International route
Cheap flights from Seattle to Seoul
Seattle-Tacoma International Airport (SEA) to Incheon International Airport (ICN). 5,204 miles, 10h 50m nonstop.
SEA to ICN at a glance
Computed from airline schedules and the fares we track for this route. Refreshed several times a day.
- Distance
- 5,204 milesgreat-circle
- Typical flight time
- 10h 50mnonstop, gate to gate
- Nonstop airlines
- ASKEOZ3 airlinesAlaska, Korean Air, Asiana
- Nonstop flights per day
- 3all airlines combined
- Cheapest month
- January 2027over the next six months
- Best day to fly
- Tuesday18% less than Sunday
- Time difference
- 16h aheadSeoul vs Seattle
Seattle to Seoul
Round trips from $398
Per traveler, taxes and fees included. Lowest fare we found departs Tue, Jan 5.
Cheapest month: January 2027
See fares on these datesLock any fare free — pay only when you accept your last-minute deal
Or ask an agent on WhatsAppSeattle to Seoul fares by month
Lowest round-trip economy fare per traveler in each of the next six months, taxes and fees included. Select a month to search that date.
Airlines flying Seattle to Seoul
3 airlines fly nonstop with 3 departures a day combined, plus 10 more with one stop.
- ASAlaska AirlinesoneworldNonstop · 1 flight a day · first checked bag from $35
- OZAsiana AirlinesStar AllianceNonstop · 1 flight a day · first checked bag included
- KEKorean AirSkyTeamNonstop · 1 flight a day · first checked bag included
- ACAir CanadaStar AllianceConnecting via YVR · first checked bag from $35
- AAAmerican AirlinesoneworldConnecting via ORD, PHX, LAX · first checked bag from $40
- NHANA All Nippon AirwaysStar AllianceConnecting via HND, NRT · first checked bag included
- CXCathay PacificoneworldConnecting via HKG · first checked bag included
- CIChina AirlinesSkyTeamConnecting via TPE · first checked bag included
- DLDelta Air LinesSkyTeamConnecting via MSP · first checked bag from $35
- BREVA AirStar AllianceConnecting via TPE · first checked bag included
- JLJapan AirlinesoneworldConnecting via HND, NRT, KIX · first checked bag included
- B6JetBlueConnecting via LAX · first checked bag from $40
- UAUnited AirlinesStar AllianceConnecting via ORD, DEN · first checked bag from $40
Connecting options
Hubs where one airline can carry you on both legs, most choices first.
- Chicago (ORD)AAUA2 airlines
- Los Angeles (LAX)AAB62 airlines
- Tokyo (HND)JLNH2 airlines
- Tokyo (NRT)JLNH2 airlines
- Taipei (TPE)BRCI2 airlines
Tips for this route
- Alaska, Korean Air and Asiana all fly SEA to ICN nonstop, so compare the total with bags before picking the lowest base fare: the difference between a basic and a standard economy ticket is often less than one checked bag each way.
- January 2027 is the cheapest month to fly over the next six months, with round trips from $398; September 2026 is the most expensive at $548 and up, a difference of $150 per traveler.
- Departing on a Tuesday averages 18% less than a Sunday on this route. If your dates are flexible, shift the outbound by a day or two and check the calendar view before you book.
- Book 2 to 5 months ahead for the best fares; long-haul seats sell out earliest for summer and holiday travel.
- Seoul is 16 hours ahead of Seattle. Expect to lose 16 hours on the clock heading east, so an overnight or late-afternoon departure tends to arrive at a more usable hour.
Ready to compare live fares?
See every airline on SEA–ICN side by side with bags and seat rules spelled out.
Search Seattle to SeoulSeattle to Seoul: common questions
How long is the flight from Seattle to Seoul?
A nonstop flight from Seattle (SEA) to Seoul (ICN) takes about 10h 50m gate to gate, covering 5,204 miles. Connecting itineraries add the layover, typically 2 to 5 hours more in total.
Which airlines fly nonstop from SEA to ICN?
Alaska Airlines, Korean Air and Asiana Airlines operate nonstop flights from Seattle (SEA) to Seoul (ICN), with 3 nonstop departures a day between them. One-stop options connect through ORD, LAX and HND.
What is the cheapest month to fly from Seattle to Seoul?
Over the next six months, January 2027 has the lowest round-trip fares from Seattle (SEA) to Seoul (ICN), starting at $398 per traveler including taxes and fees. Within any month, Tuesday departures average the lowest prices.
How far in advance should I book Seattle to Seoul flights?
Book 2 to 5 months ahead for the best fares; long-haul seats sell out earliest for summer and holiday travel. Air1 Tickets includes free cancellation within 24 hours of booking on every fare, so you can lock in a good price and keep looking.
What is the time difference between Seattle and Seoul?
Seoul is 16 hours ahead of Seattle. SEA is on America/Los Angeles time and ICN on Asia/Seoul time. Departure and arrival times in search results are always shown in local time at each airport.
Related routes
Other popular city pairs from the same departure city and to the same destination, with the lowest round-trip fares we found.