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$353+ 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 11/20. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SEL
Nov 22 — Nov 291
Sat 11/22
Sat 11/29
1 adult, Economy
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Find 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 October 23, 2025.

This Booking.com deal was found by Cheapflights users on 10/23. 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 11/68:00 pmSEA - ICN
1 stop28h 10mAir Canada
Sun 11/96:55 pmICN - SEA
1 stop12h 36mAir Canada
Deal found 10/23$750
This Booking.com deal was found by Cheapflights users on 10/23. 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 10/3011:05 amSEA - ICN
2 stops41h 55mMultiple Airlines
Thu 11/69:00 pmICN - SEA
Nonstop9h 55mMultiple Airlines
Deal found 10/23$758
This Expedia deal was found by Cheapflights users on 10/23. 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.
Thu 11/610:05 amSEA - ICN
1 stop14h 05mAir Canada
Thu 11/206:55 pmICN - SEA
1 stop20h 11mAir Canada
Deal found 10/23$760
This Kiwi.com deal was found by Cheapflights users on 10/23. 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 11/1812:10 amSEA - ICN
Nonstop12h 10mMultiple Airlines
Sun 11/309:20 pmICN - SEA
2 stops30h 02mMultiple Airlines
Deal found 10/23$765
This Gotogate deal was found by Cheapflights users on 10/21. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/610:05 amSEA - ICN
1 stop14h 05mAir Canada
Wed 11/196:55 pmICN - SEA
1 stop12h 36mAir Canada
Deal found 10/21$768
This KAYAK deal was found by Cheapflights users on 10/21. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/1310:05 amSEA - ICN
2 stops41h 55mHainan Airlines
Wed 11/2610:10 pmICN - SEA
2 stops26h 55mHainan Airlines
Deal found 10/21$769
This Kiwi.com deal was found by Cheapflights users on 10/22. 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 11/99:30 pmSEA - ICN
2 stops35h 05mMultiple Airlines
Sat 11/299:20 pmICN - SEA
1 stop16h 18mMultiple Airlines
Deal found 10/22$770
This Booking.com deal was found by Cheapflights users on 10/23. 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 11/1310:05 amSEA - ICN
1 stop14h 05mAir Canada
Wed 11/196:55 pmICN - SEA
1 stop17h 21mAir Canada
Deal found 10/23$772
This Kiwi.com deal was found by Cheapflights users on 10/22. 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 11/1311:29 amSEA - ICN
1 stop17h 06mMultiple Airlines
Thu 11/279:20 pmICN - SEA
1 stop28h 39mMultiple Airlines
Deal found 10/22$773
This Kiwi.com deal was found by Cheapflights users on 10/21. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/149:08 amSEA - ICN
1 stop27h 02mMultiple Airlines
Sat 11/229:20 pmICN - SEA
1 stop14h 26mMultiple Airlines
Deal found 10/21$775
This Priceline deal was found by Cheapflights users on 10/21. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/2710:05 amSEA - ICN
2 stops41h 55mMultiple Airlines
Sun 12/75:55 pmICN - SEA
1 stop13h 36mMultiple Airlines
Deal found 10/21$776
This Air Canada deal was found by Cheapflights users on 10/23. 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 12/17:00 pmPDX - ICN
1 stop28h 00mAir Canada
Mon 12/86:55 pmICN - PDX
1 stop12h 45mAir Canada
Deal found 10/23$813

Cheap flight deals from Washington to Seoul

Keep the following information in mind while searching for Washington to Seoul flight deals. Data was last updated October 23, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$768
(Gotogate)

One-way from

$353
(Mytrip)

Popular in

June

Cheapest in

August

Average price

$971

Good round-trip deal

$670 or less

Good one-way deal

$373 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. 17% potential increase in price ($229 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($38 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
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 October 23, 2025.
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

