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$338+ Cheap flights from Incheon Intl (ICN) 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 2/8. Fares are subject to change and may not be available on all flights or dates of travel.
ICN — SEA
Jan 22 — Jan 291
Thu 1/22
Thu 1/29
1 adult, Economy
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Cheap flight deals from Incheon Intl to Washington

Cheapest flights from Incheon Intl to Washington
Explore the most affordable flight options available from Incheon Intl to Washington. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 23, 2025.

This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/2212:45 pmICN - SEA
1 stop23h 00mUnited Airlines
Thu 1/85:12 pmSEA - ICN
2 stops30h 03mUnited Airlines
Deal found 12/20$557
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 12/2512:45 pmICN - SEA
1 stop29h 14mUnited Airlines
Sat 1/37:05 amSEA - ICN
1 stop29h 35mUnited Airlines
Deal found 12/22$558
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 12/226:00 pmICN - SEA
1 stop23h 59mUnited Airlines
Mon 1/1212:35 pmSEA - ICN
1 stop24h 05mUnited Airlines
Deal found 12/21$566
This Vliegwinkel 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 Vliegwinkel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/268:35 pmICN - PDX
1 stop14h 22mHawaiian Airlines
Sat 1/107:10 amPDX - ICN
1 stop18h 25mHawaiian Airlines
Deal found 12/23$576
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.
Sat 12/2712:45 pmICN - SEA
1 stop29h 14mUnited Airlines
Mon 1/126:03 amSEA - ICN
1 stop17h 12mUnited Airlines
Deal found 12/21$579
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.
Sun 12/2812:45 pmICN - SEA
1 stop29h 14mUnited Airlines
Mon 1/129:00 amSEA - ICN
2 stops27h 40mUnited Airlines
Deal found 12/22$590
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/238:05 pmICN - PDX
1 stop29h 33mDelta
Tue 1/137:37 pmPDX - ICN
1 stop27h 53mDelta
Deal found 12/22$598
This Alaska 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/218:35 pmICN - PDX
1 stop19h 24mMultiple Airlines
Sun 12/289:26 amPDX - ICN
1 stop16h 09mMultiple Airlines
Deal found 12/21$615
This Alaska 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/288:35 pmICN - PDX
1 stop26h 43mMultiple Airlines
Fri 1/169:30 pmPDX - ICN
1 stop28h 05mMultiple Airlines
Deal found 12/21$626
This Hanatour 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 Hanatour is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/258:35 pmICN - SEA
Nonstop10h 10mHawaiian Airlines
Sat 1/31:40 pmSEA - ICN
Nonstop11h 55mHawaiian Airlines
Deal found 12/21$636
This FlightHub 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/229:00 pmICN - SEA
Nonstop9h 55mAsiana Airlines
Sun 1/1112:10 amSEA - ICN
Nonstop12h 10mAsiana Airlines
Deal found 12/21$667
This Trip.com 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/288:35 pmICN - SEA
Nonstop10h 10mHawaiian Airlines
Sat 1/31:40 pmSEA - ICN
Nonstop11h 55mHawaiian Airlines
Deal found 12/22$673

Find flight deals from Incheon Intl to Washington

Keep the following information in mind while searching for Incheon Intl to Washington flight deals. Data was last updated December 23, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$522
(Flightnetwork)

One-way from

$338
(Kiwi.com)

Popular in

August

Cheapest in

November

Average price

$644

Good round-trip deal

$540 or less

Good one-way deal

$556 or less
Provider with most accurate pricing for Seoul (SEL)-Seattle/Tacoma Intl flight deals.
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Provider most trusted by Cheapflights users for Seoul (SEL)-Seattle/Tacoma Intl flights.
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From Incheon Intl to Washington
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One-way flight from Incheon Intl to Washington
Search Deals
Highest demand for flights based on searches. 8% potential increase in price ($63 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 December 2025
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Price to beat on a round-trip flight from Incheon Intl to Washington.
Search Deals
Price to beat on a one-way flight from Incheon Intl to Washington.
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Cheapflights Fare Finder

 
Customize your flight search to find flights from Incheon Intl 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 December 23, 2025.
Use the filters below to find and compare flights from Incheon Intl Airport to Washington that are best for you.

