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Incheon Intl

$348+ Cheap flights from Washington to Incheon Intl (ICN)

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 10/23. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — ICN
Oct 17 — Oct 241
Fri 10/17
Fri 10/24
1 adult, Economy
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Cheap flight deals from Washington to Incheon Intl

Keep the following information in mind while searching for Washington to Incheon Intl flight deals. Data was last updated September 17, 2025.

Round-trip from

$751
(Kiwi.com)

One-way from

$348
(Mytrip)

Popular in

June

Cheapest in

August

Average price

$929

Good round-trip deal

$678 or less

Good one-way deal

$370 or less
From Washington to Incheon Intl
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One-way flight from Washington to Incheon Intl
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Highest demand for flights based on searches. 17% potential increase in price ($236 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($40 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Price to beat on a round-trip flight from Washington to Incheon Intl.
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Price to beat on a one-way flight from Washington to Incheon Intl.
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Find flight deals from Washington to Incheon Intl

Cheapest flights from Washington to Incheon Intl
Explore the most affordable flight options available from Washington to Incheon Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 17, 2025.

This Kiwi.com deal was found by Cheapflights users on 9/17. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/248:40 amSEA - ICN
1 stop18h 05mWestJet
Sun 10/269:15 pmICN - SEA
1 stop33h 05mWestJet
Deal found 9/17$752
This Kiwi.com deal was found by Cheapflights users on 9/16. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/264:40 pmSEA - ICN
2 stops55h 05mMultiple Airlines
Tue 10/289:15 pmICN - SEA
1 stop33h 05mMultiple Airlines
Deal found 9/16$754
This Kiwi.com deal was found by Cheapflights users on 9/16. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/203:22 pmSEA - ICN
1 stop31h 58mMultiple Airlines
Thu 11/278:35 pmICN - SEA
Nonstop10h 10mMultiple Airlines
Deal found 9/16$756
This Kiwi.com deal was found by Cheapflights users on 9/16. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/232:15 pmSEA - ICN
Nonstop11h 40mMultiple Airlines
Tue 10/289:15 pmICN - SEA
1 stop33h 05mMultiple Airlines
Deal found 9/16$757
This Mytrip deal was found by Cheapflights users on 9/17. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/110:00 amSEA - ICN
1 stop14h 05mMultiple Airlines
Thu 10/910:40 amICN - SEA
2 stops19h 36mMultiple Airlines
Deal found 9/17$758
This CrystalTravel deal was found by Cheapflights users on 9/16. 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 CrystalTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/212:10 amSEA - ICN
Nonstop12h 10mAsiana Airlines
Mon 11/109:00 pmICN - SEA
Nonstop9h 55mAsiana Airlines
Deal found 9/16$761
This Kiwi.com deal was found by Cheapflights users on 9/16. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/171:02 pmSEA - ICN
1 stop23h 48mMultiple Airlines
Sun 11/29:20 pmICN - SEA
2 stops30h 03mMultiple Airlines
Deal found 9/16$763
This Kiwi.com deal was found by Cheapflights users on 9/16. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/212:15 pmSEA - ICN
Nonstop11h 40mMultiple Airlines
Tue 10/289:15 pmICN - SEA
1 stop33h 05mMultiple Airlines
Deal found 9/16$764
This Kiwi.com deal was found by Cheapflights users on 9/15. 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 10/38:37 amSEA - ICN
3 stops42h 08mMultiple Airlines
Fri 10/106:20 pmICN - SEA
Nonstop10h 10mMultiple Airlines
Deal found 9/15$765
This Kiwi.com deal was found by Cheapflights users on 9/17. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/248:40 amSEA - ICN
1 stop18h 05mMultiple Airlines
Wed 10/299:25 pmICN - SEA
1 stop18h 07mMultiple Airlines
Deal found 9/17$767
This Kiwi.com deal was found by Cheapflights users on 9/16. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/141:02 pmSEA - ICN
2 stops34h 43mMultiple Airlines
Wed 10/229:25 pmICN - SEA
1 stop18h 34mMultiple Airlines
Deal found 9/16$768
This Kiwi.com deal was found by Cheapflights users on 9/17. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/162:18 pmPDX - ICN
1 stop33h 27mMultiple Airlines
Fri 10/248:45 pmICN - PDX
2 stops34h 03mMultiple Airlines
Deal found 9/17$773

Cheapflights Fare Finder

 
Customize your flight search to find flights from Washington to Incheon Intl 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 September 17, 2025.
Use the filters below to find and compare flights from Washington to Incheon Intl Airport that are best for you.

