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Cheap flights from Incheon Intl Airport to Seattle from $361

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Incheon Intl Airport to Seattle departing on 10/16. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from Incheon Intl Airport to Seattle (ICN-SEA)

Cheap round-trip flights

Hawaiian Airlines Logo
9:25 pm - 6:15 amICN-SEA
24h 50m1 stop
Hawaiian Airlines Logo
2:50 pm - 6:35 pmSEA-ICN
11h 45mnonstop
$517Hawaiian Airlines
Find Deal
Wed, Sep 17 - Fri, Sep 19
Asiana Airlines Logo
6:20 pm - 12:30 pmICN-SEA
10h 10mnonstop
Asiana Airlines Logo
2:15 pm - 5:55 pmSEA-ICN
11h 40mnonstop
$522Asiana Airlines
Find Deal
Thu, Sep 25 - Sun, Oct 5
Asiana Airlines Logo
6:20 pm - 12:30 pmICN-SEA
10h 10mnonstop
Asiana Airlines Logo
2:15 pm - 5:55 pmSEA-ICN
11h 40mnonstop
$523Asiana Airlines
Find Deal
Wed, Oct 1 - Thu, Oct 9
Air Canada Logo
6:55 pm - 2:26 pmICN-SEA
12h 31m1 stop
Air Canada Logo
10:05 am - 5:10 pmSEA-ICN
14h 05m1 stop
$526Air Canada
Find Deal
Mon, Nov 24 - Fri, Dec 5
Air Canada Logo
5:45 pm - 6:36 pmICN-SEA
16h 51m1 stop
Air Canada Logo
7:15 pm - 4:05 pmSEA-ICN
28h 50m1 stop
$527Air Canada
Find Deal
Fri, Sep 12 - Thu, Sep 18
Alaska Airlines Logo
8:35 pm - 1:45 pmICN-SEA
10h 10mnonstop
Alaska Airlines Logo
1:40 pm - 6:35 pmSEA-ICN
11h 55mnonstop
$539Alaska Airlines
Find Deal
Thu, Nov 27 - Sun, Nov 30
Alaska Airlines Logo
8:35 pm - 2:45 pmICN-SEA
10h 10mnonstop
Alaska Airlines Logo
2:50 pm - 6:35 pmSEA-ICN
11h 45mnonstop
$540Alaska Airlines
Find Deal
Mon, Sep 15 - Thu, Sep 25
United Airlines Logo
6:00 pm - 8:23 amICN-SEA
31h 23m1 stop
United Airlines Logo
12:35 pm - 4:15 pmSEA-ICN
34h 40m1 stop
$557United Airlines
Find Deal
Thu, Dec 18 - Sat, Jan 3
United Airlines Logo
4:50 pm - 10:15 pmICN-SEA
21h 25m2 stops
United Airlines Logo
5:26 pm - 3:00 pmSEA-ICN
29h 34m2 stops
$560United Airlines
Find Deal
Mon, Sep 15 - Thu, Sep 25
American Airlines Logo
5:25 pm - 10:54 amICN-SEA
33h 29m1 stop
American Airlines Logo
5:43 pm - 3:30 pmSEA-ICN
29h 47m1 stop
$573American Airlines
Find Deal
Sat, Sep 13 - Fri, Sep 26

Hawaiian Airlines flights from Incheon Intl Airport to Seattle

Our best Hawaiian Airlines deals on Incheon Intl Airport to Seattle flight tickets
Hawaiian Airlines
Sep 17
ICN9:25 pmIncheon Intl
24h 50m
1 stop
SEA6:15 amSeattle/Tacoma Intl
Sep 19
SEA2:50 pmSeattle/Tacoma Intl
11h 45m
ICN6:35 pmIncheon Intl
$517
Find similar
Hawaiian Airlines
Sep 13
ICN8:35 pmIncheon Intl
10h 10m
SEA2:45 pmSeattle/Tacoma Intl
Sep 20
SEA2:50 pmSeattle/Tacoma Intl
11h 45m
ICN6:35 pmIncheon Intl
$530
Find similar
Hawaiian Airlines
Sep 15
ICN8:35 pmIncheon Intl
10h 10m
SEA2:45 pmSeattle/Tacoma Intl
Oct 5
SEA2:55 pmSeattle/Tacoma Intl
11h 40m
ICN6:35 pmIncheon Intl
$537
Find similar

