HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Seoul

$339+ Cheap flights from Seattle (SEA) to Seoul (SEL)

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 3/19. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SEL
Jan 27 — Feb 31
Tue 1/27
Tue 2/3
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Seattle to Seoul with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheapflights Tip: The best prices from Seattle/Tacoma Intl to Seoul are usually found in November or February, booked 4 days in advance, depart on a Wednesday or Monday and return on a Thursday

Cheap flight deals from Seattle to Seoul

Cheapest flights from Seattle to Seoul
Explore the most affordable flight options available from Seattle to Seoul. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 28, 2025.

This Trip.com deal was found by Cheapflights users on 12/26. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/2912:10 amSEA - ICN
Nonstop12h 10mMultiple Airlines
Sun 2/19:20 pmICN - SEA
2 stops30h 05mMultiple Airlines
Deal found 12/26$814
This Kiwi.com deal was found by Cheapflights users on 12/27. 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.
Tue 12/309:30 pmSEA - ICN
2 stops48h 25mMultiple Airlines
Fri 1/236:55 pmICN - SEA
1 stop20h 03mMultiple Airlines
Deal found 12/27$842
This Delta deal was found by Cheapflights users on 12/27. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/3011:30 amSEA - ICN
Nonstop12h 00mDelta
Tue 1/208:05 pmICN - SEA
Nonstop10h 15mDelta
Deal found 12/27$884
This Korean Air deal was found by Cheapflights users on 12/27. 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 Korean Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/307:13 amSEA - ICN
1 stop17h 27mKorean Air
Wed 1/218:05 pmICN - SEA
Nonstop10h 15mKorean Air
Deal found 12/27$891
This oojo deal was found by Cheapflights users on 12/26. 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.
Tue 12/3012:10 pmSEA - GMP
1 stop16h 55mJapan Airlines
Sun 2/17:40 pmGMP - SEA
2 stops38h 07mJapan Airlines
Deal found 12/26$900
This Korean Air deal was found by Cheapflights users on 12/27. 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 Korean Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/307:13 amSEA - ICN
1 stop17h 27mKorean Air
Fri 1/234:00 pmICN - SEA
1 stop17h 54mKorean Air
Deal found 12/27$902
This oojo deal was found by Cheapflights users on 12/26. 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 12/2912:10 amSEA - ICN
Nonstop12h 10mAsiana Airlines
Sun 2/19:00 pmICN - SEA
Nonstop9h 55mAsiana Airlines
Deal found 12/26$912
This Kiwi.com deal was found by Cheapflights users on 12/27. 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.
Tue 12/309:30 pmSEA - ICN
2 stops28h 55mMultiple Airlines
Tue 1/209:20 pmICN - SEA
1 stop14h 29mMultiple Airlines
Deal found 12/27$914
This United Airlines deal was found by Cheapflights users on 12/27. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/307:05 amSEA - ICN
1 stop16h 10mUnited Airlines
Tue 1/206:00 pmICN - SEA
1 stop14h 44mUnited Airlines
Deal found 12/27$968
This oojo deal was found by Cheapflights users on 12/26. 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.
Tue 12/307:23 pmSEA - GMP
2 stops33h 42mMultiple Airlines
Sun 2/17:40 pmGMP - SEA
2 stops38h 07mMultiple Airlines
Deal found 12/26$1,225
This FlightHub deal was found by Cheapflights users on 12/26. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/303:40 pmSEA - GMP
1 stop26h 40mANA
Sun 2/112:25 pmGMP - SEA
1 stop17h 55mANA
Deal found 12/26$1,329
This Mytrip deal was found by Cheapflights users on 12/27. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/287:12 pmSEA - GMP
2 stops34h 18mANA
Sun 1/117:50 pmGMP - SEA
1 stop34h 30mANA
Deal found 12/27$1,997

Find flight deals from Seattle to Seoul

Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Seoul (SEL). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated December 28, 2025.

