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$425+ 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 3/3. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — ICN
Jan 14 — Jan 211
Wed 1/14
Wed 1/21
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 December 15, 2025.

This Trip.com deal was found by Cheapflights users on 12/13. 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.
Sat 12/2711:30 amSEA - ICN
Nonstop12h 00mMultiple Airlines
Sun 1/259:20 pmICN - SEA
2 stops30h 02mMultiple Airlines
Deal found 12/13$832
This Delta deal was found by Cheapflights users on 12/13. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/2711:30 amSEA - ICN
Nonstop12h 00mDelta
Sun 1/258:05 pmICN - SEA
Nonstop10h 15mDelta
Deal found 12/13$898
This Delta deal was found by Cheapflights users on 12/13. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/2610:15 pmSEA - ICN
1 stop26h 25mDelta
Sun 1/254:10 pmICN - SEA
Nonstop9h 50mDelta
Deal found 12/13$902
This Expedia deal was found by Cheapflights users on 12/14. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/271:40 pmSEA - ICN
Nonstop11h 55mHawaiian Airlines
Sun 1/258:35 pmICN - SEA
Nonstop10h 10mHawaiian Airlines
Deal found 12/14$1,002
This Hawaiian Airlines deal was found by Cheapflights users on 12/14. 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 Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/261:40 pmSEA - ICN
Nonstop11h 55mAlaska Airlines
Sun 1/258:35 pmICN - SEA
Nonstop10h 10mAlaska Airlines
Deal found 12/14$1,003
This United Airlines deal was found by Cheapflights users on 12/14. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/257:05 amSEA - ICN
1 stop16h 10mUnited Airlines
Sun 12/286:00 pmICN - SEA
1 stop23h 59mUnited Airlines
Deal found 12/14$1,056
This Gotogate deal was found by Cheapflights users on 12/15. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/273:40 pmSEA - GMP
1 stop33h 55mANA
Sun 1/257:50 pmGMP - SEA
1 stop34h 30mANA
Deal found 12/15$1,386
This Delta deal was found by Cheapflights users on 12/12. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/2311:00 amSEA - PUS
1 stop28h 10mDelta
Fri 12/2612:00 pmPUS - SEA
1 stop18h 20mDelta
Deal found 12/12$1,494
This Delta deal was found by Cheapflights users on 12/14. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/2511:30 amSEA - PUS
1 stop27h 40mDelta
Wed 12/317:00 amPUS - SEA
1 stop19h 00mDelta
Deal found 12/14$1,539
This Delta deal was found by Cheapflights users on 12/14. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/2411:00 amSEA - PUS
1 stop16h 45mDelta
Wed 12/317:55 amPUS - SEA
1 stop18h 05mDelta
Deal found 12/14$1,609
This Delta deal was found by Cheapflights users on 12/14. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/2311:00 amSEA - PUS
1 stop15h 35mDelta
Wed 12/317:00 amPUS - SEA
1 stop19h 00mDelta
Deal found 12/14$1,684
This oojo deal was found by Cheapflights users on 12/13. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/1412:10 pmSEA - GMP
1 stop16h 55mJapan Airlines
Sun 12/218:00 amGMP - SEA
1 stop18h 50mJapan Airlines
Deal found 12/13$1,703

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 December 15, 2025.

Most accurate provider

Mytrip
3 stars

Most trusted provider

Mytrip
3 stars

Round-trip from

$652
(United Airlines)

One-way from

$425
(Kiwi.com)

Popular in

June

Cheapest in

November

Average price

$1,092

Good round-trip deal

$337 or less

Good one-way deal

$358 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. 18% potential increase in price ($236 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($41 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
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 December 15, 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

