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$493+ Cheap flights from Seoul (SEL) to Washington

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 6/5. Fares are subject to change and may not be available on all flights or dates of travel.
SEL — SEA
Jun 22 — Jun 291
Mon 6/22
Mon 6/29
1 adult, Economy
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Cheap flight deals from Seoul to Washington

Cheapest flights from Seoul to Washington
Explore the most affordable flight options available from Seoul to Washington. Find the lowest fares from popular airlines and budget airlines, with prices last updated on May 23, 2026.

This Expedia deal was found by Cheapflights users on 5/20. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/17:35 pm
ICN
-
SEA
Nonstop10h 00m
Multiple Airlines
Wed 8/267:00 am
SEA
-
ICN
1 stop19h 45m
Multiple Airlines
Deal found 5/20$943
This Ticket deal was found by Cheapflights users on 5/19. 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 Ticket is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/37:35 pm
ICN
-
SEA
Nonstop10h 00m
Alaska Airlines
Wed 8/122:05 pm
SEA
-
ICN
Nonstop11h 25m
Alaska Airlines
Deal found 5/19$958
This WhyPayMore deal was found by Cheapflights users on 5/19. 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 WhyPayMore is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/197:35 pm
ICN
-
SEA
Nonstop10h 30m
Multiple Airlines
Sun 7/2612:10 am
SEA
-
ICN
Nonstop11h 50m
Multiple Airlines
Deal found 5/19$982
This Kiwi.com deal was found by Cheapflights users on 5/20. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/188:45 pm
ICN
-
SEA
3 stops26h 22m
Multiple Airlines
Tue 7/2112:10 am
SEA
-
ICN
Nonstop11h 50m
Multiple Airlines
Deal found 5/20$983
This Kiwi.com deal was found by Cheapflights users on 5/20. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/188:45 pm
ICN
-
SEA
3 stops26h 22m
Multiple Airlines
Sun 7/1912:10 am
SEA
-
ICN
Nonstop11h 50m
Multiple Airlines
Deal found 5/20$985
This Kiwi.com deal was found by Cheapflights users on 5/20. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/257:35 pm
ICN
-
SEA
Nonstop10h 30m
Multiple Airlines
Tue 7/2112:10 am
SEA
-
ICN
Nonstop11h 50m
Multiple Airlines
Deal found 5/20$991
This Kiwi.com deal was found by Cheapflights users on 5/20. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/257:35 pm
ICN
-
SEA
Nonstop10h 30m
Multiple Airlines
Mon 7/2012:10 am
SEA
-
ICN
Nonstop11h 50m
Multiple Airlines
Deal found 5/20$992
This Kiwi.com deal was found by Cheapflights users on 5/20. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/188:45 pm
ICN
-
SEA
3 stops26h 22m
Multiple Airlines
Thu 7/2312:10 am
SEA
-
ICN
Nonstop11h 50m
Multiple Airlines
Deal found 5/20$997
This Kiwi.com deal was found by Cheapflights users on 5/20. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/257:35 pm
ICN
-
SEA
Nonstop10h 30m
Multiple Airlines
Fri 7/2412:10 am
SEA
-
ICN
Nonstop11h 50m
Multiple Airlines
Deal found 5/20$998
This Kiwi.com deal was found by Cheapflights users on 5/18. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/227:35 pm
ICN
-
SEA
Nonstop10h 30m
Multiple Airlines
Mon 7/2012:10 am
SEA
-
ICN
Nonstop11h 50m
Multiple Airlines
Deal found 5/18$999
This Flysmarter deal was found by Cheapflights users on 5/19. 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 Flysmarter is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/227:35 pm
ICN
-
SEA
Nonstop10h 30m
Multiple Airlines
Wed 7/85:15 am
SEA
-
ICN
1 stop17h 45m
Multiple Airlines
Deal found 5/19$1,000
This Kiwi.com deal was found by Cheapflights users on 5/20. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/261:50 pm
ICN
-
PDX
2 stops32h 30m
Multiple Airlines
Wed 7/87:19 am
PDX
-
ICN
1 stop20h 51m
Multiple Airlines
Deal found 5/20$1,053

Find flight deals from Seoul to Washington

Keep the following information in mind while searching for Seoul to Washington flight deals. Data was last updated May 23, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$943
(Expedia)

One-way from

$493
(Alaska Airlines)

Popular in

August

Cheapest in

November

Average price

$702

Good round-trip deal

$996 or less

Good one-way deal

$636 or less
Provider with most accurate pricing for Seoul (SEL)-Seattle/Tacoma Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Seoul (SEL)-Seattle/Tacoma Intl flights.
Search Deals
From Seoul (SEL) to Washington
Search Deals
One-way flight from Seoul (SEL) to Washington
Search Deals
Highest demand for flights based on searches. 7% potential increase in price ($59 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($18 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 Seoul (SEL) to Washington.
Search Deals
Price to beat on a one-way flight from Seoul (SEL) to Washington.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Seoul to Washington 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 23, 2026.
Use the filters below to find and compare flights from Seoul to Washington that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

