HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
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 12/4. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — ICN
Nov 29 — Dec 61
Sat 11/29
Sat 12/6
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Washington to Incheon Intl 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 Incheon Intl

Keep the following information in mind while searching for Washington to Incheon Intl flight deals. Data was last updated October 30, 2025.

Most accurate provider

Mytrip
3 stars

Most trusted provider

Mytrip
3 stars

Round-trip from

$735
(Kiwi.com)

One-way from

$348
(Kiwi.com)

Popular in

June

Cheapest in

August

Average price

$980

Good round-trip deal

$673 or less

Good one-way deal

$373 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 Incheon Intl
Search Deals
One-way flight from Washington to Incheon Intl
Search Deals
Highest demand for flights based on searches. 17% potential increase in price ($230 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($38 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
Search Deals
Price to beat on a round-trip flight from Washington to Incheon Intl.
Search Deals
Price to beat on a one-way flight from Washington to Incheon Intl.
Search Deals

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 October 30, 2025.

This Kiwi.com deal was found by Cheapflights users on 10/29. 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 11/2711:26 amSEA - ICN
1 stop17h 09mMultiple Airlines
Thu 12/49:20 pmICN - SEA
2 stops30h 02mMultiple Airlines
Deal found 10/29$735
This Kiwi.com deal was found by Cheapflights users on 10/29. 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 11/149:08 amSEA - ICN
1 stop27h 02mMultiple Airlines
Sun 12/149:20 pmICN - SEA
2 stops30h 02mMultiple Airlines
Deal found 10/29$736
This Kiwi.com deal was found by Cheapflights users on 10/29. 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 11/1310:05 amSEA - ICN
2 stops41h 55mMultiple Airlines
Tue 12/99:20 pmICN - SEA
1 stop16h 18mMultiple Airlines
Deal found 10/29$737
This Kiwi.com deal was found by Cheapflights users on 10/29. 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 11/149:08 amSEA - ICN
1 stop27h 02mMultiple Airlines
Thu 12/119:20 pmICN - SEA
2 stops30h 02mMultiple Airlines
Deal found 10/29$739
This Kiwi.com deal was found by Cheapflights users on 10/29. 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 11/1310:05 amSEA - ICN
2 stops41h 55mMultiple Airlines
Sun 12/149:20 pmICN - SEA
1 stop14h 28mMultiple Airlines
Deal found 10/29$743
This Kiwi.com deal was found by Cheapflights users on 10/29. 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 11/1310:05 amSEA - ICN
2 stops41h 55mMultiple Airlines
Thu 12/49:20 pmICN - SEA
1 stop14h 28mMultiple Airlines
Deal found 10/29$744
This Kiwi.com deal was found by Cheapflights users on 10/29. 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.
Sat 11/2911:26 amSEA - ICN
1 stop17h 09mMultiple Airlines
Sat 12/69:20 pmICN - SEA
1 stop16h 18mMultiple Airlines
Deal found 10/29$752
This Kiwi.com deal was found by Cheapflights users on 10/30. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/1911:10 pmSEA - ICN
1 stop29h 25mMultiple Airlines
Thu 12/49:20 pmICN - SEA
1 stop14h 28mMultiple Airlines
Deal found 10/30$753
This Kiwi.com deal was found by Cheapflights users on 10/29. 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.
Sat 11/2911:26 amSEA - ICN
1 stop17h 09mMultiple Airlines
Thu 12/119:20 pmICN - SEA
1 stop14h 28mMultiple Airlines
Deal found 10/29$754
This Gotogate deal was found by Cheapflights users on 10/29. 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.
Thu 11/610:05 amSEA - ICN
2 stops41h 55mMultiple Airlines
Mon 11/106:55 pmICN - SEA
1 stop12h 36mMultiple Airlines
Deal found 10/29$755
This Kiwi.com deal was found by Cheapflights users on 10/29. 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 11/2511:26 amSEA - ICN
1 stop17h 09mMultiple Airlines
Sun 12/79:20 pmICN - SEA
1 stop14h 28mMultiple Airlines
Deal found 10/29$756
This Kiwi.com deal was found by Cheapflights users on 10/28. 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 11/1012:10 amSEA - ICN
Nonstop12h 10mMultiple Airlines
Thu 11/209:20 pmICN - SEA
2 stops30h 02mMultiple Airlines
Deal found 10/28$758

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 October 30, 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

