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$337+ Cheap flights from Incheon Intl (ICN) to Seattle (SEA)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/17. Fares are subject to change and may not be available on all flights or dates of travel.
ICN — SEA
Aug 2 — Aug 91
Sat 8/2
Sat 8/9
1 adult, Economy
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Cheapflights Tip: The best prices from Incheon Intl to Seattle/Tacoma Intl are usually found in June or May, booked 65 days in advance, depart on a Wednesday or Tuesday 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 July 28, 2025.

Round-trip from

$507
(Hawaiian Airlines)

One-way from

$337
(Kiwi.com)

Popular in

August

Cheapest in

June

Average price

$1,046

Good round-trip deal

$623 or less

Good one-way deal

$621 or less
From Incheon Intl to Seattle/Tacoma Intl
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One-way flight from Incheon Intl to Seattle/Tacoma Intl
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Highest demand for flights based on searches. 26% potential increase in price ($294 potential increase over avg. RT price).
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Cheapest flight prices on average. 6% potential price decrease ($47 potential savings vs. average RT price).
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Average for round-trip flights in July 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 July 28, 2025.

This Hawaiian Airlines deal was found by Cheapflights users on 7/28. 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 Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/258:35 pmICN - SEA
Nonstop10h 00mHawaiian Airlines
Sat 11/151:45 pmSEA - ICN
Nonstop11h 50mHawaiian Airlines
Deal found 7/28$507
This Alaska Airlines deal was found by Cheapflights users on 7/27. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/18:35 pmICN - SEA
Nonstop10h 20mAlaska Airlines
Sat 11/88:00 amSEA - ICN
1 stop18h 25mAlaska Airlines
Deal found 7/27$515
This WhyPayMore deal was found by Cheapflights users on 7/28. 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 WhyPayMore is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/146:20 pmICN - SEA
Nonstop10h 10mAsiana Airlines
Tue 10/212:15 pmSEA - ICN
Nonstop11h 40mAsiana Airlines
Deal found 7/28$517
This United Airlines deal was found by Cheapflights users on 7/27. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/2412:45 pmICN - SEA
3 stops25h 32mUnited Airlines
Fri 1/236:30 amSEA - ICN
2 stops30h 10mUnited Airlines
Deal found 7/27$523

Cheapflights Fare Finder

 
Customize your flight search to find flights from Incheon Intl to Seattle that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 28, 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 10/25

8:35 pm-2:35 pm

Nonstop10h 00m

Seattle/Tacoma Intl

Sun 12/7

1:40 pm-6:35 pm

Nonstop11h 55m

$507

IncheonSeattle

ICN - SEA

ICNSEA

Incheon Intl

Sat 9/13

8:35 pm-2:45 pm

Nonstop10h 10m

Seattle/Tacoma Intl

Fri 9/26

2:50 pm-6:35 pm

Nonstop11h 45m

$511

IncheonSeattle

ICN - SEA

ICNSEA

Incheon Intl

Tue 10/14

6:20 pm-12:30 pm

Nonstop10h 10m

Seattle/Tacoma Intl

Tue 10/21

2:15 pm-5:55 pm

Nonstop11h 40m

$517

IncheonSeattle

ICN - SEA

ICNSEA

Incheon Intl

Wed 9/17

11:30 am-10:59 pm

1 stop27h 29m

Seattle/Tacoma Intl

Mon 10/20

7:37 pm-4:20 am

1 stop16h 43m

$523

IncheonSeattle

ICN - SEA

ICNSEA

Incheon Intl

Wed 9/17

6:20 pm-11:42 pm

1 stop21h 22m

$337

IncheonSeattle

ICN - SEA

ICNSEA

Incheon Intl

Wed 10/15

9:50 pm-9:00 am

2 stops27h 10m

$410

IncheonSeattle

ICN - SEA

ICNSEA

Incheon Intl

Thu 10/23

8:45 pm-7:14 pm

1 stop14h 29m

$412

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/28

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 July 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 65 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 June is currently the most expensive (average of $389). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from ICN to SEA?

Find hourly flight availability from Incheon Intl to Seattle. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated July 28, 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 morning 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 July 28, 2025.

The most flights from ICN to SEA are scheduled on a Monday (8 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (7 on average).

