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$365+ Cheap flights from South Korea to Seattle (SEA)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 5/7. Fares are subject to change and may not be available on all flights or dates of travel.
ICN — SEA
Jun 4 — Jun 111
Thu 6/4
Thu 6/11
1 adult, Economy
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Cheap flight deals from South Korea to Seattle

Cheapest flights from South Korea to Seattle
Explore the most affordable flight options available from South Korea to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on May 5, 2026.

This Alaska Airlines deal was found by Cheapflights users on 4/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/157:35 pm
ICN
-
SEA
Nonstop10h 30m
Alaska Airlines
Mon 7/132:05 pm
SEA
-
ICN
Nonstop11h 25m
Alaska Airlines
Deal found 4/30$757
This Alaska Airlines deal was found by Cheapflights users on 4/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/157:35 pm
ICN
-
SEA
Nonstop10h 30m
Alaska Airlines
Fri 7/102:05 pm
SEA
-
ICN
Nonstop11h 25m
Alaska Airlines
Deal found 4/30$795
This United Airlines deal was found by Cheapflights users on 4/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/2312:45 pm
ICN
-
SEA
1 stop20h 09m
United Airlines
Fri 1/13:30 pm
SEA
-
ICN
1 stop21h 10m
United Airlines
Deal found 4/30$817
This Alaska Airlines deal was found by Cheapflights users on 4/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/177:35 pm
ICN
-
SEA
Nonstop10h 00m
Alaska Airlines
Sun 8/22:05 pm
SEA
-
ICN
Nonstop11h 25m
Alaska Airlines
Deal found 4/30$819
This Kiwi.com deal was found by Cheapflights users on 5/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/47:35 pm
ICN
-
SEA
Nonstop10h 00m
Alaska Airlines
Wed 5/61:40 pm
SEA
-
ICN
Nonstop11h 50m
Alaska Airlines
Deal found 5/1$823
This Alaska Airlines deal was found by Cheapflights users on 4/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/197:35 pm
ICN
-
SEA
Nonstop10h 30m
Alaska Airlines
Sun 8/301:35 pm
SEA
-
ICN
Nonstop11h 55m
Alaska Airlines
Deal found 4/30$831
This Alaska Airlines deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/267:35 pm
ICN
-
SEA
Nonstop10h 30m
Alaska Airlines
Wed 7/152:05 pm
SEA
-
ICN
Nonstop11h 25m
Alaska Airlines
Deal found 4/29$832
This Kiwi.com deal was found by Cheapflights users on 4/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/157:35 pm
ICN
-
SEA
Nonstop10h 30m
Multiple Airlines
Mon 7/1312:10 am
SEA
-
ICN
Nonstop11h 50m
Multiple Airlines
Deal found 4/30$840
This Asiana Airlines deal was found by Cheapflights users on 4/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Asiana Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/189:20 pm
ICN
-
SEA
Nonstop9h 55m
Asiana Airlines
Mon 6/112:10 am
SEA
-
ICN
Nonstop12h 20m
Asiana Airlines
Deal found 4/30$855
This Kiwi.com deal was found by Cheapflights users on 4/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/87:00 pm
ICN
-
SEA
Nonstop10h 14m
Korean Air
Tue 10/1312:35 pm
SEA
-
ICN
Nonstop12h 15m
Korean Air
Deal found 4/30$860
This Gotogate deal was found by Cheapflights users on 4/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/87:55 pm
GMP
-
SEA
1 stop34h 30m
ANA
Tue 10/134:30 pm
SEA
-
GMP
1 stop34h 05m
ANA
Deal found 4/30$862
This Trip.com deal was found by Cheapflights users on 5/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/47:40 am
GMP
-
SEA
1 stop22h 45m
ANA
Tue 5/54:30 pm
SEA
-
GMP
1 stop26h 35m
ANA
Deal found 5/1$939

Find flight deals from South Korea to Seattle

Keep the following information in mind while searching for South Korea to Seattle flight deals. Data was last updated May 5, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$757
(Alaska Airlines)

One-way from

$365
(Alaska Airlines)