Most accurate provider

Mytrip
3 stars

Most trusted provider

Mytrip
3 stars

Round-trip from

$698
(Kiwi.com)

One-way from

$339
(SmartFares)

Popular in

June

Cheapest in

November

Average price

$1,163

Good round-trip deal

$337 or less

Good one-way deal

$366 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 Seoul (SEL)
Search Deals
One-way flight from Seattle/Tacoma Intl to Seoul (SEL)
Search Deals
Highest demand for flights based on searches. 17% potential increase in price ($218 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($36 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 Seoul (SEL).
Search Deals
Price to beat on a one-way flight from Seattle/Tacoma Intl to Seoul (SEL).
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Seattle to Seoul 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 28, 2025.
Use the filters below to find and compare flights from Seattle to Seoul that are best for you.

Fly from

Seattle

Fly to

Seoul

Route

Depart

Return

Price

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Wed 2/25

11:25 am-4:30 pm

Nonstop12h 05m

Incheon Intl

Sat 2/28

8:05 pm-1:20 pm

Nonstop10h 15m

$884

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Sun 1/25

1:40 pm-6:35 pm

Nonstop11h 55m

Incheon Intl

Sat 2/28

8:35 pm-1:45 pm

Nonstop10h 10m

$884

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Tue 4/14

1:00 pm-4:50 pm

Nonstop11h 50m

Incheon Intl

Wed 4/22

7:00 pm-1:07 pm

Nonstop10h 07m

$884

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Fri 3/6

11:30 am-4:30 pm

Nonstop12h 00m

Incheon Intl

Mon 3/9

8:05 pm-2:20 pm

Nonstop10h 15m

$884

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Sat 2/14

11:25 am-4:30 pm

Nonstop12h 05m

Incheon Intl

Sat 2/21

8:05 pm-1:20 pm

Nonstop10h 15m

$884

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Fri 5/1

12:50 pm-4:40 pm

Nonstop11h 50m

Incheon Intl

Fri 5/15

4:40 pm-10:40 am

Nonstop10h 00m

$884

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Thu 1/15

11:25 am-4:30 pm

Nonstop12h 05m

Incheon Intl

Thu 2/26

8:05 pm-1:20 pm

Nonstop10h 15m

$884

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Wed 1/21

11:00 am-3:55 pm

Nonstop11h 55m

Incheon Intl

Mon 2/2

4:10 pm-9:00 am

Nonstop9h 50m

$884

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Fri 2/13

11:25 am-4:30 pm

Nonstop12h 05m

Incheon Intl

Sun 2/22

8:05 pm-1:20 pm

Nonstop10h 15m

$884

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Mon 2/16

11:00 am-3:55 pm

Nonstop11h 55m

Incheon Intl

Sat 2/28

4:10 pm-9:00 am

Nonstop9h 50m

$884

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/28

Showing 1-10 of 43 results
1
2
3
...
5

Compare providers for flights from Seattle to Seoul

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Seattle to Seoul in December.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
AranGrantPrice Accuracy2 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
CheapfaremartPrice Accuracy-Trust Score*1 star
MytripPrice Accuracy3 starsTrust Score*3 stars
OneTravelPrice Accuracy3 starsTrust Score*3 stars
GurufarePrice Accuracy2 starsTrust Score*3 stars
OvagoPrice Accuracy2 starsTrust Score*2 stars
JustAirTicketPrice Accuracy-Trust Score*1 star

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Seattle-Seoul flights, users find the pricing of Mytrip to be most consistent on Cheapflights vs. Mytrip Users can find the same prices on Seattle-Seoul flight deals on Cheapflights vs. Mytrip >95% of the time. Price accuracy is based on data collected from Seattle-Seoul flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Seattle-Seoul flights, Cheapflights users trust Mytrip the most. Mytrip has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Seattle-Seoul flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Seattle to Seoul

Have a flexible travel schedule? Discover the best time to fly to Seoul 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 Seoul

How far ahead should I book a flight from Seattle to Seoul?

Use this chart to determine the optimal time to book a round-trip flight from Seattle to Seoul. Price data was last updated on December 26, 2025.

