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

View AU$668 flight on Sun, 16 Nov. 2025Opens in a new window

Popular airlines from Seattle-Tacoma International Airport (SEA) to Incheon Intl. Airport (ICN)

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

Prices were available within the past 7 days for one-way flights and round trip tickets for the period specified. Prices and availability are subject to change. Additional terms apply.

Air Canada
Sat, 20 Sep. - Tue, 23 Sep.
SEA
Seattle
ICN
Seoul
AU$1,198 Return, found 2 days ago
AU$1,198
Return
found 2 days ago
Select Air Canada flight, departing Sat, 20 Sep. from Seattle to Seoul, returning Tue, 23 Sep., priced at AU$1,198 found 2 days ago
Air Canada
Sun, 16 Nov. - Sun, 23 Nov.
SEA
Seattle
ICN
Seoul
AU$1,290 Return, found 5 hours ago
AU$1,290
Return
found 5 hours ago
Select Air Canada flight, departing Sun, 16 Nov. from Seattle to Seoul, returning Sun, 23 Nov., priced at AU$1,290 found 5 hours ago
Delta
Sat, 20 Sep. - Tue, 23 Sep.
SEA
Seattle
ICN
Seoul
AU$1,307 Return, found 2 days ago
AU$1,307
Return
found 2 days ago
Select Delta flight, departing Sat, 20 Sep. from Seattle to Seoul, returning Tue, 23 Sep., priced at AU$1,307 found 2 days ago
Delta
Sat, 20 Sep. - Tue, 23 Sep.
SEA
Seattle
ICN
Seoul
AU$1,308 Return, found 2 days ago
AU$1,308
Return
found 2 days ago
Select Delta flight, departing Sat, 20 Sep. from Seattle to Seoul, returning Tue, 23 Sep., priced at AU$1,308 found 2 days ago
Korean Air
Sat, 20 Sep. - Tue, 23 Sep.
SEA
Seattle
ICN
Seoul
AU$1,310 Return, found 2 days ago
AU$1,310
Return
found 2 days ago
Select Korean Air flight, departing Sat, 20 Sep. from Seattle to Seoul, returning Tue, 23 Sep., priced at AU$1,310 found 2 days ago
Korean Air
Sat, 20 Sep. - Tue, 23 Sep.
SEA
Seattle
ICN
Seoul
AU$1,311 Return, found 2 days ago
AU$1,311
Return
found 2 days ago
Select Korean Air flight, departing Sat, 20 Sep. from Seattle to Seoul, returning Tue, 23 Sep., priced at AU$1,311 found 2 days ago
Delta
Sat, 20 Sep. - Tue, 23 Sep.
SEA
Seattle
ICN
Seoul
AU$1,318 Return, found 2 days ago
AU$1,318
Return
found 2 days ago
Select Delta flight, departing Sat, 20 Sep. from Seattle to Seoul, returning Tue, 23 Sep., priced at AU$1,318 found 2 days ago
Asiana Airlines
Sun, 16 Nov. - Sun, 23 Nov.
SEA
Seattle
ICN
Seoul
AU$1,319 Return, found 5 hours ago
AU$1,319
Return
found 5 hours ago
Select Asiana Airlines flight, departing Sun, 16 Nov. from Seattle to Seoul, returning Sun, 23 Nov., priced at AU$1,319 found 5 hours ago
Korean Air
Sat, 20 Sep. - Tue, 23 Sep.
SEA
Seattle
ICN
Seoul
AU$1,321 Return, found 2 days ago
AU$1,321
Return
found 2 days ago
Select Korean Air flight, departing Sat, 20 Sep. from Seattle to Seoul, returning Tue, 23 Sep., priced at AU$1,321 found 2 days ago
Alaska Airlines
Sun, 16 Nov. - Sun, 23 Nov.
SEA
Seattle
ICN
Seoul
AU$1,333 Return, found 5 hours ago
AU$1,333
Return
found 5 hours ago
Select Alaska Airlines flight, departing Sun, 16 Nov. from Seattle to Seoul, returning Sun, 23 Nov., priced at AU$1,333 found 5 hours ago

Find the cheapest month to fly from Seattle (SEA) to Seoul (ICN)

September is typically the cheapest month to fly

From AU$1,224 - AU$1,627 per traveller.

