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Cheap flights from Incheon Intl Airport to Seattle from $313

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 10/10. 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

Cheap round-trip flights

Korean Air Logo
8:05 pm - 2:20 pmICN-SEA
10h 15mnonstop
Korean Air Logo
12:00 pm - 3:55 pmSEA-ICN
11h 55mnonstop
$458Korean Air
Find Deal
Mon, Oct 27 - Fri, Oct 31
Alaska Airlines Logo
9:25 pm - 8:40 amICN-SEA
27h 15m1 stop
Alaska Airlines Logo
5:20 am - 7:25 pmSEA-ICN
21h 05m2 stops
$460Alaska Airlines
Find Deal
Sat, Nov 1 - Tue, Nov 4
Korean Air Logo
4:40 pm - 10:40 amICN-SEA
10h 00mnonstop
Korean Air Logo
12:15 pm - 4:30 pmSEA-ICN
12h 15mnonstop
$467Korean Air
Find Deal
Mon, Oct 6 - Thu, Oct 16
Hawaiian Airlines Logo
9:25 pm - 7:54 amICN-SEA
26h 29m1 stop
Hawaiian Airlines Logo
4:45 pm - 7:25 pmSEA-ICN
34h 40m1 stop
$469Hawaiian Airlines
Find Deal
Fri, Sep 26 - Sat, Oct 25
United Airlines Logo
6:00 pm - 3:29 pmICN-SEA
14h 29m1 stop
United Airlines Logo
3:11 pm - 4:15 pmSEA-ICN
32h 04m1 stop
$470United Airlines
Find Deal
Mon, Dec 8 - Fri, Dec 19
Alaska Airlines Logo
9:25 pm - 7:11 amICN-SEA
26h 46m2 stops
Alaska Airlines Logo
6:30 pm - 7:25 pmSEA-ICN
31h 55m1 stop
$471Alaska Airlines
Find Deal
Sun, Nov 2 - Mon, Nov 3
Hawaiian Airlines Logo
8:35 pm - 2:35 pmICN-SEA
10h 00mnonstop
Hawaiian Airlines Logo
7:44 am - 7:00 pmSEA-ICN
19h 16m1 stop
$473Hawaiian Airlines
Find Deal
Thu, Oct 9 - Sun, Oct 19
Asiana Airlines Logo
9:00 pm - 2:55 pmICN-SEA
9h 55mnonstop
Asiana Airlines Logo
12:10 am - 5:20 amSEA-ICN
12h 10mnonstop
$526Asiana Airlines
Find Deal
Mon, Oct 27 - Sun, Feb 1
Asiana Airlines Logo
9:00 pm - 1:55 pmICN-SEA
9h 55mnonstop
Asiana Airlines Logo
12:10 am - 5:20 amSEA-ICN
12h 10mnonstop
$527Asiana Airlines
Find Deal
Sat, Dec 13 - Mon, Jan 5
Air Canada Logo
6:55 pm - 10:06 pmICN-SEA
20h 11m1 stop
Air Canada Logo
10:05 am - 5:10 pmSEA-ICN
14h 05m1 stop
$538Air Canada
Find Deal
Mon, Feb 2 - Fri, Feb 6

Delta flights from Incheon Intl Airport to Seattle

Our best Delta deals on Incheon Intl Airport to Seattle flight tickets
Delta
Sep 18
ICN7:20 pmIncheon Intl
10h 20m
SEA1:40 pmSeattle/Tacoma Intl
Oct 1
SEA7:20 amSeattle/Tacoma Intl
18h 00m
1 stop
ICN5:20 pmIncheon Intl
$632
Find similar
Delta
Sep 25
ICN9:00 pmIncheon Intl
27h 38m
1 stop
SEA8:38 amSeattle/Tacoma Intl
Oct 3
SEA5:45 pmSeattle/Tacoma Intl
31h 35m
1 stop
ICN5:20 pmIncheon Intl
$635
Find similar
Delta
Sep 25
ICN9:00 pmIncheon Intl
17h 15m
1 stop
SEA10:15 pmSeattle/Tacoma Intl
Oct 3
SEA5:45 pmSeattle/Tacoma Intl
31h 35m
1 stop
ICN5:20 pmIncheon Intl
$638
Find similar

United Airlines flights from Incheon Intl Airport to Seattle

Our best United Airlines deals on Incheon Intl Airport to Seattle flight tickets
United Airlines
Dec 8
ICN6:00 pmIncheon Intl
14h 29m
1 stop
SEA3:29 pmSeattle/Tacoma Intl
Dec 19
SEA3:11 pmSeattle/Tacoma Intl
32h 04m
1 stop
ICN4:15 pmIncheon Intl
$470
Find similar
United Airlines
Dec 16
ICN12:45 pmIncheon Intl
22h 42m
1 stop
SEA6:27 pmSeattle/Tacoma Intl
Jan 5
SEA12:35 pmSeattle/Tacoma Intl
24h 05m
1 stop
ICN5:40 amIncheon Intl
$472
Find similar
United Airlines
Sep 18
ICN4:50 pmIncheon Intl
14h 24m
1 stop
SEA3:14 pmSeattle/Tacoma Intl
Oct 1
SEA5:31 pmSeattle/Tacoma Intl
18h 49m
1 stop
ICN4:20 amIncheon Intl
$479
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 September 16, 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

