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$344+ 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 3/12. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SEL
Mar 5 — Mar 121
Thu 3/5
Thu 3/12
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 3, 2026.

This oojo deal was found by Cheapflights users on 2/3. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/1211:05 am
SEA
-
ICN
2 stops41h 30m
Hainan Airlines
Wed 3/259:40 pm
ICN
-
SEA
2 stops27h 25m
Hainan Airlines
Deal found 2/3$679
This Gotogate deal was found by Cheapflights users on 2/3. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/110:10 am
PDX
-
ICN
2 stops19h 10m
Multiple Airlines
Tue 9/88:40 pm
ICN
-
PDX
2 stops28h 51m
Multiple Airlines
Deal found 2/3$689
This FlightHub deal was found by Cheapflights users on 2/3. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/1511:45 am
SEA
-
ICN
1 stop20h 40m
Cathay Pacific
Tue 4/211:55 am
ICN
-
SEA
1 stop24h 10m
Cathay Pacific
Deal found 2/3$690
This oojo deal was found by Cheapflights users on 2/2. 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.
Thu 5/711:45 am
SEA
-
ICN
1 stop32h 55m
Cathay Pacific
Mon 5/113:10 pm
ICN
-
SEA
1 stop34h 55m
Cathay Pacific
Deal found 2/2$693
This FlightHub deal was found by Cheapflights users on 2/2. 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 5/511:45 am
SEA
-
ICN
1 stop32h 55m
Cathay Pacific
Wed 5/131:55 am
ICN
-
SEA
1 stop24h 10m
Cathay Pacific
Deal found 2/2$698
This Gotogate deal was found by Cheapflights users on 2/2. 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.
Wed 4/2211:45 am
SEA
-
ICN
1 stop39h 20m
Cathay Pacific
Wed 5/61:40 pm
ICN
-
SEA
1 stop36h 25m
Cathay Pacific
Deal found 2/2$699
This Kiwi.com deal was found by Cheapflights users on 2/2. 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 5/711:45 am
SEA
-
ICN
1 stop34h 20m
Cathay Pacific
Tue 5/121:55 am
ICN
-
SEA
1 stop24h 10m
Cathay Pacific
Deal found 2/2$702
This Kiwi.com deal was found by Cheapflights users on 2/2. 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 4/1311:45 am
SEA
-
ICN
1 stop20h 40m
Cathay Pacific
Wed 4/221:55 am
ICN
-
SEA
1 stop24h 10m
Cathay Pacific
Deal found 2/2$709
This Kiwi.com deal was found by Cheapflights users on 2/2. 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 3/2611:05 am
SEA
-
ICN
2 stops41h 30m
Hainan Airlines
Wed 4/89:15 pm
ICN
-
SEA
2 stops27h 50m
Hainan Airlines
Deal found 2/2$710
This Kiwi.com deal was found by Cheapflights users on 2/2. 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 4/911:45 am
SEA
-
ICN
1 stop32h 55m
Cathay Pacific
Wed 4/221:55 am
ICN
-
SEA
1 stop24h 10m
Cathay Pacific
Deal found 2/2$711
This Kiwi.com deal was found by Cheapflights users on 2/2. 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 4/911:45 am
SEA
-
ICN
1 stop39h 20m
Cathay Pacific
Sun 4/268:05 pm
ICN
-
SEA
1 stop30h 00m
Cathay Pacific
Deal found 2/2$712
This Kiwi.com deal was found by Cheapflights users on 2/2. 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 4/1411:45 am
SEA
-
ICN
1 stop20h 40m
Cathay Pacific
Wed 4/221:55 am
ICN
-
SEA
1 stop24h 10m
Cathay Pacific
Deal found 2/2$713

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 3, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$679
(oojo)

One-way from

$344
(Kiwi.com)

Popular in

July

Cheapest in

November

Average price

$875

Good round-trip deal

$670 or less

Good one-way deal

$357 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. 12% potential increase in price ($148 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($26 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 3, 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

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Tue 3/17

6:21 pm-9:25 pm

2 stops35h 04m

Incheon Intl

Mon 4/13

8:05 pm-10:05 am

1 stop30h 00m

$810

PascoIncheon

PSC - ICN

PSCICN

Pasco Tri Cities

Sun 2/15

5:12 am-6:35 pm

1 stop20h 23m

Incheon Intl

Thu 2/19

8:35 pm-6:27 pm

1 stop14h 52m

$828

PortlandIncheon

PDX - ICN

PDXICN

Portland

Sun 3/1

8:30 am-6:35 pm

1 stop17h 05m

Incheon Intl

Sun 3/8

8:35 pm-8:49 am

1 stop28h 14m

$843

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Sat 4/11

9:08 am-12:25 am

2 stops23h 17m

Incheon Intl

Wed 4/22

1:55 am-10:05 am

1 stop24h 10m

$870

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Thu 4/9

1:00 pm-4:50 pm

Nonstop11h 50m

Incheon Intl

Sun 4/26

7:00 pm-1:07 pm

Nonstop10h 07m

$885

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Wed 4/29

1:00 pm-4:50 pm

Nonstop11h 50m

Incheon Intl

Tue 5/5

7:00 pm-1:11 pm

Nonstop10h 11m

$885

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Tue 4/14

1:00 pm-4:50 pm

Nonstop11h 50m

Incheon Intl

Wed 4/29

7:00 pm-1:07 pm

Nonstop10h 07m

$885

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Thu 4/30

1:00 pm-4:50 pm

Nonstop11h 50m

Incheon Intl

Sun 5/3

7:00 pm-1:11 pm

Nonstop10h 11m

$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

Sun 4/12

1:00 pm-4:50 pm

Nonstop11h 50m

Incheon Intl

Sun 4/26

7:00 pm-1:07 pm

Nonstop10h 07m

$885

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/3

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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 3, 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 3, 2026.

The most flights from USWA to SEL are scheduled on a Monday (8 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (4 on average).

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 11h 50m. Fly via Cathay Pacific, Delta, or Japan 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 Hawaiian Airlines, with whom users have recently found tickets for as low as $160. However, be on the lookout for offers from Asiana Airlines and Korean Air, 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 (83%), Asiana Airlines (83%) or United Airlines (83%) 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 $1,229, our data shows the cheapest flight currently is $306. 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, 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 9 airlines flying from Washington to Seoul

Discover the top 9 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 3, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$212Average$1,163FlexibilityNo cancel feeOn-timeN/A
Hawaiian AirlinesCheapest$282Average$840FlexibilityNo cancel feeOn-time85%
Alaska AirlinesCheapest$335Average$338FlexibilityNo cancel feeOn-time75%
Air CanadaCheapest$528Average$963FlexibilityNo cancel feeOn-time67%
Asiana AirlinesCheapest$712Average$1,019FlexibilityNo cancel feeOn-time76%
Korean AirCheapest$843Average$1,506FlexibilityNo cancel feeOn-time81%
China AirlinesCheapest$869Average$1,132FlexibilityNo cancel feeOn-time70%
EVA AirCheapest$978Average$1,089FlexibilityNo cancel feeOn-time74%
Turkish AirlinesCheapest$995Average$1,207FlexibilityNo cancel feeOn-time77%

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