Booking 4 days in advance of your planned departure date is, on average, the best time to get cheap flights from Seattle to Seoul. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

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

Currently, April is the cheapest month in which you can book a flight from Seattle to Seoul (average of $335). Flying from Seattle to Seoul in December is currently the most expensive (average of $805). 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 SEL?

Find hourly flight availability from Seattle to Seoul. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 28, 2025.

It’s optimal to fly from Seattle to Seoul in the evening. By choosing this option you can save up to 49% on the cost of your flight, compared to a flight in the afternoon.

Weekly flight availability from Seattle to Seoul

Explore weekly flight availability from Seattle to Seoul. 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 28, 2025.

The most flights from SEA to SEL 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).

How much does it cost to fly round-trip from Seattle to Seoul?

The best insider tips for Seattle to Seoul flights

AI-powered summary based on content written by travel experts. AI can make mistakes.
Cheapflights partnered with top experts to bring you the best recommendations for your Seattle to Seoul trip
Airlines
Korean Air

Korean Air offers lie-flat seats in business class with a 75” pitch and 21” width.


Economy passengers enjoy a 33”-34” seat pitch, more spacious than many competitors.

Read more about Korean AirBy Yulia Denisyuk
Asiana Airlines

Asiana’s A380 business suite features a fully flat 81” bed and 32” entertainment screen.


Economy class on A350 offers extra legroom with 36” pitch in Economy Smartium seats.

Read more about Asiana AirlinesBy Marisa Garcia
Airports
SEA

Use SEA Spot Saver for free security screening appointments, reducing wait times. Book online a few days before your flight.

Read more about SEABy Brandon Schultz
ICN

The AREX express train offers a quick 40-50 minute ride from ICN to Seoul Station, ideal for reaching the city efficiently.

Read more about ICNBy Gabriel Leigh
Our travel experts
Yulia Denisyuk

Yulia Denisyuk

Expert on Korean Air

Yulia Denisyuk

Yulia Denisyuk

Yulia is a freelance journalist who’s dispatched from 90+ countries. Her work focuses on cultures, adventure trips and air travel, appearing in NatGeo, NYT, CNTraveler, and more. For past assignments, she’s stayed with nomads in Mongolia and learned the art of Imigongo in Rwanda. She’s based in Chicago; in winter she often questions that decision.

Read more
Marisa Garcia

Marisa Garcia

Expert on Asiana Airlines

Marisa Garcia

Marisa Garcia

Marisa knows planes inside and out, spending 16 years working on aircraft in hangars at airports around the world. She is an aviation industry expert, specialized in airline interiors and regulations. Ten years ago, she pivoted to journalism. She shares her insights in leading aviation, travel, and business publications and on her site FlightChic.

Read more
Gabriel Leigh

Gabriel Leigh

Expert on ICN

Gabriel Leigh

Gabriel Leigh

Gabriel is a writer and video creator. As senior content producer for Flightradar24 and Monocle’s transport correspondent, he keeps a close eye on aviation in particular. He has also written travel articles for the likes of The New York Times. Born in New York but raised around the world, he now lives in Sweden. He’s been to 75 countries, flying 2.3 million miles on 113 airlines and through 234 airports in the process.

Read more
Brandon Schultz

Brandon Schultz

Expert on SEA

Brandon Schultz

Brandon Schultz

Brandon Schultz is an award-winning food and travel writer based in New York City. His work has appeared in Forbes, AAA, Thrillist, Travel + Leisure, and The Daily Meal, among many others, and he is the author of 6 books, including 3 cookbooks.

Read more

Reviews of airlines servicing Seoul

Get insights into the airlines that provide service to Seoul. 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 Seoul. Reviews last updated December 28, 2025.
Peruse reviews from past customers who have flown with Korean Air, Asiana Airlines, and Alaska Airlines from Seattle to Seoul to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Korean Air
8.5
Very good
1,184 reviews

Overall

8.5

Boarding

8.5

Entertainment

8.2

Crew

8.7

Comfort

8.3

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
8.5
Very good
1,184 reviews
Korean Air
8.5
Very good
1,184 reviews

Overall

8.5

Boarding

8.5

Entertainment

8.2

Crew

8.7

Comfort

8.3

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
502 reviews
Korean Air
8.5
Very good
1,184 reviews

