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$365+ 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 8/30. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SEL
Sep 8 — Sep 151
Tue 9/8
Tue 9/15
1 adult, Economy
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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”

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3. Compare prices and book

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Cheapflights Tip: The best prices from Seattle/Tacoma Intl to Seoul are usually found in November or January, booked 45 days in advance, depart on a Wednesday or Monday and return on a Monday

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 August 9, 2026.

This Ovago deal was found by Cheapflights users on 8/5. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/1710:30 am -
1 stop16h 15m
Sun 10/258:45 pm -
1 stop33h 35m
Deal found 8/5$887
This Kiwi.com deal was found by Cheapflights users on 8/3. 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.
Sat 8/2910:30 am -
1 stop16h 15m
Tue 9/151:30 pm -
2 stops44h 40m
Deal found 8/3$888
This Kiwi.com deal was found by Cheapflights users on 8/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/2810:30 am -
1 stop16h 15m
Tue 9/151:30 pm -
2 stops44h 40m
Deal found 8/3$889
This Kiwi.com deal was found by Cheapflights users on 8/4. 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.
Mon 9/218:15 pm -
3 stops41h 15m
Thu 10/229:20 pm -
Nonstop9h 55m
Deal found 8/4$890
This Kiwi.com deal was found by Cheapflights users on 8/4. 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.
Wed 9/237:25 pm -
3 stops42h 05m
Tue 10/209:20 pm -
Nonstop9h 55m
Deal found 8/4$891
This WestJet deal was found by Cheapflights users on 8/3. 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 WestJet is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/287:35 pm -
1 stop31h 10m
Sun 9/138:45 pm -
1 stop28h 55m
Deal found 8/3$892
This Kiwi.com deal was found by Cheapflights users on 8/6. 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.
Mon 8/2410:30 am -
1 stop16h 15m
Mon 9/712:45 pm -
1 stop23h 00m
Deal found 8/6$893
This WestJet deal was found by Cheapflights users on 8/7. 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 WestJet is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/277:00 am -
1 stop19h 45m
Sun 9/138:45 pm -
1 stop28h 55m
Deal found 8/7$894
This Kiwi.com deal was found by Cheapflights users on 8/3. 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.
Sat 8/2910:30 am -
1 stop16h 15m
Wed 9/167:15 pm -
2 stops30h 27m
Deal found 8/3$895
This Kiwi.com deal was found by Cheapflights users on 8/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/2810:30 am -
1 stop16h 15m
Wed 9/167:15 pm -
2 stops30h 27m
Deal found 8/3$896
This Kiwi.com deal was found by Cheapflights users on 8/8. 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.
Thu 8/2010:30 am -
1 stop16h 15m
Wed 9/237:15 pm -
2 stops39h 21m
Deal found 8/8$898
This Expedia deal was found by Cheapflights users on 8/7. 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.
Sun 11/158:40 am -
2 stops20h 35m
Tue 11/241:40 pm -
2 stops17h 57m
Deal found 8/7$1,002

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 August 9, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$887
(Ovago)

One-way from

$365
(Super.com)

Popular in

June

Cheapest in

November

Average price

$995

Good round-trip deal

$851 or less

Good one-way deal

$428 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. 8% potential increase in price ($85 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($20 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in August 2026
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 August 9, 2026.
Use the filters below to find and compare flights from Seattle to Seoul that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattleIncheon

