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$323+ Cheap flights from Washington 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 3/26. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SEL
Mar 23 — Mar 301
Mon 3/23
Mon 3/30
1 adult, Economy
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Cheap flight deals from Washington to Seoul

Cheapest flights from Washington to Seoul
Explore the most affordable flight options available from Washington to Seoul. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 21, 2026.

This CheapOair deal was found by Cheapflights users on 2/19. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/309:50 am
PDX
-
ICN
1 stop14h 15m
Multiple Airlines
Mon 6/18:40 pm
ICN
-
PDX
2 stops28h 50m
Multiple Airlines
Deal found 2/19$636
This CheapOair deal was found by Cheapflights users on 2/18. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/145:40 am
SEA
-
ICN
2 stops23h 40m
Multiple Airlines
Tue 4/288:40 pm
ICN
-
SEA
2 stops28h 55m
Multiple Airlines
Deal found 2/18$641
This CheapOair deal was found by Cheapflights users on 2/19. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/263:40 pm
SEA
-
ICN
1 stop32h 25m
Multiple Airlines
Sun 5/248:40 pm
ICN
-
SEA
2 stops28h 35m
Multiple Airlines
Deal found 2/19$657
This CheapOair deal was found by Cheapflights users on 2/19. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/273:40 pm
SEA
-
ICN
1 stop32h 25m
Multiple Airlines
Mon 5/48:40 pm
ICN
-
SEA
2 stops28h 35m
Multiple Airlines
Deal found 2/19$658
This CheapOair deal was found by Cheapflights users on 2/21. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/243:40 pm
SEA
-
ICN
1 stop32h 25m
Multiple Airlines
Mon 4/278:40 pm
ICN
-
SEA
2 stops28h 55m
Multiple Airlines
Deal found 2/21$663
This Booking.com deal was found by Cheapflights users on 2/19. 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.
Thu 4/95:40 am
SEA
-
ICN
1 stop18h 25m
Air Canada
Tue 4/215:45 pm
ICN
-
SEA
1 stop21h 05m
Air Canada
Deal found 2/19$669
This CheapOair deal was found by Cheapflights users on 2/18. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/173:40 pm
SEA
-
ICN
1 stop32h 25m
Multiple Airlines
Sun 4/268:40 pm
ICN
-
SEA
2 stops28h 55m
Multiple Airlines
Deal found 2/18$673
This CheapOair deal was found by Cheapflights users on 2/21. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/309:50 am
PDX
-
ICN
1 stop14h 15m
Multiple Airlines
Thu 5/288:40 pm
ICN
-
PDX
2 stops28h 50m
Multiple Airlines
Deal found 2/21$676
This Booking.com deal was found by Cheapflights users on 2/19. 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.
Mon 10/510:30 am
SEA
-
ICN
2 stops19h 10m
Multiple Airlines
Mon 10/195:45 pm
ICN
-
SEA
1 stop20h 37m
Multiple Airlines
Deal found 2/19$679
This Gurufare deal was found by Cheapflights users on 2/18. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/112:25 pm
SEA
-
ICN
1 stop18h 00m
Cathay Pacific
Tue 9/158:00 am
ICN
-
SEA
1 stop18h 20m
Cathay Pacific
Deal found 2/18$680
This CheapOair deal was found by Cheapflights users on 2/21. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/263:40 pm
SEA
-
ICN
2 stops30h 05m
Multiple Airlines
Wed 5/68:40 pm
ICN
-
SEA
2 stops28h 35m
Multiple Airlines
Deal found 2/21$682
This CheapOair deal was found by Cheapflights users on 2/17. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/127:05 pm
PDX
-
ICN
1 stop29h 00m
Multiple Airlines
Sat 4/258:40 pm
ICN
-
PDX
2 stops28h 30m
Multiple Airlines
Deal found 2/17$683

Find flight deals from Washington to Seoul

Keep the following information in mind while searching for Washington to Seoul flight deals. Data was last updated February 21, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$636
(CheapOair)

One-way from

$323
(Gurufare)

Popular in

July

Cheapest in

November

Average price

$870

Good round-trip deal

$672 or less

Good one-way deal

$353 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 Washington to Seoul (SEL)
Search Deals
One-way flight from Washington to Seoul (SEL)
Search Deals
Highest demand for flights based on searches. 13% potential increase in price ($152 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($27 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 2026
Search Deals
Price to beat on a round-trip flight from Washington to Seoul (SEL).
Search Deals
Price to beat on a one-way flight from Washington to Seoul (SEL).
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Washington 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 February 21, 2026.
Use the filters below to find and compare flights from Washington to Seoul that are best for you.

