HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Incheon Intl

$344+ 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 3/19. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — ICN
Jan 22 — Jan 291
Thu 1/22
Thu 1/29
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

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 December 23, 2025.

This Gotogate deal was found by Cheapflights users on 12/20. 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.
Mon 12/2912:10 amSEA - ICN
Nonstop12h 10mMultiple Airlines
Wed 1/289:40 pmICN - SEA
2 stops27h 25mMultiple Airlines
Deal found 12/20$868
This oojo deal was found by Cheapflights users on 12/20. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/2912:10 amSEA - ICN
Nonstop12h 10mAsiana Airlines
Wed 1/289:00 pmICN - SEA
Nonstop9h 55mAsiana Airlines
Deal found 12/20$912
This Hawaiian Airlines deal was found by Cheapflights users on 12/21. 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 Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/261:40 pmSEA - ICN
Nonstop11h 55mAlaska Airlines
Sun 12/288:35 pmICN - SEA
Nonstop10h 10mAlaska Airlines
Deal found 12/21$963
This Korean Air deal was found by Cheapflights users on 12/23. 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 Korean Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/2911:30 amSEA - ICN
Nonstop12h 00mKorean Air
Thu 1/89:00 pmICN - SEA
1 stop16h 32mKorean Air
Deal found 12/23$966
This United Airlines deal was found by Cheapflights users on 12/21. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/265:00 amSEA - ICN
1 stop18h 15mUnited Airlines
Sun 12/286:00 pmICN - SEA
1 stop23h 59mUnited Airlines
Deal found 12/21$968
This United Airlines deal was found by Cheapflights users on 12/22. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/255:54 pmSEA - ICN
1 stop18h 46mUnited Airlines
Mon 12/296:00 pmICN - SEA
2 stops22h 08mUnited Airlines
Deal found 12/22$972
This United Airlines deal was found by Cheapflights users on 12/21. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/225:54 pmSEA - ICN
1 stop29h 21mUnited Airlines
Sun 12/286:00 pmICN - SEA
1 stop23h 59mUnited Airlines
Deal found 12/21$974
This United Airlines deal was found by Cheapflights users on 12/21. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/225:54 pmSEA - ICN
1 stop29h 21mUnited Airlines
Sat 12/2712:45 pmICN - SEA
2 stops28h 12mUnited Airlines
Deal found 12/21$979
This Korean Air deal was found by Cheapflights users on 12/22. 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 Korean Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/2811:30 amSEA - ICN
Nonstop12h 00mKorean Air
Mon 12/298:05 pmICN - SEA
Nonstop10h 15mKorean Air
Deal found 12/22$1,043
This Korean Air deal was found by Cheapflights users on 12/22. 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 Korean Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/277:50 pmSEA - ICN
1 stop28h 45mKorean Air
Mon 12/298:05 pmICN - SEA
Nonstop10h 15mKorean Air
Deal found 12/22$1,061
This Delta deal was found by Cheapflights users on 12/21. 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.
Sun 12/2811:30 amSEA - ICN
Nonstop12h 00mDelta
Tue 12/308:05 pmICN - SEA
Nonstop10h 15mDelta
Deal found 12/21$1,071
This Air Canada deal was found by Cheapflights users on 12/23. 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.
Wed 12/317:00 pmPDX - ICN
1 stop28h 00mAir Canada
Thu 1/86:55 pmICN - PDX
1 stop12h 45mAir Canada
Deal found 12/23$1,256

Find 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 December 23, 2025.

Most accurate provider

Mytrip
3 stars

Most trusted provider

Mytrip
3 stars

Round-trip from

$622
(Booking.com)

One-way from

$344
(Kiwi.com)

Popular in

June

Cheapest in

November

Average price

$1,127

Good round-trip deal

$337 or less

Good one-way deal

$366 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. 18% potential increase in price ($233 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($40 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 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

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 December 23, 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