SEA Seattle/Tacoma Intl - ICN Incheon Intl

SEAICN

Seattle/Tacoma Intl

Sat 10/24

7:11 am-4:15 pm

1 stop17h 04m

Incheon Intl

Tue 11/17

6:00 pm-4:27 pm

1 stop15h 27m

$1,057

SeattleIncheon

SEA Seattle/Tacoma Intl - ICN Incheon Intl

SEAICN

Seattle/Tacoma Intl

Thu 9/24

11:45 am-12:25 am

1 stop20h 40m

Incheon Intl

Sun 10/18

8:05 pm-12:56 pm

2 stops32h 51m

$1,062

SeattleIncheon

SEA Seattle/Tacoma Intl - ICN Incheon Intl

SEAICN

Seattle/Tacoma Intl

Sun 11/1

7:35 pm-5:40 am

1 stop17h 05m

Incheon Intl

Thu 11/5

12:45 pm-7:37 pm

2 stops23h 52m

$1,062

SeattleIncheon

SEA Seattle/Tacoma Intl - ICN Incheon Intl

SEAICN

Seattle/Tacoma Intl

Thu 1/14

6:57 am-4:15 pm

1 stop16h 18m

Incheon Intl

Tue 1/19

12:45 pm-9:12 pm

3 stops25h 27m

$1,062

SeattleIncheon

SEA Seattle/Tacoma Intl - ICN Incheon Intl

SEAICN

Seattle/Tacoma Intl

Mon 9/7

12:25 pm-10:25 pm

1 stop18h 00m

Incheon Intl

Sun 9/13

3:10 pm-8:08 am

2 stops32h 58m

$1,075

SeattleSeoul

SEA Seattle/Tacoma Intl - GMP Seoul Gimpo Intl

SEAGMP

Seattle/Tacoma Intl

Mon 11/2

12:10 am-7:15 pm

1 stop26h 05m

Seoul Gimpo Intl

Sat 11/14

1:50 pm-5:30 pm

1 stop20h 40m

$1,096

SeattleIncheon

SEA Seattle/Tacoma Intl - ICN Incheon Intl

SEAICN

Seattle/Tacoma Intl

Tue 11/17

7:05 pm-6:20 pm

1 stop30h 15m

Incheon Intl

Thu 12/17

12:05 am-5:10 pm

1 stop34h 05m

$1,181

SeattleSeoul

SEA Seattle/Tacoma Intl - GMP Seoul Gimpo Intl

SEAGMP

Seattle/Tacoma Intl

Sun 10/4

1:30 am-6:10 pm

1 stop24h 40m

Seoul Gimpo Intl

Fri 11/13

1:50 pm-6:10 pm

1 stop21h 20m

$1,182

SeattleSeoul

SEA Seattle/Tacoma Intl - GMP Seoul Gimpo Intl

SEAGMP

Seattle/Tacoma Intl

Wed 10/7

1:30 am-12:50 pm

1 stop19h 20m

Seoul Gimpo Intl

Fri 11/13

1:50 pm-6:10 pm

1 stop21h 20m

$1,182

SeattleSeoul

SEA Seattle/Tacoma Intl - GMP Seoul Gimpo Intl

SEAGMP

Seattle/Tacoma Intl

Sun 10/4

1:30 am-6:10 pm

1 stop24h 40m

Seoul Gimpo Intl

Sat 11/14

1:50 pm-5:30 pm

1 stop20h 40m

$1,182

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/6

Showing 1-10 of 43 resultsSorted by cheapest first
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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 August.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*3 stars
Kiwi.comPrice Accuracy3 starsTrust Score*3 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 FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Seattle-Seoul flight deals on Cheapflights vs. FlightHub >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 FlightHub the most. FlightHub 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

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 $344). Flying from Seattle to Seoul in December is currently the most expensive (average of $1,347). 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 August 9, 2026.

It’s optimal to fly from Seattle to Seoul at noon. 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 August 9, 2026.

The most flights from SEA to SEL are scheduled on a Friday (9 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (5 on average).

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

Airfare is typical for this route at the moment.
Seattle to Seoul flights typically cost between $848 and $1,309 in October.
The cheapest round-trip price found within the last 5 days was $887 on WestJet (Oct 17-Oct 25).

What’s the top layover airport for flights from Seattle to Seoul?

Share of 1-stop round-trip flights from Seattle to Seoul chosen by Cheapflights users in the past 12 months, using the same layover each way.

Hong Kong (HKG) – chosen by Cheapflights users on 75% of 1-stop itineraries from Seattle to Seoul on Cheapflights.