Fly from

Incheon Intl

Fly to

Washington

Route

Depart

Return

Price

IncheonSeattle

ICN - SEA

ICNSEA

Incheon Intl

Thu 2/5

12:45 pm-9:12 pm

1 stop25h 27m

Seattle/Tacoma Intl

Sun 2/8

9:00 am-5:40 am

2 stops27h 40m

$556

IncheonSeattle

ICN - SEA

ICNSEA

Incheon Intl

Mon 3/9

5:00 pm-11:16 pm

2 stops22h 16m

Seattle/Tacoma Intl

Wed 3/18

5:00 am-3:15 pm

1 stop18h 15m

$556

IncheonSeattle

ICN - SEA

ICNSEA

Incheon Intl

Sun 5/17

11:30 am-1:12 am

1 stop29h 42m

Seattle/Tacoma Intl

Sun 8/2

6:57 am-4:20 am

1 stop29h 23m

$558

IncheonSeattle

ICN - SEA

ICNSEA

Incheon Intl

Thu 2/5

12:45 pm-4:29 pm

2 stops20h 44m

Seattle/Tacoma Intl

Thu 2/12

5:05 am-4:15 pm

1 stop18h 10m

$558

IncheonSeattle

ICN - SEA

ICNSEA

Incheon Intl

Tue 3/17

5:00 pm-6:50 pm

1 stop17h 50m

Seattle/Tacoma Intl

Tue 3/31

6:20 am-4:20 am

2 stops30h 00m

$558

IncheonSeattle

ICN - SEA

ICNSEA

Incheon Intl

Tue 2/10

6:00 pm-9:15 pm

2 stops20h 15m

Seattle/Tacoma Intl

Sun 2/22

5:05 am-4:15 pm

1 stop18h 10m

$558

IncheonSeattle

ICN - SEA

ICNSEA

Incheon Intl

Thu 2/26

6:00 pm-12:59 am

1 stop23h 59m

Seattle/Tacoma Intl

Mon 3/9

3:30 pm-4:40 am

2 stops21h 10m

$558

IncheonSeattle

ICN - SEA

ICNSEA

Incheon Intl

Thu 2/5

12:45 pm-4:29 pm

2 stops20h 44m

Seattle/Tacoma Intl

Thu 2/26

5:20 pm-4:15 pm

1 stop29h 55m

$558

IncheonSeattle

ICN - SEA

ICNSEA

Incheon Intl

Fri 1/30

6:00 pm-9:12 pm

1 stop20h 12m

Seattle/Tacoma Intl

Fri 2/13

9:19 am-4:15 pm

1 stop37h 56m

$579

IncheonPortland

ICN - PDX

ICNPDX

Incheon Intl

Thu 2/19

7:15 pm-11:07 am

1 stop32h 52m

Portland

Mon 3/2

2:05 pm-4:45 pm

1 stop33h 40m

$583

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/21

Showing 1-10 of 41 results
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Best time to book a flight from Incheon Intl to Washington

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

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

Currently, November is the cheapest month in which you can book a flight from Incheon Intl Airport to State of Washington (average of $338). Flying from Incheon Intl Airport to State of Washington in August is currently the most expensive (average of $667). 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 ICN to WA?

Find hourly flight availability from Incheon Intl 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 December 23, 2025.

It’s typically best to fly out from Incheon Intl Airport to State of Washington in the afternoon. Doing so could potentially save you 49% on the flight price compared to flying at noon, which is usually more expensive.

Weekly flight availability from Incheon Intl Airport to State of Washington

Explore weekly flight availability from Incheon Intl 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 December 23, 2025.

