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$447+ Cheap flights from Seattle (SEA) to South Korea

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 9/10. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — ICN
May 30 — Jun 61
Sat 5/30
Sat 6/6
1 adult, Economy
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Cheap flight deals from Seattle to South Korea

Cheapest flights from Seattle to South Korea
Explore the most affordable flight options available from Seattle to South Korea. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 30, 2026.

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.
Mon 5/41:40 pm
SEA
-
ICN
Nonstop11h 50m
Alaska Airlines
Mon 5/117:35 pm
ICN
-
SEA
Nonstop10h 00m
Alaska Airlines
Deal found 4/29$824
This WhyPayMore deal was found by Cheapflights users on 4/26. 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 WhyPayMore is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/11:40 pm
SEA
-
ICN
Nonstop11h 50m
Alaska Airlines
Sun 5/317:35 pm
ICN
-
SEA
Nonstop10h 00m
Alaska Airlines
Deal found 4/26$831
This Kiwi.com deal was found by Cheapflights users on 4/27. 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 5/117:35 pm
SEA
-
ICN
2 stops34h 05m
Multiple Airlines
Fri 5/157:35 pm
ICN
-
SEA
Nonstop10h 00m
Multiple Airlines
Deal found 4/27$861
This Kiwi.com deal was found by Cheapflights users on 4/25. 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.
Sun 4/267:00 am
SEA
-
ICN
1 stop18h 20m
Korean Air
Mon 5/117:00 pm
ICN
-
SEA
Nonstop10h 11m
Korean Air
Deal found 4/25$870
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/1310:30 am
SEA
-
ICN
3 stops43h 10m
Multiple Airlines
Fri 5/227:35 pm
ICN
-
SEA
Nonstop10h 00m
Multiple Airlines
Deal found 4/29$874
This FlightHub 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/1212:10 am
SEA
-
ICN
Nonstop11h 50m
Asiana Airlines
Mon 8/319:20 pm
ICN
-
SEA
Nonstop10h 25m
Asiana Airlines
Deal found 4/29$882
This Kiwi.com deal was found by Cheapflights users on 4/25. 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 4/3012:50 pm
SEA
-
ICN
Nonstop11h 50m
Korean Air
Sun 5/314:40 pm
ICN
-
SEA
Nonstop10h 00m
Korean Air
Deal found 4/25$883
This Kiwi.com deal was found by Cheapflights users on 4/25. 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.
Wed 4/297:35 am
SEA
-
ICN
1 stop18h 15m
Korean Air
Fri 5/294:40 pm
ICN
-
SEA
Nonstop10h 00m
Korean Air
Deal found 4/25$884
This Kiwi.com deal was found by Cheapflights users on 4/26. 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.
Tue 5/128:41 am
SEA
-
ICN
1 stop20h 59m
Multiple Airlines
Fri 5/227:35 pm
ICN
-
SEA
Nonstop10h 00m
Multiple Airlines
Deal found 4/26$885
This Kiwi.com deal was found by Cheapflights users on 4/27. 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 5/2510:30 am
SEA
-
ICN
2 stops43h 10m
Multiple Airlines
Mon 6/17:35 pm
ICN
-
SEA
Nonstop10h 00m
Multiple Airlines
Deal found 4/27$887
This Kiwi.com deal was found by Cheapflights users on 4/25. 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 5/41:40 pm
SEA
-
ICN
Nonstop11h 50m
Multiple Airlines
Tue 5/198:00 am
ICN
-
SEA
2 stops28h 18m
Multiple Airlines
Deal found 4/25$889
This Kiwi.com deal was found by Cheapflights users on 4/25. 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.
Sun 4/261:40 pm
SEA
-
PUS
1 stop26h 50m
Multiple Airlines
Sun 5/36:35 am
PUS
-
SEA
1 stop23h 00m
Multiple Airlines
Deal found 4/25$988

Find flight deals from Seattle to South Korea

Keep the following information in mind while searching for Seattle to South Korea flight deals. Data was last updated April 30, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$861
(Kiwi.com)

One-way from

$447
(Trip.com)