Tue 2/3

5:50 am-4:00 pm

1 stop17h 10m

Incheon Intl

Sun 2/15

5:55 pm-7:16 pm

1 stop18h 21m

$761

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Mon 2/2

12:10 am-5:20 am

Nonstop12h 10m

Incheon Intl

Sun 2/15

9:00 pm-1:55 pm

Nonstop9h 55m

$852

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Fri 2/20

9:55 am-5:10 pm

1 stop14h 15m

Incheon Intl

Sun 3/1

5:55 pm-7:16 pm

1 stop18h 21m

$863

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Sat 3/7

5:50 am-4:15 pm

1 stop17h 25m

Incheon Intl

Sat 3/21

5:55 pm-3:01 pm

1 stop13h 06m

$863

SeattleJeju City

SEA - CJU

SEACJU

Seattle/Tacoma Intl

Mon 1/26

12:10 am-7:10 pm

2 stops26h 00m

Jeju City

Tue 2/3

8:00 pm-1:55 pm

2 stops34h 55m

$865

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Sun 1/4

12:10 am-5:20 am

Nonstop12h 10m

Incheon Intl

Mon 1/19

9:00 pm-1:55 pm

Nonstop9h 55m

$880

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Wed 3/4

11:00 am-3:55 pm

Nonstop11h 55m

Incheon Intl

Tue 6/30

4:40 pm-10:50 am

Nonstop10h 10m

$884

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Wed 2/4

1:40 pm-6:35 pm

Nonstop11h 55m

Incheon Intl

Sun 2/15

8:35 pm-1:45 pm

Nonstop10h 10m

$884

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Mon 2/23

11:25 am-4:30 pm

Nonstop12h 05m

Incheon Intl

Fri 3/6

8:05 pm-1:20 pm

Nonstop10h 15m

$884

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Thu 1/8

11:25 am-4:30 pm

Nonstop12h 05m

Incheon Intl

Wed 1/21

8:05 pm-1:20 pm

Nonstop10h 15m

$884

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/12

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, 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 $803). 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 December 15, 2025.

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 in the evening, which can drop the price by up to 30% versus a flight at noon.

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 December 16, 2024.

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 December 15, 2025.

The most flights from SEA to KR0 are scheduled on a Sunday (11 on average). You will have fewer flight options on Saturday, 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 185 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 12% 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 December 15, 2025.
Read reviews from past customers who have flown Korean Air, Asiana Airlines, and Alaska 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
1,186 reviews

Crew

8.7

Comfort

8.3

Entertainment

8.2

Overall

8.4

Boarding

8.5

Food

8.1

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
1,186 reviews
Korean Air
8.4
Very good
1,186 reviews

Crew

8.7

Comfort

8.3

Entertainment

8.2

Overall

8.4

Boarding

8.5

Food

8.1

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
493 reviews
Korean Air
8.4
Very good
1,186 reviews

Crew

8.7

Comfort

8.3

Entertainment

8.2

Overall

8.4

Boarding

8.5

Food

8.1

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
8.0
Very good
11,452 reviews
Korean Air
8.4
Very good
1,186 reviews

Crew

8.7

Comfort

8.3

Entertainment

8.2

Overall

8.4

Boarding

8.5

Food

8.1

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
8,008 reviews
Korean Air
8.4
Very good
1,186 reviews

Crew

8.7

Comfort

8.3

Entertainment

8.2

Overall

8.4

Boarding

8.5

Food

8.1

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
10,526 reviews
Korean Air
8.4
Very good
1,186 reviews

Crew

8.7

Comfort

8.3

Entertainment

8.2

Overall

8.4

Boarding

8.5

Food

8.1

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 12h 10m. Air Canada provides one of the quickest options available for as low as $852. 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 Asiana Airlines, with prices starting from $168 and $406, 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 (73%), Korean Air (67%) and Alaska Airlines (55%).

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

    The cheapest flight price from Seattle to South Korea is $188. On average you can expect to pay $1,242. The most popular route, (Seattle/Tacoma Intl - Incheon Intl), can usually be booked for $652.

  • 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 $803). 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.

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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 December 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$168Average$1,229FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$282Average$660FlexibilityNo cancel feeOn-time69%
Hawaiian AirlinesCheapest$282Average$881FlexibilityNo cancel feeOn-time85%
Alaska AirlinesCheapest$335Average$338FlexibilityNo cancel feeOn-time75%
Air CanadaCheapest$610Average$983FlexibilityNo cancel feeOn-time67%
Asiana AirlinesCheapest$798Average$1,056FlexibilityNo cancel feeOn-time76%
China AirlinesCheapest$835Average$1,023FlexibilityNo cancel feeOn-time70%
Korean AirCheapest$847Average$1,214FlexibilityNo cancel feeOn-time81%
EVA AirCheapest$978Average$1,089FlexibilityNo cancel feeOn-time74%
Turkish AirlinesCheapest$1,007Average$1,217FlexibilityNo cancel feeOn-time77%

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