HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
South Korea

$441+ Cheap flights from Washington to South Korea

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 7/5. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — ICN
Jun 4 — Jun 111
Thu 6/4
Thu 6/11
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Washington to South Korea with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Washington to South Korea

Cheapest flights from Washington to South Korea
Explore the most affordable flight options available from Washington to South Korea. Find the lowest fares from popular airlines and budget airlines, with prices last updated on May 5, 2026.

This FlightHub deal was found by Cheapflights users on 5/3. 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.
Sun 5/312:10 am
SEA
-
ICN
Nonstop12h 20m
Asiana Airlines
Fri 5/159:20 pm
ICN
-
SEA
Nonstop9h 55m
Asiana Airlines
Deal found 5/3$806
This CrystalTravel deal was found by Cheapflights users on 4/30. 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 CrystalTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/2812:10 am
SEA
-
ICN
Nonstop11h 50m
Asiana Airlines
Fri 8/289:20 pm
ICN
-
SEA
Nonstop10h 25m
Asiana Airlines
Deal found 4/30$819
This Gotogate deal was found by Cheapflights users on 5/2. 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.
Tue 5/512:10 am
SEA
-
ICN
Nonstop12h 20m
Asiana Airlines
Thu 5/79:20 pm
ICN
-
SEA
Nonstop9h 55m
Asiana Airlines
Deal found 5/2$821
This Alaska Airlines deal was found by Cheapflights users on 4/30. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/41:40 pm
SEA
-
ICN
Nonstop11h 50m
Alaska Airlines
Mon 5/187:35 pm
ICN
-
SEA
Nonstop10h 00m
Alaska Airlines
Deal found 4/30$824
This Asiana Airlines deal was found by Cheapflights users on 5/2. 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 Asiana Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/512:10 am
SEA
-
ICN
Nonstop12h 20m
Asiana Airlines
Thu 5/149:20 pm
ICN
-
SEA
Nonstop9h 55m
Asiana Airlines
Deal found 5/2$826
This Delta deal was found by Cheapflights users on 5/1. 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.
Wed 5/67:00 am
SEA
-
ICN
1 stop18h 20m
Delta
Wed 5/134:40 pm
ICN
-
SEA
Nonstop10h 00m
Delta
Deal found 5/1$828
This WhyPayMore deal was found by Cheapflights users on 4/30. 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 WhyPayMore is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/2812:10 am
SEA
-
ICN
Nonstop11h 50m
Asiana Airlines
Thu 9/39:20 pm
ICN
-
SEA
Nonstop9h 55m
Asiana Airlines
Deal found 4/30$829
This WhyPayMore deal was found by Cheapflights users on 4/30. 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 WhyPayMore is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/297:20 am
SEA
-
ICN
1 stop18h 00m
Korean Air
Thu 9/37:00 pm
ICN
-
SEA
Nonstop10h 37m
Korean Air
Deal found 4/30$833
This Delta deal was found by Cheapflights users on 5/1. 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 5/27:00 am
SEA
-
ICN
1 stop18h 20m
Delta
Tue 5/124:00 pm
ICN
-
SEA
1 stop22h 55m
Delta
Deal found 5/1$838
This Delta deal was found by Cheapflights users on 4/30. 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.
Fri 5/17:00 am
SEA
-
ICN
1 stop18h 20m
Delta
Thu 5/144:00 pm
ICN
-
SEA
1 stop16h 01m
Delta
Deal found 4/30$839
This Delta deal was found by Cheapflights users on 4/30. 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.
Mon 5/41:00 pm
SEA
-
ICN
Nonstop11h 50m
Delta
Tue 7/1412:45 pm
ICN
-
SEA
1 stop33h 15m
Delta
Deal found 4/30$840
This Alaska Airlines deal was found by Cheapflights users on 5/1. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/31:52 pm
PDX
-
ICN
1 stop35h 38m
Alaska Airlines
Mon 5/187:35 pm
ICN
-
PDX
1 stop17h 53m
Alaska Airlines
Deal found 5/1$944

