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Cheap flights from Seattle to Seoul from $339

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Seattle to Seoul departing on 3/26. 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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Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
9:28 am - 5:10 am
SEA
-
ICN
26h 42m1 stop
Multiple Airlines Logo
9:20 pm - 10:25 am
ICN
-
SEA
29h 05m2 stops
$728Multiple Airlines
Mon, Mar 2 - Thu, Mar 12
Multiple Airlines Logo
11:05 am - 8:35 pm
SEA
-
ICN
41h 30m2 stops
Multiple Airlines Logo
9:10 pm - 2:09 pm
ICN
-
SEA
32h 59m2 stops
$732Multiple Airlines
Thu, Mar 19 - Sun, Apr 26
Multiple Airlines Logo
9:28 am - 4:20 pm
SEA
-
ICN
37h 52m1 stop
Multiple Airlines Logo
9:20 pm - 2:19 pm
ICN
-
SEA
32h 59m2 stops
$740Multiple Airlines
Thu, Mar 5 - Tue, Mar 17
Air Canada Logo
5:50 am - 4:00 pm
SEA
-
ICN
17h 10m1 stop
Air Canada Logo
6:55 pm - 7:16 pm
ICN
-
SEA
17h 21m1 stop
$741Air Canada
Tue, Jan 13 - Thu, Jan 22
Multiple Airlines Logo
11:05 pm - 9:35 pm
SEA
-
ICN
29h 30m1 stop
Multiple Airlines Logo
9:20 pm - 10:22 am
ICN
-
SEA
30h 02m2 stops
$744Multiple Airlines
Wed, Jan 14 - Sat, Jan 24
Multiple Airlines Logo
9:28 am - 4:20 pm
SEA
-
ICN
37h 52m1 stop
Multiple Airlines Logo
9:20 pm - 7:02 am
ICN
-
SEA
25h 42m1 stop
$746Multiple Airlines
Thu, Mar 5 - Tue, Mar 17
Multiple Airlines Logo
6:24 pm - 4:20 pm
SEA
-
ICN
29h 56m1 stop
Multiple Airlines Logo
9:20 pm - 10:25 am
ICN
-
SEA
29h 05m2 stops
$750Multiple Airlines
Fri, Mar 13 - Sun, Mar 22
Hainan Airlines Logo
10:05 am - 8:35 pm
SEA
-
ICN
41h 30m2 stops
Hainan Airlines Logo
9:40 pm - 9:05 am
ICN
-
SEA
27h 25m2 stops
$751Hainan Airlines
Thu, Mar 5 - Wed, Mar 11
Multiple Airlines Logo
5:50 am - 10:25 pm
SEA
-
ICN
23h 35m2 stops
Multiple Airlines Logo
6:55 pm - 7:16 pm
ICN
-
SEA
17h 21m1 stop
$753Multiple Airlines
Tue, Jan 13 - Thu, Jan 22
Multiple Airlines Logo
10:09 am - 5:40 am
SEA
-
ICN
26h 31m1 stop
Multiple Airlines Logo
9:20 pm - 10:25 am
ICN
-
SEA
29h 05m2 stops
$755Multiple Airlines
Tue, Mar 3 - Thu, Mar 12

Hainan Airlines flights from Seattle to Incheon Intl Airport

Our best Hainan Airlines deals on Seattle to Incheon Intl Airport flight tickets
Hainan Airlines
Mar 5
SEA10:05 amSeattle/Tacoma Intl
41h 30m
2 stops
ICN8:35 pmIncheon Intl
Mar 11
ICN9:40 pmIncheon Intl
27h 25m
2 stops
SEA9:05 amSeattle/Tacoma Intl
$751
Find similar
Hainan Airlines
Mar 12
SEA11:05 amSeattle/Tacoma Intl
41h 30m
2 stops
ICN8:35 pmIncheon Intl
Mar 25
ICN9:40 pmIncheon Intl
27h 25m
2 stops
SEA9:05 amSeattle/Tacoma Intl
$785
Find similar
Hainan Airlines
Jan 3
SEA10:00 amSeattle/Tacoma Intl
41h 20m
2 stops
ICN8:20 pmIncheon Intl
Jan 21
ICN9:40 pmIncheon Intl
27h 25m
2 stops
SEA8:05 amSeattle/Tacoma Intl
$1,713
Find similar

