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Cheap flights from Seattle to Seoul 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 Seattle to Seoul departing on 11/6. 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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Cheap round-trip flights

Asiana Airlines Logo
12:10 am - 4:20 amSEA-ICN
12h 10mnonstop
Asiana Airlines Logo
9:00 pm - 1:55 pmICN-SEA
9h 55mnonstop
$766Asiana Airlines
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Sun, Oct 26 - Mon, Nov 3
Multiple Airlines Logo
4:30 pm - 4:50 amSEA-ICN
20h 20m1 stop
Multiple Airlines Logo
9:20 pm - 10:25 amICN-SEA
29h 05m2 stops
$767Multiple Airlines
Find Deal
Mon, Oct 20 - Sun, Oct 26
Multiple Airlines Logo
11:35 pm - 4:30 amSEA-ICN
36h 55m1 stop
Multiple Airlines Logo
9:20 pm - 8:37 pmICN-SEA
15h 17m1 stop
$768Multiple Airlines
Find Deal
Sun, Oct 19 - Sun, Oct 26
Hainan Airlines Logo
11:00 am - 8:10 pmSEA-ICN
41h 10m2 stops
Hainan Airlines Logo
10:10 pm - 8:05 amICN-SEA
26h 55m2 stops
$769Hainan Airlines
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Thu, Oct 23 - Wed, Nov 12
Multiple Airlines Logo
9:03 am - 5:10 amSEA-ICN
27h 07m1 stop
Multiple Airlines Logo
9:20 pm - 10:23 amICN-SEA
30h 03m2 stops
$770Multiple Airlines
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Sun, Nov 9 - Sun, Nov 30
Multiple Airlines Logo
9:03 am - 5:10 amSEA-ICN
27h 07m1 stop
Multiple Airlines Logo
9:20 pm - 10:23 amICN-SEA
30h 03m2 stops
$773Multiple Airlines
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Sun, Nov 9 - Thu, Dec 4
Multiple Airlines Logo
1:02 pm - 3:45 pmSEA-ICN
34h 43m1 stop
Multiple Airlines Logo
9:20 pm - 8:37 pmICN-SEA
16h 17m1 stop
$779Multiple Airlines
Find Deal
Sat, Oct 18 - Sat, Nov 8
Korean Air Logo
3:50 pm - 5:40 pmSEA-ICN
32h 50m1 stop
Korean Air Logo
4:00 pm - 1:59 pmICN-SEA
14h 59m1 stop
$810Korean Air
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Wed, Nov 12 - Wed, Nov 19
Korean Air Logo
11:00 am - 3:55 pmSEA-ICN
11h 55mnonstop
Korean Air Logo
4:10 pm - 9:00 amICN-SEA
9h 50mnonstop
$815Korean Air
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Wed, Nov 12 - Wed, Nov 19
Delta Logo
12:15 pm - 4:30 pmSEA-ICN
12h 15mnonstop
Delta Logo
8:05 pm - 2:20 pmICN-SEA
10h 15mnonstop
$829Delta
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Tue, Oct 21 - Sun, Oct 26

Delta flights from Seattle to Incheon Intl Airport

Our best Delta deals on Seattle to Incheon Intl Airport flight tickets
Delta
Oct 21
SEA12:15 pmSeattle/Tacoma Intl
12h 15m
ICN4:30 pmIncheon Intl
Oct 26
ICN8:05 pmIncheon Intl
10h 15m
SEA2:20 pmSeattle/Tacoma Intl
$829
Find similar
Delta
Oct 5
SEA12:15 pmSeattle/Tacoma Intl
12h 15m
ICN4:30 pmIncheon Intl
Oct 11
ICN7:20 pmIncheon Intl
10h 10m
SEA1:30 pmSeattle/Tacoma Intl
$884
Find similar
Delta
Oct 5
SEA7:20 amSeattle/Tacoma Intl
18h 00m
1 stop
ICN5:20 pmIncheon Intl
Oct 11
ICN4:40 pmIncheon Intl
10h 00m
SEA10:40 amSeattle/Tacoma Intl
$889
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Asiana Airlines flights from Seattle to Incheon Intl Airport

