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$362+ 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 8/1. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — ICN
Jul 21 — Jul 281
Tue 7/21
Tue 7/28
1 adult, Economy
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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 June 21, 2026.

This Gotogate deal was found by Cheapflights users on 6/20. 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 8/182:30 pm
PDX
-
ICN
1 stop36h 15m
WestJet
Tue 9/228:45 pm
ICN
-
PDX
1 stop33h 05m
WestJet
Deal found 6/20$838
This Gotogate deal was found by Cheapflights users on 6/19. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/217:35 pm
SEA
-
ICN
1 stop31h 10m
WestJet
Sat 9/198:45 pm
ICN
-
SEA
1 stop28h 55m
WestJet
Deal found 6/19$879
This WestJet deal was found by Cheapflights users on 6/19. 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 WestJet is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/297:35 pm
SEA
-
ICN
1 stop31h 10m
WestJet
Sun 9/138:45 pm
ICN
-
SEA
1 stop28h 55m
WestJet
Deal found 6/19$882
This WestJet deal was found by Cheapflights users on 6/18. 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 WestJet is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/3010:30 am
SEA
-
ICN
1 stop16h 15m
WestJet
Mon 9/148:45 pm
ICN
-
SEA
1 stop28h 55m
WestJet
Deal found 6/18$883
This KAYAK deal was found by Cheapflights users on 6/19. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/2610:30 am
SEA
-
ICN
1 stop16h 15m
WestJet
Tue 9/158:45 pm
ICN
-
SEA
2 stops26h 50m
WestJet
Deal found 6/19$884
This WestJet deal was found by Cheapflights users on 6/19. 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 WestJet is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/297:35 pm
SEA
-
ICN
1 stop31h 10m
WestJet
Tue 9/158:45 pm
ICN
-
SEA
2 stops26h 50m
WestJet
Deal found 6/19$886
This WestJet deal was found by Cheapflights users on 6/18. 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 WestJet is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/297:00 am
SEA
-
ICN
1 stop19h 45m
WestJet
Mon 9/148:45 pm
ICN
-
SEA
2 stops26h 50m
WestJet
Deal found 6/18$887
This FlightHub deal was found by Cheapflights users on 6/18. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/307:00 am
SEA
-
ICN
1 stop19h 45m
WestJet
Sat 9/128:45 pm
ICN
-
SEA
1 stop28h 55m
WestJet
Deal found 6/18$891
This KAYAK deal was found by Cheapflights users on 6/16. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/1011:55 am
SEA
-
ICN
2 stops40h 30m
Hainan Airlines
Wed 11/119:40 pm
ICN
-
SEA
2 stops27h 25m
Hainan Airlines
Deal found 6/16$900
This WestJet deal was found by Cheapflights users on 6/16. 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 WestJet is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/3110:30 am
SEA
-
ICN
1 stop16h 15m
WestJet
Sun 9/138:45 pm
ICN
-
SEA
2 stops38h 10m
WestJet
Deal found 6/16$909
This Gotogate deal was found by Cheapflights users on 6/19. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/43:10 pm
SEA
-
ICN
1 stop33h 35m
Multiple Airlines
Sun 1/178:30 pm
ICN
-
SEA
1 stop39h 05m
Multiple Airlines
Deal found 6/19$912
This Ovago deal was found by Cheapflights users on 6/20. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/272:30 pm
PDX
-
ICN
1 stop36h 15m
WestJet
Sat 10/108:45 pm
ICN
-
PDX
1 stop33h 05m
WestJet
Deal found 6/20$923

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 June 21, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$838
(Gotogate)

One-way from

$362
(oojo)

Popular in

December

Cheapest in

November

Average price

$1,120

Good round-trip deal

$885 or less

Good one-way deal

$564 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. 1% potential increase in price ($16 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($21 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 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 June 21, 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

