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Incheon Intl

$393+ 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 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
Tue 6/17
Tue 6/24
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 June 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 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. 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 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 June 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.
Mon 9/155:30 amSEA - ICN
3 stops31h 00mMultiple Airlines
Mon 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.
Tue 9/161:10 amSEA - ICN
1 stop26h 25mChina Airlines
Sat 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.
Fri 8/227:10 amSEA - ICN
2 stops36h 45mChina Eastern
Tue 9/24:20 pmICN - SEA
2 stops40h 34mChina Eastern
Deal found 6/12$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.
Sat 10/182:55 pmSEA - ICN
1 stop33h 10mAir Canada
Wed 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.
Fri 9/2612:50 pmSEA - ICN
Nonstop11h 50mKorean Air
Fri 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.
Mon 10/202:15 pmSEA - ICN
Nonstop11h 40mAsiana Airlines
Sat 11/19:00 pmICN - SEA
Nonstop9h 55mAsiana Airlines
Deal found 6/12$961
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.
Sat 9/64:03 pmPSC - ICN
2 stops34h 42mMultiple Airlines
Sat 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.
Tue 10/219:10 amGEG - ICN
1 stop15h 20mDelta
Sun 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.
Wed 9/241:30 amSEA - ICN
1 stop17h 30mEVA Air
Thu 10/1612:00 pmICN - SEA
1 stop22h 50mEVA Air
Deal found 6/12$979
This ScholarTrip 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 ScholarTrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/711:40 amSEA - ICN
2 stops34h 25mCathay Pacific
Sun 9/148:05 pmICN - SEA
2 stops39h 01mCathay Pacific
Deal found 6/11$994
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.
Sat 10/1812:25 pmSEA - ICN
Nonstop12h 05mDelta
Fri 10/318:05 pmICN - SEA
Nonstop10h 15mDelta
Deal found 6/12$999
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/85:20 amPSC - ICN
1 stop18h 10mDelta
Sat 11/158:05 pmICN - PSC
1 stop13h 13mDelta
Deal found 6/10$1,000

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 June 12, 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

Mon 9/15

5:30 am-4:30 am

3 stops31h 00m

Incheon Intl

Mon 9/22

2:50 pm-6:36 pm

2 stops19h 46m

$918

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Tue 9/16

1:10 am-7:35 pm

1 stop26h 25m

Incheon Intl

Sat 9/27

8:35 pm-7:20 pm

1 stop14h 45m

$920

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Fri 8/22

7:10 am-11:55 am

2 stops36h 45m

Incheon Intl

Tue 9/2

4:20 pm-4:54 pm

2 stops40h 34m

$924

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Sat 10/18

2:55 pm-4:05 pm

1 stop33h 10m

Incheon Intl

Thu 10/30

5:50 pm-2:26 pm

1 stop12h 36m

$927

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Fri 9/26

12:50 pm-4:40 pm

Nonstop11h 50m

Incheon Intl

Fri 10/24

4:40 pm-10:40 am

Nonstop10h 00m

$949

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Mon 10/20

2:15 pm-5:55 pm

Nonstop11h 40m

Incheon Intl

Sat 11/1

9:00 pm-2:55 pm

Nonstop9h 55m

$961

SpokaneIncheon

GEG - ICN

GEGICN

Spokane

Tue 10/21

9:10 am-4:30 pm

1 stop15h 20m

Incheon Intl

Sun 11/2

8:05 pm-4:57 pm

1 stop13h 52m

$976

PascoIncheon

PSC - ICN

PSCICN

Pasco Tri Cities

Sat 9/6

4:03 pm-6:45 pm

2 stops34h 42m

Incheon Intl

Sat 9/13

12:45 pm-11:55 pm

1 stop27h 10m

$976

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Wed 9/24

1:30 am-11:00 am

1 stop17h 30m

Incheon Intl

Thu 10/16

12:00 pm-6:50 pm

1 stop22h 50m

$979

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Sun 9/7

11:40 am-2:05 pm

2 stops34h 25m

Incheon Intl

Sun 9/14

8:05 pm-7:06 pm

2 stops39h 01m

$994

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/11

Showing 1-10 of 56 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 $1,000). Flying from State of Washington to Incheon Intl Airport 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 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 June 12, 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 June 12, 2025.

The most flights from USWA to ICN 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 Incheon Intl by month

Plan your trip to Incheon Intl by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Incheon Intl Airport 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 Incheon Intl Airport when rainfall is around 0.8 in.

Temperature in Incheon Intl by month

Plan your trip to Incheon Intl by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Incheon Intl Airport, 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 Incheon Intl

Get insights into the airlines that provide service to Incheon Intl. 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 Incheon Intl. Reviews last updated June 12, 2025.
Read reviews from past customers who have flown EVA Air, Korean Air and China Airlines from Washington to Seoul. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
EVA Air
8.4
Very good
1,202 reviews

Boarding

8.4

Comfort

8.3

Entertainment

8.0

Overall

8.4

Food

8.1

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

Boarding

8.4

Comfort

8.3

Entertainment

8.0

Overall

8.4

Food

8.1

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

Boarding

8.4

Comfort

8.3

Entertainment

8.0

Overall

8.4

Food

8.1

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

Boarding

8.4

Comfort

8.3

Entertainment

8.0

Overall

8.4

Food

8.1

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
Delta
8.0
Very good
7,946 reviews
EVA Air
8.4
Very good
1,202 reviews

Boarding

8.4

Comfort

8.3

Entertainment

8.0

Overall

8.4

Food

8.1

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
Alaska Airlines
8.0
Very good
10,000 reviews
EVA Air
8.4
Very good
1,202 reviews

Boarding

8.4

Comfort

8.3

Entertainment

8.0

Overall

8.4

Food

8.1

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 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.

  • 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 WestJet, which is currently one of the cheapest options available, starting at $406. Delta flights start at $433 while deals on Air Canada start at $444 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 (86%), Korean Air (83%), Thai Airways( 33%).

  • 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 $369. On average you can expect to pay $2,086. The most popular route, (Seattle/Tacoma Intl - Incheon Intl), can usually be booked for $820.

  • 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 $1,000). Flying from State of Washington to Incheon Intl Airport 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.

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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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Boston to Gimpo Intl flights
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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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
Alaska AirlinesCheapest$164Average$1,295FlexibilityNo cancel feeOn-time75%
DeltaCheapest$167Average$1,280FlexibilityNo 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$886Average$1,056FlexibilityNo cancel feeOn-time70%
Asiana AirlinesCheapest$910Average$1,201FlexibilityNo cancel feeOn-time76%
Korean AirCheapest$966Average$1,552FlexibilityNo cancel feeOn-time81%
Turkish AirlinesCheapest$970Average$1,205FlexibilityNo cancel feeOn-time77%
EVA AirCheapest$978Average$1,089FlexibilityNo cancel feeOn-time74%

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