Popular in

August

Cheapest in

November

Average price

$653

Good round-trip deal

$860 or less

Good one-way deal

$651 or less
Provider with most accurate pricing for Seoul (SEL)-Seattle/Tacoma Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Seoul (SEL)-Seattle/Tacoma Intl flights.
Search Deals
From South Korea to Seattle/Tacoma Intl
Search Deals
One-way flight from South Korea to Seattle/Tacoma Intl
Search Deals
Highest demand for flights based on searches. 10% potential increase in price ($77 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($17 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in May 2026
Search Deals
Price to beat on a round-trip flight from South Korea to Seattle/Tacoma Intl.
Search Deals
Price to beat on a one-way flight from South Korea to Seattle/Tacoma Intl.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from South Korea to Seattle that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated May 5, 2026.
Use the filters below to find and compare flights from South Korea to Seattle that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

IncheonSeattle

ICN - SEA

ICNSEA

Incheon Intl

Wed 6/24

7:35 pm-2:05 pm

Nonstop10h 30m

Seattle/Tacoma Intl

Thu 9/17

1:35 pm-5:30 pm

Nonstop11h 55m

$831

SeoulSeattle

GMP - SEA

GMPSEA

Seoul Gimpo Intl

Thu 10/8

7:55 pm-2:25 pm

1 stop34h 30m

Seattle/Tacoma Intl

Tue 10/13

4:30 pm-6:35 pm

1 stop34h 05m

$864

IncheonSeattle

ICN - SEA

ICNSEA

Incheon Intl

Wed 6/24

7:00 pm-1:25 pm

Nonstop10h 25m

Seattle/Tacoma Intl

Thu 9/17

7:20 am-5:20 pm

1 stop18h 00m

$942
Quickest round-trip

IncheonSeattle

ICN - SEA

ICNSEA

Incheon Intl

Sat 5/16

7:00 pm-1:11 pm

Nonstop10h 11m

Seattle/Tacoma Intl

Tue 6/2

1:05 pm-4:50 pm

Nonstop11h 45m

$988

IncheonSeattle

ICN - SEA

ICNSEA

Incheon Intl

Mon 6/29

7:00 pm-1:25 pm

Nonstop10h 25m

Seattle/Tacoma Intl

Wed 7/15

7:20 am-5:20 pm

1 stop18h 00m

$1,010

IncheonSeattle

ICN - SEA

ICNSEA

Incheon Intl

Thu 6/25

12:45 pm-6:00 am

1 stop33h 15m

Seattle/Tacoma Intl

Wed 7/8

4:30 pm-11:30 am

1 stop27h 00m

$1,011

SeoulSeattle

GMP - SEA

GMPSEA

Seoul Gimpo Intl

Sun 5/17

7:55 pm-2:25 pm

1 stop34h 30m

Seattle/Tacoma Intl

Thu 6/4

4:30 pm-11:05 am

1 stop26h 35m

$1,014

IncheonSeattle

ICN - SEA

ICNSEA

Incheon Intl

Fri 5/8

11:30 am-1:12 am

1 stop29h 42m

Seattle/Tacoma Intl

Mon 5/18

5:00 am-4:20 am

1 stop31h 20m

$1,060

SeoulSeattle

GMP - SEA

GMPSEA

Seoul Gimpo Intl

Mon 5/18

7:55 pm-2:25 pm

1 stop34h 30m

Seattle/Tacoma Intl

Wed 6/3

10:45 am-11:05 am

2 stops32h 20m

$1,079

IncheonSeattle

ICN - SEA

ICNSEA

Incheon Intl

Tue 5/19

4:50 pm-7:54 pm

2 stops19h 04m

Seattle/Tacoma Intl

Wed 7/15

8:35 am-4:20 am

2 stops27h 45m

$1,127

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/30

Showing 1-10 of 59 resultsSorted by cheapest first
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Best time to book a flight from South Korea to Seattle

Have a flexible travel schedule? Discover the best time to fly to Seattle from South Korea with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from South Korea to Seattle

How far ahead should I book a flight from South Korea to Seattle?

