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$293+ 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 11/17. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — ICN
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
1 adult, Economy
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Cheap 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 September 11, 2025.

Round-trip from

$781
(Mytrip)

One-way from

$293
(Kiwi.com)

Popular in

June

Cheapest in

February

Average price

$984

Good round-trip deal

$686 or less

Good one-way deal

$372 or less
From Seattle/Tacoma Intl to South Korea
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One-way flight from Seattle/Tacoma Intl to South Korea
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Highest demand for flights based on searches. 16% potential increase in price ($219 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($38 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Price to beat on a round-trip flight from Seattle/Tacoma Intl to South Korea.
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Price to beat on a one-way flight from Seattle/Tacoma Intl to South Korea.
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Find 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 September 11, 2025.

This Kiwi.com deal was found by Cheapflights users on 9/10. 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.
Fri 10/171:50 pmSEA - ICN
1 stop37h 50mMultiple Airlines
Sat 11/19:20 pmICN - SEA
2 stops30h 03mMultiple Airlines
Deal found 9/10$781
This Kiwi.com deal was found by Cheapflights users on 9/10. 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 9/178:40 amSEA - ICN
1 stop18h 05mMultiple Airlines
Tue 11/49:20 pmICN - SEA
1 stop16h 17mMultiple Airlines
Deal found 9/10$782
This Kiwi.com deal was found by Cheapflights users on 9/10. 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 11/125:57 pmSEA - ICN
2 stops32h 28mMultiple Airlines
Sun 11/169:00 pmICN - SEA
Nonstop9h 55mMultiple Airlines
Deal found 9/10$783
This Delta deal was found by Cheapflights users on 9/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/1312:50 pmSEA - ICN
Nonstop11h 50mDelta
Mon 9/224:40 pmICN - SEA
Nonstop10h 00mDelta
Deal found 9/10$784
This Kiwi.com deal was found by Cheapflights users on 9/10. 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.
Sat 9/207:00 amSEA - ICN
2 stops40h 45mMultiple Airlines
Sat 10/258:45 pmICN - SEA
1 stop33h 35mMultiple Airlines
Deal found 9/10$785
This FlightHub deal was found by Cheapflights users on 9/10. 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.
Thu 11/610:05 amSEA - ICN
1 stop14h 05mAir Canada
Thu 11/206:55 pmICN - SEA
1 stop17h 21mAir Canada
Deal found 9/10$786
This United Airlines deal was found by Cheapflights users on 9/11. 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.
Fri 11/77:00 amSEA - ICN
1 stop16h 15mUnited Airlines
Tue 11/256:00 pmICN - SEA
1 stop15h 15mUnited Airlines
Deal found 9/11$787
This Delta deal was found by Cheapflights users on 9/11. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/199:25 pmSEA - ICN
1 stop27h 55mDelta
Fri 11/74:10 pmICN - SEA
Nonstop9h 50mDelta
Deal found 9/11$788
This Delta deal was found by Cheapflights users on 9/11. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/263:55 pmSEA - ICN
1 stop27h 20mDelta
Thu 10/308:05 pmICN - SEA
Nonstop10h 15mDelta
Deal found 9/11$789
This Kiwi.com deal was found by Cheapflights users on 9/10. 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.
Sat 10/188:40 amSEA - ICN
1 stop19h 00mMultiple Airlines
Tue 10/219:05 pmICN - SEA
1 stop14h 00mMultiple Airlines
Deal found 9/10$790
This FlightHub deal was found by Cheapflights users on 9/10. 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.
Sat 11/18:00 pmSEA - ICN
1 stop29h 10mAir Canada
Sat 11/226:55 pmICN - SEA
1 stop17h 21mAir Canada
Deal found 9/10$791
This Air Canada deal was found by Cheapflights users on 9/10. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/217:15 pmSEA - ICN
1 stop28h 50mAir Canada
Tue 10/285:55 pmICN - SEA
1 stop20h 11mAir Canada
Deal found 9/10$792

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 September 11, 2025.
Use the filters below to find and compare flights from Seattle to South Korea that are best for you.

