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Cheap flights from Incheon Intl Airport to Seattle from $373

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 3/3. 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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0 bags

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Find the cheapest flights from Incheon Intl Airport to Seattle

Cheap round-trip flights

Enter your travel dates to find the best prices.
Air Canada Logo
5:45 pm - 7:18 pm
ICN
-
SEA
17h 33m
1 stop
Air Canada Logo
9:55 am - 4:05 pm
SEA
-
ICN
14h 10m
1 stop
$398Air Canada
lun., abr. 20 - mié., may. 20
Multiple Airlines Logo
5:45 pm - 9:15 am
ICN
-
SEA
31h 30m
1 stop
Multiple Airlines Logo
7:20 pm - 11:35 am
SEA
-
ICN
48h 15m
2 stops
$404Multiple Airlines
mar., jun. 2 - dom., jun. 7
Multiple Airlines Logo
5:45 pm - 9:33 am
ICN
-
SEA
31h 48m
1 stop
Multiple Airlines Logo
5:40 am - 11:35 am
SEA
-
ICN
37h 55m
2 stops
$412Multiple Airlines
lun., abr. 20 - mié., may. 20
Air Canada Logo
5:45 pm - 10:50 pm
ICN
-
SEA
21h 05m
1 stop
Air Canada Logo
5:40 am - 4:05 pm
SEA
-
ICN
18h 25m
1 stop
$427Air Canada
mié., abr. 22 - vie., may. 8
Multiple Airlines Logo
5:45 pm - 2:20 pm
ICN
-
SEA
12h 35m
1 stop
Multiple Airlines Logo
9:55 am - 10:15 pm
SEA
-
ICN
20h 20m
2 stops
$434Multiple Airlines
jue., may. 7 - jue., jun. 25
Multiple Airlines Logo
5:45 pm - 10:50 pm
ICN
-
SEA
21h 05m
1 stop
Multiple Airlines Logo
7:20 pm - 12:40 pm
SEA
-
ICN
25h 20m
2 stops
$439Multiple Airlines
vie., abr. 24 - lun., may. 4
Multiple Airlines Logo
5:45 pm - 6:30 pm
ICN
-
SEA
16h 45m
1 stop
Multiple Airlines Logo
9:55 am - 10:15 pm
SEA
-
ICN
20h 20m
2 stops
$440Multiple Airlines
vie., may. 29 - mar., jun. 16
Multiple Airlines Logo
2:10 pm - 3:01 pm
ICN
-
SEA
16h 51m
2 stops
Multiple Airlines Logo
5:40 am - 4:05 pm
SEA
-
ICN
18h 25m
1 stop
$442Multiple Airlines
mar., mar. 10 - mar., sep. 8
Multiple Airlines Logo
5:45 pm - 3:03 pm
ICN
-
SEA
13h 18m
1 stop
Multiple Airlines Logo
7:20 pm - 2:05 pm
SEA
-
ICN
26h 45m
2 stops
$444Multiple Airlines
jue., abr. 23 - jue., may. 7
Multiple Airlines Logo
2:10 pm - 3:01 pm
ICN
-
SEA
16h 51m
2 stops
Multiple Airlines Logo
3:00 pm - 12:40 pm
SEA
-
ICN
29h 40m
2 stops
$460Multiple Airlines
mar., mar. 10 - mar., sep. 8

Korean Air flights from Incheon Intl Airport to Seattle

Our best Korean Air deals on Incheon Intl Airport to Seattle flight tickets
Korean Air
Apr 24
ICN4:40 pmIncheon Intl
10h 00m
SEA10:40 amSeattle/Tacoma Intl
May 4
SEA1:00 pmSeattle/Tacoma Intl
11h 50m
ICN4:50 pmIncheon Intl
$648
Korean Air
May 17
ICN7:00 pmIncheon Intl
10h 11m
SEA1:11 pmSeattle/Tacoma Intl
Aug 2
SEA1:20 pmSeattle/Tacoma Intl
11h 20m
ICN4:40 pmIncheon Intl
$651
Korean Air
May 17
ICN7:00 pmIncheon Intl
10h 11m
SEA1:11 pmSeattle/Tacoma Intl
Aug 2
SEA1:20 pmSeattle/Tacoma Intl
11h 20m
ICN4:40 pmIncheon Intl
$652

Delta flights from Incheon Intl Airport to Seattle

Our best Delta deals on Incheon Intl Airport to Seattle flight tickets
Delta
Feb 10
ICN8:05 pmIncheon Intl
10h 15m
SEA1:20 pmSeattle/Tacoma Intl
Feb 22
SEA11:25 amSeattle/Tacoma Intl
12h 05m
ICN4:30 pmIncheon Intl
$727
Delta
Feb 6
ICN8:05 pmIncheon Intl
10h 15m
SEA1:20 pmSeattle/Tacoma Intl
Feb 18
SEA8:30 pmSeattle/Tacoma Intl
28h 10m
1 stop
ICN5:40 pmIncheon Intl
$743
Delta
Feb 10
ICN8:05 pmIncheon Intl
10h 15m
SEA1:20 pmSeattle/Tacoma Intl
Feb 17
SEA8:30 pmSeattle/Tacoma Intl
28h 10m
1 stop
ICN5:40 pmIncheon Intl
$745