Reviews of airlines servicing Seattle

Get insights into the airlines that provide service to Seattle. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Seattle. Reviews last updated July 28, 2025.
See what other customers who have flown with Asiana Airlines, Hainan 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.
Asiana Airlines
8.2
Very good
463 reviews

Crew

8.5

Food

8.0

Entertainment

7.7

Boarding

8.4

Overall

8.2

Comfort

8.1

Reviews

1 / 20
10.0
Excellent

Jacob,Jul 2025

ICN - JFK

I flew business calls Asiana, everything was great and good! I must say that the service at the Asian business class lounge prior to the flight is very poor, the staff are very cold and not welcome and I asked for some help in getting a food without salt ...I was looked upon as if I ... I am traveling a lot business , and I se people complained a lot in asiana lounge services. Jacob
Asiana Airlines
8.2
Very good
463 reviews
Asiana Airlines
8.2
Very good
463 reviews

Crew

8.5

Food

8.0

Entertainment

7.7

Boarding

8.4

Overall

8.2

Comfort

8.1

Reviews

1 / 20
10.0
Excellent

Jacob,Jul 2025

ICN - JFK

I flew business calls Asiana, everything was great and good! I must say that the service at the Asian business class lounge prior to the flight is very poor, the staff are very cold and not welcome and I asked for some help in getting a food without salt ...I was looked upon as if I ... I am traveling a lot business , and I se people complained a lot in asiana lounge services. Jacob
Hainan Airlines
8.2
Very good
42 reviews
Asiana Airlines
8.2
Very good
463 reviews

Crew

8.5

Food

8.0

Entertainment

7.7

Boarding

8.4

Overall

8.2

Comfort

8.1

Reviews

1 / 20
10.0
Excellent

Jacob,Jul 2025

ICN - JFK

I flew business calls Asiana, everything was great and good! I must say that the service at the Asian business class lounge prior to the flight is very poor, the staff are very cold and not welcome and I asked for some help in getting a food without salt ...I was looked upon as if I ... I am traveling a lot business , and I se people complained a lot in asiana lounge services. Jacob
Alaska Airlines
8.0
Very good
10,000 reviews
Asiana Airlines
8.2
Very good
463 reviews

Crew

8.5

Food

8.0

Entertainment

7.7

Boarding

8.4

Overall

8.2

Comfort

8.1

Reviews

1 / 20
10.0
Excellent

Jacob,Jul 2025

ICN - JFK

I flew business calls Asiana, everything was great and good! I must say that the service at the Asian business class lounge prior to the flight is very poor, the staff are very cold and not welcome and I asked for some help in getting a food without salt ...I was looked upon as if I ... I am traveling a lot business , and I se people complained a lot in asiana lounge services. Jacob
Hawaiian Airlines
7.8
Good
2,604 reviews
Asiana Airlines
8.2
Very good
463 reviews

Crew

8.5

Food

8.0

Entertainment

7.7

Boarding

8.4

Overall

8.2

Comfort

8.1

Reviews

1 / 20
10.0
Excellent

Jacob,Jul 2025

ICN - JFK

I flew business calls Asiana, everything was great and good! I must say that the service at the Asian business class lounge prior to the flight is very poor, the staff are very cold and not welcome and I asked for some help in getting a food without salt ...I was looked upon as if I ... I am traveling a lot business , and I se people complained a lot in asiana lounge services. Jacob
United Airlines
7.4
Good
8,892 reviews
Asiana Airlines
8.2
Very good
463 reviews

Crew

8.5

Food

8.0

Entertainment

7.7

Boarding

8.4

Overall

8.2

Comfort

8.1

Reviews

1 / 20
10.0
Excellent

Jacob,Jul 2025

ICN - JFK

I flew business calls Asiana, everything was great and good! I must say that the service at the Asian business class lounge prior to the flight is very poor, the staff are very cold and not welcome and I asked for some help in getting a food without salt ...I was looked upon as if I ... I am traveling a lot business , and I se people complained a lot in asiana lounge services. Jacob

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 Hawaiian Airlines is currently your cheapest option to Seattle, with prices starting at $507. Additional round-trip tickets that might be worth considering are offered by Alaska Airlines and Asiana Airlines, with the lowest prices starting at $511 and $517, respectively. Hawaiian Airlines is priced at 37% 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: Delta (61%), Korean Air (61%), Thai Airways( 43%).

  • 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 $1,667, our data indicates the cheapest price to be $485. The most popular route (Incheon Intl - Seattle/Tacoma Intl), is priced around $475.

  • 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 June is currently the most expensive (average of $389). 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
Tukwila
Tacoma
Ocean Shores
Lakewood
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Lacey
Leavenworth
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Olympia
Puyallup
Kent
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Shelton

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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
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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 July 28, 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$474Average$752FlexibilityNo cancel feeOn-time67%
United AirlinesCheapest$516Average$646FlexibilityNo cancel feeOn-time69%
Korean AirCheapest$517Average$859FlexibilityNo cancel feeOn-time81%
Asiana AirlinesCheapest$541Average$785FlexibilityNo cancel feeOn-time76%
DeltaCheapest$638Average$959FlexibilityNo cancel feeOn-timeN/A

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