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Cheap Flights from Seattle to Seoul
SEA → SEL • About 11h 30m nonstop • 3 airlines
Adults
+12 years old
Children
2-11 years old
Infants
Under 2 years
Fares shown are the lowest we have recorded recently on this route and are not a live quote. Run a search above for today's availability, or call (800) 399-8818 and an agent will price it with you.
Flights from Seattle (SEA) to Seoul (SEL)
The Seattle to Seoul route covers roughly 5,210 miles and takes about 11h 30m nonstop. 3 airlines compete on it — Korean Air, Asiana Airlines, Delta Air Lines — which keeps fares moving and makes it worth comparing carriers rather than defaulting to the one you usually fly. We have seen one-way fares on this route start around $548.
Seoul runs on a scale and speed that surprises first-time visitors — 25 million people in the metro area, a subway that reaches everything, and neighbourhoods that each feel like separate cities.
Five Joseon-era palaces sit within the modern centre, and the DMZ is close enough for a half-day trip.
Airlines flying SEA to SEL
- Korean Air
- Asiana Airlines
- Delta Air Lines
Airports on this route
- Departing: Seattle-Tacoma International Airport (SEA)
- Arriving: Incheon International Airport (ICN)
- Arriving: Gimpo International Airport (GMP)
Best time to fly to Seoul
April through June and September through November. Spring blossom and autumn colour are both spectacular and busy.
Top things to do in Seoul
- Gyeongbokgung Palace
- Bukchon Hanok Village
- Myeongdong
- N Seoul Tower
- DMZ tour
- Gwangjang Market
- Hongdae
How to save on Seattle to Seoul flights
- Shift your departure by one or two days — midweek departures on this route are consistently cheaper than Friday and Sunday.
- Book four to eight weeks ahead. Last-minute fares on SEA to SEL routinely run double the advance price.
- Compare all 3 carriers rather than checking one airline's own site.
- Incheon is regularly ranked the world’s best airport; Gimpo is closer but mostly domestic and regional.
- The AREX express train reaches Seoul Station in about 45 minutes.
- A T-money card covers the subway, buses and most convenience stores.
About flights from Seattle to Seoul
Fares on the SEA to SEL route move with demand, so flexibility is worth more than timing tricks. Shifting your departure by a day or two, flying midweek instead of Friday or Sunday, and booking four to eight weeks ahead all reduce the fare on this route. Our agents also hold consolidator and unpublished fares that do not appear in online results.
Korean Air, Asiana Airlines, Delta Air Lines all operate on this route. Korean Air typically offers the most frequencies, with Asiana Airlines and Delta Air Lines providing competing schedules. Availability varies by season and by which Seattle airport you depart from, so it is worth comparing all carriers before booking.
A nonstop flight takes about 11h 30m. Itineraries with a connection typically add two to four hours depending on the layover city and the length of the stop.
The two cities are roughly 5,210 miles apart by air.
Departures leave from Seattle-Tacoma International Airport (SEA). Arrivals land at Incheon International Airport (ICN), Gimpo International Airport (GMP).
April through June and September through November. Spring blossom and autumn colour are both spectacular and busy.