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 febrero 3, 2026.
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

lun. 4/20

5:45 pm-7:18 pm

1 stop17h 33m

Seattle/Tacoma Intl

mié. 5/20

9:55 am-4:05 pm

1 stop14h 10m

$398

IncheonSeattle

ICN - SEA

ICNSEA

Incheon Intl

mar. 6/2

5:45 pm-9:15 am

1 stop31h 30m

Seattle/Tacoma Intl

dom. 6/7

7:20 pm-11:35 am

2 stops48h 15m

$404

IncheonSeattle

ICN - SEA

ICNSEA

Incheon Intl

lun. 4/20

5:45 pm-9:33 am

1 stop31h 48m

Seattle/Tacoma Intl

mié. 5/20

5:40 am-11:35 am

2 stops37h 55m

$412

IncheonSeattle

ICN - SEA

ICNSEA

Incheon Intl

mié. 4/22

5:45 pm-10:50 pm

1 stop21h 05m

Seattle/Tacoma Intl

vie. 5/8

5:40 am-4:05 pm

1 stop18h 25m

$427

IncheonSeattle

ICN - SEA

ICNSEA

Incheon Intl

jue. 5/7

5:45 pm-2:20 pm

1 stop12h 35m

Seattle/Tacoma Intl

jue. 6/25

9:55 am-10:15 pm

2 stops20h 20m

$434

IncheonSeattle

ICN - SEA

ICNSEA

Incheon Intl

vie. 4/24

5:45 pm-10:50 pm

1 stop21h 05m

Seattle/Tacoma Intl

lun. 5/4

7:20 pm-12:40 pm

2 stops25h 20m

$439

IncheonSeattle

ICN - SEA

ICNSEA

Incheon Intl

vie. 5/29

5:45 pm-6:30 pm

1 stop16h 45m

Seattle/Tacoma Intl

mar. 6/16

9:55 am-10:15 pm

2 stops20h 20m

$440

IncheonSeattle

ICN - SEA

ICNSEA

Incheon Intl

mar. 3/10

2:10 pm-3:01 pm

2 stops16h 51m

Seattle/Tacoma Intl

mar. 9/8

5:40 am-4:05 pm

1 stop18h 25m

$442

IncheonSeattle

ICN - SEA

ICNSEA

Incheon Intl

jue. 4/23

5:45 pm-3:03 pm

1 stop13h 18m

Seattle/Tacoma Intl

jue. 5/7

7:20 pm-2:05 pm

2 stops26h 45m

$444

IncheonSeattle

ICN - SEA

ICNSEA

Incheon Intl

mar. 3/10

2:10 pm-3:01 pm

2 stops16h 51m

Seattle/Tacoma Intl

mar. 9/8

3:00 pm-12:40 pm

2 stops29h 40m

$460

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, November 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 $531. If you don’t want to visit Seattle in November, then you should wait until December to fly from Incheon Intl Airport, when ticket prices are also cheap, with an average price of $597.

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 Thursday. momondo users have found tickets for Thursday departures for as low as $719. 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 $898.

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

Flying to Seattle from Incheon Intl Airport in the evening is the least expensive time of day to depart. momondo users have found prices as low as $748 when looking at flights departing in the evening. Flights to Seattle are more costly in the afternoon, with an average ticket price of $752. Departure times in the afternoon 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 $700 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 $543 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 28% 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 February 2026, prices for Incheon Intl Airport to Seattle flights are approximately 34% 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

$643

Fastest flight time

10h 00m

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 $643. The best round-trip flight deal from Incheon Intl Airport to Seattle found on momondo in the last 72 hours is $711.
The fastest flight from Incheon Intl Airport to Seattle takes 10h 00m
Direct flights go from Incheon Intl Airport to Seattle every day.
There is 1 airport in Seattle. From Incheon Intl Airport there are direct flights to 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 10h 00m.

  • 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
Hawaiian AirlinesPriceFrom $351Free CancellationRating
7.8
2,831 reviews
Search Hawaiian Airlines flights
Asiana AirlinesPriceFrom $466Free CancellationRating
8.1
502 reviews
Search Asiana Airlines flights
Korean AirPriceFrom $469Free CancellationRating
8.4
1,188 reviews
Search Korean Air flights
Alaska AirlinesPriceFrom $476Free CancellationRating
8.0
11,833 reviews
Search Alaska Airlines flights
United AirlinesPriceFrom $516Free CancellationRating
7.4
9,235 reviews
Search United Airlines flights
DeltaPriceFrom $606Free CancellationRating
7.9
8,138 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 $469. Generally, Korean Air has 14 flights on this route every week with an average price of $722. 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 $466 round-trip, depending on your selected dates, with average Asiana Airlines deals seen on momondo around $653. Asiana Airlines operates 5 flights to Seattle from Incheon Intl Airport in an average week. Users have rated it 8.1/10 across 502 reviews.

Traveling to a place near Seattle?

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

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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