Graph displaying average flight prices per month

Flight from Seattle to Seoul route information
Origin airport
Seattle - Tacoma Intl.
Destination airport
Incheon Intl.
Return price
AU$1,197
Distance
8326 km
Average flight time
27 hours 26 mins

Your quick guide to flights from Seattle to Seoul

Pick up great flights from Seattle to Seoul

With Expedia, you have your pick of 8 flights a day with 20 airlines covering flights from Seattle to Seoul. Whether you’re on a business trip, a family holiday or a luxury break, just enter your travel dates, hit search then check out your choice of flights. Select from return, one way or multi-city flights, and use the advance search tool if you want a direct or refundable flight. You can narrow your search to show you just your preferred cabin class and airline, too. It’s all easy. You can book direct flights from Seattle to Seoul that take around 43 hours.

Find cheap flights from Seattle to Seoul

From the great flight deals with prices currently ranging from AU$1,198 to AU$1,333, you can choose to see the cheapest flights first. Generally, you can book the cheapest flights from Seattle to Seoul around 4 to 6 weeks in advance. If your travel dates are flexible, try to avoid weekends and peak seasons – when you are more likely to grab the lowest prices. Even last minute, there are some impressive deals. The cheapest time to fly to Seoul is normally in September.

Reasons to book your flight from Seattle to Seoul with Expedia

Expedia makes it easy to find, book, and travel, with everything you need all in one place. When you enter your travel details, find fantastic deals just for you on flight tickets from Seattle to Seoul across all the main airline carriers, so you can save time, dollars, and hassle finding the perfect flight. If you think your plans could change, choose refundable flights so any changes won’t cost you more. Book your flight to Seoul right now and, if you join Expedia Rewards, you earn points this time and every time you travel with Expedia.

Frequently asked questions

How much is a flight from SEA to Incheon Airport?
The lowest price advertised for a round-trip flight from SEA to ICN is AU$1,198. But you better get a move on. This price is based on fares available within the last 7 days on Expedia for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.
Do I need to pay a cancellation fee if I cancel my flight from Sea-Tac Airport to Incheon Intl. Airport (ICN)?
The majority of flights can be cancelled online, but whether or not you incur a fee differs between airlines. If you do have to cancel your break, follow the instructions in the Customer Service Portal.
How do I find cheap flights from Seattle - Tacoma Intl. Airport (SEA) to Incheon Airport that have flexible change policies?
Many airlines offer the option to reschedule your flight without a change fee. All you pay is the difference between the original flight and the new flight. When you're searching for SEA to ICN flights, you'll see a "no change fees" filter for you to select.
How far is the flight from Sea-Tac Airport to Incheon Intl. Airport (ICN)?
SeaTac to South Korea is around 8 400 kilometres, so get ready to spend quite a while in the air. Don't forget to pack all the essentials, from your eye mask to your earphones. Throw in a few snacks to munch on throughout your journey too.
Which airlines fly direct from SEA to Incheon Intl. Airport (ICN)?
A leading airline that flies from Seattle - Tacoma Intl. Airport (SEA) to Incheon Airport is Delta Air Lines (DL). It offers 39 flights a month. Offering 21 flights every month on this route, Korean Air (KE) is another good option.
Are Sea-Tac Airport to Incheon Airport flight tickets cheaper when they're purchased at the last minute?
Flight tickets from Seattle - Tacoma Intl. Airport (SEA) to ICN are available up to a year before departure on Expedia. And although you may pick up fantastic last-minute deals, it's not something you should count on. Also, booking your flights ahead of time means you'll have more choices — and you can avoid landing the dreaded middle seat! We're constantly updating our fares to bring you the biggest bargains, so keep checking in for all the latest specials.

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