฿17,300 Cheap Flights from Seattle (SEA) to Seoul (ICN)

View ฿17,300 flight on Tue, 14 Apr 2026Opens 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 and start at ฿17,300 for one-way flights and ฿37,405 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Tue, 28 Apr - Tue, 5 May
SEA
Seattle
ICN
Seoul
฿37,405 Return, found 2 days ago
฿37,405
Return
found 2 days ago
Select Delta flight, departing Tue, 28 Apr from Seattle to Seoul, returning Tue, 5 May, priced at ฿37,405 found 2 days ago
China Airlines
Tue, 28 Apr - Tue, 5 May
SEA
Seattle
ICN
Seoul
฿37,410 Return, found 2 days ago
฿37,410
Return
found 2 days ago
Select China Airlines flight, departing Tue, 28 Apr from Seattle to Seoul, returning Tue, 5 May, priced at ฿37,410 found 2 days ago
Delta
Tue, 28 Apr - Tue, 5 May
SEA
Seattle
ICN
Seoul
฿37,590 Return, found 2 days ago
฿37,590
Return
found 2 days ago
Select Delta flight, departing Tue, 28 Apr from Seattle to Seoul, returning Tue, 5 May, priced at ฿37,590 found 2 days ago
Delta
Tue, 28 Apr - Tue, 5 May
SEA
Seattle
ICN
Seoul
฿37,690 Return, found 2 days ago
฿37,690
Return
found 2 days ago
Select Delta flight, departing Tue, 28 Apr from Seattle to Seoul, returning Tue, 5 May, priced at ฿37,690 found 2 days ago
Delta
Tue, 28 Apr - Tue, 5 May
SEA
Seattle
ICN
Seoul
฿37,720 Return, found 2 days ago
฿37,720
Return
found 2 days ago
Select Delta flight, departing Tue, 28 Apr from Seattle to Seoul, returning Tue, 5 May, priced at ฿37,720 found 2 days ago
Korean Air
Tue, 28 Apr - Tue, 5 May
SEA
Seattle
ICN
Seoul
฿37,750 Return, found 2 days ago
฿37,750
Return
found 2 days ago
Select Korean Air flight, departing Tue, 28 Apr from Seattle to Seoul, returning Tue, 5 May, priced at ฿37,750 found 2 days ago
Asiana Airlines
Tue, 28 Apr - Tue, 5 May
SEA
Seattle
ICN
Seoul
฿37,750 Return, found 2 days ago
฿37,750
Return
found 2 days ago
Select Asiana Airlines flight, departing Tue, 28 Apr from Seattle to Seoul, returning Tue, 5 May, priced at ฿37,750 found 2 days ago
Korean Air
Tue, 28 Apr - Tue, 5 May
SEA
Seattle
ICN
Seoul
฿37,780 Return, found 2 days ago
฿37,780
Return
found 2 days ago
Select Korean Air flight, departing Tue, 28 Apr from Seattle to Seoul, returning Tue, 5 May, priced at ฿37,780 found 2 days ago
Delta
Tue, 28 Apr - Tue, 5 May
SEA
Seattle
ICN
Seoul
฿37,875 Return, found 2 days ago
฿37,875
Return
found 2 days ago
Select Delta flight, departing Tue, 28 Apr from Seattle to Seoul, returning Tue, 5 May, priced at ฿37,875 found 2 days ago
United
Tue, 28 Apr - Tue, 5 May
SEA
Seattle
ICN
Seoul
฿38,720 Return, found 2 days ago
฿38,720
Return
found 2 days ago
Select United flight, departing Tue, 28 Apr from Seattle to Seoul, returning Tue, 5 May, priced at ฿38,720 found 2 days ago

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

October is typically the cheapest month to fly

From ฿23,620 - ฿32,368 per traveller.

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 ฿37,405. 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.

Travel information

Origin airport
Seattle - Tacoma Intl.
Destination airport
Incheon Intl.
Return price
฿37,405
Distance
8326 km
Average flight time
27 hours 57 mins
*Available to Expedia members.