Fly from

Washington

Fly to

Seoul

Route

Depart

Return

Price

PortlandIncheon

PDX - ICN

PDXICN

Portland

Sun 4/19

7:05 pm-4:05 pm

1 stop29h 00m

Incheon Intl

Sat 5/2

8:40 pm-7:05 pm

2 stops38h 25m

$762

PortlandIncheon

PDX - ICN

PDXICN

Portland

Sun 4/5

3:15 pm-4:05 pm

1 stop32h 50m

Incheon Intl

Sat 5/2

8:40 pm-9:30 am

2 stops28h 50m

$762

PortlandIncheon

PDX - ICN

PDXICN

Portland

Mon 5/4

9:48 pm-12:25 am

2 stops34h 37m

Incheon Intl

Mon 5/18

6:00 pm-9:29 am

1 stop31h 29m

$833

PortlandIncheon

PDX - ICN

PDXICN

Portland

Sun 4/12

7:05 pm-4:05 pm

1 stop29h 00m

Incheon Intl

Fri 5/1

1:55 am-9:30 am

2 stops23h 35m

$847

PortlandIncheon

PDX - ICN

PDXICN

Portland

Tue 3/17

7:05 pm-4:15 pm

1 stop29h 10m

Incheon Intl

Tue 3/24

5:55 pm-6:30 pm

1 stop16h 35m

$854

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Sat 4/18

1:15 am-7:05 pm

1 stop25h 50m

Incheon Intl

Tue 5/12

8:05 pm-7:15 pm

1 stop15h 10m

$863

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Thu 3/5

1:40 pm-6:35 pm

Nonstop11h 55m

Incheon Intl

Sun 3/15

8:35 pm-2:45 pm

Nonstop10h 10m

$885

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Wed 3/4

11:30 am-4:30 pm

Nonstop12h 00m

Incheon Intl

Tue 3/17

8:05 pm-2:20 pm

Nonstop10h 15m

$885

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Thu 4/9

1:00 pm-4:50 pm

Nonstop11h 50m

Incheon Intl

Thu 4/23

7:00 pm-1:07 pm

Nonstop10h 07m

$885

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Sun 4/26

1:00 pm-4:50 pm

Nonstop11h 50m

Incheon Intl

Fri 5/22

7:00 pm-1:11 pm

Nonstop10h 11m

$885

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/19

Showing 1-10 of 60 results
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Best time to book a flight from Washington to Seoul

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

What is the cheapest month to book a flight from State of Washington to Seoul?

Currently, April is the cheapest month in which you can book a flight from State of Washington to Seoul (average of $335). Flying from State of Washington to Seoul in December is currently the most expensive (average of $766). 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 WA to SEL?

Find hourly flight availability from Washington 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 February 21, 2026.

It’s optimal to fly from State of Washington 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 State of Washington to Seoul

Explore weekly flight availability from Washington 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 February 21, 2026.

The most flights from USWA to SEL are scheduled on a Thursday (10 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (6 on average).

How much does it cost to fly round-trip from State of Washington to Seoul?

Related info for your journey

Find useful and relevant information for your journey from Washington to Seoul. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from State of Washington to Seoul?

    There are many flights that can get you from State of Washington to Seoul in 11h 55m. Fly via Air Canada, China Airlines, or Alaska Airlines to get the fastest option. There are 5200 mi between State of Washington and Seoul. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the cheapest airlines to fly from State of Washington to Seoul one-way?

    The cheapest airline one-way is Alaska Airlines, with whom users have recently found tickets for as low as $182. However, be on the lookout for offers from Hawaiian Airlines and Asiana Airlines, as they are both options that can get you from State of Washington to Seoul for a low price.

  • What are the most popular routes from State of Washington to Seoul?

    When deciding which route to take from State of Washington to Seoul consider Seattle/Tacoma Intl - Incheon Intl, Seattle/Tacoma Intl - Seoul Gimpo Intl or Portland - Incheon Intl as they are the most popular.

  • What are the most reliable airlines from State of Washington to Seoul?

    Consider Thai Airways (91%), Asiana Airlines (91%) or United Airlines (91%) when booking your flight. These represent the most reliable airlines when flying from State of Washington to Seoul.

  • What are the cheapest flights from State of Washington to Seoul?

    While on average a flight from State of Washington to Seoul is generally $1,238, our data shows the cheapest flight currently is $291. When looking at the most popular route, (Seattle/Tacoma Intl - Incheon Intl), you can expect to pay $613 for that flight.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Washington 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 State of Washington to Seoul?

    Currently, April is the cheapest month in which you can book a flight from State of Washington to Seoul (average of $335). Flying from State of Washington to Seoul in December is currently the most expensive (average of $766). 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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Alternative routes for Washington to Seoul

See prices for flight routes from nearby airports that may be better suited for you.
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Top 10 airlines flying from Washington to Seoul

Discover the top 10 airlines that operate flights from Washington 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 February 21, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$212Average$1,135FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$282Average$660FlexibilityNo cancel feeOn-time69%
Hawaiian AirlinesCheapest$282Average$840FlexibilityNo cancel feeOn-time85%
Alaska AirlinesCheapest$335Average$338FlexibilityNo cancel feeOn-time75%
Air CanadaCheapest$531Average$947FlexibilityNo cancel feeOn-time67%
Asiana AirlinesCheapest$691Average$956FlexibilityNo cancel feeOn-time76%
Alaska AirlinesCheapest$799Average$885FlexibilityNo cancel feeOn-timeN/A
Korean AirCheapest$843Average$1,112FlexibilityNo cancel feeOn-time81%
China AirlinesCheapest$863Average$1,103FlexibilityNo cancel feeOn-time70%
EVA AirCheapest$978Average$1,089FlexibilityNo cancel feeOn-time74%

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