grey and rainy (3–9°C). Snow is rare at sea level but can occur December through February, causing significant disruptions when it does. The airport sits between Seattle and Tacoma in an area that receives more fog and low cloud than downtown Seattle.
Summers are famously pleasant (18–25°C) with low humidity and mostly clear skies, one of the best flying climates in the US from June through September. The wettest months are November through January.
ICN–SEA Quick Facts
Frequently Asked Questions
Flights from ICN to SEA
Incheon International Airport (ICN) and Seattle–Tacoma International Airport (SEA) are connected by nonstop service from Korean Air, Delta Air Lines, Alaska Airlines, Asiana Airlines, Hawaiian Airlines and Philippine Airlines. With 42 weekly departures, this is a heavily served route.
ICN to SEA Flight Duration and Schedule
Nonstop flight time from ICN to SEA is about 9 hours 55 minutes gate to gate. The route covers a distance of 5,203 miles (8,373 km). There are approximately 42 weekly flights outbound and 37 return, totaling 79 flights per week in both directions.
Connecting Options and Alternatives
1-stop connecting options are also available, commonly via Ted Stevens Anchorage, Vancouver and Narita. Two-stop connections are also available via intermediate hubs.