Cheap Flights from Seattle (SEA) to Seoul (ICN)

Compare Seattle / Tacoma International to Incheon International flight deals

Find the cheapest month or even day of the year to fly to Incheon International

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Flight deals from Seattle / Tacoma International to Incheon International

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

Seoul.$1,231 per passenger.Departing Thu, 11 Sep, returning Sat, 13 Sep.Return flight with Delta.Outbound indirect flight with Delta, departs from Seattle / Tacoma International on Thu, 11 Sep, arriving in Incheon International.Inbound indirect flight with Delta, departs from Incheon International on Sat, 13 Sep, arriving in Seattle / Tacoma International.Price includes taxes and charges.From $1,231, select.

Seoul.$1,282 per passenger.Departing Mon, 22 Sep, returning Mon, 20 Oct.Return flight with Air Canada.Outbound indirect flight with Air Canada, departs from Seattle / Tacoma International on Mon, 22 Sep, arriving in Incheon International.Inbound indirect flight with Air Canada, departs from Incheon International on Mon, 20 Oct, arriving in Seattle / Tacoma International.Price includes taxes and charges.From $1,282, select.

Seoul.$1,286 per passenger.Departing Thu, 28 Aug, returning Mon, 8 Sep.Return flight with Air Canada.Outbound indirect flight with Air Canada, departs from Seattle / Tacoma International on Thu, 28 Aug, arriving in Incheon International.Inbound indirect flight with Air Canada, departs from Incheon International on Mon, 8 Sep, arriving in Seattle / Tacoma International.Price includes taxes and charges.From $1,286, select.

Seoul.$1,291 per passenger.Departing Sun, 26 Oct, returning Thu, 13 Nov.Return flight with Air Canada.Outbound indirect flight with Air Canada, departs from Seattle / Tacoma International on Sun, 26 Oct, arriving in Incheon International.Inbound indirect flight with Air Canada, departs from Incheon International on Thu, 13 Nov, arriving in Seattle / Tacoma International.Price includes taxes and charges.From $1,291, select.

Seoul.$1,291 per passenger.Departing Tue, 3 Feb, returning Tue, 10 Feb.Return flight with Air Canada.Outbound indirect flight with Air Canada, departs from Seattle / Tacoma International on Tue, 3 Feb, arriving in Incheon International.Inbound indirect flight with Air Canada, departs from Incheon International on Tue, 10 Feb, arriving in Seattle / Tacoma International.Price includes taxes and charges.From $1,291, select.

Seoul.$1,291 per passenger.Departing Wed, 1 Oct, returning Wed, 15 Oct.Return flight with Air Canada.Outbound indirect flight with Air Canada, departs from Seattle / Tacoma International on Wed, 1 Oct, arriving in Incheon International.Inbound indirect flight with Air Canada, departs from Incheon International on Wed, 15 Oct, arriving in Seattle / Tacoma International.Price includes taxes and charges.From $1,291, select.

Seoul.$1,291 per passenger.Departing Tue, 13 Jan, returning Tue, 27 Jan.Return flight with Air Canada.Outbound indirect flight with Air Canada, departs from Seattle / Tacoma International on Tue, 13 Jan, arriving in Incheon International.Inbound indirect flight with Air Canada, departs from Incheon International on Tue, 27 Jan, arriving in Seattle / Tacoma International.Price includes taxes and charges.From $1,291, select.

Seoul.$1,292 per passenger.Departing Tue, 4 Nov, returning Mon, 10 Nov.Return flight with Air Canada.Outbound indirect flight with Air Canada, departs from Seattle / Tacoma International on Tue, 4 Nov, arriving in Incheon International.Inbound indirect flight with Air Canada, departs from Incheon International on Mon, 10 Nov, arriving in Seattle / Tacoma International.Price includes taxes and charges.From $1,292, select.

Find the cheapest month to fly from Seattle / Tacoma International to Incheon International

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

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Direct flights from Seattle / Tacoma International to Incheon International

Seattle / Tacoma International to Incheon International: Alternative routes

Compare routes from Seattle / Tacoma International to Seoul below. You may find an airport to fly into that's cheaper, faster, or easier than Incheon International.

Seattle to Seoul: Flight information

The things to know before you go.

Cheapest flight found	$1,231
Cheapest month to fly	September
Average flight time	11 hrs, 53 mins
Most popular airline	Delta
Average flights per week	72

Finding cheap flights from Seattle / Tacoma International to Incheon International: Frequently asked questions

How much are return flights from Seattle / Tacoma International to Incheon International?

The best price we found for a return flight from Seattle / Tacoma International to Incheon International is $1,231. 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.

How long does it take to fly from Seattle / Tacoma International to Incheon International?

11 hours and 53 minutes is the average flight time from Seattle / Tacoma International to Incheon International.

Which airlines fly direct from Seattle / Tacoma International to Incheon International?

Delta, Korean Air and Asiana Airlines fly direct from Seattle / Tacoma International to Incheon International.

How many flights are there a week from Seattle / Tacoma International to Incheon International?

As of June 2025, there are 72 flights per week flying from Seattle / Tacoma International to Incheon International.

When is the cheapest time to fly from Seattle / Tacoma International to Incheon International?

The cheapest month to fly from Seattle / Tacoma International to Incheon International is usually June 2025.

Which upcoming date is cheapest to fly from Seattle / Tacoma International Airport to Incheon International Airport on?

After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Seattle / Tacoma International Airport to Incheon International Airport on Thursday, 11 September 2025.

Can I get a direct flight from Seattle / Tacoma International Airport to Incheon International Airport?