Asiana Airlines flights from Incheon Intl Airport to Seattle

Our best Asiana Airlines deals on Incheon Intl Airport to Seattle flight tickets
Asiana Airlines
Sep 25
ICN6:20 pmIncheon Intl
10h 10m
SEA12:30 pmSeattle/Tacoma Intl
Oct 5
SEA2:15 pmSeattle/Tacoma Intl
11h 40m
ICN5:55 pmIncheon Intl
$522
Find similar
Asiana Airlines
Oct 1
ICN6:20 pmIncheon Intl
10h 10m
SEA12:30 pmSeattle/Tacoma Intl
Oct 9
SEA2:15 pmSeattle/Tacoma Intl
11h 40m
ICN5:55 pmIncheon Intl
$523
Find similar
Asiana Airlines
Jan 29
ICN9:00 pmIncheon Intl
9h 55m
SEA1:55 pmSeattle/Tacoma Intl
Jan 30
SEA12:10 amSeattle/Tacoma Intl
12h 10m
ICN5:20 amIncheon Intl
$538
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Incheon Intl Airport 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, momondo users made 832,500 searches. Data last updated August 21, 2025.
Use the filters below to find and compare flights from Incheon Intl Airport to Seattle that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

IncheonSeattle

ICN - SEA

ICNSEA

Incheon Intl

Wed 9/17

9:25 pm-6:15 am

1 stop24h 50m

Seattle/Tacoma Intl

Fri 9/19

2:50 pm-6:35 pm

Nonstop11h 45m

$517

IncheonSeattle

ICN - SEA

ICNSEA

Incheon Intl

Thu 9/25

6:20 pm-12:30 pm

Nonstop10h 10m

Seattle/Tacoma Intl

Sun 10/5

2:15 pm-5:55 pm

Nonstop11h 40m

$522

IncheonSeattle

ICN - SEA

ICNSEA

Incheon Intl

Wed 10/1

6:20 pm-12:30 pm

Nonstop10h 10m

Seattle/Tacoma Intl

Thu 10/9

2:15 pm-5:55 pm

Nonstop11h 40m

$523

IncheonSeattle

ICN - SEA

ICNSEA

Incheon Intl

Mon 11/24

6:55 pm-2:26 pm

1 stop12h 31m

Seattle/Tacoma Intl

Fri 12/5

10:05 am-5:10 pm

1 stop14h 05m

$526

IncheonSeattle

ICN - SEA

ICNSEA

Incheon Intl

Fri 9/12

5:45 pm-6:36 pm

1 stop16h 51m

Seattle/Tacoma Intl

Thu 9/18

7:15 pm-4:05 pm

1 stop28h 50m

$527

IncheonSeattle

ICN - SEA

ICNSEA

Incheon Intl

Thu 11/27

8:35 pm-1:45 pm

Nonstop10h 10m

Seattle/Tacoma Intl

Sun 11/30

1:40 pm-6:35 pm

Nonstop11h 55m

$539

IncheonSeattle

ICN - SEA

ICNSEA

Incheon Intl

Mon 9/15

8:35 pm-2:45 pm

Nonstop10h 10m

Seattle/Tacoma Intl

Thu 9/25

2:50 pm-6:35 pm

Nonstop11h 45m

$540

IncheonSeattle

ICN - SEA

ICNSEA

Incheon Intl

Thu 12/18

6:00 pm-8:23 am

1 stop31h 23m

Seattle/Tacoma Intl

Sat 1/3

12:35 pm-4:15 pm

1 stop34h 40m

$557

IncheonSeattle

ICN - SEA

ICNSEA

Incheon Intl

Mon 9/15

4:50 pm-10:15 pm

2 stops21h 25m

Seattle/Tacoma Intl

Thu 9/25

5:26 pm-3:00 pm

2 stops29h 34m

$560

IncheonSeattle

ICN - SEA

ICNSEA

Incheon Intl

Sat 9/13

5:25 pm-10:54 am

1 stop33h 29m

Seattle/Tacoma Intl

Fri 9/26

5:43 pm-3:30 pm

1 stop29h 47m

$573

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Seattle from

How to get the cheapest flight ticket from Incheon Intl Airport to Seattle

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the typical price of a round-trip flight between Incheon Intl Airport and Seattle?

What is the cheapest month to fly to Seattle?

In general, June is the cheapest month to fly from Incheon Intl Airport to Seattle. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $646. If you don’t want to visit Seattle in June, then you should wait until May to fly from Incheon Intl Airport, when ticket prices are also cheap, with an average price of $648.

What is the cheapest day to depart on your flight to Seattle?

On average, the least expensive day to fly to Seattle from Incheon Intl Airport is on a Wednesday. momondo users have found tickets for Wednesday departures for as low as $800. However, this price may fluctuate depending on the airline, the season, and holidays. On the other hand, Saturday is the most expensive day to depart from Incheon Intl Airport because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $1,027.

What is the cheapest time of day to depart on your flight to Seattle?

Flying to Seattle from Incheon Intl Airport in the afternoon is the least expensive time of day to depart. momondo users have found prices as low as $842 when looking at flights departing in the afternoon. Flights to Seattle are more costly in the evening, with an average ticket price of $978. Departure times in the evening fall within the peak daily travel times, which is why tickets can be more expensive.

What is the cheapest Incheon Intl to Seattle/Tacoma Intl flight route?

Fly from Incheon Intl to Seattle/Tacoma Intl for the best Incheon Intl - Seattle/Tacoma Intl flight prices

How far in advance should I book a flight to Seattle?