Find flight deals from Washington to South Korea

Keep the following information in mind while searching for Washington to South Korea flight deals. Data was last updated May 5, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$819
(CrystalTravel)

One-way from

$441
(Delta)

Popular in

July

Cheapest in

November

Average price

$886

Good round-trip deal

$781 or less

Good one-way deal

$421 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 South Korea
Search Deals
One-way flight from Washington to South Korea
Search Deals
Highest demand for flights based on searches. 12% potential increase in price ($139 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($23 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in May 2026
Search Deals
Price to beat on a round-trip flight from Washington to South Korea.
Search Deals
Price to beat on a one-way flight from Washington to South Korea.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Washington to South Korea 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 May 5, 2026.
Use the filters below to find and compare flights from Washington to South Korea that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Tue 7/28

7:20 am-5:20 pm

1 stop18h 00m

Incheon Intl

Wed 8/5

7:00 pm-1:37 pm

Nonstop10h 37m

$1,039

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Thu 7/23

7:20 am-5:20 pm

1 stop18h 00m

Incheon Intl

Fri 8/14

4:40 pm-11:00 am

Nonstop10h 20m

$1,039

SeattleBusan

SEA - PUS

SEAPUS

Seattle/Tacoma Intl

Sun 10/18

1:15 am-9:30 am

1 stop16h 15m

Busan Gimhae

Thu 11/5

11:50 am-6:10 pm

1 stop23h 20m

$1,079

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Tue 7/7

7:20 am-5:20 pm

1 stop18h 00m

Incheon Intl

Wed 9/2

4:00 pm-3:24 pm

1 stop15h 24m

$1,148

SeattleBusan

SEA - PUS

SEAPUS

Seattle/Tacoma Intl

Mon 10/19

5:55 pm-9:30 am

2 stops23h 35m

Busan Gimhae

Thu 11/5

11:50 am-6:10 pm

1 stop23h 20m

$1,177

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Wed 7/8

7:05 pm-4:20 am

1 stop17h 15m

Incheon Intl

Wed 7/22

4:50 pm-1:13 am

1 stop24h 23m

$1,179

SpokaneIncheon

GEG - ICN

GEGICN

Spokane

Sat 8/1

6:20 am-4:00 am

1 stop29h 40m

Incheon Intl

Sat 8/15

9:40 pm-10:15 pm

1 stop16h 35m

$1,184

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Fri 7/10

5:04 pm-4:20 am

2 stops19h 16m

Incheon Intl

Wed 7/22

4:50 pm-1:13 am

1 stop24h 23m

$1,184

SeattleBusan

SEA - PUS

SEAPUS

Seattle/Tacoma Intl

Mon 7/6

1:05 pm-7:35 pm

1 stop14h 30m

Busan Gimhae

Mon 7/13

8:45 am-11:00 am

1 stop18h 15m

$1,185

SpokaneIncheon

GEG - ICN

GEGICN

Spokane

Sat 8/1

6:20 am-4:00 am

1 stop29h 40m

Incheon Intl

Sat 8/15

12:40 pm-10:15 pm

1 stop25h 35m

$1,186

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/4

Showing 1-10 of 60 resultsSorted by cheapest first
1
2
3
...
6

Best time to book a flight from Washington to South Korea

Have a flexible travel schedule? Discover the best time to fly to South Korea 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 South Korea

How far ahead should I book a flight from State of Washington to South Korea?

The price you pay for your flight from State of Washington to South Korea may vary depending on when you book. For the best chance of a lower fare, look to book 68 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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

Currently, January is the cheapest month in which you can book a flight from State of Washington to South Korea (average of $333). Flying from State of Washington to South Korea in September is currently the most expensive (average of $1,354). 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 KR?

Find hourly flight availability from Washington to South Korea. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated May 5, 2026.

It’s optimal to fly from State of Washington to South Korea in the evening. By choosing this option you can save up to 27% on the cost of your flight, compared to a flight in the afternoon.

