Seattle

$308+ 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 11/25. Fares are subject to change and may not be available on all flights or dates of travel.
ICN — SEA
Nov 26 — Dec 31
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1. Tell us where you want to go

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Cheapflights Tip: The best prices from Incheon Intl to Seattle/Tacoma Intl are usually found in May or June, booked 28 days in advance, depart on a Sunday or Monday and return on a Wednesday

Cheap 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 October 27, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$348
(WhyPayMore)

One-way from

$308
(Kiwi.com)

Popular in

July

Cheapest in

May

Average price

$652

Good round-trip deal

$560 or less

Good one-way deal

$403 or less
Provider with most accurate pricing for Incheon Intl-Seattle/Tacoma Intl flight deals.
Provider most trusted by Cheapflights users for Incheon Intl-Seattle/Tacoma Intl flights.
From Incheon Intl to Seattle/Tacoma Intl
One-way flight from Incheon Intl to Seattle/Tacoma Intl
Highest demand for flights based on searches. 13% potential increase in price ($117 potential increase over avg. RT price).
Cheapest flight prices on average. 3% potential price decrease ($22 potential savings vs. average RT price).
Average for round-trip flights in October 2025
Price to beat on a round-trip flight from Incheon Intl to Seattle/Tacoma Intl.
Price to beat on a one-way flight from Incheon Intl to Seattle/Tacoma Intl.

Find 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 October 27, 2025.

This WhyPayMore deal was found by Cheapflights users on 10/25. 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 10/278:35 pmICN - SEA
Nonstop10h 20mHawaiian Airlines
Fri 10/312:45 pmSEA - ICN
Nonstop11h 50mHawaiian Airlines
Deal found 10/25$348
This Jetabroad deal was found by Cheapflights users on 10/26. 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 Jetabroad is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/28:35 pmICN - SEA
Nonstop10h 20mHawaiian Airlines
Sun 11/91:45 pmSEA - ICN
Nonstop11h 50mHawaiian Airlines
Deal found 10/26$350
This WhyPayMore deal was found by Cheapflights users on 10/26. 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.
Sun 10/269:25 pmICN - SEA
1 stop18h 07mHawaiian Airlines
Sun 11/98:00 amSEA - ICN
1 stop18h 25mHawaiian Airlines
Deal found 10/26$354
This Hanatour deal was found by Cheapflights users on 10/24. 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 Hanatour is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/278:35 pmICN - SEA
Nonstop10h 20mHawaiian Airlines
Mon 11/312:45 pmSEA - ICN
1 stop37h 40mHawaiian Airlines
Deal found 10/24$355
This Jetabroad deal was found by Cheapflights users on 10/27. 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 Jetabroad is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/109:25 pmICN - SEA
1 stop17h 32mHawaiian Airlines
Mon 11/173:55 pmSEA - ICN
1 stop34h 30mHawaiian Airlines
Deal found 10/27$364
This WhyPayMore deal was found by Cheapflights users on 10/26. 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.
Fri 11/78:35 pmICN - SEA
Nonstop10h 20mHawaiian Airlines
Sat 11/153:55 pmSEA - ICN
1 stop34h 30mHawaiian Airlines
Deal found 10/26$365
This Alaska Airlines deal was found by Cheapflights users on 10/25. 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.
Fri 10/318:35 pmICN - SEA
Nonstop10h 20mAlaska Airlines
Sat 4/112:40 pmSEA - ICN
Nonstop11h 55mAlaska Airlines
Deal found 10/25$424
This Hanatour deal was found by Cheapflights users on 10/24. 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 Hanatour is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/274:10 pmICN - SEA
Nonstop9h 50mKorean Air
Mon 11/311:00 amSEA - ICN
Nonstop11h 55mKorean Air
Deal found 10/24$429
This Alaska Airlines deal was found by Cheapflights users on 10/24. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/278:35 pmICN - SEA
Nonstop10h 20mAlaska Airlines
Mon 11/36:07 pmSEA - ICN
2 stops32h 18mAlaska Airlines
Deal found 10/24$430
This Alaska Airlines deal was found by Cheapflights users on 10/26. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/269:25 pmICN - SEA
2 stops25h 44mAlaska Airlines
Sun 11/97:00 amSEA - ICN
1 stop19h 25mAlaska Airlines
Deal found 10/26$439
This United Airlines deal was found by Cheapflights users on 10/25. 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 10/315:05 pmICN - SEA
2 stops20h 08mUnited Airlines
Sat 4/117:32 pmSEA - ICN
1 stop16h 48mUnited Airlines
Deal found 10/25$444

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 October 27, 2025.
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