Popular in

July

Cheapest in

November

Average price

$882

Good round-trip deal

$741 or less

Good one-way deal

$406 or less
Provider with most accurate pricing for Seattle/Tacoma Intl-Seoul (SEL) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Seoul (SEL) flights.
Search Deals
From Seattle/Tacoma Intl to South Korea
Search Deals
One-way flight from Seattle/Tacoma Intl to South Korea
Search Deals
Highest demand for flights based on searches. 12% potential increase in price ($132 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($23 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 2026
Search Deals
Price to beat on a round-trip flight from Seattle/Tacoma Intl to South Korea.
Search Deals
Price to beat on a one-way flight from Seattle/Tacoma Intl to South Korea.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Seattle to South Korea 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 April 30, 2026.
Use the filters below to find and compare flights from Seattle to South Korea that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Sun 5/10

7:08 am-3:00 pm

1 stop15h 52m

Incheon Intl

Sat 6/6

11:30 am-6:47 pm

1 stop23h 17m

$1,088

SeattleBusan

SEA - PUS

SEAPUS

Seattle/Tacoma Intl

Sat 10/17

1:15 am-7:00 pm

1 stop25h 45m

Busan Gimhae

Thu 10/22

10:30 am-7:15 pm

1 stop24h 45m

$1,188

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Mon 5/18

7:08 am-3:00 pm

1 stop15h 52m

Incheon Intl

Wed 6/10

11:30 am-8:53 pm

1 stop25h 23m

$1,195

SeattleSeoul

SEA - GMP

SEAGMP

Seattle/Tacoma Intl

Sun 10/11

1:30 am-6:10 pm

1 stop24h 40m

Seoul Gimpo Intl

Sat 10/17

1:50 pm-9:04 pm

2 stops23h 14m

$1,214
Quickest round-trip

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Sun 8/30

1:05 pm-4:50 pm

Nonstop11h 45m

Incheon Intl

Sat 9/12

7:00 pm-1:37 pm

Nonstop10h 37m

$1,235

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Sat 10/17

7:20 am-5:20 pm

1 stop18h 00m

Incheon Intl

Sun 11/15

4:10 pm-9:00 am

Nonstop9h 50m

$1,239

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Sun 10/18

4:15 pm-4:40 am

1 stop20h 25m

Incheon Intl

Tue 10/20

7:00 pm-1:14 pm

Nonstop10h 14m

$1,242

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Sat 8/8

1:05 pm-4:50 pm

Nonstop11h 45m

Incheon Intl

Wed 8/26

9:00 pm-9:51 pm

1 stop16h 51m

$1,245

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Sun 10/4

9:25 pm-5:20 pm

1 stop27h 55m

Incheon Intl

Mon 10/12

4:40 pm-10:40 am

Nonstop10h 00m

$1,252

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Fri 7/10

5:04 pm-4:20 am

2 stops19h 16m

Incheon Intl

Tue 7/21

4:50 pm-2:36 pm

2 stops37h 46m

$1,256

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/29

Showing 1-10 of 60 resultsSorted by cheapest first
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Best time to book a flight from Seattle to South Korea

Have a flexible travel schedule? Discover the best time to fly to South Korea from Seattle 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 Seattle to South Korea

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

Booking 68 days in advance of your planned departure date is, on average, the best time to get cheap flights from Seattle to South Korea. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

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

Currently, January is the cheapest month in which you can book a flight from Seattle to South Korea (average of $333). Flying from Seattle to South Korea in September is currently the most expensive (average of $1,354). 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 SEA to KR?

Find hourly flight availability from Seattle to South Korea. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated April 30, 2026.

When flying from Seattle to South Korea, the time of day you fly usually plays a role in the price. Save by searching for a flight in the evening, which can drop the price by up to 27% versus a flight in the afternoon.

Weekly flight availability from Seattle to South Korea

Explore weekly flight availability from Seattle to South Korea. 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 April 30, 2026.

The most flights from SEA to KR0 are scheduled on a Wednesday (9 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (5 on average).

How often are flights from Seattle to South Korea delayed?

About 32% of weekly flights between Seattle and South Korea have experienced delays in the past year, with the average delay time being 168 minutes.

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

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

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

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

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

Over the last year, Delta have had the lowest number of delays on this route, with just 19% of flights being delayed.

