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$393+ 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 9/24. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — ICN
jun. 17 — jun. 241
mar. 6/17
mar. 6/24
1 adult, Economy
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Cheap 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 junio 12, 2025.

Round-trip from

$921
(Mytrip)

One-way from

$400
(Kiwi.com)

Popular in

June

Cheapest in

February

Average price

$1,530

Good round-trip deal

$786 or less

Good one-way deal

$454 or less
From Washington to South Korea
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One-way flight from Washington to South Korea
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Highest demand for flights based on searches. 10% potential increase in price ($146 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($31 potential savings vs. average RT price).
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Average for round-trip flights in June 2025
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Price to beat on a round-trip flight from Washington to South Korea.
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Price to beat on a one-way flight from Washington to South Korea.
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Find 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 junio 12, 2025.

This Mytrip deal was found by Cheapflights users on 6/11. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 9/155:30 amSEA - ICN
3 stops31h 00mMultiple Airlines
lun. 9/222:50 pmICN - SEA
2 stops19h 46mMultiple Airlines
Deal found 6/11$918
This oojo deal was found by Cheapflights users on 6/11. 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.
mar. 9/161:10 amSEA - ICN
1 stop26h 25mChina Airlines
sáb. 9/278:35 pmICN - SEA
1 stop14h 45mChina Airlines
Deal found 6/11$920
This FlightHub deal was found by Cheapflights users on 6/12. 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.
vie. 8/227:10 amSEA - ICN
2 stops36h 45mChina Eastern
mar. 9/24:20 pmICN - SEA
2 stops40h 34mChina Eastern
Deal found 6/12$924
This FlightHub deal was found by Cheapflights users on 6/10. 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.
lun. 9/17:10 amSEA - GMP
2 stops35h 50mChina Eastern
lun. 9/88:50 pmGMP - SEA
2 stops36h 09mChina Eastern
Deal found 6/10$924
This Air Canada deal was found by Cheapflights users on 6/12. 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.
sáb. 10/182:55 pmSEA - ICN
1 stop33h 10mAir Canada
mié. 10/295:50 pmICN - SEA
1 stop31h 26mAir Canada
Deal found 6/12$927
This Gotogate deal was found by Cheapflights users on 6/11. 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.
vie. 9/2612:50 pmSEA - ICN
Nonstop11h 50mKorean Air
vie. 10/244:40 pmICN - SEA
Nonstop10h 00mKorean Air
Deal found 6/11$949
This FlightHub deal was found by Cheapflights users on 6/12. 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.
lun. 10/202:15 pmSEA - ICN
Nonstop11h 40mAsiana Airlines
sáb. 11/19:00 pmICN - SEA
Nonstop9h 55mAsiana Airlines
Deal found 6/12$961
This oojo deal was found by Cheapflights users on 6/9. 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.
mar. 8/52:30 pmSEA - PUS
2 stops52h 00mAsiana Airlines
jue. 8/2810:50 amPUS - SEA
2 stops41h 55mAsiana Airlines
Deal found 6/9$966
This Kiwi.com deal was found by Cheapflights users on 6/10. 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.
sáb. 9/64:03 pmPSC - ICN
2 stops34h 42mMultiple Airlines
sáb. 9/1312:45 pmICN - PSC
1 stop27h 10mMultiple Airlines
Deal found 6/10$976
This Delta deal was found by Cheapflights users on 6/12. 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.
mar. 10/219:10 amGEG - ICN
1 stop15h 20mDelta
dom. 11/28:05 pmICN - GEG
1 stop13h 52mDelta
Deal found 6/12$976
This oojo deal was found by Cheapflights users on 6/12. 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.
mié. 9/241:30 amSEA - ICN
1 stop17h 30mEVA Air
jue. 10/1612:00 pmICN - SEA
1 stop22h 50mEVA Air
Deal found 6/12$979
This Gotogate deal was found by Cheapflights users on 6/11. 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.
lun. 9/224:30 pmSEA - GMP
1 stop26h 35mANA
lun. 10/1312:40 pmGMP - SEA
1 stop17h 45mANA
Deal found 6/11$981

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 junio 12, 2025.
Use the filters below to find and compare flights from Washington to South Korea that are best for you.

