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$436+ Cheap flights from Incheon Intl (ICN) to Seattle (SEA)

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 9/11. Fares are subject to change and may not be available on all flights or dates of travel.
ICN — SEA
Aug 27 — Sep 31
Thu 8/27
Thu 9/3
1 adult, Economy
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Find cheap flights from Incheon Intl to Seattle with Cheapflights

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Cheapflights Tip: The best prices from Incheon Intl to Seattle/Tacoma Intl are usually found in November or September, booked 25 days in advance, depart on a Monday or Thursday and return on a Wednesday

Cheap flight deals from Incheon Intl to Seattle

Cheapest flights from Incheon Intl to Seattle
Explore the most affordable flight options available from Incheon Intl to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 28, 2026.

This WhyPayMore deal was found by Cheapflights users on 7/26. 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 WhyPayMore is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/145:45 pm
ICN
-
SEA
1 stop21h 02m
Air Canada
Fri 9/185:50 am
SEA
-
ICN
1 stop18h 15m
Air Canada
Deal found 7/26$801
This WhyPayMore deal was found by Cheapflights users on 7/26. 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 WhyPayMore is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/215:45 pm
ICN
-
SEA
1 stop21h 02m
Air Canada
Sun 9/277:15 pm
SEA
-
ICN
1 stop28h 50m
Air Canada
Deal found 7/26$802
This flugladen.de deal was found by Cheapflights users on 7/26. 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 flugladen.de is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/78:30 pm
ICN
-
SEA
1 stop39h 35m
Philippine Airlines
Sun 9/2011:10 pm
SEA
-
ICN
1 stop28h 05m
Philippine Airlines
Deal found 7/26$807
This WhyPayMore deal was found by Cheapflights users on 7/24. 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 WhyPayMore is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/97:35 pm
ICN
-
SEA
Nonstop10h 05m
Alaska Airlines
Sun 9/201:35 pm
SEA
-
ICN
Nonstop11h 55m
Alaska Airlines
Deal found 7/24$813
This Gotogate deal was found by Cheapflights users on 7/24. 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.
Tue 9/88:30 pm
ICN
-
SEA
1 stop39h 35m
Philippine Airlines
Tue 9/1511:10 pm
SEA
-
ICN
1 stop28h 05m
Philippine Airlines
Deal found 7/24$814
This Cheapflightsfares deal was found by Cheapflights users on 7/26. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/157:20 am
ICN
-
SEA
1 stop28h 45m
Philippine Airlines
Thu 10/1511:10 pm
SEA
-
ICN
1 stop28h 05m
Philippine Airlines
Deal found 7/26$815
This Justfly.com deal was found by Cheapflights users on 7/23. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/165:45 pm
ICN
-
SEA
1 stop16h 47m
Air Canada
Mon 10/268:40 am
SEA
-
ICN
1 stop15h 30m
Air Canada
Deal found 7/23$816

Find flight deals from Incheon Intl to Seattle

Discover tips and strategies to find the most affordable flight options for your journey from Incheon Intl (ICN) to Seattle (SEA). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated July 28, 2026.

Most accurate provider

BusinessClass
3 stars

Most trusted provider

BusinessClass
3 stars

Round-trip from

$738
(Flysmarter)

One-way from

$419
(Kiwi.com)

Popular in

June

Cheapest in

November

Average price

$994

Good round-trip deal

$836 or less

Good one-way deal

$704 or less
Provider with most accurate pricing for Incheon Intl-Seattle/Tacoma Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Incheon Intl-Seattle/Tacoma Intl flights.
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From Incheon Intl to Seattle/Tacoma Intl
Search Deals
One-way flight from Incheon Intl to Seattle/Tacoma Intl
Search Deals
Highest demand for flights based on searches. 21% potential increase in price ($210 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($31 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2026
Search Deals
Price to beat on a round-trip flight from Incheon Intl to Seattle/Tacoma Intl.
Search Deals
Price to beat on a one-way flight from Incheon Intl to Seattle/Tacoma Intl.
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Cheapflights Fare Finder

 
Customize your flight search to find flights from Incheon Intl to Seattle 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 July 28, 2026.
Use the filters below to find and compare flights from Incheon Intl Airport to Seattle that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip
Quickest round-trip