Overall

8.5

Boarding

8.5

Entertainment

8.2

Crew

8.7

Comfort

8.3

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
11,559 reviews
Korean Air
8.5
Very good
1,184 reviews

Overall

8.5

Boarding

8.5

Entertainment

8.2

Crew

8.7

Comfort

8.3

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
8,014 reviews
Korean Air
8.5
Very good
1,184 reviews

Overall

8.5

Boarding

8.5

Entertainment

8.2

Crew

8.7

Comfort

8.3

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
10,563 reviews
Korean Air
8.5
Very good
1,184 reviews

Overall

8.5

Boarding

8.5

Entertainment

8.2

Crew

8.7

Comfort

8.3

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 Seoul. 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 Seoul?

    Seattle/Tacoma Intl (SEA) is the airport you will fly out of if you book a flight from Seattle to Seoul. You should not have trouble finding flights to Seoul from Seattle/Tacoma Intl; the airport handles an average of 7 outbound flights to Seoul per day. You should also have plenty of airline options to choose from since 10 airlines have flights from the Seattle airport to Seoul. It is only a 11.4 mi journey to Seattle/Tacoma Intl (SEA) from Seattle’s city center.

  • How popular is this Seattle to Seoul flight route?

    Within the past month, 200 users have taken a look at flights from Seattle/Tacoma Intl to Seoul.

  • How long is the flight from Seattle to Seoul?

    There are many flights that can get you from Seattle to Seoul in 12h 05m. Fly via Asiana Airlines, Delta, or Japan Airlines to get the fastest option. The distance between Seattle and Seoul is about 5200 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the cheapest airlines flying from Seattle to Seoul round-trip?

    Delta, at $192, was found to be the cheapest airline from Seattle to Seoul.Alternate airlines to your destination round-trip include United Airlines and Hawaiian Airlines. Delta is priced at 81% lower than the current average price of a flight leaving 3 months from now.

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

    To fly one-way, consider booking your trip with Hawaiian Airlines, which is currently one of the cheapest options available, starting at $160. Alaska Airlines flights start at $182 while deals on Asiana Airlines start at $414 one-way.

  • What are the most reliable airlines from Seattle to Seoul?

    No one likes to see their flight delayed. When booking a flight from Seattle to Seoul consider choosing Delta (62%), Korean Air (57%) or Thai Airways (55%) as they are the most reliable in getting you off to your destination on time.

  • What are the cheapest flights from Seattle to Seoul?

    Looking for the cheapest flight from Seattle to Seoul? While on average our users pay $1,219, our data indicates the cheapest price to be $188. The most popular route (Seattle/Tacoma Intl - Incheon Intl), is priced around $732.

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

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

  • How can I find direct flights from Seattle to Seoul?

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

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

    Yes. Cheapflights offers flight deals from Seattle to Seoul 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 Seoul?

    Currently, April is the cheapest month in which you can book a flight from Seattle to Seoul (average of $335). Flying from Seattle to Seoul in December is currently the most expensive (average of $805). 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

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Top 10 airlines flying from Seattle to Seoul

Discover the top 10 airlines that operate flights from Seattle to Seoul. 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 28, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$179Average$1,052FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$282Average$660FlexibilityNo cancel feeOn-time69%
Hawaiian AirlinesCheapest$282Average$884FlexibilityNo cancel feeOn-time85%
Alaska AirlinesCheapest$335Average$338FlexibilityNo cancel feeOn-time75%
Air CanadaCheapest$611Average$984FlexibilityNo cancel feeOn-time67%
Asiana AirlinesCheapest$797Average$1,067FlexibilityNo cancel feeOn-time76%
Korean AirCheapest$847Average$1,170FlexibilityNo cancel feeOn-time81%
China AirlinesCheapest$886Average$1,073FlexibilityNo cancel feeOn-time70%
EVA AirCheapest$978Average$1,089FlexibilityNo cancel feeOn-time74%
Turkish AirlinesCheapest$995Average$1,207FlexibilityNo cancel feeOn-time77%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.