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$380+ 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
Aug 3 — Aug 101
Sun 8/3
Sun 8/10
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 July 29, 2025.

Round-trip from

$830
(Gotogate)

One-way from

$380
(Mytrip)

Popular in

June

Cheapest in

February

Average price

$1,334

Good round-trip deal

$739 or less

Good one-way deal

$379 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. 12% potential increase in price ($165 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($33 potential savings vs. average RT price).
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Average for round-trip flights in July 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 July 29, 2025.

This Kiwi.com deal was found by Cheapflights users on 7/28. 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 8/292:30 pmSEA - ICN
Nonstop11h 25mMultiple Airlines
Sun 9/76:20 pmICN - SEA
2 stops36h 06mMultiple Airlines
Deal found 7/28$830
This Asiana Airlines deal was found by Cheapflights users on 7/29. 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 Asiana Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/182:15 pmSEA - ICN
Nonstop11h 40mAsiana Airlines
Fri 9/266:20 pmICN - SEA
Nonstop10h 10mAsiana Airlines
Deal found 7/29$831
This CrystalTravel deal was found by Cheapflights users on 7/28. 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 CrystalTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/2912:55 pmSEA - ICN
Nonstop11h 35mKorean Air
Sat 9/67:20 pmICN - SEA
Nonstop10h 20mKorean Air
Deal found 7/28$833
This Air Canada deal was found by Cheapflights users on 7/27. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/307:15 pmSEA - ICN
1 stop28h 50mAir Canada
Mon 9/85:45 pmICN - SEA
1 stop20h 31mAir Canada
Deal found 7/27$835
This Alaska Airlines deal was found by Cheapflights users on 7/29. 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.
Wed 9/172:50 pmSEA - ICN
Nonstop11h 45mAlaska Airlines
Fri 10/318:35 pmICN - SEA
Nonstop10h 20mAlaska Airlines
Deal found 7/29$842
This Hawaiian Airlines deal was found by Cheapflights users on 7/29. 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 Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/201:45 pmSEA - ICN
Nonstop11h 50mHawaiian Airlines
Sat 11/298:35 pmICN - SEA
Nonstop10h 10mHawaiian Airlines
Deal found 7/29$863
This oojo deal was found by Cheapflights users on 7/29. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/281:10 amSEA - PUS
1 stop25h 50mChina Airlines
Tue 10/218:00 pmPUS - SEA
1 stop15h 20mChina Airlines
Deal found 7/29$867
This oojo deal was found by Cheapflights users on 7/26. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/131:10 amSEA - ICN
1 stop26h 25mChina Airlines
Tue 10/288:15 pmICN - SEA
1 stop14h 55mChina Airlines
Deal found 7/26$870
This oojo deal was found by Cheapflights users on 7/29. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/62:15 pmSEA - PUS
2 stops34h 45mAsiana Airlines
Sun 9/215:55 pmPUS - SEA
2 stops34h 35mAsiana Airlines
Deal found 7/29$913
This Gotogate deal was found by Cheapflights users on 7/27. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/2612:10 pmSEA - GMP
1 stop17h 10mJapan Airlines
Wed 12/177:40 pmGMP - SEA
1 stop31h 10mJapan Airlines
Deal found 7/27$913
This FlightHub deal was found by Cheapflights users on 7/29. 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.
Tue 8/197:10 amSEA - GMP
2 stops35h 50mChina Eastern
Tue 9/28:50 pmGMP - SEA
2 stops36h 01mChina Eastern
Deal found 7/29$918
This NaeilTour deal was found by Cheapflights users on 7/26. 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 NaeilTour is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/2510:05 amSEA - GMP
2 stops35h 50mMultiple Airlines
Sun 11/308:35 amGMP - SEA
2 stops27h 41mMultiple Airlines
Deal found 7/26$953

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 July 29, 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

