HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Seattle

$410+ 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 10/8. Fares are subject to change and may not be available on all flights or dates of travel.
ICN — SEA
Jun 17 — Jun 241
Selasa 6/17
Selasa 6/24
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Incheon Intl to Seattle with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheapflights Tip: The best prices from Incheon Intl to Seattle/Tacoma Intl are usually found in May or April, booked 52 days in advance, depart on a Tuesday or Wednesday 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 Jun 12, 2025.

Round-trip from

$518
(United Airlines)

One-way from

$458
(Kiwi.com)

Popular in

August

Cheapest in

May

Average price

$734

Good round-trip deal

$645 or less

Good one-way deal

$604 or less
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. 28% potential increase in price ($345 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease ($52 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 2025
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

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 Jun 12, 2025.

This Trip.com deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Jumaat 6/134:50 pmICN - SEA
1 stop24h 09mUnited Airlines
Ahad 6/295:10 amSEA - ICN
1 stop31h 10mUnited Airlines
Deal found 6/11$509
This WhyPayMore deal was found by Cheapflights users on 6/12. 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.
Jumaat 9/198:35 pmICN - SEA
Nonstop10h 10mHawaiian Airlines
Sabtu 9/272:50 pmSEA - ICN
Nonstop11h 45mHawaiian Airlines
Deal found 6/12$547
This Gotogate deal was found by Cheapflights users on 6/10. 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.
Khamis 9/115:45 pmICN - SEA
1 stop31h 36mAir Canada
Ahad 9/281:45 pmSEA - ICN
1 stop34h 20mAir Canada
Deal found 6/10$558
This FlightHub deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Jumaat 9/126:20 pmICN - SEA
Nonstop10h 10mAsiana Airlines
Selasa 3/1012:10 amSEA - ICN
Nonstop12h 10mAsiana Airlines
Deal found 6/12$571
This Alaska Airlines deal was found by Cheapflights users on 6/10. 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.
Ahad 11/28:35 pmICN - SEA
Nonstop10h 20mAlaska Airlines
Khamis 11/68:05 amSEA - ICN
1 stop18h 20mAlaska Airlines
Deal found 6/10$588
This Gotogate deal was found by Cheapflights users on 6/12. 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.
Rabu 12/244:10 pmICN - SEA
Nonstop9h 50mKorean Air
Isnin 12/2911:00 amSEA - ICN
Nonstop11h 55mKorean Air
Deal found 6/12$590
This deal was found by Cheapflights users on 6/12. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Isnin 10/278:05 pmICN - SEA
Nonstop10h 15mDelta
Selasa 11/411:15 amSEA - ICN
Nonstop12h 15mDelta
Deal found 6/12$600
This Gotogate deal was found by Cheapflights users on 6/11. 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.
Khamis 6/269:10 amICN - SEA
2 stops21h 06mMultiple Airlines
Khamis 7/37:15 pmSEA - ICN
1 stop28h 50mMultiple Airlines
Deal found 6/11$661

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 Jun 12, 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