The best time to book flights from South Korea to Seattle is 9 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

What is the cheapest month to book a flight from South Korea to Seattle?

Currently, August is the cheapest month in which you can book a flight from South Korea to Seattle (average of $143). Flying from South Korea to Seattle in October is currently the most expensive (average of $982). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from KR to SEA?

Find hourly flight availability from South Korea to Seattle. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated May 5, 2026.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from South Korea to Seattle as you normally would.

Weekly flight availability from South Korea to Seattle

Explore weekly flight availability from South Korea to Seattle. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated May 5, 2026.

The most flights from KR0 to SEA are scheduled on a Friday (10 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (5 on average).

How often are flights from South Korea to Seattle delayed?

About 26% of weekly flights between South Korea and Seattle have experienced delays in the past year, with the average delay time being 164 minutes.

What is the most punctual flight time for South Korea to Seattle flights?

Historically, flights departing in the evening are less likely to be delayed, whereas flights leaving in the morning tend to experience delays more often.

What day of the week experiences the fewest flight delays on this route?

Thursday tends to have the lowest number of delays on this route, whereas Friday has historically faced a higher average of delays compared to other days of the week.

Which airline has the best punctuality record on South Korea to Seattle flights?

Over the last year, Delta have had the lowest number of delays on this route, with just 20% of flights being delayed.

Reviews of airlines servicing Seattle

Get insights into the airlines that provide service to Seattle. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Seattle. Reviews last updated May 5, 2026.
Read reviews from past customers who have flown Korean Air,Asiana Airlines, andAlaska Airlines from South Korea to Seattle. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Korean Air
8.4
Very good
1,216 reviews

Overall

8.4

Crew

8.7

Entertainment

8.2

Boarding

8.5

Comfort

8.3

Food

8.1

Reviews

1 / 20
10.0
Excellent

Jacqueline,Aug 2025

ICN - SEA

Well, I was upset at first because I have a special diet and I need to order vegetarian and I couldn’t do it before the trip, but the stewardess were so nice and they gave me sandwiches that were plant-based which I loved!!
Korean Air
8.4
Very good
1,216 reviews
Korean Air
8.4
Very good
1,216 reviews

Overall

8.4

Crew

8.7

Entertainment

8.2

Boarding

8.5

Comfort

8.3

Food

8.1

Reviews

1 / 20
10.0
Excellent

Jacqueline,Aug 2025

ICN - SEA

Well, I was upset at first because I have a special diet and I need to order vegetarian and I couldn’t do it before the trip, but the stewardess were so nice and they gave me sandwiches that were plant-based which I loved!!
Asiana Airlines
8.1
Very good
530 reviews
Korean Air
8.4
Very good
1,216 reviews

Overall

8.4

Crew

8.7

Entertainment

8.2

Boarding

8.5

Comfort

8.3

Food

8.1

Reviews

1 / 20
10.0
Excellent

Jacqueline,Aug 2025

ICN - SEA

Well, I was upset at first because I have a special diet and I need to order vegetarian and I couldn’t do it before the trip, but the stewardess were so nice and they gave me sandwiches that were plant-based which I loved!!
Alaska Airlines
7.9
Good
12,325 reviews
Korean Air
8.4
Very good
1,216 reviews

Overall

8.4

Crew

8.7

Entertainment

8.2

Boarding

8.5

Comfort

8.3

Food

8.1

Reviews

1 / 20
10.0
Excellent

Jacqueline,Aug 2025

ICN - SEA

Well, I was upset at first because I have a special diet and I need to order vegetarian and I couldn’t do it before the trip, but the stewardess were so nice and they gave me sandwiches that were plant-based which I loved!!
Delta
7.9
Good
8,459 reviews
Korean Air
8.4
Very good
1,216 reviews