What’s the cheapest layover airport for flights from Seattle to Seoul?

Average round-trip fare for 1-stop flights from Seattle to Seoul, chosen by Cheapflights users in the past 12 months, with the same layover each way.

Hong Kong (HKG) is the most affordable 1-stop option, with an average round-trip price of $855.

What’s the fastest layover option from Seattle to Seoul?

Shortest average travel time for 1-stop one-way flights from Seattle to Seoul, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by layover airport.

Flights via Calgary (YYC) have the shortest average one-way travel time for 1-stop routes: 16h 15m.

Which airport typically offers the quickest layover for flights from Seattle to Seoul?

Average layover duration for 1-stop one-way flights from Seattle to Seoul, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

Flights via Hong Kong (HKG) offer the fastest connection on this route, with an average layover time of 1h 52m.

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

Booking 68 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.

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
Our travel experts
Yulia Denisyuk

Yulia Denisyuk

Expert on Korean Air

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 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 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 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 August 9, 2026.
Peruse reviews from past customers who have flown with Korean Air,Asiana Airlines, andAlaska 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
8.4
Very good
1,222 reviews

Comfort

8.3

Crew

8.7

Overall

8.4

Food

8.1

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
1,222 reviews
Korean Air
8.4
Very good
1,222 reviews

Comfort

8.3

Crew

8.7

Overall

8.4

Food

8.1

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
8.1
Very good
554 reviews
Korean Air
8.4
Very good
1,222 reviews

Comfort

8.3

Crew

8.7

Overall

8.4

Food

8.1

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
7.9
Good
12,787 reviews
Korean Air
8.4
Very good
1,222 reviews

Comfort

8.3

Crew

8.7

Overall

8.4

Food

8.1

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
7.8
Good
8,498 reviews
Korean Air
8.4
Very good
1,222 reviews

Comfort

8.3

Crew

8.7

Overall

8.4

Food

8.1

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
11,455 reviews
Korean Air
8.4
Very good
1,222 reviews

Comfort

8.3

Crew

8.7

Overall

8.4

Food

8.1

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 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 7 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 long is the flight from Seattle to Seoul?

    There are many flights that can get you from Seattle to Seoul in 17h 04m. Fly via United Airlines, Cathay Pacific, or EVA Air 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?

    Hawaiian Airlines, at $160, was found to be the cheapest airline from Seattle to Seoul.Alternate airlines to your destination round-trip include Alaska Airlines and Air Canada. Hawaiian Airlines is priced at 83% 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 WestJet start at $344 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 Asiana Airlines (98%), Thai Airways (98%) or United Airlines (98%) 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 $2,314, our data indicates the cheapest price to be $400. The most popular route (Seattle/Tacoma Intl - Incheon Intl), is priced around $792.

  • 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 $344). Flying from Seattle to Seoul in December is currently the most expensive (average of $1,347). 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

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Alternative routes for Seattle to Seoul

See prices for flight routes from nearby airports that may be better suited for you.
Seattle to Incheon Intl flights
Portland to Incheon Intl flights
Seattle to Jeju City flights
Spokane to Incheon Intl flights

Top 7 airlines flying from Seattle to Seoul

Discover the top 7 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 August 9, 2026.
AirlineCheapestAverageFlexibilityOn-time
Hawaiian AirlinesCheapest$160Average$718FlexibilityNo cancel feeOn-time85%
Alaska AirlinesCheapest$335Average$338FlexibilityNo cancel feeOn-time75%
Air CanadaCheapest$523Average$681FlexibilityNo cancel feeOn-time67%
Cathay PacificCheapest$762Average$878FlexibilityNo cancel feeOn-time72%
Asiana AirlinesCheapest$783Average$877FlexibilityNo cancel feeOn-time76%
DeltaCheapest$829Average$995FlexibilityNo cancel feeOn-timeN/A
Korean AirCheapest$843Average$985FlexibilityNo cancel feeOn-time81%

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