SpokaneIncheon

GEG - ICN

GEGICN

Spokane

Tue 9/8

6:22 am-11:55 am

2 stops37h 33m

Incheon Intl

Tue 11/10

8:55 am-9:37 pm

2 stops29h 42m

$991

PortlandIncheon

PDX - ICN

PDXICN

Portland

Thu 9/10

9:35 pm-5:30 pm

2 stops27h 55m

Incheon Intl

Wed 9/16

7:35 pm-8:50 pm

2 stops17h 15m

$1,060

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Tue 10/13

11:45 am-7:05 pm

1 stop39h 20m

Incheon Intl

Fri 11/13

1:45 pm-9:10 am

1 stop36h 25m

$1,089

SeattleBusan

SEA - PUS

SEAPUS

Seattle/Tacoma Intl

Fri 7/17

12:10 am-7:45 am

1 stop15h 35m

Busan Gimhae

Fri 7/24

7:00 am-3:45 pm

1 stop24h 45m

$1,116

SeattleBusan

SEA - PUS

SEAPUS

Seattle/Tacoma Intl

Tue 9/1

1:55 am-11:15 am

1 stop17h 20m

Busan Gimhae

Tue 9/15

10:30 am-7:45 pm

1 stop25h 15m

$1,118

SeattleBusan

SEA - PUS

SEAPUS

Seattle/Tacoma Intl

Sun 8/30

1:55 am-9:30 am

1 stop15h 35m

Busan Gimhae

Mon 9/14

8:00 pm-7:45 pm

1 stop15h 45m

$1,118

SeattleBusan

SEA - PUS

SEAPUS

Seattle/Tacoma Intl

Sat 8/29

1:55 am-11:15 am

1 stop17h 20m

Busan Gimhae

Thu 9/17

12:15 pm-7:15 pm

1 stop23h 00m

$1,118
Quickest round-trip

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Wed 7/22

1:05 pm-4:50 pm

Nonstop11h 45m

Incheon Intl

Fri 7/31

7:00 pm-1:41 pm

Nonstop10h 41m

$1,131

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Sat 7/18

5:00 am-3:00 pm

1 stop18h 00m

Incheon Intl

Wed 7/29

11:30 am-7:03 pm

2 stops23h 33m

$1,158

SeattleBusan

SEA - PUS

SEAPUS

Seattle/Tacoma Intl

Sat 8/15

2:10 am-11:35 am

1 stop17h 25m

Busan Gimhae

Wed 9/2

7:10 pm-7:40 pm

1 stop16h 30m

$1,167

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/16

Showing 1-10 of 60 resultsSorted by cheapest first
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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

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 May is currently the most expensive (average of $6,143). 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 June 21, 2026.

It’s optimal to fly from State of Washington to South Korea at noon. By choosing this option you can save up to 32% 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 June 21, 2026.

The most flights from USWA to KR0 are scheduled on a Friday (9 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (4 on average).

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.

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?

    China Eastern, Alaska Airlines, and Cathay Pacific can get you from State of Washington to South Korea in just under 27h 55m. Your travel time can differ by up to 11h 25m. State of Washington and South Korea are separated by a distance of 5273 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 Delta ($324).

  • 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 May is currently the most expensive (average of $6,143). 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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Top 7 airlines flying from Washington to South Korea

Discover the top 7 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 June 21, 2026.
AirlineCheapestAverageFlexibilityOn-time
Hawaiian AirlinesCheapest$160Average$829FlexibilityNo cancel feeOn-time85%
Alaska AirlinesCheapest$335Average$641FlexibilityNo cancel feeOn-time75%
Air CanadaCheapest$524Average$795FlexibilityNo cancel feeOn-time67%
Asiana AirlinesCheapest$798Average$883FlexibilityNo cancel feeOn-time76%
DeltaCheapest$838Average$1,491FlexibilityNo cancel feeOn-timeN/A
Korean AirCheapest$843Average$1,000FlexibilityNo cancel feeOn-time81%
EVA AirCheapest$1,019Average$1,102FlexibilityNo cancel feeOn-time74%

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