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$362+ 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 8/1. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — ICN
Jul 20 — Jul 271
Mon 7/20
Mon 7/27
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 June 20, 2026.

This Gotogate deal was found by Cheapflights users on 6/19. 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.
Fri 8/217:35 pm
SEA
-
ICN
1 stop31h 10m
WestJet
Sat 9/198:45 pm
ICN
-
SEA
1 stop28h 55m
WestJet
Deal found 6/19$879
This WestJet deal was found by Cheapflights users on 6/19. 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 WestJet is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/297:35 pm
SEA
-
ICN
1 stop31h 10m
WestJet
Sun 9/138:45 pm
ICN
-
SEA
1 stop28h 55m
WestJet
Deal found 6/19$882
This WestJet deal was found by Cheapflights users on 6/18. 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 WestJet is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/3010:30 am
SEA
-
ICN
1 stop16h 15m
WestJet
Mon 9/148:45 pm
ICN
-
SEA
1 stop28h 55m
WestJet
Deal found 6/18$883
This KAYAK deal was found by Cheapflights users on 6/19. 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.
Wed 8/2610:30 am
SEA
-
ICN
1 stop16h 15m
WestJet
Tue 9/158:45 pm
ICN
-
SEA
2 stops26h 50m
WestJet
Deal found 6/19$884
This WestJet deal was found by Cheapflights users on 6/19. 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 WestJet is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/297:35 pm
SEA
-
ICN
1 stop31h 10m
WestJet
Tue 9/158:45 pm
ICN
-
SEA
2 stops26h 50m
WestJet
Deal found 6/19$886
This WestJet deal was found by Cheapflights users on 6/18. 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 WestJet is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/297:00 am
SEA
-
ICN
1 stop19h 45m
WestJet
Mon 9/148:45 pm
ICN
-
SEA
2 stops26h 50m
WestJet
Deal found 6/18$887
This FlightHub deal was found by Cheapflights users on 6/18. 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 8/307:00 am
SEA
-
ICN
1 stop19h 45m
WestJet
Sat 9/128:45 pm
ICN
-
SEA
1 stop28h 55m
WestJet
Deal found 6/18$891
This KAYAK deal was found by Cheapflights users on 6/16. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/1011:55 am
SEA
-
ICN
2 stops40h 30m
Hainan Airlines
Wed 11/119:40 pm
ICN
-
SEA
2 stops27h 25m
Hainan Airlines
Deal found 6/16$900
This WestJet deal was found by Cheapflights users on 6/16. 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 WestJet is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/3110:30 am
SEA
-
ICN
1 stop16h 15m
WestJet
Sun 9/138:45 pm
ICN
-
SEA
2 stops38h 10m
WestJet
Deal found 6/16$909
This Gotogate deal was found by Cheapflights users on 6/19. 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.
Wed 11/43:10 pm
SEA
-
ICN
1 stop33h 35m
Multiple Airlines
Sun 1/178:30 pm
ICN
-
SEA
1 stop39h 05m
Multiple Airlines
Deal found 6/19$912
This oojo deal was found by Cheapflights users on 6/20. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/311:10 am
SEA
-
PUS
1 stop25h 40m
China Airlines
Sun 11/227:50 pm
PUS
-
SEA
1 stop15h 20m
China Airlines
Deal found 6/20$1,064
This oojo deal was found by Cheapflights users on 6/20. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/181:15 am
SEA
-
PUS
1 stop16h 15m
China Airlines
Thu 11/511:50 am
PUS
-
SEA
1 stop23h 20m
China Airlines
Deal found 6/20$1,065

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 June 20, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$879
(Gotogate)

One-way from

$362
(oojo)

Popular in

December

Cheapest in

November

Average price

$1,120

Good round-trip deal

$885 or less

Good one-way deal

$564 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. 1% potential increase in price ($16 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($21 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 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 June 20, 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

