Seoul

$352+ 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 10/2. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SEL
Aug 12 — Aug 191
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Cheapflights Tip: The best prices from Seattle/Tacoma Intl to Seoul are usually found in February or January, booked 44 days in advance, depart on a Monday or Wednesday and return on a Wednesday

Cheap 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 7, 2025.

Round-trip from

$814
(Air Canada)

One-way from

$352
(Kiwi.com)

Popular in

June

Cheapest in

February

Average price

$1,247

Good round-trip deal

$724 or less

Good one-way deal

$378 or less
From Seattle/Tacoma Intl to Seoul (SEL)
One-way flight from Seattle/Tacoma Intl to Seoul (SEL)
Highest demand for flights based on searches. 13% potential increase in price ($180 potential increase over avg. RT price).
Cheapest flight prices on average. 3% potential price decrease ($34 potential savings vs. average RT price).
Average for round-trip flights in August 2025
Price to beat on a round-trip flight from Seattle/Tacoma Intl to Seoul (SEL).
Price to beat on a one-way flight from Seattle/Tacoma Intl to Seoul (SEL).

Find 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 7, 2025.

This Air Canada 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/67:15 pmSEA - ICN
1 stop28h 50mMultiple Airlines
Thu 10/2310:35 amICN - SEA
2 stops19h 41mMultiple Airlines
Deal found 8/6$814
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.
Sat 9/131:50 pmSEA - ICN
1 stop36h 55mMultiple Airlines
Mon 11/36:55 pmICN - SEA
1 stop17h 04mMultiple Airlines
Deal found 8/6$815
This Air Canada 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/810:00 amSEA - ICN
2 stops19h 40mMultiple Airlines
Mon 9/2210:40 amICN - SEA
2 stops19h 36mMultiple Airlines
Deal found 8/7$816
This oojo 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/17:59 pmSEA - ICN
2 stops33h 11mCathay Pacific
Wed 11/1910:05 amICN - SEA
2 stops29h 19mCathay Pacific
Deal found 8/6$817
This Flightnetwork 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 Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/72:30 pmSEA - ICN
Nonstop11h 25mAsiana Airlines
Thu 8/216:20 pmICN - SEA
Nonstop10h 25mAsiana Airlines
Deal found 8/5$818
This Air Canada 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/110:00 amSEA - ICN
2 stops19h 10mMultiple Airlines
Thu 10/2310:40 amICN - SEA
2 stops19h 36mMultiple Airlines
Deal found 8/7$819
This oojo 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/72:15 pmSEA - ICN
Nonstop11h 40mAsiana Airlines
Sun 9/146:20 pmICN - SEA
Nonstop10h 10mAsiana Airlines
Deal found 8/6$820
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.
Sun 9/148:40 amSEA - ICN
1 stop18h 05mMultiple Airlines
Wed 10/156:20 pmICN - SEA
1 stop17h 11mMultiple Airlines
Deal found 8/6$821
This FlightHub 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/202:15 pmSEA - ICN
Nonstop11h 40mAsiana Airlines
Sat 10/116:20 pmICN - SEA
Nonstop10h 10mAsiana Airlines
Deal found 8/6$822
This Air Canada 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/2710:05 amSEA - ICN
2 stops19h 00mMultiple Airlines
Mon 11/176:55 pmICN - SEA
1 stop12h 31mMultiple Airlines
Deal found 8/6$823
This oojo 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/247:00 amSEA - ICN
2 stops37h 40mCathay Pacific
Thu 9/1110:10 amICN - SEA
2 stops27h 48mCathay Pacific
Deal found 8/6$824
This Air Canada 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/810:00 amSEA - ICN
2 stops19h 10mMultiple Airlines
Wed 9/2410:35 amICN - SEA
2 stops19h 41mMultiple Airlines
Deal found 8/6$825

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 7, 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