Fly from

Washington

Fly to

Incheon Intl

Route

Depart

Return

Price

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Thu 10/2

12:15 pm-4:30 pm

Nonstop12h 15m

Incheon Intl

Tue 10/21

7:20 pm-1:30 pm

Nonstop10h 10m

$830

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Thu 10/2

12:15 pm-4:30 pm

Nonstop12h 15m

Incheon Intl

Thu 10/16

7:20 pm-1:30 pm

Nonstop10h 10m

$830

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Tue 11/11

12:10 am-5:20 am

Nonstop12h 10m

Incheon Intl

Sun 12/7

9:00 pm-1:55 pm

Nonstop9h 55m

$831

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Mon 11/10

12:10 am-5:20 am

Nonstop12h 10m

Incheon Intl

Sat 12/6

9:00 pm-1:55 pm

Nonstop9h 55m

$831

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Sun 10/19

7:25 am-5:20 pm

1 stop17h 55m

Incheon Intl

Sun 11/2

4:10 pm-10:00 am

Nonstop9h 50m

$834

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Mon 9/29

7:20 am-5:20 pm

1 stop18h 00m

Incheon Intl

Mon 10/13

4:40 pm-10:40 am

Nonstop10h 00m

$834

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Thu 10/2

7:20 am-5:20 pm

1 stop18h 00m

Incheon Intl

Mon 11/3

4:10 pm-9:00 am

Nonstop9h 50m

$834

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Thu 10/2

8:00 am-5:50 pm

1 stop17h 50m

Incheon Intl

Tue 10/14

4:40 pm-10:40 am

Nonstop10h 00m

$837

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Fri 10/3

7:15 am-5:50 pm

1 stop18h 35m

Incheon Intl

Sun 10/12

4:40 pm-10:40 am

Nonstop10h 00m

$837

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Wed 11/5

7:10 am-5:40 pm

1 stop17h 30m

Incheon Intl

Sun 11/16

4:10 pm-9:00 am

Nonstop9h 50m

$837

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/15

Showing 1-10 of 53 results
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Best time to book a flight from Washington to Incheon Intl

Have a flexible travel schedule? Discover the best time to fly to Incheon Intl 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 Incheon Intl Airport

What is the cheapest month to book a flight from State of Washington to Incheon Intl Airport?

Currently, February is the cheapest month in which you can book a flight from State of Washington to Incheon Intl Airport (average of $989). Flying from State of Washington to Incheon Intl Airport in December is currently the most expensive (average of $1,621). 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 ICN?

Find hourly flight availability from Washington to Incheon Intl. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 17, 2025.

When flying from State of Washington to Incheon Intl Airport, 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 Incheon Intl Airport

Explore weekly flight availability from Washington to Incheon Intl. 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 September 17, 2025.

The most flights from USWA to ICN are scheduled on a Thursday (10 on average). You will have fewer flight options on Wednesday, 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 Incheon Intl. 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 Incheon Intl Airport flight route?

    Within the past month, 200 users have taken a look at flights from Washington to Incheon Intl.

  • How long is the flight from State of Washington to Incheon Intl Airport?

    Airlines like Delta, Asiana Airlines, and American Airlines fly from State of Washington to Incheon Intl Airport in about 12h 10m. The time it takes to get you to your destination can typically vary by up to 22h 45m. The distance between State of Washington and Incheon Intl Airport is about 5200 mi. This flight may include one or multiple stops.

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

    To fly one-way, consider booking your trip with Delta, which is currently one of the cheapest options available, starting at $424. Alaska Airlines flights start at $451 while deals on United Airlines start at $451 one-way.

  • What are the most popular routes from State of Washington to Incheon Intl Airport?

    While some choose either Portland - Incheon Intl or Spokane - Incheon Intl, Seattle/Tacoma Intl - Incheon Intl is the most popular route from State of Washington to Incheon Intl Airport.

  • What are the most reliable airlines from State of Washington to Incheon Intl Airport?

    Before booking your flight to Incheon Intl Airport from State of Washington, check out the most reliable airlines to get you to your destination on time: Alaska Airlines (67%), Hawaiian Airlines (67%), Delta( 63%).

  • What are the cheapest flights from State of Washington to Incheon Intl Airport?

    The cheapest flight price from State of Washington to Incheon Intl Airport is $336. On average you can expect to pay $1,278. The most popular route, (Seattle/Tacoma Intl - Incheon Intl), can usually be booked for $606.

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

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

  • How can I find direct flights from Washington to Incheon Intl?

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

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

    Yes. Cheapflights offers flight deals from Washington to Incheon Intl 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 Incheon Intl Airport?

    Currently, February is the cheapest month in which you can book a flight from State of Washington to Incheon Intl Airport (average of $989). Flying from State of Washington to Incheon Intl Airport in December is currently the most expensive (average of $1,621). 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

Traveling to a place near Incheon Intl Airport?

Book flights to Incheon Intl Airport if you plan to visit one of these locations
Suwon
Seongnam

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Alternative routes for Washington to Incheon Intl

See prices for flight routes from nearby airports that may be better suited for you.
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Dallas/Fort Worth to Gimpo Intl flights
George Bush Intcntl to Incheon Intl flights
O'Hare Intl to Gimpo Intl flights
Philadelphia to Incheon Intl flights
San Diego to Incheon Intl flights
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George Bush Intcntl to Gimpo Intl flights
Denver to Incheon Intl flights
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Reagan-National to Gimpo Intl flights
Boston to Gimpo Intl flights
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Atlanta to Gimpo Intl flights
Oakland to Incheon Intl flights
Portland to Incheon Intl flights
San Jose to Gimpo Intl flights
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Midway to Incheon Intl flights

Top 10 airlines flying from Washington to Incheon Intl

Discover the top 10 airlines that operate flights from Washington to Incheon Intl. 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 September 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$167Average$1,256FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$182Average$998FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$282Average$865FlexibilityNo cancel feeOn-time69%
Hawaiian AirlinesCheapest$645Average$1,218FlexibilityNo cancel feeOn-time85%
Air CanadaCheapest$738Average$912FlexibilityNo cancel feeOn-time67%
Asiana AirlinesCheapest$811Average$1,119FlexibilityNo cancel feeOn-time76%
Korean AirCheapest$863Average$1,515FlexibilityNo cancel feeOn-time81%
China AirlinesCheapest$886Average$1,070FlexibilityNo cancel feeOn-time70%
EVA AirCheapest$978Average$1,089FlexibilityNo cancel feeOn-time74%
Turkish AirlinesCheapest$1,007Average$1,247FlexibilityNo cancel feeOn-time77%

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