Yes – the average flight time is 11 hours and 53 minutes.

How can I find the best flight deal to Incheon International?

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 Incheon International 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.

When is the best time to book flights to Seoul?

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.

Which is the cheapest airline to fly from Seattle / Tacoma International Airport to Incheon International with?

Currently, Delta and Asiana Airlines offer the cheapest flight tickets to Incheon International.

Travelling from Seattle-Tacoma International Airport (SEA) to Incheon International Airport (ICN): what you need to know

Hop on a direct flight from Seattle-Tacoma International Airport to Incheon International Airport and you'll be travelling for an average of 11 hours 55 minutes.
Seoul is 16 hours ahead of Seattle and follows the UTC+9 timezone.
Each week, there are 54 Seattle-Tacoma International Airport to Incheon International Airport flights. To take off as soon as possible, opt for the 10:20 Delta Air Lines flight. If you're eager to make the most of your time before flying, the latest flight is at 14:20 with Asiana Airlines.
Arrive at the airport on time so you don't miss your SEA to ICN flight. Be there at least two hours ahead for international flights and an hour early for domestic departures to avoid the stress of rushing.
Travelling during a peak time like July? School holidays and other popular seasons can mean longer queues and delays at check-in and security. Be extra cautious and arrive up to four hours before an international flight and two hours before domestic departures.
With direct flights from Seattle-Tacoma International Airport to Incheon International Airport available through a range of airlines, flying to Seoul (and then other corners of South Korea) is a breeze. Here's who you can fly nonstop with:
The airline that tops the list for bookings on this route is Delta Air Lines.
Delta Air Lines is the most punctual carrier that offers SEA to ICN flights, with 69.75% of its services arriving on schedule.
We make it easy to book a flight with a stopover. To see your options for tickets from Seattle-Tacoma International Airport to Incheon International Airport, uncheck 'Direct flights only.' Then, pick a flight with a stop long enough to visit your chosen city. Stopovers between SEA and ICN include:
- Harry Reid Airport (formerly McCarran Airport)
- Narita International Airport
- Vancouver International Airport

How to find the cheapest flights from Seattle-Tacoma International Airport (SEA) to Incheon International Airport (ICN)

Currently, $684 is the lowest price we've found for a one-way Seattle-Tacoma International Airport to Incheon International Airport flight. The best price for a return plane ticket is $1,236. Remember that fares may change due to availability when booking.
Book nine months before you want to fly. After crunching the numbers on our calendar, this is how far you should book ahead to find cheap tickets from SEA to ICN.
The cheapest month for flights from Seattle-Tacoma International Airport to Incheon International Airport is August. Use the 'Whole month' tool to find the lowest airfares if you have flexible dates.
You don't need to check every day to see if fares have gone down when you create a Price Alert. We'll update you as soon as there's a new deal on cheap flights from SEA to ICN.
Pick your preferred departure and arrival times, number of stops and airlines with the filters. Alternatively, sort your results by 'Cheapest' to find the best deals on flights from Seattle-Tacoma International Airport to Incheon International Airport.

Handy information about Seattle-Tacoma International Airport (SEA)

Seattle-Tacoma International Airport maintains a strong on-time record, so you're less likely to experience disruptions. Departures from SEA land at their destination as scheduled 81.27% of the time.
To reach Seattle-Tacoma International Airport from central Seattle, it'll take around 20 minutes if you're planning to drive. Of course, this depends on traffic conditions. It's approximately 23 kilometres from the airport to the city centre.
Catching public transport? Expect a trip time of around 55 minutes.
Get your trip off to a hassle-free start by staying near SEA. Whether you've booked an early flight from Seattle-Tacoma International Airport to Incheon International Airport or just don't want to be rushed, these stays are ideal:

Arriving at Incheon International Airport (ICN)

The last thing you want is a lengthy journey to your hotel if you're getting in late on a Seattle-Tacoma International Airport to Incheon International Airport flight. Check in to one of these accommodation options near ICN instead:
Pick up an Incheon International Airport rental car and discover Seoul and beyond with your own wheels. WECAR, Hi Rent A Car and Alamo are popular outlets to choose from here.
Booking your ride from Incheon International Airport around four weeks in advance gives you the best shot at securing a great deal.

Getting from Incheon International Airport (ICN) to central Seoul

Incheon International Airport to the centre of Seoul is about 48 kilometres. Journey times will vary based on the time of day and traffic conditions, so checking a navigation app for real-time estimates is always a good idea.
Travelling by public transport takes around 1 hour 45 minutes.

When to fly to Incheon International Airport (ICN)

July is the most popular month for flights from Seattle-Tacoma International Airport to Incheon International Airport. To escape the crowds, go to Seoul in April.
The warmest month in Seoul is August, with the temperature ranging between 19ºC (66ºF) and 32ºC (90ºF). Lock in your flights from Seattle-Tacoma International Airport to Incheon International Airport in this month if this is the type of weather you like.
January has average temperatures of between -12ºC (10ºF) and 4ºC (39ºF). Search for cheap tickets from SEA to ICN around that time if you like travelling in cooler conditions.

Explore more of South Korea

You've seen Seoul, now it's time to explore other corners of South Korea. Journey about 322 kilometres south-east to Busan to check off its top sights. From Haeundae Beach to Gamcheon Culture Village and Beomeosa Temple, your itinerary will be busy.
If you're interested in discovering another major stop in South Korea, consider Incheon, about 56 kilometres west of Seoul. Lawn Square of Incheon International Airport, Yeongjong Sky City No.23 Park and 스카이72 GC 바다코스 are key highlights.