Cheap Flights from Seoul (SEL) to Seattle (SEA) from HK$3,339~

View HK$3,339 flight on Wed, 12 Nov 2025Opens in a new window

Popular airlines from Seoul to Seattle, WA (SEA-Seattle - Tacoma Intl.)

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

Prices were available within the past 7 days and start at HK$3,339 for one-way flights and HK$4,398 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Mon, 22 Dec - Mon, 29 Dec
ICN
Seoul
SEA
Seattle
HK$4,398 Return, found 13 hours ago
HK$4,398
Return
found 13 hours ago
Select United flight, departing Mon, 22 Dec from Seoul to Seattle, returning Mon, 29 Dec, priced at HK$4,398 found 13 hours ago
United
Tue, 9 Sep - Tue, 16 Sep
ICN
Seoul
SEA
Seattle
HK$4,443 Return, found 1 day ago
HK$4,443
Return
found 1 day ago
Select United flight, departing Tue, 9 Sep from Seoul to Seattle, returning Tue, 16 Sep, priced at HK$4,443 found 1 day ago
Asiana Airlines
Mon, 22 Dec - Mon, 29 Dec
ICN
Seoul
SEA
Seattle
HK$4,674 Return, found 13 hours ago
HK$4,674
Return
found 13 hours ago
Select Asiana Airlines flight, departing Mon, 22 Dec from Seoul to Seattle, returning Mon, 29 Dec, priced at HK$4,674 found 13 hours ago
Asiana Airlines
Sat, 27 Sep - Sat, 4 Oct
ICN
Seoul
SEA
Seattle
HK$4,954 Return, found 21 hours ago
HK$4,954
Return
found 21 hours ago
Select Asiana Airlines flight, departing Sat, 27 Sep from Seoul to Seattle, returning Sat, 4 Oct, priced at HK$4,954 found 21 hours ago
Delta
Mon, 22 Dec - Mon, 29 Dec
ICN
Seoul
SEA
Seattle
HK$4,958 Return, found 13 hours ago
HK$4,958
Return
found 13 hours ago
Select Delta flight, departing Mon, 22 Dec from Seoul to Seattle, returning Mon, 29 Dec, priced at HK$4,958 found 13 hours ago
Asiana Airlines
Tue, 9 Sep - Tue, 16 Sep
ICN
Seoul
SEA
Seattle
HK$4,969 Return, found 1 day ago
HK$4,969
Return
found 1 day ago
Select Asiana Airlines flight, departing Tue, 9 Sep from Seoul to Seattle, returning Tue, 16 Sep, priced at HK$4,969 found 1 day ago
Delta
Tue, 9 Sep - Tue, 16 Sep
ICN
Seoul
SEA
Seattle
HK$4,971 Return, found 1 day ago
HK$4,971
Return
found 1 day ago
Select Delta flight, departing Tue, 9 Sep from Seoul to Seattle, returning Tue, 16 Sep, priced at HK$4,971 found 1 day ago
Delta
Mon, 22 Dec - Mon, 29 Dec
ICN
Seoul
SEA
Seattle
HK$5,038 Return, found 13 hours ago
HK$5,038
Return
found 13 hours ago
Select Delta flight, departing Mon, 22 Dec from Seoul to Seattle, returning Mon, 29 Dec, priced at HK$5,038 found 13 hours ago
Korean Air
Mon, 22 Dec - Mon, 29 Dec
ICN
Seoul
SEA
Seattle
HK$5,128 Return, found 13 hours ago
HK$5,128
Return
found 13 hours ago
Select Korean Air flight, departing Mon, 22 Dec from Seoul to Seattle, returning Mon, 29 Dec, priced at HK$5,128 found 13 hours ago
American Airlines
Tue, 9 Sep - Tue, 16 Sep
ICN
Seoul
SEA
Seattle
HK$5,165 Return, found 1 day ago
HK$5,165
Return
found 1 day ago
Select American Airlines flight, departing Tue, 9 Sep from Seoul to Seattle, returning Tue, 16 Sep, priced at HK$5,165 found 1 day ago

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

September is typically the cheapest month to fly

From HK$3,635 - HK$8,744 per traveller.

Graph displaying average flight prices per month

Seoul to Seattle route information
Origin airport
Incheon Intl.
Destination airport
Seattle - Tacoma Intl.
Airlines serving
Air Canada, All Nippon Airways, American Airlines, Asiana Airlines, Cathay Pacific, China Airlines, Delta, EVA Airways, Emirates, Japan Airlines, Korean Air, Lufthansa, Philippine Airlines, Qatar Airways, Turkish Airlines, United, WestJet
Return price
HK$4,398
Distance
8326 km

Flights from Incheon to Seattle

Book cheap flights from Incheon (SEL) to Seattle (SEA) 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 Incheon (SEL) to Seattle (SEA) 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 Incheon (SEL) to Seattle (SEA) trip. Call us at 3077-4857 (direct number - 24 hours day for English).

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

If you would like to book flights to Seattle more flexibly, many prefer to purchase one-way tickets with options to take different airlines. A one way ticket to Seattle is HK$3,339 now!

 

Frequently asked questions

How much is a flight from Seoul (SEL-All Airports) to Sea-Tac Airport?
Within the past 7 days on Expedia, for flights departing within the next year, the lowest price quoted for a round-trip journey between Seoul (SEL-All Airports) and Seattle - Tacoma Intl. Airport (SEA) was HK$4,398. Fares this cheap don't stick around for long, so make sure you book yours ASAP. Prices and availability are subject to change. Additional terms apply.
Do I need to pay a cancellation fee if I cancel my flight from Seoul (SEL-All Airports) to Sea-Tac Airport?
Each air carrier has its own terms and conditions. If you do decide to cancel, follow the easy instructions on our Customer Service Portal.
How do I find cheap flights from Seoul (SEL-All Airports) to SEA 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 Seoul (SEL-All Airports) to SEA flights, you'll see a "no change fees" filter for you to select.
How far is the flight from Seoul (SEL-All Airports) to Sea-Tac Airport?
The distance is around 8,400 kilometers, so pack your carry-on bag with whatever you need to make your journey comfortable. Not sure what to take on board your South Korea to SeaTac flight? Earplugs, a sleep mask and a neck pillow are a few essentials.
Which airlines fly direct from Seoul (SEL-All Airports) to Sea-Tac Airport?
Delta Air Lines (DL) is a top choice. It operates 39 flights from Seoul (SEL-All Airports) to SEA each month. You could also have a look at the fares on offer with Korean Air (KE). It operates 21 monthly flights between South Korea and SeaTac.
Are Seoul (SEL-All Airports) to SEA flight tickets cheaper when they're purchased at the last minute?
Last-minute planners can occasionally find a bargain, with some of the cheapest fares from Seoul (SEL-All Airports) to Sea-Tac Airport cropping up a few weeks before the date of departure. If you'd rather plan ahead, Expedia compares and updates the best flight deals continuously — as early as a year in advance in some cases. It does depend on the carrier though, as not all airlines release prices that far in advance.

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