PascoIncheon

PSC - ICN

PSCICN

Pasco Tri Cities

Sun 1/18

5:59 am-6:35 pm

1 stop19h 36m

Incheon Intl

Thu 1/22

8:35 pm-8:57 pm

1 stop17h 22m

$727

PortlandIncheon

PDX - ICN

PDXICN

Portland

Thu 4/30

9:50 am-4:05 pm

1 stop14h 15m

Incheon Intl

Wed 5/27

2:30 am-9:30 am

2 stops23h 00m

$813

PortlandIncheon

PDX - ICN

PDXICN

Portland

Mon 3/30

9:50 am-4:05 pm

1 stop14h 15m

Incheon Intl

Sun 5/31

2:30 am-9:30 am

2 stops23h 00m

$813

PortlandIncheon

PDX - ICN

PDXICN

Portland

Sat 3/7

9:30 am-6:35 pm

1 stop16h 05m

Incheon Intl

Sun 3/15

8:35 pm-11:44 pm

1 stop19h 09m

$816

PortlandIncheon

PDX - ICN

PDXICN

Portland

Sat 4/4

6:00 am-6:35 pm

1 stop20h 35m

Incheon Intl

Mon 4/13

8:35 pm-11:44 pm

1 stop19h 09m

$816

PortlandIncheon

PDX - ICN

PDXICN

Portland

Fri 2/27

9:30 am-6:35 pm

1 stop16h 05m

Incheon Intl

Sat 3/7

8:35 pm-7:15 pm

1 stop15h 40m

$816

PascoIncheon

PSC - ICN

PSCICN

Pasco Tri Cities

Thu 2/5

5:59 am-6:35 pm

1 stop19h 36m

Incheon Intl

Thu 2/12

8:35 pm-8:55 pm

1 stop17h 20m

$819

PortlandIncheon

PDX - ICN

PDXICN

Portland

Tue 1/20

5:35 pm-6:35 pm

1 stop32h 00m

Incheon Intl

Thu 2/5

8:35 pm-4:34 pm

1 stop12h 59m

$821

PortlandIncheon

PDX - ICN

PDXICN

Portland

Thu 2/5

9:50 am-1:20 am

2 stops22h 30m

Incheon Intl

Thu 2/12

6:55 pm-6:30 pm

1 stop16h 35m

$832

PortlandIncheon

PDX - ICN

PDXICN

Portland

Thu 4/30

9:50 am-4:05 pm

1 stop14h 15m

Incheon Intl

Thu 5/28

5:45 pm-2:45 pm

1 stop13h 00m

$846

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/21

Showing 1-10 of 52 results
1
2
3
...
6

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, April is the cheapest month in which you can book a flight from State of Washington to Incheon Intl Airport (average of $335). Flying from State of Washington to Incheon Intl Airport in December is currently the most expensive (average of $804). 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 December 23, 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 8% 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 at noon 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.

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 December 23, 2025.

The most flights from USWA to ICN are scheduled on a Wednesday (10 on average). You will have fewer flight options on Thursday, 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, United Airlines, and Hawaiian Airlines fly from State of Washington to Incheon Intl Airport in about 11h 50m. The time it takes to get you to your destination can typically vary by up to 19h 30m. 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 Hawaiian Airlines, which is currently one of the cheapest options available, starting at $160. Alaska Airlines flights start at $182 while deals on Asiana Airlines start at $414 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 (62%), Korean Air (57%), Thai Airways( 55%).

  • 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 $188. On average you can expect to pay $1,219. The most popular route, (Seattle/Tacoma Intl - Incheon Intl), can usually be booked for $634.

  • 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, April is the cheapest month in which you can book a flight from State of Washington to Incheon Intl Airport (average of $335). Flying from State of Washington to Incheon Intl Airport in December is currently the most expensive (average of $804). 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
Dallas/Fort Worth to Incheon Intl flights
Seattle to Incheon Intl flights
San Francisco to Incheon Intl flights
Dulles Intl to Incheon Intl flights
Los Angeles to Gimpo Intl flights
John F Kennedy Intl to Gimpo Intl flights
Newark to Incheon Intl flights
LaGuardia to Incheon Intl flights
San Francisco to Gimpo Intl flights
O'Hare Intl to Incheon Intl flights
Atlanta to Incheon Intl flights
Hobby to Incheon Intl flights
Boston to Incheon Intl flights
Seattle to Gimpo Intl flights
Ontario to Incheon Intl flights
Love Field to Incheon Intl flights
Baltimore to Incheon Intl flights
Dulles Intl to Gimpo Intl flights
Dallas/Fort Worth to Gimpo Intl flights
Reagan-National to Incheon Intl flights
Honolulu to Incheon Intl flights
Newark to Gimpo Intl flights
Minneapolis to Incheon Intl flights
Las Vegas to Incheon Intl flights
San Jose to Incheon Intl flights
George Bush Intcntl to Incheon Intl flights
Orlando to Incheon Intl flights
Denver to Incheon Intl flights
Charlotte to Incheon Intl flights
Honolulu to Gimpo Intl flights
O'Hare Intl to Gimpo Intl flights
Austin to Incheon Intl flights
Philadelphia to Incheon Intl flights
Detroit to Incheon Intl flights
George Bush Intcntl to Gimpo Intl flights
Baltimore to Gimpo Intl flights
Atlanta to Gimpo Intl flights
Boston to Gimpo Intl flights
Salt Lake City to Incheon Intl flights
Portland to Incheon Intl flights
LaGuardia to Gimpo Intl flights
Tampa to Incheon Intl flights
Santa Ana to Incheon Intl flights
Reagan-National to Gimpo Intl flights
Nashville to Incheon Intl flights
Sky Harbor Intl to Incheon Intl flights
Miami 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 December 23, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$179Average$1,159FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$282Average$660FlexibilityNo cancel feeOn-time69%
Hawaiian AirlinesCheapest$282Average$884FlexibilityNo cancel feeOn-time85%
Alaska AirlinesCheapest$335Average$338FlexibilityNo cancel feeOn-time75%
Air CanadaCheapest$611Average$984FlexibilityNo cancel feeOn-time67%
Asiana AirlinesCheapest$797Average$1,067FlexibilityNo cancel feeOn-time76%
Korean AirCheapest$847Average$1,536FlexibilityNo cancel feeOn-time81%
China AirlinesCheapest$886Average$1,073FlexibilityNo cancel feeOn-time70%
EVA AirCheapest$978Average$1,089FlexibilityNo cancel feeOn-time74%
Turkish AirlinesCheapest$995Average$1,207FlexibilityNo 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.