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$354+ Cheap flights from South Korea to Seattle (SEA)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/23. Fares are subject to change and may not be available on all flights or dates of travel.
ICN — SEA
Nov 19 — Nov 261
Wed 11/19
Wed 11/26
1 adult, Economy
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Cheap flight deals from South Korea to Seattle

Keep the following information in mind while searching for South Korea to Seattle flight deals. Data was last updated October 20, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$354
(Trip.com)

Popular in

August

Cheapest in

September

Average price

$704

Good round-trip deal

$530 or less

Good one-way deal

$402 or less
Provider with most accurate pricing for Seoul (SEL)-Seattle/Tacoma Intl flight deals.
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Provider most trusted by Cheapflights users for Seoul (SEL)-Seattle/Tacoma Intl flights.
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From South Korea to Seattle/Tacoma Intl
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Highest demand for flights based on searches. 6% potential increase in price ($47 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($16 potential savings vs. average RT price).
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Average for round-trip flights in October 2025
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Price to beat on a round-trip flight from South Korea to Seattle/Tacoma Intl.
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Price to beat on a one-way flight from South Korea to Seattle/Tacoma Intl.
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Find flight deals from South Korea to Seattle

Cheapest flights from South Korea to Seattle
Explore the most affordable flight options available from South Korea to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 20, 2025.

This Trip.com deal was found by Cheapflights users on 10/20. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/238:35 pmICN - SEA
Nonstop10h 00mHawaiian Airlines
Sun 10/267:00 amSEA - ICN
1 stop20h 25mHawaiian Airlines
Deal found 10/20$354
This Trip.com deal was found by Cheapflights users on 10/20. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/79:25 pmICN - SEA
1 stop25h 10mHawaiian Airlines
Sat 11/157:00 amSEA - ICN
1 stop19h 25mHawaiian Airlines
Deal found 10/20$360
This Trip.com deal was found by Cheapflights users on 10/19. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/79:25 pmICN - SEA
1 stop18h 56mHawaiian Airlines
Fri 11/148:00 amSEA - ICN
1 stop18h 25mHawaiian Airlines
Deal found 10/19$376
This Trip.com deal was found by Cheapflights users on 10/19. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/258:35 pmICN - SEA
Nonstop10h 00mHawaiian Airlines
Wed 10/296:30 pmSEA - ICN
1 stop32h 55mHawaiian Airlines
Deal found 10/19$381
This iWofly deal was found by Cheapflights users on 10/18. 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 iWofly is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/268:35 pmICN - SEA
Nonstop10h 20mHawaiian Airlines
Thu 11/137:00 amSEA - ICN
1 stop19h 25mHawaiian Airlines
Deal found 10/18$422
This iWofly deal was found by Cheapflights users on 10/20. 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 iWofly is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/238:35 pmICN - SEA
Nonstop10h 00mHawaiian Airlines
Sat 10/257:44 amSEA - ICN
1 stop19h 41mHawaiian Airlines
Deal found 10/20$423
This Alaska Airlines deal was found by Cheapflights users on 10/18. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/268:35 pmICN - SEA
Nonstop10h 20mAlaska Airlines
Tue 11/188:00 amSEA - ICN
1 stop18h 25mAlaska Airlines
Deal found 10/18$427
This Gotogate deal was found by Cheapflights users on 10/19. 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.
Tue 10/214:30 pmPUS - SEA
1 stop34h 10mKorean Air
Tue 10/2812:00 pmSEA - PUS
1 stop35h 10mKorean Air
Deal found 10/19$671
This Gotogate deal was found by Cheapflights users on 10/20. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/1012:00 pmPUS - SEA
1 stop14h 00mKorean Air
Tue 12/3011:00 amSEA - PUS
1 stop16h 45mKorean Air
Deal found 10/20$704
This Gotogate deal was found by Cheapflights users on 10/19. 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.
Tue 11/187:55 amPUS - SEA
1 stop18h 05mKorean Air
Tue 11/2511:00 amSEA - PUS
1 stop16h 45mKorean Air
Deal found 10/19$706
This WhyPayMore deal was found by Cheapflights users on 10/20. 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 WhyPayMore is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/267:55 amPUS - SEA
1 stop18h 05mKorean Air
Mon 12/111:00 amSEA - PUS
1 stop15h 35mKorean Air
Deal found 10/20$714
This Trip.com deal was found by Cheapflights users on 10/19. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/1810:25 amPUS - SEA
1 stop20h 30mMultiple Airlines
Mon 11/2412:10 amSEA - PUS
1 stop15h 00mMultiple Airlines
Deal found 10/19$717

Cheapflights Fare Finder

 
Customize your flight search to find flights from South Korea to Seattle 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 October 20, 2025.
Use the filters below to find and compare flights from South Korea to Seattle that are best for you.