The most flights from ICN to USWA are scheduled on a Monday (10 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (4 on average).

How much does it cost to fly round-trip from Incheon Intl Airport to State of Washington?

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 December 23, 2025.
Read through reviews of airlines operating flights from Incheon Intl Airport to Washington, such as Korean Air, Asiana Airlines, and Alaska Airlines. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Korean Air
8.4
Very good
1,185 reviews

Entertainment

8.2

Food

8.1

Boarding

8.5

Overall

8.4

Comfort

8.3

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
1,185 reviews
Korean Air
8.4
Very good
1,185 reviews

Entertainment

8.2

Food

8.1

Boarding

8.5

Overall

8.4

Comfort

8.3

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
8.2
Very good
499 reviews
Korean Air
8.4
Very good
1,185 reviews

Entertainment

8.2

Food

8.1

Boarding

8.5

Overall

8.4

Comfort

8.3

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
8.0
Very good
11,517 reviews
Korean Air
8.4
Very good
1,185 reviews

Entertainment

8.2

Food

8.1

Boarding

8.5

Overall

8.4

Comfort

8.3

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
8,015 reviews
Korean Air
8.4
Very good
1,185 reviews

Entertainment

8.2

Food

8.1

Boarding

8.5

Overall

8.4

Comfort

8.3

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
2,820 reviews
Korean Air
8.4
Very good
1,185 reviews

Entertainment

8.2

Food

8.1

Boarding

8.5

Overall

8.4

Comfort

8.3

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 Incheon Intl to Washington. 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 Incheon Intl Airport to State of Washington flight route?

    This flight path from Incheon Intl to Washington was viewed by 1 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

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

    Airlines like United Airlines, American Airlines, and Korean Air fly from Incheon Intl Airport to State of Washington in about 15h 48m. The time it takes to get you to your destination can typically vary by up to 17h 04m. The distance from Incheon Intl Airport to State of Washington is about 5359 mi. Both multi-stop and nonstop flights can be found to your destination and back.

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

    The cheapest airlines for a one-way flight from Incheon Intl Airport to State of Washington are Hawaiian Airlines ($309), Air Canada ($351), and Asiana Airlines ($406).

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

    Most travelers choose Incheon Intl - Seattle/Tacoma Intl, Incheon Intl - Portland or Incheon Intl - Spokane when deciding on the best route from Incheon Intl Airport to State of Washington.

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

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Incheon Intl Airport to State of Washington on time: Delta (83%), Korean Air (83%), Thai Airways (81%).

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

    On average you can expect to pay $1,646 for a flight from Incheon Intl Airport to State of Washington. The cheapest flight overall is $340 while the most popular route, (Incheon Intl - Seattle/Tacoma Intl) is currently priced at $557.

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

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

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

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

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

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

    Currently, November is the cheapest month in which you can book a flight from Incheon Intl Airport to State of Washington (average of $338). Flying from Incheon Intl Airport to State of Washington in August is currently the most expensive (average of $667). 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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Alternative routes for Incheon Intl to Washington

See prices for flight routes from nearby airports that may be better suited for you.
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Top 6 airlines flying from Incheon Intl to Washington

Discover the top 6 airlines that operate flights from Incheon Intl 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 December 23, 2025.
AirlineCheapestAverageFlexibilityOn-time
Hawaiian AirlinesCheapest$352Average$866FlexibilityNo cancel feeOn-time85%
Asiana AirlinesCheapest$467Average$664FlexibilityNo cancel feeOn-time76%
Korean AirCheapest$470Average$729FlexibilityNo cancel feeOn-time81%
Air CanadaCheapest$472Average$727FlexibilityNo cancel feeOn-time67%
Alaska AirlinesCheapest$476Average$578FlexibilityNo cancel feeOn-time75%
DeltaCheapest$606Average$700FlexibilityNo cancel feeOn-timeN/A

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