580 € Cheap Flights from Seattle to Seoul

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Flight deals from Seattle to Seoul

Looking for a cheap last-minute deal or the best return flight from Seattle to Seoul? Find the lowest prices on one-way and return tickets right here.

Find the cheapest month to fly from Seattle to Seoul

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Seattle to Seoul flights are currently cheapest in April.

Direct flights from Seattle to Seoul

Alternative Seattle to Seoul routes

Looking for the cheapest, fastest or easiest route from Seattle to Seoul? You could fly into the following airports instead.

Seattle to Seoul: Flight information

The things to know before you go.
Cheapest flight found580 €
Cheapest month to flyApril
Average flight time11 hrs, 59 mins
Most popular airlineDelta
Average flights per week84

Finding cheap flights from Seattle to Seoul: Frequently asked questions

There are 2 airports in Seoul: Gimpo International and Incheon International.
The best price we found for a return flight from Seattle to Seoul is 580 €. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
11 hours and 59 minutes is the average flight time from Seattle to Seoul.
Delta, Korean Air and Alaska Airlines fly direct from Seattle to Seoul.
As of February 2026, there are 84 flights per week flying from Seattle to Seoul.
The cheapest month to fly from Seattle to Seoul is usually April.
If you're flying from Seattle, the cheapest airport near Seoul is Incheon International – which is 47.8 km away from the centre of Seoul. We've found flights into this airport from 580 €.
After crunching the numbers on our flight calendar, we found that it is currently cheapest to fly from Seattle to Seoul on Tuesday, 7 April 2026.
Yes – the average flight time is 11 hours and 59 minutes.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Seoul but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to Seoul is around 40 days in advance, so don’t leave your flight to the last minute.
In February, the average temperature is usually around -2°C. August is typically the warmest month in Seoul, when it usually averages around 28°C. You can expect the least rain in January. The coldest month is January, with temperatures averaging -8°C. The rainiest month is July.
The cheapest airline that flies to Seoul is Cathay Pacific. And the cheapest airline that flies to Incheon International Airport is Korean Air.

Travelling from Seattle to Seoul: what you need to know

  • Start your travel planning by considering where you'll board your flight from Seattle to Seoul. Seattle-Tacoma International Airport (SEA) and Lake Union Sea Plane Base Airport (LKE) are the main airports in Seattle.

  • Touch down in Seoul at Incheon International Airport (ICN) or Gimpo International Airport (GMP).

  • Take a direct Seattle to Seoul flight and you'll be in transit for an average of 11 hours 45 minutes.

  • The timezone in Seoul is UTC+9, which is 16 hours ahead of Seattle.

  • With 20 weekly flights between the two airports, Seattle-Tacoma International Airport (SEA) to Incheon International Airport (ICN) is the most popular route. Board the first flight from Seattle to Seoul with Korean Air at 11:00. If you'd like to get more out of your day before taking off, the last flight from SEA to ICN is with Asiana Airlines at 14:30.

  • To ensure you make it on your Seattle to Seoul flight, leave enough time to check in and find your gate. Turning up two hours before international departures and one hour before domestic flights is a good rule of thumb.

  • You'll likely experience bigger queues during popular months such as July. Arriving up to four hours in advance for international flights and two hours for domestic departures is a wise move.

How to find the cheapest flights from Seattle to Seoul

  • Score cheap Seattle to Seoul flights by booking five months ahead. Based on our research, that's the sweet spot for picking up a bargain.

  • Schedule your trip for August. That's the best month for landing an incredible deal on plane tickets from Seattle to Seoul. If you're flexible with your dates, use the 'Whole month' tool to see the lowest price across every month.

  • You don't need to search every day to find out if fares have dropped when you set up a Price Alert. We'll notify you as soon as there's a better deal on cheap flights from Seattle to Seoul.

  • Tailor your travel plans using filters. Select your departure and arrival times, airlines and total journey duration. You can also sort the results by 'Cheapest,' 'Fastest' or 'Best' Seattle to Seoul flights.