Weekly flight availability from State of Washington to South Korea

Explore weekly flight availability from Washington to South Korea. 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 May 5, 2026.

The most flights from USWA to KR0 are scheduled on a Monday (9 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (5 on average).

Related info for your journey

Find useful and relevant information for your journey from Washington to South Korea. 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 South Korea?

    Korean Air, China Airlines, and United Airlines can get you from State of Washington to South Korea in just under 16h 15m. Your travel time can differ by up to 1h 45m. State of Washington and South Korea are separated by a distance of 5228 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

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

    The cheapest airlines for a one-way flight from State of Washington to South Korea are Hawaiian Airlines ($160), Alaska Airlines ($168), and Korean Air ($319).

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

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

  • How can I find direct flights from Washington to South Korea?

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

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

    Yes. Cheapflights offers flight deals from Washington to South Korea 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 South Korea?

    Currently, January is the cheapest month in which you can book a flight from State of Washington to South Korea (average of $333). Flying from State of Washington to South Korea in September is currently the most expensive (average of $1,354). 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

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Washington to South Korea

See prices for flight routes from nearby airports that may be better suited for you.
Los Angeles to Haneda flights
Los Angeles to Narita flights
John F Kennedy Intl to Haneda flights
Newark to Haneda flights
Newark to Narita flights
San Francisco to Haneda flights
Seattle to Narita flights
John F Kennedy Intl to Narita flights
Seattle to Haneda flights
Los Angeles to Manila flights
Los Angeles to Suvarnabhumi flights
San Francisco to Manila flights
San Francisco to Narita flights
Dallas/Fort Worth to Narita flights
O'Hare Intl to Haneda flights
O'Hare Intl to Narita flights
Dulles Intl to Haneda flights
Dallas/Fort Worth to Haneda flights
LaGuardia to Haneda flights
John F Kennedy Intl to Suvarnabhumi flights
John F Kennedy Intl to Incheon Intl flights
Los Angeles to Incheon Intl flights
John F Kennedy Intl to New Delhi flights
Los Angeles to Ho Chi Minh City flights
San Francisco to Taiwan Taoyuan Intl flights
Boston to Narita flights
John F Kennedy Intl to Hong Kong flights
Newark to New Delhi flights
Hobby to Narita flights
George Bush Intcntl to Haneda flights
Seattle to Suvarnabhumi flights
Ontario to Narita flights
John F Kennedy Intl to Mumbai flights
Atlanta to Haneda flights
Honolulu to Haneda flights
San Francisco to Ho Chi Minh City flights
Newark to Suvarnabhumi flights
San Francisco to Hong Kong flights
Dulles Intl to Narita flights
George Bush Intcntl to Narita flights
Seattle to Taiwan Taoyuan Intl flights
Seattle to Pu Dong flights
San Francisco to Suvarnabhumi flights

Top 9 airlines flying from Washington to South Korea

Discover the top 9 airlines that operate flights from Washington to South Korea. 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 May 5, 2026.
AirlineCheapestAverageFlexibilityOn-time
Hawaiian AirlinesCheapest$282Average$829FlexibilityNo cancel feeOn-time85%
Alaska AirlinesCheapest$335Average$641FlexibilityNo cancel feeOn-time75%
Alaska AirlinesCheapest$518Average$885FlexibilityNo cancel feeOn-timeN/A
Air CanadaCheapest$524Average$809FlexibilityNo cancel feeOn-time67%
Asiana AirlinesCheapest$773Average$883FlexibilityNo cancel feeOn-time76%
DeltaCheapest$840Average$1,403FlexibilityNo cancel feeOn-timeN/A
Korean AirCheapest$842Average$1,126FlexibilityNo cancel feeOn-time81%
China AirlinesCheapest$897Average$1,302FlexibilityNo cancel feeOn-time70%
EVA AirCheapest$1,019Average$1,102FlexibilityNo cancel feeOn-time74%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.