IncheonSeattle

ICN - SEA

ICNSEA

Incheon Intl

Tue 6/2

4:50 pm-7:18 pm

2 stops18h 28m

Seattle/Tacoma Intl

Tue 7/7

5:04 pm-4:20 am

2 stops19h 16m

$1,039

IncheonSeattle

ICN - SEA

ICNSEA

Incheon Intl

Thu 5/28

4:50 pm-4:20 pm

1 stop15h 30m

Seattle/Tacoma Intl

Wed 7/29

8:45 am-4:20 am

1 stop27h 35m

$1,043

SeoulSeattle

GMP - SEA

GMPSEA

Seoul Gimpo Intl

Wed 6/3

7:55 pm-2:25 pm

1 stop34h 30m

Seattle/Tacoma Intl

Wed 8/12

10:45 am-6:35 pm

2 stops39h 50m

$1,100

IncheonSeattle

ICN - SEA

ICNSEA

Incheon Intl

Wed 8/19

1:20 am-12:25 pm

1 stop27h 05m

Seattle/Tacoma Intl

Tue 8/25

4:25 pm-5:05 pm

1 stop32h 40m

$1,120

SeoulSeattle

GMP - SEA

GMPSEA

Seoul Gimpo Intl

Wed 6/24

7:55 pm-2:25 pm

1 stop34h 30m

Seattle/Tacoma Intl

Tue 7/21

4:30 pm-6:35 pm

1 stop34h 05m

$1,120

IncheonSeattle

ICN - SEA

ICNSEA

Incheon Intl

Fri 6/12

11:45 pm-2:45 pm

1 stop31h 00m

Seattle/Tacoma Intl

Wed 6/17

4:25 pm-10:30 am

1 stop26h 05m

$1,137

IncheonSeattle

ICN - SEA

ICNSEA

Incheon Intl

Tue 6/23

1:20 am-12:25 pm

1 stop27h 05m

Seattle/Tacoma Intl

Thu 9/17

10:47 am-5:05 pm

2 stops38h 18m

$1,138

IncheonSeattle

ICN - SEA

ICNSEA

Incheon Intl

Wed 7/1

1:20 am-12:25 pm

1 stop27h 05m

Seattle/Tacoma Intl

Sat 7/11

4:25 pm-5:05 pm

1 stop32h 40m

$1,156

IncheonSeattle

ICN - SEA

ICNSEA

Incheon Intl

Wed 6/3

4:10 pm-6:00 am

1 stop29h 50m

Seattle/Tacoma Intl

Sun 6/21

1:05 pm-4:50 pm

Nonstop11h 45m

$1,161

IncheonSeattle

ICN - SEA

ICNSEA

Incheon Intl

Tue 6/23

1:20 am-12:25 pm

1 stop27h 05m

Seattle/Tacoma Intl

Wed 7/22

8:42 pm-5:05 pm

2 stops52h 23m

$1,166

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/20

Showing 1-10 of 60 resultsSorted by cheapest first
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Best time to book a flight from Seoul to Washington

Have a flexible travel schedule? Discover the best time to fly to Washington from Seoul 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 Seoul to Washington

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

Currently, August is the cheapest month in which you can book a flight from Seoul to State of Washington (average of $143). Flying from Seoul to State of Washington in October is currently the most expensive (average of $960). 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 SEL to WA?

Find hourly flight availability from Seoul to Washington. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated May 23, 2026.

When flying from Seoul to State of Washington, 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 Seoul to State of Washington

Explore weekly flight availability from Seoul to Washington. 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 23, 2026.

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

How much does it cost to fly round-trip from Seoul to State of Washington?

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

Booking 9 days in advance of your planned departure date is, on average, the best time to get cheap flights from Seoul to State of Washington. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

Reviews of airlines servicing Washington

Get insights into the airlines that provide service to Washington. 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 Washington. Reviews last updated May 23, 2026.
Peruse reviews from past customers who have flown with Korean Air,Asiana Airlines, andAlaska Airlines from Seoul to Washington to help guide your decision. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Korean Air
8.4
Very good
1,217 reviews

Comfort

8.3

Entertainment

8.2

Food

8.1

Boarding

8.5

Overall

8.4

Crew

8.7

Reviews

1 / 20
10.0
Excellent

Jacqueline,Aug 2025

ICN - SEA

Well, I was upset at first because I have a special diet and I need to order vegetarian and I couldn’t do it before the trip, but the stewardess were so nice and they gave me sandwiches that were plant-based which I loved!!
Korean Air
8.4
Very good
1,217 reviews
Korean Air
8.4
Very good
1,217 reviews