Fly from

South Korea

Fly to

Seattle

Route

Depart

Return

Price

IncheonSeattle

ICN - SEA

ICNSEA

Incheon Intl

Sat 12/27

9:00 pm-1:55 pm

Nonstop9h 55m

Seattle/Tacoma Intl

Sun 1/11

12:10 am-5:20 am

Nonstop12h 10m

$530

IncheonSeattle

ICN - SEA

ICNSEA

Incheon Intl

Sat 11/8

12:45 pm-10:30 pm

2 stops26h 45m

Seattle/Tacoma Intl

Sun 11/16

9:04 am-5:40 am

2 stops27h 36m

$532

IncheonSeattle

ICN - SEA

ICNSEA

Incheon Intl

Tue 11/25

6:00 pm-6:25 pm

1 stop17h 25m

Seattle/Tacoma Intl

Wed 12/3

5:30 am-5:40 am

1 stop31h 10m

$532

IncheonSeattle

ICN - SEA

ICNSEA

Incheon Intl

Fri 12/19

12:45 pm-12:59 am

1 stop29h 14m

Seattle/Tacoma Intl

Sat 1/3

7:12 pm-4:15 pm

1 stop28h 03m

$532

IncheonSeattle

ICN - SEA

ICNSEA

Incheon Intl

Wed 11/26

12:45 pm-1:38 pm

1 stop17h 53m

Seattle/Tacoma Intl

Wed 12/3

3:45 pm-5:40 am

2 stops20h 55m

$532

IncheonSeattle

ICN - SEA

ICNSEA

Incheon Intl

Sat 11/22

12:45 pm-4:15 pm

1 stop20h 30m

Seattle/Tacoma Intl

Tue 11/25

12:41 pm-5:40 am

2 stops23h 59m

$532

IncheonSeattle

ICN - SEA

ICNSEA

Incheon Intl

Sat 12/20

6:00 pm-12:59 am

1 stop23h 59m

Seattle/Tacoma Intl

Sat 2/28

5:20 pm-4:15 pm

1 stop29h 55m

$532

IncheonSeattle

ICN - SEA

ICNSEA

Incheon Intl

Thu 11/20

12:45 pm-9:13 pm

3 stops25h 28m

Seattle/Tacoma Intl

Wed 11/26

7:00 am-4:15 pm

1 stop16h 15m

$532

IncheonSeattle

ICN - SEA

ICNSEA

Incheon Intl

Tue 11/18

12:45 pm-12:18 pm

1 stop16h 33m

Seattle/Tacoma Intl

Tue 11/25

12:41 pm-5:40 am

2 stops23h 59m

$532

IncheonSeattle

ICN - SEA

ICNSEA

Incheon Intl

Thu 10/30

8:35 pm-2:55 pm

Nonstop10h 20m

Seattle/Tacoma Intl

Tue 11/18

8:00 am-7:25 pm

1 stop18h 25m

$558

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/18

Showing 1-10 of 55 results
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Best time to book a flight from South Korea to Seattle

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

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

Currently, November is the cheapest month in which you can book a flight from South Korea to Seattle (average of $341). Flying from South Korea to Seattle in August is currently the most expensive (average of $670). 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 KR to SEA?

Find hourly flight availability from South Korea to Seattle. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated October 20, 2025.

When flying from South Korea to Seattle, 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 35% versus a flight at noon.

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

Use this chart to determine the cheapest time to fly round-trip from South Korea to Seattle. Price data was last updated on October 27, 2024.

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

Weekly flight availability from South Korea to Seattle

Explore weekly flight availability from South Korea to Seattle. 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 October 20, 2025.

The most flights from KR0 to SEA are scheduled on a Monday (10 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (4 on average).

Reviews of airlines servicing Seattle

Get insights into the airlines that provide service to Seattle. 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 Seattle. Reviews last updated October 20, 2025.
Read reviews from past customers who have flown Korean Air, Asiana Airlines, and Alaska Airlines from South Korea to Seattle. 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
1,153 reviews

Overall

8.4

Boarding

8.5

Crew

8.7

Food

8.1

Entertainment

8.2

Comfort

8.3

Reviews

1 / 20
10.0
Excellent

Jacqueline,Aug 2025

ICN - SEA

Well, I was upset at first because I have a special diet and I need to order vegetarian and I couldn’t do it before the trip, but the stewardess were so nice and they gave me sandwiches that were plant-based which I loved!!
Korean Air
8.4
Very good
1,153 reviews
Korean Air
8.4
Very good
1,153 reviews

Overall

8.4

Boarding

8.5

Crew

8.7

Food

8.1

Entertainment

8.2

Comfort

8.3

Reviews

1 / 20
10.0
Excellent

Jacqueline,Aug 2025

ICN - SEA

Well, I was upset at first because I have a special diet and I need to order vegetarian and I couldn’t do it before the trip, but the stewardess were so nice and they gave me sandwiches that were plant-based which I loved!!
Asiana Airlines
8.2
Very good
485 reviews
Korean Air
8.4
Very good
1,153 reviews