Mon 10/27

8:05 pm-2:20 pm

Nonstop10h 15m

Seattle/Tacoma Intl

Fri 10/31

12:00 pm-3:55 pm

Nonstop11h 55m

$458

IncheonSeattle

ICN - SEA

ICNSEA

Incheon Intl

Sat 11/1

9:25 pm-8:40 am

1 stop27h 15m

Seattle/Tacoma Intl

Tue 11/4

5:20 am-7:25 pm

2 stops21h 05m

$460

IncheonSeattle

ICN - SEA

ICNSEA

Incheon Intl

Mon 10/6

4:40 pm-10:40 am

Nonstop10h 00m

Seattle/Tacoma Intl

Thu 10/16

12:15 pm-4:30 pm

Nonstop12h 15m

$467

IncheonSeattle

ICN - SEA

ICNSEA

Incheon Intl

Fri 9/26

9:25 pm-7:54 am

1 stop26h 29m

Seattle/Tacoma Intl

Sat 10/25

4:45 pm-7:25 pm

1 stop34h 40m

$469

IncheonSeattle

ICN - SEA

ICNSEA

Incheon Intl

Mon 12/8

6:00 pm-3:29 pm

1 stop14h 29m

Seattle/Tacoma Intl

Fri 12/19

3:11 pm-4:15 pm

1 stop32h 04m

$470

IncheonSeattle

ICN - SEA

ICNSEA

Incheon Intl

Sun 11/2

9:25 pm-7:11 am

2 stops26h 46m

Seattle/Tacoma Intl

Mon 11/3

6:30 pm-7:25 pm

1 stop31h 55m

$471

IncheonSeattle

ICN - SEA

ICNSEA

Incheon Intl

Thu 10/9

8:35 pm-2:35 pm

Nonstop10h 00m

Seattle/Tacoma Intl

Sun 10/19

7:44 am-7:00 pm

1 stop19h 16m

$473

IncheonSeattle

ICN - SEA

ICNSEA

Incheon Intl

Mon 10/27

9:00 pm-2:55 pm

Nonstop9h 55m

Seattle/Tacoma Intl

Sun 2/1

12:10 am-5:20 am

Nonstop12h 10m

$526

IncheonSeattle

ICN - SEA

ICNSEA

Incheon Intl

Sat 12/13

9:00 pm-1:55 pm

Nonstop9h 55m

Seattle/Tacoma Intl

Mon 1/5

12:10 am-5:20 am

Nonstop12h 10m

$527

IncheonSeattle

ICN - SEA

ICNSEA

Incheon Intl

Mon 2/2

6:55 pm-10:06 pm

1 stop20h 11m

Seattle/Tacoma Intl

Fri 2/6

10:05 am-5:10 pm

1 stop14h 05m

$538

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 cheapest month to fly to Seattle?

In general, May 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 $644. If you don’t want to visit Seattle in May, then you should wait until June to fly from Incheon Intl Airport, when ticket prices are also cheap, with an average price of $646.

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 $787. 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 $982.

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 $829 when looking at flights departing in the afternoon. Flights to Seattle are more costly in the morning, with an average ticket price of $922. Departure times in the morning 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 $743 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 $641 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?

No. A direct flight is the cheapest option for a flight between Incheon Intl Airport to Seattle.

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

As of September 2025, prices for Incheon Intl Airport to Seattle flights are approximately 57% 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

$458

Fastest flight time

9h 50m

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 $458. The best round-trip flight deal from Incheon Intl Airport to Seattle found on momondo in the last 72 hours is $557.
The fastest flight from Incheon Intl Airport to Seattle takes 9h 50m
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
Alaska AirlinesPriceFrom $488Free CancellationRating
8.0
10,000 reviews
Search Alaska Airlines flights
Korean AirPriceFrom $510Free CancellationRating
8.4
1,140 reviews
Search Korean Air flights
United AirlinesPriceFrom $516Free CancellationRating
7.4
8,924 reviews
Search United Airlines flights
Asiana AirlinesPriceFrom $533Free CancellationRating
8.2
480 reviews
Search Asiana Airlines flights
Hawaiian AirlinesPriceFrom $592Free CancellationRating
7.8
2,724 reviews
Search Hawaiian Airlines flights
DeltaPriceFrom $623Free CancellationRating
7.9
7,957 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 $510. Generally, Korean Air has 14 flights on this route every week with an average price of $796. 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 $533 round-trip, depending on your selected dates, with average Asiana Airlines deals seen on momondo around $720. Asiana Airlines operates 3 flights to Seattle from Incheon Intl Airport in an average week. Users have rated it 8.2/10 across 480 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
Renton
Olympia
Lynnwood
Kent
Marysville
Puyallup
Federal Way
Kirkland
Tukwila
Shoreline
Lakewood
Centralia
Fife
Cle Elum
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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