IncheonSeattle

ICN - SEA

ICNSEA

Incheon Intl

Mon 11/23

8:00 pm-12:55 pm

Nonstop9h 55m

Seattle/Tacoma Intl

Wed 3/10

12:40 pm-5:35 pm

Nonstop11h 55m

$821

IncheonSeattle

ICN - SEA

ICNSEA

Incheon Intl

Thu 10/22

4:50 pm-9:59 pm

2 stops21h 09m

Seattle/Tacoma Intl

Sun 10/25

7:35 pm-4:15 pm

1 stop28h 40m

$849

IncheonSeattle

ICN - SEA

ICNSEA

Incheon Intl

Mon 9/7

4:40 pm-10:40 am

Nonstop10h 00m

Seattle/Tacoma Intl

Sun 9/20

10:55 am-5:20 pm

1 stop38h 25m

$934

IncheonSeattle

ICN - SEA

ICNSEA

Incheon Intl

Wed 9/9

4:40 pm-10:40 am

Nonstop10h 00m

Seattle/Tacoma Intl

Wed 9/16

7:15 am-5:20 pm

1 stop18h 05m

$941

IncheonSeattle

ICN - SEA

ICNSEA

Incheon Intl

Fri 10/16

4:50 pm-10:01 am

2 stops33h 11m

Seattle/Tacoma Intl

Thu 11/12

5:05 am-5:40 am

2 stops31h 35m

$947

IncheonSeattle

ICN - SEA

ICNSEA

Incheon Intl

Wed 8/12

8:30 pm-8:05 pm

1 stop39h 35m

Seattle/Tacoma Intl

Fri 8/21

11:10 pm-6:00 am

1 stop38h 50m

$998

IncheonSeattle

ICN - SEA

ICNSEA

Incheon Intl

Tue 10/6

11:30 am-3:33 pm

2 stops20h 03m

Seattle/Tacoma Intl

Tue 10/13

4:35 pm-3:00 pm

2 stops30h 25m

$1,042

IncheonSeattle

ICN - SEA

ICNSEA

Incheon Intl

Fri 8/14

11:30 am-11:26 pm

1 stop27h 56m

Seattle/Tacoma Intl

Thu 8/20

6:30 am-4:20 am

2 stops29h 50m

$1,046

IncheonSeattle

ICN - SEA

ICNSEA

Incheon Intl

Thu 8/20

9:00 pm-8:45 am

1 stop27h 45m

Seattle/Tacoma Intl

Tue 8/25

1:20 pm-4:40 pm

Nonstop11h 20m

$1,075

IncheonSeattle

ICN - SEA

ICNSEA

Incheon Intl

Tue 8/25

7:40 pm-9:57 am

1 stop30h 17m

Seattle/Tacoma Intl

Tue 9/1

12:50 pm-4:40 pm

Nonstop11h 50m

$1,083

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/23

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

Compare providers for flights from Incheon Intl to Seattle

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Incheon Intl to Seattle in July.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
BusinessClassPrice Accuracy3 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
JetabroadPrice Accuracy3 starsTrust Score*3 stars
GurufarePrice Accuracy3 starsTrust Score*3 stars
Justfly.comPrice Accuracy3 starsTrust Score*3 stars
oojoPrice Accuracy3 starsTrust Score*2 stars
CheapflightsfaresPrice Accuracy2 starsTrust Score*1 star
CheapOairPrice Accuracy3 starsTrust Score*3 stars
OvagoPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Incheon Intl Airport-Seattle flights, users find the pricing of BusinessClass to be most consistent on Cheapflights vs. BusinessClass Users can find the same prices on Incheon Intl Airport-Seattle flight deals on Cheapflights vs. BusinessClass >95% of the time. Price accuracy is based on data collected from Incheon Intl Airport-Seattle flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Incheon Intl Airport-Seattle flights, Cheapflights users trust BusinessClass the most. BusinessClass has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Incheon Intl Airport-Seattle flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Incheon Intl to Seattle

Have a flexible travel schedule? Discover the best time to fly to Seattle 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 Seattle

How far ahead should I book a flight from Incheon Intl Airport to Seattle?

To ensure you get the cheapest price possible for a flight from Incheon Intl Airport to Seattle, you should look to book at least 24 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

What is the cheapest month to book a flight from Incheon Intl Airport to Seattle?

Currently, November is the cheapest month in which you can book a flight from Incheon Intl Airport to Seattle (average of $562). Flying from Incheon Intl Airport to Seattle in June is currently the most expensive (average of $1,104). 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 SEA?

Find hourly flight availability from Incheon Intl to Seattle. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated July 28, 2026.

When flying from Incheon Intl Airport to Seattle, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

How much does it cost to fly round-trip from Incheon Intl Airport to Seattle?

Airfare is below average for this route at the moment.

Incheon Intl Airport to Seattle flights typically cost between $964 and $1,102 in September.
The cheapest round-trip price found within the last 5 days was $801 on Air Canada (Sep 14-Sep 18).

The best insider tips for Incheon Intl Airport to Seattle flights

AI-powered summary based on content written by travel experts. AI can make mistakes.
Cheapflights partnered with top experts to bring you the best recommendations for your Incheon Intl Airport to Seattle trip
Our travel experts
Gabriel Leigh

Gabriel Leigh

Expert on ICN

Gabriel is a writer and video creator. As senior content producer for Flightradar24 and Monocle’s transport correspondent, he keeps a close eye on aviation in particular. He has also written travel articles for the likes of The New York Times. Born in New York but raised around the world, he now lives in Sweden. He’s been to 75 countries, flying 2.3 million miles on 113 airlines and through 234 airports in the process.