Reviews of airlines servicing South Korea

Get insights into the airlines that provide service to South Korea. 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 South Korea. Reviews last updated April 30, 2026.
Read reviews from past customers who have flown Korean Air,Asiana Airlines, andAlaska Airlines from Seattle to South Korea. 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

Entertainment

8.2

Comfort

8.3

Food

8.1

Overall

8.4

Crew

8.7

Boarding

8.5

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.
Korean Air
8.4
Very good
1,216 reviews
Korean Air
8.4
Very good
1,216 reviews

Entertainment

8.2

Comfort

8.3

Food

8.1

Overall

8.4

Crew

8.7

Boarding

8.5

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.
Asiana Airlines
8.1
Very good
524 reviews
Korean Air
8.4
Very good
1,216 reviews

Entertainment

8.2

Comfort

8.3

Food

8.1

Overall

8.4

Crew

8.7

Boarding

8.5

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.
Alaska Airlines
7.9
Good
12,319 reviews
Korean Air
8.4
Very good
1,216 reviews

Entertainment

8.2

Comfort

8.3

Food

8.1

Overall

8.4

Crew

8.7

Boarding

8.5

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.
Delta
7.9
Good
8,466 reviews
Korean Air
8.4
Very good
1,216 reviews

Entertainment

8.2

Comfort

8.3

Food

8.1

Overall

8.4

Crew

8.7

Boarding

8.5

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.
Air Canada
7.1
Good
10,981 reviews
Korean Air
8.4
Very good
1,216 reviews

Entertainment

8.2

Comfort

8.3

Food

8.1

Overall

8.4

Crew

8.7

Boarding

8.5

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.

Related info for your journey

Find useful and relevant information for your journey from Seattle to South Korea. 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 from for flights from Seattle to South Korea?

    Located just 11.4 mi from the city center, Seattle/Tacoma Intl (SEA) is the airport most travelers will use when flying to South Korea from Seattle.

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

    A quick flight from Seattle to South Korea can take about 11h 45m. United Airlines provides one of the quickest options available for as low as $1,235. There are 5200 mi between Seattle and South Korea. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

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

    $78 is the cheapest one-way deal found within the past few days, from Frontier. You may also be able to find cheap deals on American Airlines and Southwest, with prices starting from $94 and $97, respectively.

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

    Most travelers choose Seattle/Tacoma Intl - Incheon Intl, Seattle/Tacoma Intl - Seoul Gimpo Intl or Seattle/Tacoma Intl - Jeju City when deciding on the best route from Seattle to South Korea.

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

    The top 3 most reliable airlines when flying from Seattle to South Korea are Thai Airways (96%), Asiana Airlines (96%) and United Airlines (96%).

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

    The cheapest flight price from Seattle to South Korea is $331. On average you can expect to pay $1,384. The most popular route, (Seattle/Tacoma Intl - Incheon Intl), can usually be booked for $897.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Seattle to South Korea 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 Seattle to South Korea?

    Currently, January is the cheapest month in which you can book a flight from Seattle to South Korea (average of $333). Flying from Seattle to South Korea in September is currently the most expensive (average of $1,354). 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

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Top 9 airlines flying from Seattle to South Korea

Discover the top 9 airlines that operate flights from Seattle to South Korea. 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 April 30, 2026.
AirlineCheapestAverageFlexibilityOn-time
Hawaiian AirlinesCheapest$282Average$829FlexibilityNo cancel feeOn-time85%
Alaska AirlinesCheapest$335Average$338FlexibilityNo cancel feeOn-time75%
Alaska AirlinesCheapest$518Average$885FlexibilityNo cancel feeOn-timeN/A
Air CanadaCheapest$524Average$809FlexibilityNo cancel feeOn-time67%
Asiana AirlinesCheapest$690Average$884FlexibilityNo cancel feeOn-time76%
DeltaCheapest$822Average$986FlexibilityNo cancel feeOn-timeN/A
Korean AirCheapest$840Average$1,125FlexibilityNo cancel feeOn-time81%
China AirlinesCheapest$897Average$1,302FlexibilityNo cancel feeOn-time70%
EVA AirCheapest$1,019Average$1,102FlexibilityNo cancel feeOn-time74%

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