PortlandIncheon

PDX - ICN

PDXICN

Portland

Thu 3/5

7:00 am-6:35 pm

1 stop18h 35m

Incheon Intl

Sun 4/5

8:35 pm-12:03 am

1 stop19h 28m

$816

PortlandIncheon

PDX - ICN

PDXICN

Portland

Thu 4/16

7:40 am-6:35 pm

1 stop18h 55m

Incheon Intl

Mon 4/20

8:35 pm-10:21 pm

1 stop17h 46m

$816

PortlandIncheon

PDX - ICN

PDXICN

Portland

Wed 3/4

6:00 am-6:35 pm

1 stop19h 35m

Incheon Intl

Wed 4/1

8:35 pm-10:21 pm

1 stop17h 46m

$816

PortlandIncheon

PDX - ICN

PDXICN

Portland

Wed 3/4

9:40 am-6:35 pm

1 stop15h 55m

Incheon Intl

Thu 4/2

8:35 pm-12:03 am

1 stop19h 28m

$816

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Wed 11/12

11:15 am-4:30 pm

Nonstop12h 15m

Incheon Intl

Fri 11/14

8:05 pm-1:20 pm

Nonstop10h 15m

$829

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Wed 11/12

1:45 pm-6:35 pm

Nonstop11h 50m

Incheon Intl

Sat 11/15

8:35 pm-1:55 pm

Nonstop10h 20m

$829

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Tue 11/11

3:37 pm-5:40 am

1 stop21h 03m

Incheon Intl

Mon 12/22

6:00 pm-12:59 am

1 stop23h 59m

$844

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Tue 11/18

11:00 am-3:55 pm

Nonstop11h 55m

Incheon Intl

Tue 11/25

4:10 pm-9:00 am

Nonstop9h 50m

$849

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Thu 11/13

7:00 am-7:25 pm

1 stop19h 25m

Incheon Intl

Thu 11/20

8:35 pm-1:55 pm

Nonstop10h 20m

$854

PortlandIncheon

PDX - ICN

PDXICN

Portland

Sun 3/8

8:40 am-6:35 pm

1 stop17h 55m

Incheon Intl

Mon 4/6

8:35 pm-12:03 am

1 stop19h 28m

$866

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/28

Showing 1-10 of 50 results
1
2
3
...
5

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, August is the cheapest month in which you can book a flight from State of Washington to Incheon Intl Airport (average of $207). Flying from State of Washington to Incheon Intl Airport in July is currently the most expensive (average of $977). 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 October 30, 2025.

A simple way to save on the total cost of your ticket is to fly from State of Washington to Incheon Intl Airport at noon. If you’re flexible enough to do this you can expect to save up to 6% on your trip compared to booking a flight in the evening.

What is the cheapest day to fly from State of Washington to Incheon Intl Airport?

Use this chart to determine the cheapest time to fly round-trip from Washington to Incheon Intl. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their State of Washington to Incheon Intl Airport flight should consider departing on Wednesday evenings when fares are most often at their lowest. Friday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

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 Alaska Airlines, Delta, and United Airlines fly from State of Washington to Incheon Intl Airport in about 12h 15m. The time it takes to get you to your destination can typically vary by up to 8h 48m. 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 Air Canada, which is currently one of the cheapest options available, starting at $404. Delta flights start at $424 while deals on Korean Air start at $431 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: Delta (69%), Korean Air (56%), Alaska Airlines( 35%).

  • 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 $348. On average you can expect to pay $1,461. The most popular route, (Seattle/Tacoma Intl - Incheon Intl), can usually be booked for $770.

  • 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, August is the cheapest month in which you can book a flight from State of Washington to Incheon Intl Airport (average of $207). Flying from State of Washington to Incheon Intl Airport in July is currently the most expensive (average of $977). 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

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 Incheon Intl

See prices for flight routes from nearby airports that may be better suited for you.
Los Angeles to Incheon Intl flights
John F Kennedy Intl to Incheon Intl flights
San Francisco to Incheon Intl flights
Dulles Intl to Incheon Intl flights
Newark to Incheon Intl flights
Dallas/Fort Worth to Incheon Intl flights
Seattle to Incheon Intl flights
Los Angeles to Gimpo Intl flights
Atlanta to Incheon Intl flights
San Francisco to Gimpo Intl flights
O'Hare Intl to Incheon Intl flights
LaGuardia to Incheon Intl flights
John F Kennedy Intl to Gimpo Intl flights
Boston to Incheon Intl flights
Ontario to Incheon Intl flights
Hobby to Incheon Intl flights
Baltimore to Incheon Intl flights
Reagan-National to Incheon Intl flights
Honolulu to Incheon Intl flights
San Jose to Incheon Intl flights
Dulles Intl to Gimpo Intl flights
Seattle to Gimpo Intl flights
Santa Ana to Incheon Intl flights
Newark to Gimpo Intl flights
Las Vegas to Incheon Intl flights
O'Hare Intl to Gimpo Intl flights
Dallas/Fort Worth to Gimpo Intl flights
George Bush Intcntl to Incheon Intl flights
Burbank to Incheon Intl flights
Love Field to Incheon Intl flights
Minneapolis to Incheon Intl flights
Philadelphia to Incheon Intl flights
Detroit to Incheon Intl flights
Orlando to Incheon Intl flights
Midway to Incheon Intl flights
Boston to Gimpo Intl flights
George Bush Intcntl to Gimpo Intl flights
Honolulu to Gimpo Intl flights
San Jose to Gimpo Intl flights
Denver to Incheon Intl flights
Austin to Incheon Intl flights
Reagan-National to Gimpo Intl flights
Miami to Incheon Intl flights
Portland to Incheon Intl flights
Tampa to Incheon Intl flights
San Diego to Incheon Intl flights
Sky Harbor Intl to Incheon Intl flights
Baltimore to Gimpo 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 October 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$167Average$1,173FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$190Average$972FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$282Average$660FlexibilityNo cancel feeOn-time69%
Hawaiian AirlinesCheapest$282Average$884FlexibilityNo cancel feeOn-time85%
Air CanadaCheapest$710Average$969FlexibilityNo cancel feeOn-time67%
Asiana AirlinesCheapest$802Average$1,079FlexibilityNo cancel feeOn-time76%
Korean AirCheapest$850Average$1,541FlexibilityNo cancel feeOn-time81%
China AirlinesCheapest$886Average$1,059FlexibilityNo cancel feeOn-time70%
EVA AirCheapest$978Average$1,089FlexibilityNo cancel feeOn-time74%
Turkish AirlinesCheapest$1,007Average$1,217FlexibilityNo cancel feeOn-time77%

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.