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$451+ Cheap flights from Incheon Intl (ICN) to Seattle (SEA)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 5/13. Fares are subject to change and may not be available on all flights or dates of travel.
ICN — SEA
May 4 — May 111
Sun 5/4
Sun 5/11
1 adult, Economy
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Cheapflights Tip: The best prices from Incheon Intl to Seattle/Tacoma Intl are usually found in April or March, booked 76 days in advance, depart on a Tuesday or Thursday and return on a Monday

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 April 29, 2025.

Most accurate provider

AranGrant
3 stars

Most trusted provider

AranGrant
3 stars

Round-trip from

$451
(WhyPayMore)

Popular in

August

Cheapest in

April

Average price

$673

Good round-trip deal

$662 or less

Good one-way deal

$585 or less
Provider with most accurate pricing for Incheon Intl-Seattle/Tacoma Intl flight deals.
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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
Highest demand for flights based on searches. 25% potential increase in price ($312 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($48 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 2025
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Price to beat on a round-trip flight from Incheon Intl to Seattle/Tacoma Intl.
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Price to beat on a one-way flight from Incheon Intl to Seattle/Tacoma Intl.
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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 April 29, 2025.

This WhyPayMore deal was found by Cheapflights users on 4/29. 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.
Tue 5/136:20 pmICN - SEA
Nonstop10h 10mAsiana Airlines
Fri 6/62:15 pmSEA - ICN
Nonstop11h 40mAsiana Airlines
Deal found 4/29$451
This Mytrip deal was found by Cheapflights users on 4/29. 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 5/214:40 pmICN - SEA
Nonstop10h 00mKorean Air
Wed 6/111:20 pmSEA - ICN
Nonstop11h 20mKorean Air
Deal found 4/29$454
This United Airlines deal was found by Cheapflights users on 4/29. 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 5/44:50 pmICN - SEA
1 stop20h 41mUnited Airlines
Wed 5/79:00 amSEA - ICN
1 stop27h 20mUnited Airlines
Deal found 4/29$483
This Delta deal was found by Cheapflights users on 4/28. 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 5/134:00 pmICN - SEA
1 stop23h 18mDelta
Fri 6/61:20 pmSEA - ICN
Nonstop11h 20mDelta
Deal found 4/28$555
This Expedia deal was found by Cheapflights users on 4/27. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/125:45 pmICN - SEA
1 stop31h 36mAir Canada
Fri 9/1910:00 amSEA - ICN
1 stop14h 05mAir Canada
Deal found 4/27$559
This Tourvis deal was found by Cheapflights users on 4/28. 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 Tourvis is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/28:55 pmICN - SEA
1 stop15h 05mMultiple Airlines
Tue 6/32:15 pmSEA - ICN
Nonstop11h 40mMultiple Airlines
Deal found 4/28$561
This Gotogate deal was found by Cheapflights users on 4/29. 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 5/1410:35 pmICN - SEA
2 stops26h 25mHainan Airlines
Thu 5/2211:00 amSEA - ICN
2 stops42h 30mHainan Airlines
Deal found 4/29$691

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 April 29, 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

