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$319+ 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 3/5. Fares are subject to change and may not be available on all flights or dates of travel.
ICN — SEA
Feb 23 — Mar 21
Mon 2/23
Mon 3/2
1 adult, Economy
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Cheapflights Tip: The best prices from Incheon Intl to Seattle/Tacoma Intl are usually found in November or December, booked 77 days in advance, depart on a Thursday or Monday 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 January 24, 2026.

This Hanatour deal was found by Cheapflights users on 1/23. 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 Hanatour is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/295:45 pm
ICN
-
SEA
1 stop13h 18m
Air Canada
Mon 5/49:55 am
SEA
-
ICN
1 stop14h 10m
Air Canada
Deal found 1/23$421
This Mytrip deal was found by Cheapflights users on 1/22. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/14:05 pm
ICN
-
SEA
2 stops38h 15m
Multiple Airlines
Thu 6/183:00 pm
SEA
-
ICN
1 stop33h 05m
Multiple Airlines
Deal found 1/22$439
This Mytrip deal was found by Cheapflights users on 1/21. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/27:55 am
ICN
-
SEA
2 stops41h 20m
Multiple Airlines
Sun 6/73:00 pm
SEA
-
ICN
1 stop33h 05m
Multiple Airlines
Deal found 1/21$441
This Gotogate deal was found by Cheapflights users on 1/23. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/1310:45 am
ICN
-
SEA
2 stops19h 35m
Multiple Airlines
Thu 5/215:40 am
SEA
-
ICN
1 stop18h 25m
Multiple Airlines
Deal found 1/23$446
This Mytrip deal was found by Cheapflights users on 1/23. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/35:45 pm
ICN
-
SEA
1 stop16h 45m
Multiple Airlines
Tue 6/239:55 am
SEA
-
ICN
2 stops20h 20m
Multiple Airlines
Deal found 1/23$447
This Mytrip deal was found by Cheapflights users on 1/22. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/17:55 am
ICN
-
SEA
2 stops22h 21m
Multiple Airlines
Thu 11/193:05 pm
SEA
-
ICN
1 stop33h 05m
Multiple Airlines
Deal found 1/22$451
This Hanatour deal was found by Cheapflights users on 1/22. 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 Hanatour is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/35:45 pm
ICN
-
SEA
1 stop16h 51m
Air Canada
Fri 11/205:45 am
SEA
-
ICN
1 stop18h 25m
Air Canada
Deal found 1/22$458
This Air Canada deal was found by Cheapflights users on 1/22. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/205:55 pm
ICN
-
SEA
1 stop21h 11m
Air Canada
Sun 2/228:00 pm
SEA
-
ICN
1 stop28h 10m
Air Canada
Deal found 1/22$459
This WhyPayMore deal was found by Cheapflights users on 1/23. 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 WhyPayMore is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/155:45 pm
ICN
-
SEA
1 stop12h 35m
Air Canada
Fri 6/55:40 am
SEA
-
ICN
1 stop18h 25m
Air Canada
Deal found 1/23$460
This Air Canada deal was found by Cheapflights users on 1/23. 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 5/135:45 pm
ICN
-
SEA
1 stop12h 35m
Air Canada
Thu 5/217:20 pm
SEA
-
ICN
1 stop28h 45m
Air Canada
Deal found 1/23$462

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 January 24, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

Gurufare
3 stars

Round-trip from

$421
(Hanatour)

One-way from

$319
(Vliegwinkel)

Popular in

July

Cheapest in

November

Average price

$799

Good round-trip deal

$681 or less

Good one-way deal

$631 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.
Search Deals
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. 16% potential increase in price ($141 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($25 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 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.
Search Deals

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 January 24, 2026.
Use the filters below to find and compare flights from Incheon Intl Airport to Seattle that are best for you.

