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$338+ 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 4/16. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — ICN
Apr 16 — Apr 231
Thu 4/16
Thu 4/23
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 March 17, 2026.

This KAYAK deal was found by Cheapflights users on 3/15. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/111:45 am
SEA
-
ICN
1 stop18h 40m
Cathay Pacific
Tue 10/68:00 am
ICN
-
SEA
1 stop18h 05m
Cathay Pacific
Deal found 3/15$687
This BusinessClass deal was found by Cheapflights users on 3/15. 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 BusinessClass is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/2911:45 am
SEA
-
ICN
1 stop18h 40m
Cathay Pacific
Tue 10/68:00 am
ICN
-
SEA
1 stop18h 05m
Cathay Pacific
Deal found 3/15$694
This Vliegwinkel deal was found by Cheapflights users on 3/16. 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 Vliegwinkel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/2011:45 am
SEA
-
ICN
1 stop20h 40m
Cathay Pacific
Tue 5/58:00 am
ICN
-
SEA
1 stop18h 05m
Cathay Pacific
Deal found 3/16$696
This Booking.com deal was found by Cheapflights users on 3/14. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/135:40 am
SEA
-
ICN
1 stop18h 25m
Air Canada
Wed 6/35:45 pm
ICN
-
SEA
1 stop16h 45m
Air Canada
Deal found 3/14$700
This flugladen.de deal was found by Cheapflights users on 3/14. 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 flugladen.de is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/2811:45 am
SEA
-
ICN
1 stop18h 40m
Cathay Pacific
Tue 5/58:00 am
ICN
-
SEA
1 stop18h 05m
Cathay Pacific
Deal found 3/14$701
This Kiwi.com deal was found by Cheapflights users on 3/12. 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 4/2111:45 am
SEA
-
ICN
1 stop34h 20m
Cathay Pacific
Tue 5/128:00 am
ICN
-
SEA
1 stop18h 05m
Cathay Pacific
Deal found 3/12$711
This Trip.com deal was found by Cheapflights users on 3/13. 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.
Tue 10/611:45 am
SEA
-
ICN
1 stop20h 40m
Cathay Pacific
Tue 10/277:35 pm
ICN
-
SEA
1 stop30h 35m
Cathay Pacific
Deal found 3/13$713
This Trip.com deal was found by Cheapflights users on 3/12. 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.
Tue 10/611:45 am
SEA
-
ICN
1 stop20h 40m
Cathay Pacific
Tue 11/173:00 pm
ICN
-
SEA
1 stop35h 10m
Cathay Pacific
Deal found 3/12$714
This Cathay Pacific deal was found by Cheapflights users on 3/16. 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 Cathay Pacific is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/111:45 am
SEA
-
ICN
1 stop20h 40m
Cathay Pacific
Tue 10/131:55 am
ICN
-
SEA
1 stop24h 10m
Cathay Pacific
Deal found 3/16$717
This Booking.com deal was found by Cheapflights users on 3/16. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/228:00 pm
SEA
-
ICN
1 stop28h 05m
Air Canada
Wed 5/205:45 pm
ICN
-
SEA
1 stop20h 55m
Air Canada
Deal found 3/16$718
This ScholarTrip deal was found by Cheapflights users on 3/13. 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 ScholarTrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/112:25 pm
SEA
-
ICN
1 stop18h 00m
Cathay Pacific
Tue 10/273:00 pm
ICN
-
SEA
1 stop35h 10m
Cathay Pacific
Deal found 3/13$720
This FlightHub deal was found by Cheapflights users on 3/14. 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 11/1512:10 am
SEA
-
PUS
1 stop17h 40m
China Airlines
Mon 11/307:50 pm
PUS
-
SEA
1 stop15h 20m
China Airlines
Deal found 3/14$845

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 March 17, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$687
(KAYAK)

One-way from

$338
(Mytrip)

Popular in

July

Cheapest in

November

Average price

$887

Good round-trip deal

$667 or less

Good one-way deal

$368 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 ($134 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 March 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 March 17, 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