Thu 4/16

11:30 am-6:35 pm

1 stop15h 05m

Incheon Intl

Mon 4/20

8:35 pm-12:03 am

1 stop19h 28m

$816

PortlandIncheon

PDX - ICN

PDXICN

Portland

Tue 12/2

9:50 am-10:25 pm

2 stops19h 35m

Incheon Intl

Fri 12/12

5:55 pm-6:30 pm

1 stop17h 35m

$836

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Tue 11/18

12:00 pm-5:40 am

3 stops24h 40m

Incheon Intl

Tue 11/25

12:45 pm-1:38 pm

1 stop17h 53m

$849

PortlandIncheon

PDX - ICN

PDXICN

Portland

Sat 2/7

10:30 am-6:35 pm

1 stop15h 05m

Incheon Intl

Fri 2/13

8:35 pm-5:59 pm

1 stop14h 24m

$851

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Mon 11/17

7:10 am-5:40 pm

1 stop17h 30m

Incheon Intl

Thu 11/20

4:10 pm-9:00 am

Nonstop9h 50m

$854

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Tue 11/18

7:10 am-5:40 pm

1 stop17h 30m

Incheon Intl

Tue 11/25

4:10 pm-9:00 am

Nonstop9h 50m

$854

SeattleSeoul

SEA - GMP

SEAGMP

Seattle/Tacoma Intl

Tue 2/10

3:39 pm-10:05 pm

2 stops37h 26m

Seoul Gimpo Intl

Tue 2/17

8:00 am-9:02 am

2 stops42h 02m

$862

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Fri 11/28

11:15 am-4:30 pm

Nonstop12h 15m

Incheon Intl

Fri 12/26

8:05 pm-1:20 pm

Nonstop10h 15m

$869

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Mon 2/16

11:25 am-4:30 pm

Nonstop12h 05m

Incheon Intl

Sat 2/28

8:05 pm-1:20 pm

Nonstop10h 15m

$869

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Thu 3/26

2:40 pm-6:35 pm

Nonstop11h 55m

Incheon Intl

Sun 4/5

8:35 pm-2:30 pm

Nonstop9h 55m

$870

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/21

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, August is the cheapest month in which you can book a flight from State of Washington to Seoul (average of $206). Flying from State of Washington to Seoul in July is currently the most expensive (average of $977). 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 October 23, 2025.

It’s optimal to fly from State of Washington to Seoul in the afternoon. By choosing this option you can save up to 18% on the cost of your flight, compared to a flight in the morning.

What is the cheapest day to fly from State of Washington to Seoul?

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

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

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 popular is this State of Washington to Seoul flight route?

    Flights from Washington to Seoul have been viewed 200 times in the past calendar month.

  • 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 15h 05m. Fly via Alaska Airlines, United Airlines, or Delta to get the fastest option. There are 5273 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 Hainan Airlines, with whom users have recently found tickets for as low as $399. However, be on the lookout for offers from Air Canada 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 Delta (69%), Korean Air (56%) or Alaska Airlines (35%) 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 $1,362, our data shows the cheapest flight currently is $345. When looking at the most popular route, (Seattle/Tacoma Intl - Incheon Intl), you can expect to pay $693 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, August is the cheapest month in which you can book a flight from State of Washington to Seoul (average of $206). Flying from State of Washington to Seoul in July is currently the most expensive (average of $977). 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.

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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 October 23, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$167Average$1,185FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$190Average$989FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$282Average$974FlexibilityNo cancel feeOn-time69%
Hawaiian AirlinesCheapest$282Average$998FlexibilityNo cancel feeOn-time85%
Air CanadaCheapest$678Average$965FlexibilityNo cancel feeOn-time67%
Asiana AirlinesCheapest$802Average$1,090FlexibilityNo cancel feeOn-time76%
Korean AirCheapest$851Average$1,544FlexibilityNo cancel feeOn-time81%
China AirlinesCheapest$886Average$1,059FlexibilityNo cancel feeOn-time70%
EVA AirCheapest$978Average$1,089FlexibilityNo cancel feeOn-time74%
Turkish AirlinesCheapest$1,007Average$1,217FlexibilityNo cancel feeOn-time77%

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