Sat 9/6

7:15 pm-4:05 pm

1 stop28h 50m

Incheon Intl

Thu 10/23

10:35 am-2:16 pm

2 stops19h 41m

$814

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Sat 9/13

1:50 pm-6:45 pm

1 stop36h 55m

Incheon Intl

Mon 11/3

6:55 pm-6:59 pm

1 stop17h 04m

$815

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Mon 9/8

10:00 am-9:40 pm

2 stops19h 40m

Incheon Intl

Mon 9/22

10:40 am-2:16 pm

2 stops19h 36m

$816

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Wed 10/1

7:59 pm-9:10 pm

2 stops33h 11m

Incheon Intl

Wed 11/19

10:05 am-10:24 pm

2 stops29h 19m

$817

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Mon 8/18

10:00 am-8:00 pm

2 stops18h 00m

Incheon Intl

Mon 9/15

5:45 pm-2:16 pm

1 stop12h 31m

$818

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Mon 9/1

10:00 am-9:10 pm

2 stops19h 10m

Incheon Intl

Thu 10/23

10:40 am-2:16 pm

2 stops19h 36m

$819

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Sun 9/7

2:15 pm-5:55 pm

Nonstop11h 40m

Incheon Intl

Sun 9/14

6:20 pm-12:30 pm

Nonstop10h 10m

$820

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Sun 9/14

8:40 am-6:45 pm

1 stop18h 05m

Incheon Intl

Wed 10/15

6:20 pm-7:31 pm

1 stop17h 11m

$821

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Sat 9/20

2:15 pm-5:55 pm

Nonstop11h 40m

Incheon Intl

Sat 10/11

6:20 pm-12:30 pm

Nonstop10h 10m

$822

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Mon 10/27

10:05 am-9:05 pm

2 stops19h 00m

Incheon Intl

Mon 11/17

6:55 pm-2:26 pm

1 stop12h 31m

$823

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/7

Showing 1-10 of 37 results
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The best insider tips for Seattle to Seoul flights

Snippets provided in this section are AI-generated based on a summarization of Cheapflights-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.
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.

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.

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

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 August 1, 2025.

Booking 44 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, February is the cheapest month in which you can book a flight from Seattle to Seoul (average of $995). Flying from Seattle to Seoul in December is currently the most expensive (average of $1,635). 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 7, 2025.

It’s optimal to fly from Seattle to Seoul in the evening. By choosing this option you can save up to 47% on the cost of your flight, compared to a flight in the afternoon.

What is the cheapest day to fly from Seattle to Seoul?

Use this chart to determine the cheapest time to fly round-trip from Seattle to Seoul. Price data was last updated on December 16, 2024.

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

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 7, 2025.

The most flights from SEA to SEL are scheduled on a Monday (8 on average). You will have fewer flight options on Friday, which is when the least amount of flights are scheduled (7 on average).

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

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.

Vancouver (YVR) – chosen by Cheapflights users on 65% 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.

Vancouver (YVR) is the most affordable 1-stop option, with an average round-trip price of $871.

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 Honolulu (HNL) have the shortest average one-way travel time for 1-stop routes: 19h 25m.

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 Honolulu (HNL) offer the fastest connection on this route, with an average layover time of 2h 33m.

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 7, 2025.
Peruse reviews from past customers who have flown with EVA Air, Korean Air, and ANA 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.

Comfort

8.3

Overall

8.4

Crew

8.6

Entertainment

8.0

Boarding

8.4

Food

8.1

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

TPE - SEA

The flight and crew were exceptional as always when I fly with EVA.

Comfort

8.3

Overall

8.4

Crew

8.6

Entertainment

8.0

Boarding

8.4

Food

8.1

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

TPE - SEA

The flight and crew were exceptional as always when I fly with EVA.

Comfort

8.3

Overall

8.4

Crew

8.6

Entertainment

8.0

Boarding

8.4

Food

8.1

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

TPE - SEA

The flight and crew were exceptional as always when I fly with EVA.
8.4
Very good

Comfort

8.3

Overall

8.4

Crew

8.6

Entertainment

8.0

Boarding

8.4

Food

8.1

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

TPE - SEA

The flight and crew were exceptional as always when I fly with EVA.

Comfort

8.3

Overall

8.4

Crew

8.6

Entertainment

8.0

Boarding

8.4

Food

8.1

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

TPE - SEA

The flight and crew were exceptional as always when I fly with EVA.

Comfort

8.3

Overall

8.4

Crew

8.6

Entertainment

8.0

Boarding

8.4

Food

8.1

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

TPE - SEA

The flight and crew were exceptional as always when I fly with EVA.

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?

  • What is the cheapest airline to fly from Seattle to Seoul round-trip?

    Japan Airlines, at $870, was found to be the cheapest airline from Seattle to Seoul.. Japan Airlines is priced at 24% lower than the current average price of a flight leaving 3 months from now.

  • 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 (71%), Korean Air (68%) or Thai Airways (48%) 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 $1,881, our data indicates the cheapest price to be $352. The most popular route (Seattle/Tacoma Intl - Incheon Intl), is priced around $741.

  • 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, February is the cheapest month in which you can book a flight from Seattle to Seoul (average of $995). Flying from Seattle to Seoul in December is currently the most expensive (average of $1,635). 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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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 August 7, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$167Average$1,281FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$182Average$998FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$282Average$865FlexibilityNo cancel feeOn-time69%
Hawaiian AirlinesCheapest$763Average$1,550FlexibilityNo cancel feeOn-time85%
Air CanadaCheapest$798Average$904FlexibilityNo cancel feeOn-time67%
China AirlinesCheapest$886Average$1,070FlexibilityNo cancel feeOn-time70%
Asiana AirlinesCheapest$899Average$1,147FlexibilityNo cancel feeOn-time76%
Korean AirCheapest$908Average$1,196FlexibilityNo cancel feeOn-time81%
EVA AirCheapest$978Average$1,090FlexibilityNo cancel feeOn-time74%
Turkish AirlinesCheapest$1,007Average$1,217FlexibilityNo cancel feeOn-time77%

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