Cheap Flights from Seattle (SEA) to Seoul (ICN) from HK$3,402~

View HK$3,402 flight on Sat, 27 Sep 2025Opens in a new window

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

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

Prices were available within the past 7 days and start at HK$3,402 for one-way flights and HK$6,272 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Air Canada
Wed, 10 Sep - Wed, 17 Sep
SEA
Seattle
ICN
Seoul
HK$6,272 Return, found 2 hours ago
HK$6,272
Return
found 2 hours ago
Select Air Canada flight, departing Wed, 10 Sep from Seattle to Seoul, returning Wed, 17 Sep, priced at HK$6,272 found 2 hours ago
Air Canada
Mon, 1 Sep - Mon, 8 Sep
SEA
Seattle
ICN
Seoul
HK$6,273 Return, found 2 days ago
HK$6,273
Return
found 2 days ago
Select Air Canada flight, departing Mon, 1 Sep from Seattle to Seoul, returning Mon, 8 Sep, priced at HK$6,273 found 2 days ago
Delta
Sat, 27 Sep - Tue, 7 Oct
SEA
Seattle
ICN
Seoul
HK$6,612 Return, found 6 hours ago
HK$6,612
Return
found 6 hours ago
Select Delta flight, departing Sat, 27 Sep from Seattle to Seoul, returning Tue, 7 Oct, priced at HK$6,612 found 6 hours ago
Delta
Sat, 27 Sep - Tue, 7 Oct
SEA
Seattle
ICN
Seoul
HK$6,619 Return, found 6 hours ago
HK$6,619
Return
found 6 hours ago
Select Delta flight, departing Sat, 27 Sep from Seattle to Seoul, returning Tue, 7 Oct, priced at HK$6,619 found 6 hours ago
Korean Air
Sat, 27 Sep - Tue, 7 Oct
SEA
Seattle
ICN
Seoul
HK$6,626 Return, found 6 hours ago
HK$6,626
Return
found 6 hours ago
Select Korean Air flight, departing Sat, 27 Sep from Seattle to Seoul, returning Tue, 7 Oct, priced at HK$6,626 found 6 hours ago
Korean Air
Sat, 27 Sep - Tue, 7 Oct
SEA
Seattle
ICN
Seoul
HK$6,633 Return, found 6 hours ago
HK$6,633
Return
found 6 hours ago
Select Korean Air flight, departing Sat, 27 Sep from Seattle to Seoul, returning Tue, 7 Oct, priced at HK$6,633 found 6 hours ago
Delta
Sat, 27 Sep - Tue, 7 Oct
SEA
Seattle
ICN
Seoul
HK$6,670 Return, found 6 hours ago
HK$6,670
Return
found 6 hours ago
Select Delta flight, departing Sat, 27 Sep from Seattle to Seoul, returning Tue, 7 Oct, priced at HK$6,670 found 6 hours ago
Korean Air
Sat, 27 Sep - Tue, 7 Oct
SEA
Seattle
ICN
Seoul
HK$6,677 Return, found 6 hours ago
HK$6,677
Return
found 6 hours ago
Select Korean Air flight, departing Sat, 27 Sep from Seattle to Seoul, returning Tue, 7 Oct, priced at HK$6,677 found 6 hours ago
Asiana Airlines
Sat, 27 Sep - Tue, 7 Oct
SEA
Seattle
ICN
Seoul
HK$6,706 Return, found 6 hours ago
HK$6,706
Return
found 6 hours ago
Select Asiana Airlines flight, departing Sat, 27 Sep from Seattle to Seoul, returning Tue, 7 Oct, priced at HK$6,706 found 6 hours ago
American Airlines
Wed, 10 Sep - Wed, 17 Sep
SEA
Seattle
ICN
Seoul
HK$7,736 Return, found 2 hours ago
HK$7,736
Return
found 2 hours ago
Select American Airlines flight, departing Wed, 10 Sep from Seattle to Seoul, returning Wed, 17 Sep, priced at HK$7,736 found 2 hours ago

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

September is typically the cheapest month to fly

From HK$6,257 - HK$8,317 per traveller.

Graph displaying average flight prices per month

Seattle to Seoul route information
Origin airport
Seattle - Tacoma Intl.
Destination airport
Incheon Intl.
Airlines serving
Air Canada, American Airlines, Asiana Airlines, Cathay Pacific, China Airlines, Delta, EVA Airways, Korean Air, United, WestJet
Return price
HK$6,272
Distance
8326 km
Average flight time
27 hours 26 mins

Flights from Seattle to Incheon

Book cheap flights from Seattle (SEA) to Incheon (ICN) on Expedia.com.hk. Find the best flight deals to destinations around the world for your next leisure or business travel on Expedia.com.hk.

Search for flights from Seattle (SEA) to Incheon (ICN) to find great flight deals suitable to your travel date and time. Expedia.com.hk flight booking search engine is simple to use and looking for cheap flights is as easy as a click of a mouse or on your mobile devices.

Be assured that you’re seeing the best price guaranteed! Our friendly customer service representatives are here to serve you 24 hours day to provide assistance and answer any questions that you may have about booking your Seattle (SEA) to Incheon (ICN) trip. Call us at 3077-4857 (direct number - 24 hours day for English).

Save more when combine your Incheon flight with a hotel for a package deal! Discover additional savings by booking in advance. Now you can find activities in Incheon and things to do in Incheon for your perfect vacation with Expedia Thing to Do.

If you would like to book flights to Incheon more flexibly, many prefer to purchase one-way tickets with options to take different airlines. A one way ticket to Incheon is HK$3,402 now!

 

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 HK$6,272. 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 canceled 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 kilometers, 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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