Air Canada flights from Seattle to Incheon Intl Airport

Our best Air Canada deals on Seattle to Incheon Intl Airport flight tickets
Air Canada
Jan 13
SEA5:50 amSeattle/Tacoma Intl
17h 10m
1 stop
ICN4:00 pmIncheon Intl
Jan 22
ICN6:55 pmIncheon Intl
17h 21m
1 stop
SEA7:16 pmSeattle/Tacoma Intl
$741
Find similar
Air Canada
Jan 26
SEA5:50 amSeattle/Tacoma Intl
18h 20m
1 stop
ICN5:10 pmIncheon Intl
Feb 2
ICN6:55 pmIncheon Intl
12h 36m
1 stop
SEA2:31 pmSeattle/Tacoma Intl
$761
Find similar
Air Canada
Feb 18
SEA9:55 amSeattle/Tacoma Intl
14h 15m
1 stop
ICN5:10 pmIncheon Intl
Mar 12
ICN5:55 pmIncheon Intl
17h 21m
1 stop
SEA7:16 pmSeattle/Tacoma Intl
$790
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Seattle to Incheon Intl Airport 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 December 28, 2025.
Use the filters below to find and compare flights from Seattle to Incheon Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Mon 3/2

9:28 am-5:10 am

1 stop26h 42m

Incheon Intl

Thu 3/12

9:20 pm-10:25 am

2 stops29h 05m

$728

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Thu 3/19

11:05 am-8:35 pm

2 stops41h 30m

Incheon Intl

Sun 4/26

9:10 pm-2:09 pm

2 stops32h 59m

$732

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Thu 3/5

9:28 am-4:20 pm

1 stop37h 52m

Incheon Intl

Tue 3/17

9:20 pm-2:19 pm

2 stops32h 59m

$740

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Tue 1/13

5:50 am-4:00 pm

1 stop17h 10m

Incheon Intl

Thu 1/22

6:55 pm-7:16 pm

1 stop17h 21m

$741

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Wed 1/14

11:05 pm-9:35 pm

1 stop29h 30m

Incheon Intl

Sat 1/24

9:20 pm-10:22 am

2 stops30h 02m

$744

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Thu 3/5

9:28 am-4:20 pm

1 stop37h 52m

Incheon Intl

Tue 3/17

9:20 pm-7:02 am

1 stop25h 42m

$746

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Fri 3/13

6:24 pm-4:20 pm

1 stop29h 56m

Incheon Intl

Sun 3/22

9:20 pm-10:25 am

2 stops29h 05m

$750

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Thu 3/5

10:05 am-8:35 pm

2 stops41h 30m

Incheon Intl

Wed 3/11

9:40 pm-9:05 am

2 stops27h 25m

$751

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Tue 1/13

5:50 am-10:25 pm

2 stops23h 35m

Incheon Intl

Thu 1/22

6:55 pm-7:16 pm

1 stop17h 21m

$753

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Tue 3/3

10:09 am-5:40 am

1 stop26h 31m

Incheon Intl

Thu 3/12

9:20 pm-10:25 am

2 stops29h 05m

$755

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 Seoul from

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

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 Seattle and Incheon Intl Airport?

What is the cheapest month to fly to Incheon Intl Airport?

The cheapest month to fly to Incheon Intl Airport from Seattle is in April. Flight prices, which tend to average around $338, are often lower during this time because this is during the off-season. If you are unable to visit Incheon Intl Airport during the month of April, then departing from Seattle during the month August is also very affordable. Most momondo users find prices during this month for around $338.

What is the cheapest day to depart on your flight to Incheon Intl Airport?

The cheapest day to depart from Seattle to Incheon Intl Airport is on a Wednesday when prices can be found for as low as $718. If your travel schedule is flexible, try to avoid departing on a Friday because tickets tend to average around $960. These prices are subject to change though, so be sure to set up a Price Alert for flights to Incheon Intl Airport.

What is the cheapest time of day to depart on your flight to Incheon Intl Airport?

In the evening is the cheapest time of day to fly from Seattle to Incheon Intl Airport when you can find flight prices for as low as $711. Flying to Incheon Intl Airport in the evening is an ideal time because this is during off-peak travel hours. If you have a flexible travel schedule, then try to avoid flying in the afternoon when prices are $1,401 on average. Flights to Incheon Intl Airport from Seattle in the afternoon are generally more expensive because this time of day is more convenient for travelers’ schedules.