Thu 4/23

7:59 pm-3:20 pm

1 stop27h 21m

Incheon Intl

Fri 5/15

7:00 pm-1:11 pm

Nonstop10h 11m

$806

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Sun 4/19

1:00 pm-4:50 pm

Nonstop11h 50m

Incheon Intl

Thu 4/23

7:00 pm-1:07 pm

Nonstop10h 07m

$899

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Fri 5/1

7:00 am-5:20 pm

1 stop18h 20m

Incheon Intl

Sun 5/17

4:40 pm-10:40 am

Nonstop10h 00m

$903

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Thu 4/23

5:45 pm-4:20 am

1 stop18h 35m

Incheon Intl

Mon 4/27

4:50 pm-11:27 pm

1 stop22h 37m

$913

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Fri 5/1

7:05 pm-3:00 pm

2 stops27h 55m

Incheon Intl

Mon 5/18

11:30 am-10:43 am

1 stop15h 13m

$918

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Thu 5/7

12:50 pm-4:40 pm

Nonstop11h 50m

Incheon Intl

Tue 5/26

4:00 pm-4:01 pm

1 stop16h 01m

$937
Quickest round-trip

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Wed 5/13

12:50 pm-4:40 pm

Nonstop11h 50m

Incheon Intl

Mon 5/25

4:40 pm-10:40 am

Nonstop10h 00m

$955

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Wed 5/13

12:50 pm-4:40 pm

Nonstop11h 50m

Incheon Intl

Sun 5/24

4:40 pm-10:40 am

Nonstop10h 00m

$955

SeattleBusan

SEA - PUS

SEAPUS

Seattle/Tacoma Intl

Wed 4/29

12:50 pm-4:35 pm

1 stop35h 45m

Busan Gimhae

Wed 5/6

10:40 am-10:40 am

1 stop16h 00m

$959

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Wed 5/6

11:39 am-4:20 am

1 stop24h 41m

Incheon Intl

Mon 5/25

11:30 am-8:00 am

2 stops36h 30m

$960

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/12

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

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

Currently, April is the cheapest month in which you can book a flight from Seattle to South Korea (average of $335). Flying from Seattle to South Korea in December is currently the most expensive (average of $748). 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 March 17, 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 at noon, which can drop the price by up to 45% versus a flight in the afternoon.

What is the cheapest day to fly from Seattle to South Korea?

Use this chart to determine the cheapest time to fly round-trip from Seattle to South Korea. Price data was last updated on March 14, 2026.

Travelers seeking maximum savings on their Seattle to South Korea flight should consider departing on Tuesday at noon when fares are most often at their lowest. Sunday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

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 March 17, 2026.

The most flights from SEA to KR0 are scheduled on a Monday (9 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (4 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 179 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?

Saturday 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 17% 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 March 17, 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
1,202 reviews

Boarding

8.5

Overall

8.4

Food

8.1

Comfort

8.3

Entertainment

8.2

Crew

8.7

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
1,202 reviews
Korean Air
8.4
Very good
1,202 reviews

Boarding

8.5

Overall

8.4

Food

8.1

Comfort

8.3

Entertainment

8.2

Crew

8.7

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
507 reviews
Korean Air
8.4
Very good
1,202 reviews

Boarding

8.5

Overall

8.4

Food

8.1

Comfort

8.3

Entertainment

8.2

Crew

8.7

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
12,059 reviews
Korean Air
8.4
Very good
1,202 reviews

Boarding

8.5

Overall

8.4

Food

8.1

Comfort

8.3

Entertainment

8.2

Crew

8.7

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
8,288 reviews
Korean Air
8.4
Very good
1,202 reviews

Boarding

8.5

Overall

8.4

Food

8.1

Comfort

8.3

Entertainment

8.2

Crew

8.7

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
10,811 reviews
Korean Air
8.4
Very good
1,202 reviews

Boarding

8.5

Overall

8.4

Food

8.1

Comfort

8.3

Entertainment

8.2

Crew

8.7

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 50m. Korean Air provides one of the quickest options available for as low as $899. 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?

    $160 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 Korean Air, with prices starting from $168 and $319, 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 (98%), Asiana Airlines (98%) and United Airlines (98%).

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

    The cheapest flight price from Seattle to South Korea is $293. On average you can expect to pay $1,247. The most popular route, (Seattle/Tacoma Intl - Incheon Intl), can usually be booked for $687.

  • 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, April is the cheapest month in which you can book a flight from Seattle to South Korea (average of $335). Flying from Seattle to South Korea in December is currently the most expensive (average of $748). 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

Browse thousands of different options on Cheapflights for your next trip

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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 March 17, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$212Average$979FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$282Average$660FlexibilityNo cancel feeOn-time69%
Hawaiian AirlinesCheapest$282Average$840FlexibilityNo cancel feeOn-time85%
Alaska AirlinesCheapest$335Average$338FlexibilityNo cancel feeOn-time75%
Air CanadaCheapest$524Average$859FlexibilityNo cancel feeOn-time67%
Asiana AirlinesCheapest$674Average$914FlexibilityNo cancel feeOn-time76%
Alaska AirlinesCheapest$799Average$885FlexibilityNo cancel feeOn-timeN/A
Korean AirCheapest$843Average$1,156FlexibilityNo cancel feeOn-time81%
China AirlinesCheapest$896Average$1,206FlexibilityNo cancel feeOn-time70%
EVA AirCheapest$978Average$1,077FlexibilityNo cancel feeOn-time74%

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