Rabu 8/27

11:30 am-10:59 pm

1 stop27h 29m

Seattle/Tacoma Intl

Sabtu 9/27

11:10 am-4:20 am

2 stops25h 10m

$518

IncheonSeattle

ICN - SEA

ICNSEA

Incheon Intl

Jumaat 9/19

8:35 pm-2:45 pm

Nonstop10h 10m

Seattle/Tacoma Intl

Sabtu 9/27

2:50 pm-6:35 pm

Nonstop11h 45m

$547

IncheonSeattle

ICN - SEA

ICNSEA

Incheon Intl

Khamis 9/11

5:45 pm-9:21 am

1 stop31h 36m

Seattle/Tacoma Intl

Ahad 9/28

1:45 pm-4:05 pm

1 stop34h 20m

$558

IncheonSeattle

ICN - SEA

ICNSEA

Incheon Intl

Jumaat 9/12

6:20 pm-12:30 pm

Nonstop10h 10m

Seattle/Tacoma Intl

Selasa 3/10

12:10 am-4:20 am

Nonstop12h 10m

$571

IncheonSeattle

ICN - SEA

ICNSEA

Incheon Intl

Ahad 11/2

8:35 pm-1:55 pm

Nonstop10h 20m

Seattle/Tacoma Intl

Khamis 11/6

8:05 am-7:25 pm

1 stop18h 20m

$588

IncheonSeattle

ICN - SEA

ICNSEA

Incheon Intl

Isnin 10/27

8:05 pm-2:20 pm

Nonstop10h 15m

Seattle/Tacoma Intl

Selasa 11/4

11:15 am-4:30 pm

Nonstop12h 15m

$600

IncheonSeattle

ICN - SEA

ICNSEA

Incheon Intl

Isnin 7/7

4:40 pm-10:50 am

Nonstop10h 10m

Seattle/Tacoma Intl

Isnin 7/21

1:20 pm-4:40 pm

Nonstop11h 20m

$604

IncheonSeattle

ICN - SEA

ICNSEA

Incheon Intl

Khamis 6/26

9:10 am-2:16 pm

2 stops21h 06m

Seattle/Tacoma Intl

Khamis 7/3

7:15 pm-4:05 pm

1 stop28h 50m

$661

IncheonSeattle

ICN - SEA

ICNSEA

Incheon Intl

Rabu 10/8

10:35 pm-9:00 am

2 stops26h 25m

$410

IncheonSeattle

ICN - SEA

ICNSEA

Incheon Intl

Isnin 10/6

8:35 pm-2:35 pm

Nonstop10h 00m

$453

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/10

Showing 1-10 of 18 results
1
2

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

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 June 9, 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 52 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 $391). 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 Jun 12, 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 17% 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 Jun 12, 2025.

The most flights from ICN to SEA are scheduled on a Monday (8 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (7 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 Jun 12, 2025.
Read reviews from past customers who have flown EVA Air, Korean Air and China 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.
EVA Air
8.4
Very good
1,202 reviews

Comfort

8.3

Boarding

8.4

Entertainment

8.0

Food

8.1

Overall

8.4

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount
EVA Air
8.4
Very good
1,202 reviews
EVA Air
8.4
Very good
1,202 reviews

Comfort

8.3

Boarding

8.4

Entertainment

8.0

Food

8.1

Overall

8.4

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount
Korean Air
8.4
Very good
1,088 reviews
EVA Air
8.4
Very good
1,202 reviews

Comfort

8.3

Boarding

8.4

Entertainment

8.0

Food

8.1

Overall

8.4

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount
China Airlines
8.3
Very good
738 reviews
EVA Air
8.4
Very good
1,202 reviews

Comfort

8.3

Boarding

8.4

Entertainment

8.0

Food

8.1

Overall

8.4

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount
Asiana Airlines
8.2
Very good
440 reviews
EVA Air
8.4
Very good
1,202 reviews

Comfort

8.3

Boarding

8.4

Entertainment

8.0

Food

8.1

Overall

8.4

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount
Alaska Airlines
8.0
Very good
10,000 reviews
EVA Air
8.4
Very good
1,202 reviews

Comfort

8.3

Boarding

8.4

Entertainment

8.0

Food

8.1

Overall

8.4

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount

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 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.

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

    Flying on United Airlines is currently your cheapest option to Seattle, with prices starting at $518. Additional round-trip tickets that might be worth considering are offered by Air Canada and Asiana Airlines, with the lowest prices starting at $561 and $579, respectively. United Airlines is priced at 39% 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 EVA Air, with whom users have recently found tickets for as low as $541. However, be on the lookout for offers from WestJet and Hawaiian 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: Thai Airways (67%), Asiana Airlines (67%), United 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 $1,568, our data indicates the cheapest price to be $471. The most popular route (Incheon Intl - Seattle/Tacoma Intl), is priced around $509.

  • 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 $391). 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
Lakewood
Ocean Shores
Lacey
Leavenworth
Federal Way
Lynnwood
Olympia
Shoreline
Kent
Cle Elum
Centralia
Kirkland
Aberdeen
Renton
Shelton
Silverdale
Issaquah

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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 Jun 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$474Average$752FlexibilityNo cancel feeOn-time67%
Korean AirCheapest$515Average$880FlexibilityNo cancel feeOn-time81%
United AirlinesCheapest$516Average$681FlexibilityNo cancel feeOn-time69%
Asiana AirlinesCheapest$549Average$838FlexibilityNo cancel feeOn-time76%
DeltaCheapest$646Average$1,003FlexibilityNo cancel feeOn-timeN/A

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.