Fly from

Incheon Intl

Fly to

Seattle

Route

Depart

Return

Price

IncheonSeattle

ICN - SEA

ICNSEA

Incheon Intl

Wed 5/13

10:45 am-2:20 pm

2 stops19h 35m

Seattle/Tacoma Intl

Thu 5/21

5:40 am-4:05 pm

1 stop18h 25m

$446

IncheonSeattle

ICN - SEA

ICNSEA

Incheon Intl

Wed 5/13

5:45 pm-6:30 pm

1 stop16h 45m

Seattle/Tacoma Intl

Thu 5/21

9:55 am-4:05 pm

1 stop14h 10m

$462

IncheonSeattle

ICN - SEA

ICNSEA

Incheon Intl

Sat 4/25

5:45 pm-3:03 pm

1 stop13h 18m

Seattle/Tacoma Intl

Fri 5/8

5:40 am-4:05 pm

1 stop18h 25m

$508

IncheonSeattle

ICN - SEA

ICNSEA

Incheon Intl

Sat 4/25

5:45 pm-3:03 pm

1 stop13h 18m

Seattle/Tacoma Intl

Fri 5/8

5:40 am-12:50 pm

2 stops39h 10m

$516

IncheonSeattle

ICN - SEA

ICNSEA

Incheon Intl

Wed 4/29

4:50 pm-9:46 pm

2 stops20h 56m

Seattle/Tacoma Intl

Mon 5/4

8:45 am-4:20 am

2 stops27h 35m

$564

IncheonSeattle

ICN - SEA

ICNSEA

Incheon Intl

Fri 2/6

12:45 pm-11:16 pm

2 stops27h 31m

Seattle/Tacoma Intl

Wed 2/18

9:19 am-4:15 pm

1 stop37h 56m

$564

IncheonSeattle

ICN - SEA

ICNSEA

Incheon Intl

Thu 3/5

6:00 pm-11:16 pm

2 stops22h 16m

Seattle/Tacoma Intl

Sat 3/14

5:20 pm-3:15 pm

1 stop29h 55m

$564

IncheonSeattle

ICN - SEA

ICNSEA

Incheon Intl

Tue 2/3

12:45 pm-4:29 pm

2 stops20h 44m

Seattle/Tacoma Intl

Mon 2/23

6:04 pm-4:15 pm

2 stops29h 11m

$564

IncheonSeattle

ICN - SEA

ICNSEA

Incheon Intl

Thu 2/5

12:45 pm-12:59 am

1 stop29h 14m

Seattle/Tacoma Intl

Thu 2/26

5:05 am-4:15 pm

1 stop18h 10m

$564

IncheonSeattle

ICN - SEA

ICNSEA

Incheon Intl

Tue 6/16

10:40 am-2:20 pm

2 stops19h 40m

Seattle/Tacoma Intl

Sat 9/12

7:45 pm-12:40 pm

2 stops24h 55m

$669

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/23

Showing 1-10 of 21 results
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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 January.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
AranGrantPrice Accuracy2 starsTrust Score*3 stars
GurufarePrice Accuracy2 starsTrust Score*3 stars
CheapflightsfaresPrice Accuracy3 starsTrust Score*2 stars
JetabroadPrice Accuracy3 starsTrust Score*1 star

*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 FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Incheon Intl Airport-Seattle flight deals on Cheapflights vs. FlightHub >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 Gurufare the most. Gurufare 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?

Use this chart to determine the optimal time to book a round-trip flight from Incheon Intl to Seattle. Price data was last updated on January 16, 2026.

To ensure you get the cheapest price possible for a flight from Incheon Intl Airport to Seattle, you should look to book at least 77 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 $338). Flying from Incheon Intl Airport to Seattle in August is currently the most expensive (average of $666). 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 January 24, 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?

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 January 24, 2026.
See what other customers who have flown with Korean Air, Asiana Airlines, and Alaska 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
1,188 reviews

Boarding

8.5

Comfort

8.3

Overall

8.4

Crew

8.7

Food

8.1

Entertainment

8.2

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
1,188 reviews
Korean Air
8.4
Very good
1,188 reviews

Boarding

8.5

Comfort

8.3

Overall

8.4

Crew

8.7

Food

8.1

Entertainment

8.2

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
501 reviews
Korean Air
8.4
Very good
1,188 reviews

Boarding

8.5

Comfort

8.3

Overall

8.4

Crew

8.7

Food

8.1

Entertainment

8.2

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
11,787 reviews
Korean Air
8.4
Very good
1,188 reviews

Boarding

8.5

Comfort

8.3

Overall

8.4

Crew

8.7

Food

8.1

Entertainment

8.2

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
8,112 reviews
Korean Air
8.4
Very good
1,188 reviews

Boarding

8.5

Comfort

8.3

Overall

8.4

Crew

8.7

Food

8.1

Entertainment

8.2

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
2,829 reviews
Korean Air
8.4
Very good
1,188 reviews

Boarding

8.5

Comfort

8.3

Overall

8.4

Crew

8.7

Food

8.1

Entertainment

8.2

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 8 daily inbound flights from Incheon Intl from 5 different airlines.

  • How popular is this Incheon Intl Airport to Seattle flight route?

    This flight path from Incheon Intl to Seattle/Tacoma Intl 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 Seattle?

    There are many flights that can get you from Incheon Intl Airport to Seattle in 16h 45m. Fly via Air Canada to get the fastest option. The distance from Incheon Intl Airport to Seattle is about 5200 mi.

  • 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 Asiana Airlines and Korean Air, with the lowest prices starting at $466 and $469, respectively. Hawaiian Airlines is priced at 49% 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 Hawaiian Airlines, with whom users have recently found tickets for as low as $309. However, be on the lookout for offers from Air Canada 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 (74%), Korean Air (74%), Alaska Airlines( 67%).

  • 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 $1,622, our data indicates the cheapest price to be $486. The most popular route (Incheon Intl - Seattle/Tacoma Intl), is priced around $439.

  • 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 $338). Flying from Incheon Intl Airport to Seattle in August is currently the most expensive (average of $666). 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?

Book flights to Seattle if you plan to visit one of these locations
Tacoma
SeaTac
Lakewood
Ocean Shores
Olympia
Lynnwood
Lacey
Edmonds
Renton
Puyallup
Kirkland
Kent
Tukwila
Fife
Aberdeen
Shoreline
Marysville
Centralia
Federal Way
Chehalis

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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
Gimpo Intl to Portland flights
Incheon Intl to Spokane flights

Top 5 airlines flying from Incheon Intl to Seattle

Discover the top 5 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 January 24, 2026.
AirlineCheapestAverageFlexibilityOn-time
Hawaiian AirlinesCheapest$351Average$866FlexibilityNo cancel feeOn-time85%
Asiana AirlinesCheapest$466Average$650FlexibilityNo cancel feeOn-time76%
Korean AirCheapest$469Average$724FlexibilityNo cancel feeOn-time81%
Alaska AirlinesCheapest$476Average$583FlexibilityNo cancel feeOn-time75%
DeltaCheapest$606Average$667FlexibilityNo cancel feeOn-timeN/A

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