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

View AU$848 flight on Thu, 23 Oct. 2025Opens in a new window

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

  • Plan, book, fly with confidence

  • trending down icon

    Be in the know

    Get alerts if flight prices drop or rise*
  • bex rewards loyalty icon

    Book smarter

    Save up to 35% on select hotels after you book a flight*
  • payments icon

    Earn twice

    Earn your airline miles on top of our rewards
    Sign in

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

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.

Hawaiian Airlines
Wed, 22 Oct. - Fri, 31 Oct.
ICN
Seoul
SEA
Seattle
AU$840 Return, found 3 days ago
AU$840
Return
found 3 days ago
Select Hawaiian Airlines flight, departing Wed, 22 Oct. from Seoul to Seattle, returning Fri, 31 Oct., priced at AU$840 found 3 days ago
Alaska Airlines
Fri, 28 Nov. - Tue, 2 Dec.
ICN
Seoul
SEA
Seattle
AU$862 Return, found 3 days ago
AU$862
Return
found 3 days ago
Select Alaska Airlines flight, departing Fri, 28 Nov. from Seoul to Seattle, returning Tue, 2 Dec., priced at AU$862 found 3 days ago
Alaska Airlines
Wed, 22 Oct. - Fri, 31 Oct.
ICN
Seoul
SEA
Seattle
AU$870 Return, found 3 days ago
AU$870
Return
found 3 days ago
Select Alaska Airlines flight, departing Wed, 22 Oct. from Seoul to Seattle, returning Fri, 31 Oct., priced at AU$870 found 3 days ago
Asiana Airlines
Sat, 18 Oct. - Mon, 20 Oct.
ICN
Seoul
SEA
Seattle
AU$921 Return, found 6 days ago
AU$921
Return
found 6 days ago
Select Asiana Airlines flight, departing Sat, 18 Oct. from Seoul to Seattle, returning Mon, 20 Oct., priced at AU$921 found 6 days ago
Asiana Airlines
Thu, 18 Dec. - Fri, 2 Jan.
ICN
Seoul
SEA
Seattle
AU$943 Return, found 1 day ago
AU$943
Return
found 1 day ago
Select Asiana Airlines flight, departing Thu, 18 Dec. from Seoul to Seattle, returning Fri, 2 Jan., priced at AU$943 found 1 day ago
Delta
Thu, 18 Dec. - Fri, 2 Jan.
ICN
Seoul
SEA
Seattle
AU$971 Return, found 1 day ago
AU$971
Return
found 1 day ago
Select Delta flight, departing Thu, 18 Dec. from Seoul to Seattle, returning Fri, 2 Jan., priced at AU$971 found 1 day ago
Korean Air
Sat, 18 Oct. - Mon, 20 Oct.
ICN
Seoul
SEA
Seattle
AU$1,011 Return, found 6 days ago
AU$1,011
Return
found 6 days ago
Select Korean Air flight, departing Sat, 18 Oct. from Seoul to Seattle, returning Mon, 20 Oct., priced at AU$1,011 found 6 days ago
United
Sun, 1 Mar. - Sun, 8 Mar.
ICN
Seoul
SEA
Seattle
AU$1,081 Return, just found
AU$1,081
Return
just found
Select United flight, departing Sun, 1 Mar. from Seoul to Seattle, returning Sun, 8 Mar., priced at AU$1,081 just found
Air Canada
Thu, 18 Dec. - Fri, 2 Jan.
ICN
Seoul
SEA
Seattle
AU$1,137 Return, found 1 day ago
AU$1,137
Return
found 1 day ago
Select Air Canada flight, departing Thu, 18 Dec. from Seoul to Seattle, returning Fri, 2 Jan., priced at AU$1,137 found 1 day ago
China Airlines
Sun, 8 Mar. - Sun, 15 Mar.
ICN
Seoul
SEA
Seattle
AU$1,368 Return, just found
AU$1,368
Return
just found
Select China Airlines flight, departing Sun, 8 Mar. from Seoul to Seattle, returning Sun, 15 Mar., priced at AU$1,368 just found

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

September is typically the cheapest month to fly

From AU$716 - AU$1,722 per traveller.

Graph displaying average flight prices per month

Flight from Seoul to Seattle route information
Origin airport
Incheon Intl.
Destination airport
Seattle - Tacoma Intl.
Airlines serving
Air Canada, Alaska Airlines, All Nippon Airways, American Airlines, Asiana Airlines, Cathay Pacific, China Airlines, Delta, EVA Airways, Japan Airlines, Korean Air, United
Return price
AU$840
Distance
8326 km

SEL to SEA Flights

Ready to get away? Use Expedia.com.au to book cheap flights from Incheon to Seattle AU$840, and have leftover money to spare on adventures and activities while you’re in town. We have the world’s largest selection of flights, not to mention lower airfares than you’ll find anywhere else on the Internet.

Our user-friendly tools make it easier than ever to book SEL to SEA flights, even if you’re hoping to hop aboard one of the last-minute flights leaving today. So whether you seek a spontaneous trip to this city’s hottest attractions, or prefer to plan out every detail of your adventure ahead of time, Expedia.com.au is here to help you find exactly what you are interested in.

If you’re on the hunt for cheap flights to Seattle from Incheon, you need not look any further. We make it simple for you to compare different airline carriers or choose the one that appeals to you most. We work with dozens of airlines in order to offer you incredible deals on business and personal travel. Start by searching through our selection of plane tickets today, and you’ll be in the sky before you know it.

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 AU$840. 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 kilometres, 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.

Explore a world of travel with Expedia

Seoul Airports

Seoul

Incheon Intl. to Seattle
AU$840.00
*Available to Expedia members.