Overall

8.4

Boarding

8.5

Crew

8.7

Food

8.1

Entertainment

8.2

Comfort

8.3

Reviews

1 / 20
10.0
Excellent

Jacqueline,Aug 2025

ICN - SEA

Well, I was upset at first because I have a special diet and I need to order vegetarian and I couldn’t do it before the trip, but the stewardess were so nice and they gave me sandwiches that were plant-based which I loved!!
Alaska Airlines
8.0
Very good
11,136 reviews
Korean Air
8.4
Very good
1,153 reviews

Overall

8.4

Boarding

8.5

Crew

8.7

Food

8.1

Entertainment

8.2

Comfort

8.3

Reviews

1 / 20
10.0
Excellent

Jacqueline,Aug 2025

ICN - SEA

Well, I was upset at first because I have a special diet and I need to order vegetarian and I couldn’t do it before the trip, but the stewardess were so nice and they gave me sandwiches that were plant-based which I loved!!
Delta
7.9
Good
7,978 reviews
Korean Air
8.4
Very good
1,153 reviews

Overall

8.4

Boarding

8.5

Crew

8.7

Food

8.1

Entertainment

8.2

Comfort

8.3

Reviews

1 / 20
10.0
Excellent

Jacqueline,Aug 2025

ICN - SEA

Well, I was upset at first because I have a special diet and I need to order vegetarian and I couldn’t do it before the trip, but the stewardess were so nice and they gave me sandwiches that were plant-based which I loved!!
Air Canada
7.1
Good
10,335 reviews
Korean Air
8.4
Very good
1,153 reviews

Overall

8.4

Boarding

8.5

Crew

8.7

Food

8.1

Entertainment

8.2

Comfort

8.3

Reviews

1 / 20
10.0
Excellent

Jacqueline,Aug 2025

ICN - SEA

Well, I was upset at first because I have a special diet and I need to order vegetarian and I couldn’t do it before the trip, but the stewardess were so nice and they gave me sandwiches that were plant-based which I loved!!

Related info for your journey

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

    Seattle/Tacoma Intl (SEA), located 11.4 mi from the city center, is the airport you fly into when you book flights from South Korea to Seattle.

  • How popular is this South Korea to Seattle flight route?

    Within the past month, 1 users have taken a look at flights from South Korea to Seattle/Tacoma Intl.

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

    Departing from South Korea to Seattle will take you 9h 55m. South Korea and Seattle are separated by a distance of 5200 mi. Both multi-stop and nonstop flights can be found to your destination and back.

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

    $366 is the cheapest one-way deal found within the past few days, from Air Canada. You may also be able to find cheap deals on Asiana Airlines and China Airlines, with prices starting from $404 and $468, respectively.

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

    The most popular flight routes from South Korea to Seattle are Incheon Intl - Seattle/Tacoma Intl, Seoul Gimpo Intl - Seattle/Tacoma Intl and Busan Gimhae - Seattle/Tacoma Intl.

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

    No one likes to see their flight delayed. When booking a flight from South Korea to Seattle consider choosing Alaska Airlines (55%), Hawaiian Airlines (55%) or Delta (53%) as they are the most reliable in getting you off to your destination on time.

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

    Looking for the cheapest flight from South Korea to Seattle? While on average our users pay $1,074, our data indicates the cheapest price to be $189. The most popular route (Incheon Intl - Seattle/Tacoma Intl), is priced around $361.

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

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

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

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

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

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

    Currently, November is the cheapest month in which you can book a flight from South Korea to Seattle (average of $341). Flying from South Korea to Seattle in August is currently the most expensive (average of $670). 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

Traveling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
SeaTac
Tukwila
Tacoma
Lakewood
Ocean Shores
Lynnwood
Edmonds
Leavenworth
Renton
Lacey
Olympia
Kent
Federal Way
Cle Elum
Marysville
Puyallup
Chehalis
Kirkland
Issaquah
Aberdeen

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for South Korea to Seattle

See prices for flight routes from nearby airports that may be better suited for you.
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Top 7 airlines flying from South Korea to Seattle

Discover the top 7 airlines that operate flights from South Korea to Seattle. 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 October 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
Asiana AirlinesCheapest$470Average$685FlexibilityNo cancel feeOn-time76%
Air CanadaCheapest$472Average$727FlexibilityNo cancel feeOn-time67%
Alaska AirlinesCheapest$476Average$572FlexibilityNo cancel feeOn-time75%
Korean AirCheapest$483Average$898FlexibilityNo cancel feeOn-time81%
Hawaiian AirlinesCheapest$485Average$866FlexibilityNo cancel feeOn-time85%
United AirlinesCheapest$516Average$646FlexibilityNo cancel feeOn-time69%
DeltaCheapest$623Average$744FlexibilityNo cancel feeOn-timeN/A

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