Overall

8.4

Crew

8.7

Entertainment

8.2

Boarding

8.5

Comfort

8.3

Food

8.1

Reviews

1 / 20
10.0
Excellent

Jacqueline,Aug 2025

ICN - SEA

Well, I was upset at first because I have a special diet and I need to order vegetarian and I couldn’t do it before the trip, but the stewardess were so nice and they gave me sandwiches that were plant-based which I loved!!
Hawaiian Airlines
7.8
Good
2,837 reviews
Korean Air
8.4
Very good
1,216 reviews

Overall

8.4

Crew

8.7

Entertainment

8.2

Boarding

8.5

Comfort

8.3

Food

8.1

Reviews

1 / 20
10.0
Excellent

Jacqueline,Aug 2025

ICN - SEA

Well, I was upset at first because I have a special diet and I need to order vegetarian and I couldn’t do it before the trip, but the stewardess were so nice and they gave me sandwiches that were plant-based which I loved!!

Related info for your journey

Find useful and relevant information for your journey from South Korea to Seattle. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Seattle from South Korea?

    Seattle/Tacoma Intl (SEA), located 11.4 mi from the city center, is the airport you fly into when you book flights from South Korea to Seattle.

  • How long is the flight from South Korea to Seattle?

    Departing from South Korea to Seattle will take you 10h 11m. South Korea and Seattle are separated by a distance of 5200 mi. Generally, flights for this route are nonstop.

  • What are the cheapest airlines to fly from South Korea to Seattle one-way?

    $245 is the cheapest one-way deal found within the past few days, from Hawaiian Airlines. You may also be able to find cheap deals on Alaska Airlines and Air Canada, with prices starting from $264 and $344, respectively.

  • What are the most popular routes from South Korea to Seattle?

    The most popular flight routes from South Korea to Seattle are Incheon Intl - Seattle/Tacoma Intl, Seoul Gimpo Intl - Seattle/Tacoma Intl and Busan Gimhae - Seattle/Tacoma Intl.

  • What are the most reliable airlines from South Korea to Seattle?

    No one likes to see their flight delayed. When booking a flight from South Korea to Seattle consider choosing Alaska Airlines (80%), Delta (79%) or Korean Air (79%) as they are the most reliable in getting you off to your destination on time.

  • What are the cheapest flights from South Korea to Seattle?

    Looking for the cheapest flight from South Korea to Seattle? While on average our users pay $1,717, our data indicates the cheapest price to be $501. The most popular route (Incheon Intl - Seattle/Tacoma Intl), is priced around $949.

  • Can I find deals for flights from South Korea to Seattle that include hotel bookings?

    Yes. In addition to deals on South Korea to Seattle flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from South Korea to Seattle?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from South Korea to Seattle.

  • Can I find deals for business class flights from South Korea to Seattle?

    Yes. Cheapflights offers flight deals from South Korea to Seattle by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from South Korea to Seattle?

    Currently, August is the cheapest month in which you can book a flight from South Korea to Seattle (average of $143). Flying from South Korea to Seattle in October is currently the most expensive (average of $982). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
SeaTac
Tacoma
Ocean Shores
Olympia
Lynnwood
Lacey
Edmonds
Leavenworth
Snoqualmie
Tumwater
Tukwila
Puyallup
Kent
Renton
Kirkland
Ellensburg
Fife
Lakewood
Issaquah
Shoreline

Browse thousands of different options on Cheapflights for your next trip

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Top 7 airlines flying from South Korea to Seattle

Discover the top 7 airlines that operate flights from South Korea to Seattle. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated May 5, 2026.
AirlineCheapestAverageFlexibilityOn-time
Hawaiian AirlinesCheapest$351Average$866FlexibilityNo cancel feeOn-time85%
Air CanadaCheapest$472Average$518FlexibilityNo cancel feeOn-time67%
Alaska AirlinesCheapest$476Average$596FlexibilityNo cancel feeOn-time75%
Asiana AirlinesCheapest$477Average$612FlexibilityNo cancel feeOn-time76%
DeltaCheapest$485Average$714FlexibilityNo cancel feeOn-timeN/A
Korean AirCheapest$486Average$749FlexibilityNo cancel feeOn-time81%
Alaska AirlinesCheapest$583Average$638FlexibilityNo cancel feeOn-timeN/A

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