Wed 8/20

2:30 pm-5:55 pm

Nonstop11h 25m

Incheon Intl

Sat 8/30

6:20 pm-12:45 pm

Nonstop10h 25m

$830

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Fri 9/19

12:50 pm-4:40 pm

Nonstop11h 50m

Incheon Intl

Fri 10/31

4:10 pm-10:00 am

Nonstop9h 50m

$832

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Fri 8/29

2:30 pm-5:55 pm

Nonstop11h 25m

Incheon Intl

Sun 9/7

6:20 pm-11:42 pm

1 stop21h 22m

$834

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Sat 8/30

7:15 pm-4:05 pm

1 stop28h 50m

Incheon Intl

Mon 9/8

5:45 pm-6:36 pm

1 stop16h 51m

$835

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Wed 9/17

2:50 pm-6:35 pm

Nonstop11h 45m

Incheon Intl

Fri 10/31

8:35 pm-2:55 pm

Nonstop10h 20m

$842

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Sun 9/21

7:20 am-5:20 pm

1 stop18h 00m

Incheon Intl

Sun 11/2

4:10 pm-10:00 am

Nonstop9h 50m

$846

SeattleBusan

SEA - PUS

SEAPUS

Seattle/Tacoma Intl

Sun 9/28

1:10 am-7:00 pm

1 stop25h 50m

Busan Gimhae

Tue 10/21

8:00 pm-7:20 pm

1 stop15h 20m

$867

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Mon 10/13

1:10 am-7:35 pm

1 stop26h 25m

Incheon Intl

Tue 10/28

8:15 pm-7:10 pm

1 stop14h 55m

$870

SeattleSeoul

SEA - GMP

SEAGMP

Seattle/Tacoma Intl

Wed 11/26

12:10 pm-10:20 pm

1 stop17h 10m

Seoul Gimpo Intl

Wed 12/17

7:40 pm-9:50 am

1 stop31h 10m

$913

SeattleBusan

SEA - PUS

SEAPUS

Seattle/Tacoma Intl

Sat 9/6

2:15 pm-5:00 pm

2 stops34h 45m

Busan Gimhae

Sun 9/21

5:55 pm-12:30 pm

2 stops34h 35m

$913

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/28

Showing 1-10 of 34 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 $998). Flying from Seattle to South Korea in December is currently the most expensive (average of $1,635). 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 July 29, 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 July 29, 2025.

The most flights from SEA to KR0 are scheduled on a Monday (9 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (5 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 July 29, 2025.
Read reviews from past customers who have flown EVA Air, Korean Air, and ANA 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.
EVA Air
8.4
Very good
1,221 reviews

Comfort

8.3

Boarding

8.4

Overall

8.4

Entertainment

8.0

Food

8.1

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

TPE - SEA

The flight and crew were exceptional as always when I fly with EVA.
EVA Air
8.4
Very good
1,221 reviews
EVA Air
8.4
Very good
1,221 reviews

Comfort

8.3

Boarding

8.4

Overall

8.4

Entertainment

8.0

Food

8.1

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

TPE - SEA

The flight and crew were exceptional as always when I fly with EVA.
Korean Air
8.4
Very good
1,121 reviews
EVA Air
8.4
Very good
1,221 reviews

Comfort

8.3

Boarding

8.4

Overall

8.4

Entertainment

8.0

Food

8.1

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

TPE - SEA

The flight and crew were exceptional as always when I fly with EVA.
ANA
8.4
Very good
922 reviews
EVA Air
8.4
Very good
1,221 reviews

Comfort

8.3

Boarding

8.4

Overall

8.4

Entertainment

8.0

Food

8.1

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

TPE - SEA

The flight and crew were exceptional as always when I fly with EVA.
Japan Airlines
8.3
Very good
1,535 reviews
EVA Air
8.4
Very good
1,221 reviews

Comfort

8.3

Boarding

8.4

Overall

8.4

Entertainment

8.0

Food

8.1

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

TPE - SEA

The flight and crew were exceptional as always when I fly with EVA.
China Airlines
8.3
Very good
754 reviews
EVA Air
8.4
Very good
1,221 reviews

Comfort

8.3

Boarding

8.4

Overall

8.4

Entertainment

8.0

Food

8.1

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

TPE - SEA

The flight and crew were exceptional as always when I fly with EVA.

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.

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

    $412 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 WestJet and Korean Air, with prices starting from $414 and $436, 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 (77%), Korean Air (71%) and Thai Airways (38%).

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

    The cheapest flight price from Seattle to South Korea is $350. On average you can expect to pay $1,971. The most popular route, (Seattle/Tacoma Intl - Incheon Intl), can usually be booked for $766.

  • 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 $998). Flying from Seattle to South Korea in December is currently the most expensive (average of $1,635). 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 July 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$167Average$1,335FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$182Average$1,099FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$282Average$865FlexibilityNo cancel feeOn-time69%
Hawaiian AirlinesCheapest$763Average$1,550FlexibilityNo cancel feeOn-time85%
Air CanadaCheapest$812Average$907FlexibilityNo cancel feeOn-time67%
China AirlinesCheapest$835Average$1,029FlexibilityNo cancel feeOn-time70%
Asiana AirlinesCheapest$901Average$1,153FlexibilityNo cancel feeOn-time76%
Korean AirCheapest$954Average$1,273FlexibilityNo cancel feeOn-time81%
EVA AirCheapest$978Average$1,090FlexibilityNo cancel feeOn-time74%
Turkish AirlinesCheapest$1,007Average$1,217FlexibilityNo cancel feeOn-time77%

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