Tue 10/13

11:45 am-7:05 pm

1 stop39h 20m

Incheon Intl

Fri 11/13

1:45 pm-9:10 am

1 stop36h 25m

$1,089

SeattleBusan

SEA - PUS

SEAPUS

Seattle/Tacoma Intl

Fri 7/17

12:10 am-7:45 am

1 stop15h 35m

Busan Gimhae

Fri 7/24

7:00 am-3:45 pm

1 stop24h 45m

$1,116

SeattleBusan

SEA - PUS

SEAPUS

Seattle/Tacoma Intl

Tue 9/1

1:55 am-11:15 am

1 stop17h 20m

Busan Gimhae

Tue 9/15

10:30 am-7:45 pm

1 stop25h 15m

$1,118

SeattleBusan

SEA - PUS

SEAPUS

Seattle/Tacoma Intl

Sun 8/30

1:55 am-9:30 am

1 stop15h 35m

Busan Gimhae

Mon 9/14

8:00 pm-7:45 pm

1 stop15h 45m

$1,118

SeattleBusan

SEA - PUS

SEAPUS

Seattle/Tacoma Intl

Sat 8/29

1:55 am-11:15 am

1 stop17h 20m

Busan Gimhae

Thu 9/17

12:15 pm-7:15 pm

1 stop23h 00m

$1,118

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Wed 7/22

1:05 pm-4:50 pm

Nonstop11h 45m

Incheon Intl

Fri 7/31

7:00 pm-1:41 pm

Nonstop10h 41m

$1,131

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Sat 7/18

5:00 am-3:00 pm

1 stop18h 00m

Incheon Intl

Wed 7/29

11:30 am-7:03 pm

2 stops23h 33m

$1,158

SeattleBusan

SEA - PUS

SEAPUS

Seattle/Tacoma Intl

Sat 8/15

2:10 am-11:35 am

1 stop17h 25m

Busan Gimhae

Wed 9/2

7:10 pm-7:40 pm

1 stop16h 30m

$1,167

SeattleBusan

SEA - PUS

SEAPUS

Seattle/Tacoma Intl

Sun 8/16

7:20 pm-7:50 pm

2 stops32h 30m

Busan Gimhae

Wed 9/2

7:45 am-7:40 pm

2 stops27h 55m

$1,174

SeattleBusan

SEA - PUS

SEAPUS

Seattle/Tacoma Intl

Sat 8/29

1:55 am-7:00 pm

1 stop25h 05m

Busan Gimhae

Sun 9/13

12:15 pm-7:45 pm

1 stop23h 30m

$1,191

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/16

Showing 1-10 of 55 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, 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 May is currently the most expensive (average of $6,143). 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 June 20, 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 30% 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 June 20, 2026.

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

How often are flights from Seattle to South Korea delayed?

About 30% of weekly flights between Seattle and South Korea have experienced delays in the past year, with the average delay time being 169 minutes.

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

Historically, flights departing in the early afternoon 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 Wednesday 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.

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.

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 June 20, 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
1,218 reviews

Entertainment

8.2

Boarding

8.5

Comfort

8.3

Crew

8.7

Food

8.1

Overall

8.4

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
1,218 reviews
Korean Air
8.4
Very good
1,218 reviews

Entertainment

8.2

Boarding

8.5

Comfort

8.3

Crew

8.7

Food

8.1

Overall

8.4

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
545 reviews
Korean Air
8.4
Very good
1,218 reviews

Entertainment

8.2

Boarding

8.5

Comfort

8.3

Crew

8.7

Food

8.1

Overall

8.4

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
12,552 reviews
Korean Air
8.4
Very good
1,218 reviews

Entertainment

8.2

Boarding

8.5

Comfort

8.3

Crew

8.7

Food

8.1

Overall

8.4

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
7.8
Good
8,422 reviews
Korean Air
8.4
Very good
1,218 reviews

Entertainment

8.2

Boarding

8.5

Comfort

8.3

Crew

8.7

Food

8.1

Overall

8.4

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
11,229 reviews
Korean Air
8.4
Very good
1,218 reviews

Entertainment

8.2

Boarding

8.5

Comfort

8.3

Crew

8.7

Food

8.1

Overall

8.4

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. Cathay Pacific provides one of the quickest options available for as low as $1,131. 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 Delta, with prices starting from $168 and $324, 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 (100%), Hawaiian Airlines (100%) and United Airlines (100%).

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

    The cheapest flight price from Seattle to South Korea is $412. On average you can expect to pay $1,532. The most popular route, (Seattle/Tacoma Intl - Incheon Intl), can usually be booked for $863.

  • 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 May is currently the most expensive (average of $6,143). 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 7 airlines flying from Seattle to South Korea

Discover the top 7 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 June 20, 2026.
AirlineCheapestAverageFlexibilityOn-time
Hawaiian AirlinesCheapest$160Average$829FlexibilityNo cancel feeOn-time85%
Alaska AirlinesCheapest$335Average$338FlexibilityNo cancel feeOn-time75%
Air CanadaCheapest$524Average$795FlexibilityNo cancel feeOn-time67%
Asiana AirlinesCheapest$798Average$883FlexibilityNo cancel feeOn-time76%
DeltaCheapest$838Average$996FlexibilityNo cancel feeOn-timeN/A
Korean AirCheapest$843Average$1,000FlexibilityNo cancel feeOn-time81%
EVA AirCheapest$1,019Average$1,102FlexibilityNo cancel feeOn-time74%

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