Flying from Seattle

Seattle-Tacoma International Airport (SEA)

  • Take off from Seattle-Tacoma International Airport (SEA) on a nonstop flight from Seattle to Seoul. From SEA, you can land directly at Incheon International Airport (ICN).

  • Top airlines that offer direct Seattle to Seoul plane tickets from SEA include:

  • Consider adding a stopover to potentially find a cheaper Seattle to Seoul flight. Simply uncheck 'Direct flights only' when searching for departures from Seattle-Tacoma International Airport. Break up your trip (and maybe save some cash) by stopping at one of these popular options:

    • Haneda Airport (HND)

    • Harry Reid Airport (formerly McCarran Airport) (LAS)

    • Vancouver International Airport (YVR)

  • Located around 18 kilometres from central Seattle, SEA can be reached in about 20 minutes by car (depending on traffic). The journey on public transport is roughly 55 minutes.

  • After a leisurely start to your travels? Stay near Seattle-Tacoma International Airport. Whether you have an early flight from Seattle to Seoul or just don't want to be rushed, these hotels are perfect:

  • 81.27% of flights departing from Seattle-Tacoma International Airport reach their destination on schedule. With its strong performance rating, disruptions are unlikely when flying out of SEA.

Arriving in Seoul

Incheon International Airport (ICN)

  • Central Seoul is approximately 48 kilometres from Incheon International Airport (ICN). How long it takes to drive there will vary depending on time of day, so do some research ahead of your trip.

  • If you're using public transport, expect a journey time of about 1 hour 45 minutes.

  • The last thing you want is a long journey to your hotel if you're arriving on a late flight from Seattle to Seoul. Stay at one of these accommodation options near ICN instead:

  • Grab an Incheon International Airport rental car and explore Seoul and beyond with your own wheels. WECAR, Hi Rent A Car and Alamo are leading providers you can book with here.

  • To get the best deal, reserve your vehicle from Incheon International Airport about four weeks ahead of your Seattle to Seoul flight.

Gimpo International Airport (GMP)

  • Central Seoul is approximately 16 kilometres from Gimpo International Airport (GMP). Step off your flight from Seattle to Seoul and then keep an eye out for any airport signs that'll help you reach the city centre.

  • You can expect the trip to take roughly 1 hour 5 minutes on public transport.

  • After your flight from Seattle to Seoul, settle in at a hotel close to GMP. These are some comfortable options that'll help you get into relaxation mode:

  • GOGO Rent a Car, Gogo Rental Car Seoul and Hi Rent A Car make picking up a Gimpo International Airport rental car simple. These reliable suppliers are located around or in the terminal and will have you behind the wheel before you know it.

  • Avoid last-minute price surges. Booking your ride one week ahead of your arrival at GMP will help you save.

Best time to go to Seoul

  • It's time to pick your trip dates for your flight from Seattle to Seoul. July is the busiest month for a trip to Seoul. If you prefer a more peaceful vibe, go in April.

  • When booking your Seattle to Seoul tickets, consider the kind of weather forecast you're hoping for. August is the warmest month in Seoul, with temperatures ranging from 19ºC (66ºF) to 32ºC (90ºF).

  • Search for cheap flights from Seattle to Seoul in January if you like travelling in cooler conditions. Temperatures are at their lowest then, ranging between -12ºC (10ºF) and 4ºC (39ºF) on average.

More about Seoul

Explore more of South Korea

  • Seoul will leave a lasting impression, but there are so many other parts of South Korea you should also see. About 322 kilometres south-east of Seoul, a visit to Busan will keep your itinerary packed. Start with attractions like Haeundae Beach, Gamcheon Culture Village and Beomeosa Temple.

  • If you want to check out another great destination in South Korea, head for Incheon, about 56 kilometres west of Seoul. Lawn Square of Incheon International Airport, Yeongjong Sky City No.23 Park and 스카이72 GC 바다코스 are among the biggest draws.

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.