Fly from

Seattle

Fly to

South Korea

Route

Depart

Return

Price

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Mon 9/29

3:55 pm-11:15 am

1 stop27h 20m

Incheon Intl

Mon 11/24

8:05 pm-1:20 pm

Nonstop10h 15m

$789

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Fri 11/21

10:05 am-5:10 pm

1 stop14h 05m

Incheon Intl

Wed 11/26

6:55 pm-2:31 pm

1 stop12h 36m

$813

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Sun 10/19

12:15 pm-4:30 pm

Nonstop12h 15m

Incheon Intl

Fri 10/31

8:05 pm-2:20 pm

Nonstop10h 15m

$830

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Tue 9/23

12:50 pm-4:40 pm

Nonstop11h 50m

Incheon Intl

Sat 11/1

4:10 pm-10:00 am

Nonstop9h 50m

$831

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Tue 10/21

7:44 am-7:00 pm

1 stop19h 16m

Incheon Intl

Fri 10/24

8:35 pm-2:35 pm

Nonstop10h 00m

$834

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Sun 11/9

8:00 am-7:25 pm

1 stop18h 25m

Incheon Intl

Sat 11/15

8:35 pm-1:55 pm

Nonstop10h 20m

$834

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Sat 10/4

7:20 am-5:20 pm

1 stop18h 00m

Incheon Intl

Sat 10/11

4:40 pm-10:40 am

Nonstop10h 00m

$834

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Wed 10/1

7:20 am-5:20 pm

1 stop18h 00m

Incheon Intl

Wed 11/19

4:10 pm-9:00 am

Nonstop9h 50m

$834

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Wed 11/5

1:45 pm-6:35 pm

Nonstop11h 50m

Incheon Intl

Mon 11/17

9:25 pm-5:35 am

1 stop25h 10m

$840

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Mon 12/1

11:30 am-4:30 pm

Nonstop12h 00m

Incheon Intl

Sat 12/6

8:05 pm-1:20 pm

Nonstop10h 15m

$854

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/11

Showing 1-10 of 54 results
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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

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

Currently, February is the cheapest month in which you can book a flight from Seattle to South Korea (average of $990). Flying from Seattle to South Korea in December is currently the most expensive (average of $1,633). 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 September 11, 2025.

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

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 September 11, 2025.

The most flights from SEA to KR0 are scheduled on a Thursday (8 on average). You will have fewer flight options on Friday, which is when the least amount of flights are scheduled (1 on average).

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 September 11, 2025.
Read reviews from past customers who have flown Korean Air, China Airlines, and Asiana 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
1,139 reviews

Food

8.1

Boarding

8.5

Overall

8.4

Entertainment

8.2

Crew

8.7

Comfort

8.3

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
1,139 reviews
Korean Air
8.4
Very good
1,139 reviews

Food

8.1

Boarding

8.5

Overall

8.4

Entertainment

8.2

Crew

8.7

Comfort

8.3

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.
China Airlines
8.3
Very good
767 reviews
Korean Air
8.4
Very good
1,139 reviews

Food

8.1

Boarding

8.5

Overall

8.4

Entertainment

8.2

Crew

8.7

Comfort

8.3

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
8.2
Very good
479 reviews
Korean Air
8.4
Very good
1,139 reviews

Food

8.1

Boarding

8.5

Overall

8.4

Entertainment

8.2

Crew

8.7

Comfort

8.3

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
8.0
Very good
7,960 reviews
Korean Air
8.4
Very good
1,139 reviews

Food

8.1

Boarding

8.5

Overall

8.4

Entertainment

8.2

Crew

8.7

Comfort

8.3

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
10,000 reviews
Korean Air
8.4
Very good
1,139 reviews

Food

8.1

Boarding

8.5

Overall

8.4

Entertainment

8.2

Crew

8.7

Comfort

8.3

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 popular is this Seattle to South Korea flight route?

    This flight path from Seattle/Tacoma Intl to South Korea was viewed by 200 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

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

    A quick flight from Seattle to South Korea can take about 11h 50m. Delta provides one of the quickest options available for as low as $831. 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?

    $422 is the cheapest one-way deal found within the past few days, from Asiana Airlines. You may also be able to find cheap deals on Delta and Alaska Airlines, with prices starting from $424 and $424, 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 - Busan Gimhae 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 Delta (64%), Korean Air (61%) and Thai Airways (40%).

  • 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 $1,492. The most popular route, (Seattle/Tacoma Intl - Incheon Intl), can usually be booked for $662.

  • 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, February is the cheapest month in which you can book a flight from Seattle to South Korea (average of $990). Flying from Seattle to South Korea in December is currently the most expensive (average of $1,633). 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 10 airlines flying from Seattle to South Korea

Discover the top 10 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 September 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$167Average$1,319FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$182Average$998FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$282Average$865FlexibilityNo cancel feeOn-time69%
Hawaiian AirlinesCheapest$645Average$1,315FlexibilityNo cancel feeOn-time85%
Air CanadaCheapest$749Average$910FlexibilityNo cancel feeOn-time67%
Asiana AirlinesCheapest$817Average$1,122FlexibilityNo cancel feeOn-time76%
Korean AirCheapest$864Average$1,224FlexibilityNo cancel feeOn-time81%
China AirlinesCheapest$886Average$1,070FlexibilityNo cancel feeOn-time70%
EVA AirCheapest$978Average$1,089FlexibilityNo cancel feeOn-time74%
Turkish AirlinesCheapest$1,007Average$1,247FlexibilityNo cancel feeOn-time77%

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