You are more likely to see cheaper flights to Seattle from Incheon Intl Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to Seattle for around $774 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Seattle from Incheon Intl Airport for as low as $674 on momondo.

What cabin class options are available on Incheon Intl to Seattle/Tacoma Intl flights?

There are 4 cabin classes available to choose from on Incheon Intl to Seattle/Tacoma Intl flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Incheon Intl Airport to Seattle flights?

You could potentially save up to 42% on your flight if you consider stops on a Incheon Intl Airport to Seattle flight.

How have Incheon Intl Airport to Seattle flight prices changed over time?

As of August 2025, prices for Incheon Intl Airport to Seattle flights are approximately 42% cheaper when compared to flights at the same time last year.

When to book flights from Incheon Intl Airport to Seattle

Are you open to changing your travel dates? Check out the ideal times to fly from Incheon Intl Airport to Seattle according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Incheon Intl Airport to Seattle (ICN to SEA) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Incheon Intl Airport to Seattle

Best Price Found

$535

Fastest flight time

9h 55m

Direct flights

Every day

Airports in Seattle

1 airport
The best one-way flight to Seattle from Incheon Intl Airport in the past 72 hours is $535. The best round-trip flight deal from Incheon Intl Airport to Seattle found on momondo in the last 72 hours is $600.
The fastest flight from Incheon Intl Airport to Seattle takes 9h 55m
Direct flights go from Incheon Intl Airport to Seattle every day.
There is 1 airport near Seattle: Seattle/Tacoma Intl (SEA)
Search flight deals

  • How far is Incheon Intl to Seattle/Tacoma Intl by plane?

    The distance between Incheon Intl and Seattle/Tacoma Intl is about 5192.0 mi. By plane, this route typically takes 9h 55m.

  • When did momondo last update prices for flights from Incheon Intl Airport to Seattle/Tacoma Intl Airport?

    Prices for flights from Incheon Intl Airport to Seattle/Tacoma Intl Airport refresh daily.

  • How many operators does momondo search for flights from Incheon Intl Airport to Seattle/Tacoma Intl Airport?

  • How old do you have to be to fly from Incheon Intl Airport to Seattle/Tacoma Intl Airport?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Incheon Intl Airport to Seattle/Tacoma Intl Airport.

  • What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?

    The travel and health documents required for your trip to Seattle/Tacoma Intl Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Seattle/Tacoma Intl Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • What is the most popular plane model from Incheon Intl Airport to Seattle?

  • What is the most popular airline from Incheon Intl Airport to Seattle?

Best airlines flying from Incheon Intl Airport to Seattle

Compare and see reviews for airlines that fly from Incheon Intl Airport to Seattle with momondo
Airline
Rating
Free Cancellation
Price
Air CanadaPriceFrom $472Free CancellationRating
7.1
10,000 reviews
Search Air Canada flights
Korean AirPriceFrom $515Free CancellationRating
8.4
1,131 reviews
Search Korean Air flights
United AirlinesPriceFrom $516Free CancellationRating
7.4
8,930 reviews
Search United Airlines flights
Asiana AirlinesPriceFrom $535Free CancellationRating
8.2
475 reviews
Search Asiana Airlines flights
DeltaPriceFrom $638Free CancellationRating
7.9
7,981 reviews
Search Delta flights

  • Korean Air Flights From Incheon Intl Airport to Seattle

    The lowest priced Korean Air flight from Incheon Intl Airport to Seattle from the last 72 hours was $515. Generally, Korean Air has 14 flights on this route every week with an average price of $811. Korean Air is rated 8.4/10 by our users.

  • Asiana Airlines Flights From Incheon Intl Airport to Seattle

    Asiana Airlines is also a popular choice for this route. Asiana Airlines flight deals for Incheon Intl Airport to Seattle start from as low as $535 round-trip, depending on your selected dates, with average Asiana Airlines deals seen on momondo around $761. Asiana Airlines operates 5 flights to Seattle from Incheon Intl Airport in an average week. Users have rated it 8.2/10 across 475 reviews.

Traveling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
Leavenworth
Tacoma
SeaTac
Ocean Shores
Olympia
Renton
Kent
Lynnwood
Federal Way
Marysville
Puyallup
Tukwila
Kirkland
Lakewood
Centralia
Cle Elum
Shoreline
Fife
Redmond
Westport

Why use momondo?

Why should I use momondo to find a flight deal from Seoul to Seattle?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Seoul to Seattle. momondo saves you time and could save you money on your trip.

Can I find flights from Seoul to Seattle with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for Seoul to Seattle flights to just show those with flexible booking policies.

How can momondo help me find flights from Seoul to Seattle?

momondo provides multiple filters to help you find the best flight to Seattle from Seoul. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

I’m not ready to book a flight from Seoul to Seattle right now. Can momondo alert me if prices change?

Yes. momondo can track prices for Seoul to Seattle flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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