Read more
Brandon Schultz

Brandon Schultz

Expert on SEA

Brandon Schultz is an award-winning food and travel writer based in New York City. His work has appeared in Forbes, AAA, Thrillist, Travel + Leisure, and The Daily Meal, among many others, and he is the author of 6 books, including 3 cookbooks.

Read more

Reviews of airlines servicing Seattle

Get insights into the airlines that provide service to Seattle. 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 Seattle. Reviews last updated July 28, 2026.
See what other customers who have flown with Korean Air,Asiana Airlines, andAlaska Airlines from Incheon Intl Airport to Seattle have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Korean Air
8.4
Very good
1,221 reviews

Food

8.1

Entertainment

8.2

Boarding

8.5

Crew

8.7

Overall

8.4

Comfort

8.3

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
1,221 reviews
Korean Air
8.4
Very good
1,221 reviews

Food

8.1

Entertainment

8.2

Boarding

8.5

Crew

8.7

Overall

8.4

Comfort

8.3

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
8.1
Very good
555 reviews
Korean Air
8.4
Very good
1,221 reviews

Food

8.1

Entertainment

8.2

Boarding

8.5

Crew

8.7

Overall

8.4

Comfort

8.3

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
7.9
Good
12,721 reviews
Korean Air
8.4
Very good
1,221 reviews

Food

8.1

Entertainment

8.2

Boarding

8.5

Crew

8.7

Overall

8.4

Comfort

8.3

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
7.8
Good
8,483 reviews
Korean Air
8.4
Very good
1,221 reviews

Food

8.1

Entertainment

8.2

Boarding

8.5

Crew

8.7

Overall

8.4

Comfort

8.3

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
2,821 reviews
Korean Air
8.4
Very good
1,221 reviews

Food

8.1

Entertainment

8.2

Boarding

8.5

Crew

8.7

Overall

8.4

Comfort

8.3

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 Seattle. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Seattle from Incheon Intl?

    Located just 11.4 mi from the city center, Seattle/Tacoma Intl is the airport most travelers will use when flying to Seattle from Incheon Intl. Booking flights from Incheon Intl to Seattle/Tacoma Intl (SEA) should be relatively easy as there are 7 daily inbound flights from Incheon Intl from 6 different airlines.

  • How long is the flight from Incheon Intl Airport to Seattle?

    There are many flights that can get you from Incheon Intl Airport to Seattle in 10h 05m. Fly via Alaska Airlines, Philippine Airlines, or Air Canada to get the fastest option. The distance from Incheon Intl Airport to Seattle is about 5200 mi. This flight may include one or multiple stops.

  • What are the cheapest airlines flying from Incheon Intl Airport to Seattle round-trip?

    Flying on Hawaiian Airlines is currently your cheapest option to Seattle, with prices starting at $351. Additional round-trip tickets that might be worth considering are offered by Korean Air and Air Canada, with the lowest prices starting at $464 and $472, respectively. Hawaiian Airlines is priced at 54% lower than the current average price of a flight leaving 3 months from now.

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

    The cheapest airline one-way is Air Canada, with whom users have recently found tickets for as low as $351. However, be on the lookout for offers from Hawaiian Airlines and Asiana Airlines, as they are both options that can get you from Incheon Intl Airport to Seattle for a low price.

  • What are the most reliable airlines from Incheon Intl Airport to Seattle?

    Before booking your flight to Seattle from Incheon Intl Airport, check out the most reliable airlines to get you to your destination on time: Delta (91%), Korean Air (91%), Alaska Airlines( 75%).

  • What are the cheapest flights from Incheon Intl Airport to Seattle?

    Looking for the cheapest flight from Incheon Intl Airport to Seattle? While on average our users pay $2,192, our data indicates the cheapest price to be $570. The most popular route (Incheon Intl - Seattle/Tacoma Intl), is priced around $807.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Incheon Intl to Seattle 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 Seattle?

    Currently, November is the cheapest month in which you can book a flight from Incheon Intl Airport to Seattle (average of $562). Flying from Incheon Intl Airport to Seattle in June is currently the most expensive (average of $1,104). 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 Seattle?

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Alternative routes for Incheon Intl to Seattle

See prices for flight routes from nearby airports that may be better suited for you.
Incheon Intl to Portland flights

Top 6 airlines flying from Incheon Intl to Seattle

Discover the top 6 airlines that operate flights from Incheon Intl to Seattle. 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 July 28, 2026.
AirlineCheapestAverageFlexibilityOn-time
Hawaiian AirlinesCheapest$351Average$866FlexibilityNo cancel feeOn-time85%
Korean AirCheapest$464Average$744FlexibilityNo cancel feeOn-time81%
Air CanadaCheapest$472Average$518FlexibilityNo cancel feeOn-time67%
Alaska AirlinesCheapest$476Average$695FlexibilityNo cancel feeOn-time75%
DeltaCheapest$484Average$732FlexibilityNo cancel feeOn-timeN/A
Asiana AirlinesCheapest$512Average$615FlexibilityNo cancel feeOn-time76%

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