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

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

How far in advance should I book a flight to Incheon Intl Airport?

You are more likely to see cheaper flights to Incheon Intl Airport from Seattle when booking weeks ahead of your departure date. In general, you can expect to find flights to Incheon Intl Airport for around $946 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Incheon Intl Airport from Seattle for as low as $593 on momondo.

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

There are 3 cabin classes available to choose from on Seattle/Tacoma Intl to Incheon 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 Seattle to Incheon Intl Airport flights?

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

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

As of December 2025, prices for Seattle to Incheon Intl Airport flights are approximately 38% cheaper when compared to flights at the same time last year.

When to book flights from Seattle to Incheon Intl Airport

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

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

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

Best Price Found

$361

Fastest flight time

11h 20m

Direct flights

Every day
The best one-way flight to Incheon Intl Airport from Seattle in the past 72 hours is $361. The best round-trip flight deal from Seattle to Incheon Intl Airport found on momondo in the last 72 hours is $337.
The fastest flight from Seattle to Incheon Intl Airport takes 11h 20m
Direct flights go from Seattle to Incheon Intl Airport every day.
Search flight deals

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

    Seattle/Tacoma Intl and Incheon Intl are 5192.0 mi apart from one another. By plane, this route typically takes 11h 20m.

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

    Prices for flights from Seattle/Tacoma Intl Airport to Incheon Intl Airport are refreshed on a daily basis.

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

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

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Seattle/Tacoma Intl Airport to Incheon Intl Airport.

  • What documentation or ID do you need to fly to Incheon Intl Airport?

    The travel and health documents you'll need for your trip to Incheon Intl Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Incheon Intl Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

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

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

Best airlines flying from Seattle to Incheon Intl Airport

Compare and see reviews for airlines that fly from Seattle to Incheon Intl Airport with momondo
Airline
Rating
Free Cancellation
Price
DeltaPriceFrom $179Free CancellationRating
7.9
8,022 reviews
Search Delta flights
United AirlinesPriceFrom $282Free CancellationRating
7.4
9,116 reviews
Search United Airlines flights
Hawaiian AirlinesPriceFrom $282Free CancellationRating
7.8
2,820 reviews
Search Hawaiian Airlines flights
Alaska AirlinesPriceFrom $335Free CancellationRating
8.0
11,549 reviews
Search Alaska Airlines flights
Air CanadaPriceFrom $611Free CancellationRating
7.1
10,562 reviews
Search Air Canada flights
Asiana AirlinesPriceFrom $797Free CancellationRating
8.2
501 reviews
Search Asiana Airlines flights
Korean AirPriceFrom $847Free CancellationRating
8.4
1,184 reviews
Search Korean Air flights
China AirlinesPriceFrom $886Free CancellationRating
8.3
793 reviews
Search China Airlines flights
EVA AirPriceFrom $978Free CancellationRating
8.5
1,303 reviews
Search EVA Air flights
Turkish AirlinesPriceFrom $995Free CancellationRating
7.3
4,125 reviews
Search Turkish Airlines flights

  • Korean Air Flights From Seattle to Incheon Intl Airport

    Korean Air flight deals from Seattle to Incheon Intl Airport start from $847 round-trip. Over the 13 Korean Air flights for this route in a normal week, average airfare is usually $1,170 round-trip - but some users have found much cheaper deals with momondo.

  • Asiana Airlines Flights From Seattle to Incheon Intl Airport

    Another popular option for Seattle to Incheon Intl Airport flights is Asiana Airlines (8.2/10, 501 ratings). Asiana Airlines flies from Seattle to Incheon Intl Airport around 4 times per week, with deals starting from $797 round-trip and rising to an average price of around $1,067.

Traveling to a place near Seoul?

Book flights to Seoul if you plan to visit one of these locations
Suwon
Daejeon
Seongnam
Anyang

Why use momondo?

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

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Seattle to Seoul for you.

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

Yes. All flights to Seoul from Seattle on momondo can be compared and filtered by various policies on offer, including flexible booking.

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

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Seoul from Seattle.

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

Of course. momondo tracks the price of Seattle to Seoul flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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