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$353+ 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 11/13. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — ICN
nov. 28 — dic. 51
vie. 11/28
vie. 12/5
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 octubre 29, 2025.

Most accurate provider

Mytrip
3 stars

Most trusted provider

Mytrip
3 stars

Round-trip from

$734
(Kiwi.com)

One-way from

$353
(Mytrip)

Popular in

June

Cheapest in

August

Average price

$980

Good round-trip deal

$673 or less

Good one-way deal

$373 or less
Provider with most accurate pricing for Seattle/Tacoma Intl-Seoul (SEL) flight deals.
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Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Seoul (SEL) flights.
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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. 17% potential increase in price ($230 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($38 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 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 octubre 29, 2025.

This Kiwi.com deal was found by Cheapflights users on 10/28. 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.
jue. 11/1310:05 amSEA - ICN
2 stops41h 55mMultiple Airlines
mar. 11/259:20 pmICN - SEA
1 stop14h 26mMultiple Airlines
Deal found 10/28$734
This Booking.com deal was found by Cheapflights users on 10/28. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 11/510:05 amSEA - ICN
1 stop14h 05mAir Canada
lun. 11/106:55 pmICN - SEA
1 stop20h 11mAir Canada
Deal found 10/28$735
This FlightHub deal was found by Cheapflights users on 10/28. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 11/110:05 amSEA - ICN
1 stop14h 05mAir Canada
sáb. 11/226:55 pmICN - SEA
1 stop12h 36mAir Canada
Deal found 10/28$736
This Kiwi.com deal was found by Cheapflights users on 10/29. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 11/1310:05 amSEA - ICN
2 stops41h 55mMultiple Airlines
sáb. 12/139:20 pmICN - SEA
1 stop16h 18mMultiple Airlines
Deal found 10/29$737
This Kiwi.com deal was found by Cheapflights users on 10/27. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 11/1711:10 pmSEA - ICN
1 stop29h 25mMultiple Airlines
mar. 11/259:20 pmICN - SEA
1 stop14h 26mMultiple Airlines
Deal found 10/27$739
This Kiwi.com deal was found by Cheapflights users on 10/28. 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.
jue. 11/1310:05 amSEA - ICN
2 stops41h 55mMultiple Airlines
jue. 11/209:20 pmICN - SEA
1 stop14h 27mMultiple Airlines
Deal found 10/28$742
This Kiwi.com deal was found by Cheapflights users on 10/28. 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.
jue. 11/1310:05 amSEA - ICN
2 stops41h 55mMultiple Airlines
sáb. 11/299:20 pmICN - SEA
1 stop16h 18mMultiple Airlines
Deal found 10/28$743
This Kiwi.com deal was found by Cheapflights users on 10/28. 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.
jue. 11/1310:05 amSEA - ICN
2 stops41h 55mMultiple Airlines
dom. 11/239:20 pmICN - SEA
1 stop14h 26mMultiple Airlines
Deal found 10/28$744
This Kiwi.com deal was found by Cheapflights users on 10/28. 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.
mar. 11/1811:29 amSEA - ICN
1 stop17h 06mMultiple Airlines
mar. 11/259:20 pmICN - SEA
1 stop14h 26mMultiple Airlines
Deal found 10/28$746
This Kiwi.com deal was found by Cheapflights users on 10/28. 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.
jue. 12/410:05 amSEA - ICN
2 stops41h 55mHainan Airlines
mié. 12/1010:10 pmICN - SEA
2 stops26h 55mHainan Airlines
Deal found 10/28$748
This Booking.com deal was found by Cheapflights users on 10/27. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 11/75:50 amSEA - ICN
1 stop18h 20mAir Canada
lun. 11/106:55 pmICN - SEA
1 stop20h 11mAir Canada
Deal found 10/27$749
This Kiwi.com deal was found by Cheapflights users on 10/27. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 11/205:45 pmSEA - ICN
2 stops25h 35mMultiple Airlines
mar. 11/259:20 pmICN - SEA
1 stop14h 26mMultiple Airlines
Deal found 10/27$751