Comfort

8.3

Entertainment

8.2

Food

8.1

Boarding

8.5

Overall

8.4

Crew

8.7

Reviews

1 / 20
10.0
Excellent

Jacqueline,Aug 2025

ICN - SEA

Well, I was upset at first because I have a special diet and I need to order vegetarian and I couldn’t do it before the trip, but the stewardess were so nice and they gave me sandwiches that were plant-based which I loved!!
Asiana Airlines
8.1
Very good
534 reviews
Korean Air
8.4
Very good
1,217 reviews

Comfort

8.3

Entertainment

8.2

Food

8.1

Boarding

8.5

Overall

8.4

Crew

8.7

Reviews

1 / 20
10.0
Excellent

Jacqueline,Aug 2025

ICN - SEA

Well, I was upset at first because I have a special diet and I need to order vegetarian and I couldn’t do it before the trip, but the stewardess were so nice and they gave me sandwiches that were plant-based which I loved!!
Alaska Airlines
7.9
Good
12,400 reviews
Korean Air
8.4
Very good
1,217 reviews

Comfort

8.3

Entertainment

8.2

Food

8.1

Boarding

8.5

Overall

8.4

Crew

8.7

Reviews

1 / 20
10.0
Excellent

Jacqueline,Aug 2025

ICN - SEA

Well, I was upset at first because I have a special diet and I need to order vegetarian and I couldn’t do it before the trip, but the stewardess were so nice and they gave me sandwiches that were plant-based which I loved!!
Delta
7.9
Good
8,444 reviews
Korean Air
8.4
Very good
1,217 reviews

Comfort

8.3

Entertainment

8.2

Food

8.1

Boarding

8.5

Overall

8.4

Crew

8.7

Reviews

1 / 20
10.0
Excellent

Jacqueline,Aug 2025

ICN - SEA

Well, I was upset at first because I have a special diet and I need to order vegetarian and I couldn’t do it before the trip, but the stewardess were so nice and they gave me sandwiches that were plant-based which I loved!!
Hawaiian Airlines
7.8
Good
2,835 reviews
Korean Air
8.4
Very good
1,217 reviews

Comfort

8.3

Entertainment

8.2

Food

8.1

Boarding

8.5

Overall

8.4

Crew

8.7

Reviews

1 / 20
10.0
Excellent

Jacqueline,Aug 2025

ICN - SEA

Well, I was upset at first because I have a special diet and I need to order vegetarian and I couldn’t do it before the trip, but the stewardess were so nice and they gave me sandwiches that were plant-based which I loved!!

Related info for your journey

Find useful and relevant information for your journey from Seoul to Washington. 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 Seoul to State of Washington?

    Departing from Seoul to State of Washington will take you 18h 28m. Seoul and State of Washington are separated by a distance of 5200 mi. Both multi-stop and nonstop flights can be found to your destination and back.

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

    $309 is the cheapest one-way deal found within the past few days, from Hawaiian Airlines. You may also be able to find cheap deals on Air Canada and Asiana Airlines, with prices starting from $351 and $402, respectively.

  • What are the most popular routes from Seoul to State of Washington?

    The most popular route from Seoul to State of Washington is Incheon Intl - Seattle/Tacoma Intl. You may also consider Seoul Gimpo Intl - Seattle/Tacoma Intl or Incheon Intl - Portland.

  • What are the most reliable airlines from Seoul to State of Washington?

    No one likes to see their flight delayed. When booking a flight from Seoul to State of Washington consider choosing Delta (81%), Korean Air (81%) or Hawaiian Airlines (76%) as they are the most reliable in getting you off to your destination on time.

  • What are the cheapest flights from Seoul to State of Washington?

    The cheapest flight price from Seoul to State of Washington is $503. On average you can expect to pay $1,449. The most popular route, (Incheon Intl - Seattle/Tacoma Intl), can usually be booked for $1,038.

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

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

  • How can I find direct flights from Seoul to Washington?

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

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

    Yes. Cheapflights offers flight deals from Seoul to Washington 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 Seoul to State of Washington?

    Currently, August is the cheapest month in which you can book a flight from Seoul to State of Washington (average of $143). Flying from Seoul to State of Washington in October is currently the most expensive (average of $960). 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 Seoul to Washington

Discover the top 7 airlines that operate flights from Seoul to Washington. 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 23, 2026.
AirlineCheapestAverageFlexibilityOn-time
Hawaiian AirlinesCheapest$351Average$866FlexibilityNo cancel feeOn-time85%
Air CanadaCheapest$472Average$518FlexibilityNo cancel feeOn-time67%
Alaska AirlinesCheapest$476Average$598FlexibilityNo cancel feeOn-time75%
DeltaCheapest$484Average$711FlexibilityNo cancel feeOn-timeN/A
Korean AirCheapest$486Average$749FlexibilityNo cancel feeOn-time81%
Asiana AirlinesCheapest$512Average$616FlexibilityNo cancel feeOn-time76%
Alaska AirlinesCheapest$583Average$638FlexibilityNo cancel feeOn-timeN/A

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