Tue 5/13

6:20 pm-12:30 pm

Nonstop10h 10m

Seattle/Tacoma Intl

Fri 6/6

2:15 pm-5:55 pm

Nonstop11h 40m

$451

IncheonSeattle

ICN - SEA

ICNSEA

Incheon Intl

Wed 5/21

4:40 pm-10:40 am

Nonstop10h 00m

Seattle/Tacoma Intl

Wed 6/11

1:20 pm-4:40 pm

Nonstop11h 20m

$454

IncheonSeattle

ICN - SEA

ICNSEA

Incheon Intl

Sun 5/4

11:30 am-9:57 pm

2 stops26h 27m

Seattle/Tacoma Intl

Tue 5/6

5:13 pm-3:00 pm

2 stops29h 47m

$483

IncheonSeattle

ICN - SEA

ICNSEA

Incheon Intl

Wed 6/4

8:40 pm-9:36 pm

1 stop16h 56m

Seattle/Tacoma Intl

Wed 6/11

2:15 pm-5:55 pm

Nonstop11h 40m

$552

IncheonSeattle

ICN - SEA

ICNSEA

Incheon Intl

Tue 5/13

4:00 pm-11:18 pm

1 stop23h 18m

Seattle/Tacoma Intl

Fri 6/6

1:20 pm-4:40 pm

Nonstop11h 20m

$555

IncheonSeattle

ICN - SEA

ICNSEA

Incheon Intl

Tue 5/20

5:45 pm-2:13 pm

1 stop12h 28m

Seattle/Tacoma Intl

Thu 5/22

10:00 am-4:05 pm

1 stop14h 05m

$690

IncheonSeattle

ICN - SEA

ICNSEA

Incheon Intl

Wed 5/14

10:35 pm-9:00 am

2 stops26h 25m

Seattle/Tacoma Intl

Thu 5/22

11:00 am-9:30 pm

2 stops42h 30m

$691

IncheonSeattle

ICN - SEA

ICNSEA

Incheon Intl

Sat 5/10

12:45 pm-8:42 pm

1 stop23h 57m

$519

IncheonSeattle

ICN - SEA

ICNSEA

Incheon Intl

Mon 5/5

6:20 pm-12:30 pm

Nonstop10h 10m

$522

IncheonSeattle

ICN - SEA

ICNSEA

Incheon Intl

Wed 7/2

10:35 pm-9:35 am

2 stops27h 00m

$531

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/29

Showing 1-10 of 17 results
1
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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 April.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*2 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy3 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 AranGrant to be most consistent on Cheapflights vs. AranGrant Users can find the same prices on Incheon Intl Airport-Seattle flight deals on Cheapflights vs. AranGrant >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 AranGrant the most. AranGrant 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.

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 from SEA to downtown Seattle for an affordable, 40-minute journey with ample luggage space.

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

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 April 25, 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 76 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, January is the cheapest month in which you can book a flight from Incheon Intl Airport to Seattle (average of $238). Flying from Incheon Intl Airport to Seattle in July is currently the most expensive (average of $405). 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 April 29, 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 in the afternoon tend to be the most expensive. A flight at noon could potentially save you up to 19% on airfare.

Weekly flight availability from Incheon Intl Airport to Seattle

Explore weekly flight availability from Incheon Intl to Seattle. 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 April 29, 2025.

The most flights from ICN to SEA are scheduled on a Monday (8 on average). You will have fewer flight options on Friday, which is when the least amount of flights are scheduled (5 on average).

Rainfall in Seattle by month

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

In terms of precipitation, rainfall in Seattle ranges from 0.7 - 6.6 inches per month. November is typically the wettest month, when rainfall can reach 6.6 in. July is typically the driest time to visit Seattle when rainfall is around 0.7 in.

Temperature in Seattle by month

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

If weather is an important factor for your trip to Seattle, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 66.2 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 41.0 F).

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 April 29, 2025.
Read reviews from past customers who have flown Korean Air, China Airlines and Asiana Airlines from Seoul to Seattle. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Korean Air
8.4
Very good
1,066 reviews

Food

8.1

Overall

8.4

Crew

8.7

Comfort

8.3

Boarding

8.5

Entertainment

8.2

Reviews

1 / 20
6.0
Good

Anonymous,Feb 2025

ATL - SBN

Regional jets are small and uncomfortable. When flying in or out of South Bend airport, that's usually what I'm on. It's the price one pays for the great convenience of using a small airport (cheap parking, no lines). The CRJ900 has engines attached to the fuselage near the rear of the plane. So, very loud in the back of the plane, and I happened to have the far back corner that also had no window. Oh well, a short flight and pleasant neighbor and cheerful attendant.
Korean Air
8.4
Very good
1,066 reviews
Korean Air
8.4
Very good
1,066 reviews

Food

8.1

Overall

8.4

Crew

8.7

Comfort

8.3

Boarding

8.5

Entertainment

8.2

Reviews

1 / 20
6.0
Good

Anonymous,Feb 2025

ATL - SBN

Regional jets are small and uncomfortable. When flying in or out of South Bend airport, that's usually what I'm on. It's the price one pays for the great convenience of using a small airport (cheap parking, no lines). The CRJ900 has engines attached to the fuselage near the rear of the plane. So, very loud in the back of the plane, and I happened to have the far back corner that also had no window. Oh well, a short flight and pleasant neighbor and cheerful attendant.
China Airlines
8.3
Very good
729 reviews
Korean Air
8.4
Very good
1,066 reviews