Sat 11/8

9:00 pm-1:55 pm

Nonstop9h 55m

Seattle/Tacoma Intl

Mon 11/10

12:10 am-5:20 am

Nonstop12h 10m

$523

IncheonSeattle

ICN - SEA

ICNSEA

Incheon Intl

Fri 12/26

12:45 pm-8:23 am

1 stop36h 38m

Seattle/Tacoma Intl

Wed 1/14

9:00 am-5:40 am

2 stops27h 40m

$527

IncheonSeattle

ICN - SEA

ICNSEA

Incheon Intl

Wed 11/12

12:45 pm-9:13 pm

3 stops25h 28m

Seattle/Tacoma Intl

Sun 11/23

7:28 pm-4:15 pm

1 stop27h 47m

$527

IncheonSeattle

ICN - SEA

ICNSEA

Incheon Intl

Fri 12/26

6:00 pm-8:23 am

1 stop31h 23m

Seattle/Tacoma Intl

Fri 1/16

5:00 am-5:40 am

2 stops31h 40m

$527

IncheonSeattle

ICN - SEA

ICNSEA

Incheon Intl

Sat 12/13

12:45 pm-12:18 pm

1 stop16h 33m

Seattle/Tacoma Intl

Wed 12/31

7:12 pm-5:40 am

1 stop17h 28m

$527

IncheonSeattle

ICN - SEA

ICNSEA

Incheon Intl

Wed 12/17

6:00 pm-6:28 pm

1 stop17h 28m

Seattle/Tacoma Intl

Sat 3/28

5:20 pm-3:00 pm

1 stop29h 40m

$528

IncheonSeattle

ICN - SEA

ICNSEA

Incheon Intl

Sun 11/23

12:45 pm-1:38 pm

1 stop17h 53m

Seattle/Tacoma Intl

Fri 1/30

12:24 pm-5:40 am

2 stops24h 16m

$541

IncheonSeattle

ICN - SEA

ICNSEA

Incheon Intl

Mon 12/22

12:45 pm-12:59 am

1 stop29h 14m

Seattle/Tacoma Intl

Mon 1/12

12:24 pm-4:15 pm

2 stops34h 51m

$560

IncheonSeattle

ICN - SEA

ICNSEA

Incheon Intl

Thu 11/6

8:35 pm-1:55 pm

Nonstop10h 20m

Seattle/Tacoma Intl

Thu 11/13

8:00 am-7:25 pm

1 stop18h 25m

$576

IncheonSeattle

ICN - SEA

ICNSEA

Incheon Intl

Sun 11/9

9:25 pm-11:21 pm

1 stop18h 56m

Seattle/Tacoma Intl

Wed 11/26

1:40 pm-6:35 pm

Nonstop11h 55m

$582

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/26

Showing 1-10 of 24 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 October.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
AranGrantPrice Accuracy2 starsTrust Score*3 stars
CheapflightsfaresPrice Accuracy3 starsTrust Score*2 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 eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Incheon Intl Airport-Seattle flight deals on Cheapflights vs. eDreams >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 eDreams the most. eDreams 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 October 24, 2025.

To ensure you get the cheapest price possible for a flight from Incheon Intl Airport to Seattle, you should look to book at least 28 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 $341). Flying from Incheon Intl Airport to Seattle in August is currently the most expensive (average of $670). 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 October 27, 2025.

One of the essential ways to save on airfare from Incheon Intl Airport to Seattle is to remain as flexible as possible. Flights that are at noon tend to be the most expensive. A flight in the afternoon could potentially save you up to 56% on airfare.

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

Snippets provided in this section are AI-generated based on a summarization of Cheapflights-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.
Cheapflights partnered with top experts to bring you the best recommendations for your Incheon Intl Airport to Seattle trip
Airports
ICN

Plan for extra time at ICN as security lines can take up to 20 minutes, especially without fast track options.

Read more about ICNby Gabriel Leigh
SEA

Use the Link light rail for a cost-effective, 40-minute ride from SEA to downtown Seattle.

Read more about SEAby Brandon Schultz
Our travel experts
Gabriel Leigh

Gabriel Leigh

Expert on ICN

Gabriel Leigh

Gabriel Leigh

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

Brandon Schultz

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 October 27, 2025.
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.

Crew

8.7

Entertainment

8.2

Food

8.1

Overall

8.4

Comfort

8.3

Boarding

8.5

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!!

Crew

8.7

Entertainment

8.2

Food

8.1

Overall

8.4

Comfort

8.3

Boarding

8.5

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!!

Crew

8.7

Entertainment

8.2

Food

8.1

Overall

8.4

Comfort

8.3

Boarding

8.5

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!!

Crew

8.7

Entertainment

8.2

Food

8.1

Overall

8.4

Comfort

8.3

Boarding

8.5

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!!

Crew

8.7

Entertainment

8.2

Food

8.1

Overall

8.4

Comfort

8.3

Boarding

8.5

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!!

Crew

8.7

Entertainment

8.2

Food

8.1

Overall

8.4

Comfort

8.3

Boarding

8.5

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 popular is this Incheon Intl Airport to Seattle flight route?

  • 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 9h 55m. Fly via Asiana Airlines or United Airlines 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 Asiana Airlines is currently your cheapest option to Seattle, with prices starting at $468. Additional round-trip tickets that might be worth considering are offered by Korean Air and Air Canada, with the lowest prices starting at $470 and $472, respectively. Asiana Airlines is priced at 35% lower than the current average price of a flight leaving 3 months from now.

  • 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: Alaska Airlines (55%), Hawaiian Airlines (55%), Delta( 53%).

  • 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 $1,385, our data indicates the cheapest price to be $264. The most popular route (Incheon Intl - Seattle/Tacoma Intl), is priced around $337.

  • 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 $341). Flying from Incheon Intl Airport to Seattle in August is currently the most expensive (average of $670). 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
SeaTac
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Tacoma
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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.

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 October 27, 2025.
AirlineCheapestAverageFlexibilityOn-time
Asiana AirlinesCheapest$468Average$679FlexibilityNo cancel feeOn-time76%
Korean AirCheapest$470Average$743FlexibilityNo cancel feeOn-time81%
Air CanadaCheapest$472Average$727FlexibilityNo cancel feeOn-time67%
Alaska AirlinesCheapest$476Average$556FlexibilityNo cancel feeOn-time75%
Hawaiian AirlinesCheapest$485Average$866FlexibilityNo cancel feeOn-time85%
DeltaCheapest$618Average$721FlexibilityNo cancel feeOn-timeN/A

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