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 octubre 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

mié. 11/12

11:15 am-4:30 pm

Nonstop12h 15m

Incheon Intl

dom. 11/16

8:05 pm-1:20 pm

Nonstop10h 15m

$829

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

mié. 11/12

1:45 pm-6:35 pm

Nonstop11h 50m

Incheon Intl

sáb. 11/15

8:35 pm-1:55 pm

Nonstop10h 20m

$829

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

vie. 11/14

1:45 pm-6:35 pm

Nonstop11h 50m

Incheon Intl

dom. 11/16

8:35 pm-1:55 pm

Nonstop10h 20m

$829

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

mar. 11/11

3:37 pm-5:40 am

1 stop21h 03m

Incheon Intl

lun. 12/22

6:00 pm-12:59 am

1 stop23h 59m

$844

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

mié. 11/12

3:48 pm-5:40 am

2 stops20h 52m

Incheon Intl

jue. 11/20

12:45 pm-12:18 pm

1 stop16h 33m

$848

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

mar. 11/11

11:00 am-3:55 pm

Nonstop11h 55m

Incheon Intl

sáb. 11/22

4:10 pm-9:00 am

Nonstop9h 50m

$849

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

jue. 11/13

1:45 pm-6:35 pm

Nonstop11h 50m

Incheon Intl

vie. 11/21

8:35 pm-1:45 pm

Nonstop10h 10m

$849

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

mar. 11/18

3:48 pm-5:40 am

2 stops20h 52m

Incheon Intl

jue. 11/27

12:45 pm-11:39 am

2 stops39h 54m

$860

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

lun. 11/17

5:30 am-4:15 pm

1 stop17h 45m

Incheon Intl

jue. 11/27

12:45 pm-11:39 am

2 stops39h 54m

$860

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

vie. 11/28

11:00 am-3:55 pm

Nonstop11h 55m

Incheon Intl

dom. 3/29

4:40 pm-10:40 am

Nonstop10h 00m

$869

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/29

Showing 1-10 of 57 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, August is the cheapest month in which you can book a flight from Seattle to South Korea (average of $207). Flying from Seattle to South Korea in July is currently the most expensive (average of $896). 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 octubre 29, 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 31% 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 octubre 29, 2025.

The most flights from SEA to KR0 are scheduled on a Wednesday (10 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (4 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 octubre 29, 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
1,155 reviews

Crew

8.7

Overall

8.4

Food

8.1

Comfort

8.3

Boarding

8.5

Entertainment

8.2

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
1,155 reviews
Korean Air
8.4
Very good
1,155 reviews

Crew

8.7

Overall

8.4

Food

8.1

Comfort

8.3

Boarding

8.5

Entertainment

8.2

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
483 reviews
Korean Air
8.4
Very good
1,155 reviews

Crew

8.7

Overall

8.4

Food

8.1

Comfort

8.3

Boarding

8.5

Entertainment

8.2

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
11,206 reviews
Korean Air
8.4
Very good
1,155 reviews

Crew

8.7

Overall

8.4

Food

8.1

Comfort

8.3

Boarding

8.5

Entertainment

8.2

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
7,994 reviews
Korean Air
8.4
Very good
1,155 reviews

Crew

8.7

Overall

8.4

Food

8.1

Comfort

8.3

Boarding

8.5

Entertainment

8.2

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
10,371 reviews
Korean Air
8.4
Very good
1,155 reviews

Crew

8.7

Overall

8.4

Food

8.1

Comfort

8.3

Boarding

8.5

Entertainment

8.2

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 11h 50m. Delta provides one of the quickest options available for as low as $829. 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 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 (69%), Korean Air (56%) and Alaska Airlines (35%).

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

    The cheapest flight price from Seattle to South Korea is $348. On average you can expect to pay $1,461. The most popular route, (Seattle/Tacoma Intl - Incheon Intl), can usually be booked for $625.

  • 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, August is the cheapest month in which you can book a flight from Seattle to South Korea (average of $207). Flying from Seattle to South Korea in July is currently the most expensive (average of $896). 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 octubre 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$167Average$1,266FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$190Average$972FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$282Average$660FlexibilityNo cancel feeOn-time69%
Hawaiian AirlinesCheapest$282Average$884FlexibilityNo cancel feeOn-time85%
Air CanadaCheapest$710Average$969FlexibilityNo cancel feeOn-time67%
Asiana AirlinesCheapest$802Average$1,079FlexibilityNo cancel feeOn-time76%
China AirlinesCheapest$835Average$1,020FlexibilityNo cancel feeOn-time70%
Korean AirCheapest$850Average$1,215FlexibilityNo cancel feeOn-time81%
EVA AirCheapest$978Average$1,089FlexibilityNo cancel feeOn-time74%
Turkish AirlinesCheapest$1,007Average$1,217FlexibilityNo cancel feeOn-time77%

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