Fly from

Washington

Fly to

South Korea

Route

Depart

Return

Price

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

lun. 9/15

5:30 am-4:30 am

3 stops31h 00m

Incheon Intl

lun. 9/22

2:50 pm-6:36 pm

2 stops19h 46m

$918

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

mar. 9/16

1:10 am-7:35 pm

1 stop26h 25m

Incheon Intl

sáb. 9/27

8:35 pm-7:20 pm

1 stop14h 45m

$920

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

vie. 8/22

7:10 am-11:55 am

2 stops36h 45m

Incheon Intl

mar. 9/2

4:20 pm-4:54 pm

2 stops40h 34m

$924

SeattleSeoul

SEA - GMP

SEAGMP

Seattle/Tacoma Intl

lun. 9/1

7:10 am-11:00 am

2 stops35h 50m

Seoul Gimpo Intl

lun. 9/8

8:50 pm-4:59 pm

2 stops36h 09m

$924

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

sáb. 10/18

2:55 pm-4:05 pm

1 stop33h 10m

Incheon Intl

jue. 10/30

5:50 pm-2:26 pm

1 stop12h 36m

$927

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

vie. 9/26

12:50 pm-4:40 pm

Nonstop11h 50m

Incheon Intl

vie. 10/24

4:40 pm-10:40 am

Nonstop10h 00m

$949

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

lun. 10/20

2:15 pm-5:55 pm

Nonstop11h 40m

Incheon Intl

sáb. 11/1

9:00 pm-2:55 pm

Nonstop9h 55m

$961

SeattleBusan

SEA - PUS

SEAPUS

Seattle/Tacoma Intl

mar. 8/5

2:30 pm-10:30 am

2 stops52h 00m

Busan Gimhae

jue. 8/28

10:50 am-12:45 pm

2 stops41h 55m

$966

SpokaneIncheon

GEG - ICN

GEGICN

Spokane

mar. 10/21

9:10 am-4:30 pm

1 stop15h 20m

Incheon Intl

dom. 11/2

8:05 pm-4:57 pm

1 stop13h 52m

$976

PascoIncheon

PSC - ICN

PSCICN

Pasco Tri Cities

sáb. 9/6

4:03 pm-6:45 pm

2 stops34h 42m

Incheon Intl

sáb. 9/13

12:45 pm-11:55 pm

1 stop27h 10m

$976

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/11

Showing 1-10 of 60 results
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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, February is the cheapest month in which you can book a flight from State of Washington to South Korea (average of $1,000). Flying from State of Washington to South Korea in December is currently the most expensive (average of $1,635). 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 junio 12, 2025.

When flying from State of Washington to South Korea, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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 junio 12, 2025.

The most flights from USWA to KR0 are scheduled on a Monday (8 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (8 on average).

Rainfall in South Korea by month

Plan your trip to South Korea by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in South Korea ranges from 0.8 - 10.2 inches per month. July is typically the wettest month, when rainfall can reach 10.2 in. January is typically the driest time to visit South Korea when rainfall is around 0.8 in.

Temperature in South Korea by month

Plan your trip to South Korea by taking into account the average temperature totals by month.

If weather is an important factor for your trip to South Korea, use this chart to help with planning. For those seeking warmer temperatures, August is the ideal time of year to visit, when temperatures reach an average of 77.0 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 28.4 F).

Reviews of airlines servicing South Korea

Get insights into the airlines that provide service to South Korea. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to South Korea. Reviews last updated junio 12, 2025.
See what other customers who have flown with EVA Air, Korean Air and Japan Airlines from Washington to South Korea have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
EVA Air
8.4
Very good
1,202 reviews

Food

8.1

Overall

8.4

Comfort

8.3

Entertainment

8.0

Boarding

8.4

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount
EVA Air
8.4
Very good
1,202 reviews
EVA Air
8.4
Very good
1,202 reviews

Food

8.1

Overall

8.4

Comfort

8.3

Entertainment

8.0

Boarding

8.4

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount
Korean Air
8.4
Very good
1,088 reviews
EVA Air
8.4
Very good
1,202 reviews

Food

8.1

Overall

8.4

Comfort

8.3

Entertainment

8.0

Boarding

8.4

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount
Japan Airlines
8.3
Very good
1,489 reviews
EVA Air
8.4
Very good
1,202 reviews

Food

8.1

Overall

8.4

Comfort

8.3

Entertainment

8.0

Boarding

8.4

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount
China Airlines
8.3
Very good
738 reviews
EVA Air
8.4
Very good
1,202 reviews

Food

8.1

Overall

8.4

Comfort

8.3

Entertainment

8.0

Boarding

8.4

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount
ANA
8.3
Very good
882 reviews
EVA Air
8.4
Very good
1,202 reviews

Food

8.1

Overall

8.4

Comfort

8.3

Entertainment

8.0

Boarding

8.4

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount

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 popular is this State of Washington to South Korea flight route?

    The Washington to South Korea flight path was viewed by 200 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

  • 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 WestJet ($406), Japan Airlines ($415), and Delta ($433).

  • 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, February is the cheapest month in which you can book a flight from State of Washington to South Korea (average of $1,000). Flying from State of Washington to South Korea in December is currently the most expensive (average of $1,635). 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 10 airlines flying from Washington to South Korea

Discover the top 10 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 junio 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
Alaska AirlinesCheapest$164Average$1,295FlexibilityNo cancel feeOn-time75%
DeltaCheapest$167Average$1,350FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$657Average$865FlexibilityNo cancel feeOn-time69%
Hawaiian AirlinesCheapest$698Average$1,315FlexibilityNo cancel feeOn-time85%
Air CanadaCheapest$823Average$950FlexibilityNo cancel feeOn-time67%
China AirlinesCheapest$835Average$1,053FlexibilityNo cancel feeOn-time70%
Asiana AirlinesCheapest$910Average$1,201FlexibilityNo cancel feeOn-time76%
Korean AirCheapest$966Average$1,505FlexibilityNo cancel feeOn-time81%
Turkish AirlinesCheapest$970Average$1,205FlexibilityNo cancel feeOn-time77%
EVA AirCheapest$978Average$1,089FlexibilityNo cancel feeOn-time74%

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