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$345+ 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 2/7. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SEL
Jan 17 — Jan 241
Sat 1/17
Sat 1/24
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 December 18, 2025.

This Kiwi.com deal was found by Cheapflights users on 12/15. 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 12/261:40 pmSEA - ICN
Nonstop11h 55mMultiple Airlines
Sun 1/259:20 pmICN - SEA
2 stops30h 02mMultiple Airlines
Deal found 12/15$921
This Delta deal was found by Cheapflights users on 12/15. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/2710:15 pmSEA - ICN
1 stop26h 25mDelta
Sun 1/254:10 pmICN - SEA
Nonstop9h 50mDelta
Deal found 12/15$957
This Hawaiian Airlines deal was found by Cheapflights users on 12/16. 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 Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/261:40 pmSEA - ICN
Nonstop11h 55mAlaska Airlines
Sun 1/258:35 pmICN - SEA
Nonstop10h 10mAlaska Airlines
Deal found 12/16$963
This United Airlines deal was found by Cheapflights users on 12/16. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/265:00 amSEA - ICN
1 stop18h 15mUnited Airlines
Sun 1/256:00 pmICN - SEA
1 stop23h 59mUnited Airlines
Deal found 12/16$968
This United Airlines deal was found by Cheapflights users on 12/16. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/267:05 amSEA - ICN
1 stop16h 10mUnited Airlines
Mon 1/2612:45 pmICN - SEA
2 stops20h 44mUnited Airlines
Deal found 12/16$972
This United Airlines deal was found by Cheapflights users on 12/16. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/257:12 pmSEA - ICN
1 stop17h 28mUnited Airlines
Mon 12/2912:45 pmICN - SEA
1 stop29h 14mUnited Airlines
Deal found 12/16$974
This United Airlines deal was found by Cheapflights users on 12/16. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/251:55 pmSEA - ICN
2 stops22h 45mUnited Airlines
Sat 12/276:00 pmICN - SEA
1 stop31h 23mUnited Airlines
Deal found 12/16$979
This United Airlines deal was found by Cheapflights users on 12/16. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/257:05 amSEA - ICN
1 stop16h 10mUnited Airlines
Sun 12/289:00 amICN - SEA
2 stops29h 17mUnited Airlines
Deal found 12/16$980
This United Airlines deal was found by Cheapflights users on 12/16. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/247:12 pmSEA - ICN
1 stop28h 03mUnited Airlines
Sat 12/276:00 pmICN - SEA
1 stop31h 23mUnited Airlines
Deal found 12/16$981
This United Airlines deal was found by Cheapflights users on 12/17. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/247:45 pmPDX - ICN
1 stop27h 30mUnited Airlines
Wed 12/3112:45 pmICN - PDX
2 stops38h 16mUnited Airlines
Deal found 12/17$1,272
This United Airlines deal was found by Cheapflights users on 12/18. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/265:00 amPSC - ICN
2 stops31h 40mUnited Airlines
Thu 1/86:00 pmICN - PSC
2 stops36h 46mUnited Airlines
Deal found 12/18$1,365
This United Airlines deal was found by Cheapflights users on 12/17. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/217:45 pmPDX - ICN
1 stop27h 30mUnited Airlines
Tue 12/237:25 pmICN - PDX
2 stops44h 21mUnited Airlines
Deal found 12/17$1,411

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 December 18, 2025.

Most accurate provider

Mytrip
3 stars

Most trusted provider

Mytrip
3 stars

Round-trip from

$675
(SmartFares)

One-way from

$368
(TravelUp)

Popular in

June

Cheapest in

November

Average price

$1,092

Good round-trip deal

$337 or less

Good one-way deal

$358 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. 18% potential increase in price ($236 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($41 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 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 December 18, 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

Tue 2/10

9:30 pm-6:35 pm

1 stop28h 05m

Incheon Intl

Sat 2/28

8:35 pm-7:15 pm

1 stop15h 40m

$616

PortlandIncheon

PDX - ICN

PDXICN

Portland

Wed 2/11

5:35 pm-6:35 pm

1 stop32h 00m

Incheon Intl

Fri 2/27

8:35 pm-7:15 pm

1 stop15h 40m

$616

PortlandIncheon

PDX - ICN

PDXICN

Portland

Sun 1/25

10:30 am-6:35 pm

1 stop15h 05m

Incheon Intl

Sun 2/22

8:35 pm-6:05 pm

1 stop14h 30m

$616

PortlandIncheon

PDX - ICN

PDXICN

Portland

Sat 2/7

7:38 pm-6:35 pm

1 stop29h 57m

Incheon Intl

Fri 2/27

8:35 pm-6:05 pm

1 stop14h 30m

$616

PortlandIncheon

PDX - ICN

PDXICN

Portland

Thu 2/5

10:30 am-6:35 pm

1 stop15h 05m

Incheon Intl

Sat 2/28

8:35 pm-7:15 pm

1 stop15h 40m

$616

PortlandIncheon

PDX - ICN

PDXICN

Portland

Sun 2/8

6:00 am-6:35 pm

1 stop19h 35m

Incheon Intl

Fri 2/27

8:35 pm-7:15 pm

1 stop15h 40m

$616

PortlandIncheon

PDX - ICN

PDXICN

Portland

Sun 2/8

6:00 am-6:35 pm

1 stop19h 35m

Incheon Intl

Sun 3/1

8:35 pm-10:41 pm

1 stop19h 06m

$666

PortlandIncheon

PDX - ICN

PDXICN

Portland

Fri 2/6

9:20 am-4:30 pm

1 stop14h 10m

Incheon Intl

Thu 2/26

8:05 pm-12:15 am

1 stop21h 10m

$716

PortlandIncheon

PDX - ICN

PDXICN

Portland

Sun 2/8

9:20 am-4:30 pm

1 stop14h 10m

Incheon Intl

Tue 3/3

8:05 pm-8:55 pm

1 stop17h 50m

$716

PortlandIncheon

PDX - ICN

PDXICN

Portland

Sun 2/8

7:10 am-4:30 pm

1 stop16h 20m

Incheon Intl

Wed 2/25

8:05 pm-12:15 am

1 stop21h 10m

$716

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/18

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 $803). 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 December 18, 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 at noon 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.

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 December 18, 2025.

The most flights from USWA to SEL are scheduled on a Wednesday (10 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (6 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 17h 15m. Fly via Delta, United Airlines, or Japan Airlines to get the fastest option. There are 5368 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 Alaska 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 Delta (62%), Korean Air (57%) or Thai Airways (55%) 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 $1,242, our data shows the cheapest flight currently is $188. When looking at the most popular route, (Seattle/Tacoma Intl - Incheon Intl), you can expect to pay $689 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 $803). 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 December 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$172Average$1,164FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$282Average$660FlexibilityNo cancel feeOn-time69%
Hawaiian AirlinesCheapest$282Average$884FlexibilityNo cancel feeOn-time85%
Alaska AirlinesCheapest$335Average$338FlexibilityNo cancel feeOn-time75%
Air CanadaCheapest$614Average$984FlexibilityNo cancel feeOn-time67%
Asiana AirlinesCheapest$797Average$1,062FlexibilityNo cancel feeOn-time76%
Korean AirCheapest$848Average$1,539FlexibilityNo cancel feeOn-time81%
China AirlinesCheapest$886Average$1,073FlexibilityNo cancel feeOn-time70%
EVA AirCheapest$978Average$1,089FlexibilityNo cancel feeOn-time74%
Turkish AirlinesCheapest$995Average$1,207FlexibilityNo cancel feeOn-time77%

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