Food

8.1

Overall

8.4

Crew

8.7

Comfort

8.3

Boarding

8.5

Entertainment

8.2

Reviews

1 / 20
6.0
Good

Anonymous,Feb 2025

ATL - SBN

Regional jets are small and uncomfortable. When flying in or out of South Bend airport, that's usually what I'm on. It's the price one pays for the great convenience of using a small airport (cheap parking, no lines). The CRJ900 has engines attached to the fuselage near the rear of the plane. So, very loud in the back of the plane, and I happened to have the far back corner that also had no window. Oh well, a short flight and pleasant neighbor and cheerful attendant.
Asiana Airlines
8.2
Very good
442 reviews
Korean Air
8.4
Very good
1,066 reviews

Food

8.1

Overall

8.4

Crew

8.7

Comfort

8.3

Boarding

8.5

Entertainment

8.2

Reviews

1 / 20
6.0
Good

Anonymous,Feb 2025

ATL - SBN

Regional jets are small and uncomfortable. When flying in or out of South Bend airport, that's usually what I'm on. It's the price one pays for the great convenience of using a small airport (cheap parking, no lines). The CRJ900 has engines attached to the fuselage near the rear of the plane. So, very loud in the back of the plane, and I happened to have the far back corner that also had no window. Oh well, a short flight and pleasant neighbor and cheerful attendant.
Hainan Airlines
8.1
Very good
38 reviews
Korean Air
8.4
Very good
1,066 reviews

Food

8.1

Overall

8.4

Crew

8.7

Comfort

8.3

Boarding

8.5

Entertainment

8.2

Reviews

1 / 20
6.0
Good

Anonymous,Feb 2025

ATL - SBN

Regional jets are small and uncomfortable. When flying in or out of South Bend airport, that's usually what I'm on. It's the price one pays for the great convenience of using a small airport (cheap parking, no lines). The CRJ900 has engines attached to the fuselage near the rear of the plane. So, very loud in the back of the plane, and I happened to have the far back corner that also had no window. Oh well, a short flight and pleasant neighbor and cheerful attendant.
Singapore Airlines
8.1
Very good
1,292 reviews
Korean Air
8.4
Very good
1,066 reviews

Food

8.1

Overall

8.4

Crew

8.7

Comfort

8.3

Boarding

8.5

Entertainment

8.2

Reviews

1 / 20
6.0
Good

Anonymous,Feb 2025

ATL - SBN

Regional jets are small and uncomfortable. When flying in or out of South Bend airport, that's usually what I'm on. It's the price one pays for the great convenience of using a small airport (cheap parking, no lines). The CRJ900 has engines attached to the fuselage near the rear of the plane. So, very loud in the back of the plane, and I happened to have the far back corner that also had no window. Oh well, a short flight and pleasant neighbor and cheerful attendant.

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 6 daily inbound flights from Incheon Intl from 6 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.

  • 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 $451. Additional round-trip tickets that might be worth considering are offered by Korean Air and United Airlines, with the lowest prices starting at $454 and $483, respectively. Asiana Airlines is priced at 51% 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 Asiana Airlines, with whom users have recently found tickets for as low as $522. However, be on the lookout for offers from Hainan Airlines and WestJet, 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 (58%), Korean Air (58%), Thai Airways( 34%).

  • 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 $1,235, our data indicates the cheapest price to be $455. The most popular route (Incheon Intl - Seattle/Tacoma Intl), is priced around $451.

  • 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, January is the cheapest month in which you can book a flight from Incheon Intl Airport to Seattle (average of $238). Flying from Incheon Intl Airport to Seattle in July is currently the most expensive (average of $405). 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 Incheon Intl Airport?

Book flights to Incheon Intl Airport if you plan to visit one of these locations
SeaTac
Tukwila
Tacoma
Renton
Lakewood
Ocean Shores
Lacey
Leavenworth
Federal Way
Olympia
Shoreline
Cle Elum
Centralia
Kent
Aberdeen
Lynnwood
Shelton
Silverdale
Redmond
Issaquah

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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
Incheon Intl to Spokane flights
Gimpo 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 April 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$474Average$752FlexibilityNo cancel feeOn-time67%
Korean AirCheapest$515Average$1,051FlexibilityNo cancel feeOn-time81%
United AirlinesCheapest$516Average$860FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$538Average$718FlexibilityNo cancel feeOn-time71%
Asiana AirlinesCheapest$641Average$985FlexibilityNo cancel feeOn-time76%
DeltaCheapest$667Average$1,078FlexibilityNo cancel feeOn-timeN/A

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