Our best Asiana Airlines deals on Seattle to Incheon Intl Airport flight tickets
Asiana Airlines
Oct 26
SEA12:10 amSeattle/Tacoma Intl
12h 10m
ICN4:20 amIncheon Intl
Nov 3
ICN9:00 pmIncheon Intl
9h 55m
SEA1:55 pmSeattle/Tacoma Intl
$766
Find similar
Asiana Airlines
Nov 4
SEA12:10 amSeattle/Tacoma Intl
12h 10m
ICN5:20 amIncheon Intl
Nov 16
ICN9:00 pmIncheon Intl
9h 55m
SEA1:55 pmSeattle/Tacoma Intl
$801
Find similar
Asiana Airlines
Oct 27
SEA12:10 amSeattle/Tacoma Intl
12h 10m
ICN4:20 amIncheon Intl
Nov 13
ICN9:00 pmIncheon Intl
9h 55m
SEA1:55 pmSeattle/Tacoma Intl
$802
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 September 30, 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

Sun 10/26

12:10 am-4:20 am

Nonstop12h 10m

Incheon Intl

Mon 11/3

9:00 pm-1:55 pm

Nonstop9h 55m

$766

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Mon 10/20

4:30 pm-4:50 am

1 stop20h 20m

Incheon Intl

Sun 10/26

9:20 pm-10:25 am

2 stops29h 05m

$767

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Sun 10/19

11:35 pm-4:30 am

1 stop36h 55m

Incheon Intl

Sun 10/26

9:20 pm-8:37 pm

1 stop15h 17m

$768

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Thu 10/23

11:00 am-8:10 pm

2 stops41h 10m

Incheon Intl

Wed 11/12

10:10 pm-8:05 am

2 stops26h 55m

$769

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Sun 11/9

9:03 am-5:10 am

1 stop27h 07m

Incheon Intl

Sun 11/30

9:20 pm-10:23 am

2 stops30h 03m

$770

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Sun 11/9

9:03 am-5:10 am

1 stop27h 07m

Incheon Intl

Thu 12/4

9:20 pm-10:23 am

2 stops30h 03m

$773

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Sat 10/18

1:02 pm-3:45 pm

1 stop34h 43m

Incheon Intl

Sat 11/8

9:20 pm-8:37 pm

1 stop16h 17m

$779

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Wed 11/12

3:50 pm-5:40 pm

1 stop32h 50m

Incheon Intl

Wed 11/19

4:00 pm-1:59 pm

1 stop14h 59m

$810

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Wed 11/12

11:00 am-3:55 pm

Nonstop11h 55m

Incheon Intl

Wed 11/19

4:10 pm-9:00 am

Nonstop9h 50m

$815

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Tue 10/21

12:15 pm-4:30 pm

Nonstop12h 15m

Incheon Intl

Sun 10/26

8:05 pm-2:20 pm

Nonstop10h 15m

$829

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 cheapest month to fly to Incheon Intl Airport?

The cheapest month to fly to Incheon Intl Airport from Seattle is in February. Flight prices, which tend to average around $966, 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 February, then departing from Seattle during the month September is also very affordable. Most momondo users find prices during this month for around $975.

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 $855. If your travel schedule is flexible, try to avoid departing on a Friday because tickets tend to average around $1,024. 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 $725. 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 $1,152 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 $973 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 September 2025, prices for Seattle to Incheon Intl Airport flights are approximately 36% 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

$372

Fastest flight time

11h 40m

Direct flights

Every day
The best one-way flight to Incheon Intl Airport from Seattle in the past 72 hours is $372. The best round-trip flight deal from Seattle to Incheon Intl Airport found on momondo in the last 72 hours is $680.
The fastest flight from Seattle to Incheon Intl Airport takes 11h 40m
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 55m.

  • 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 $167Free CancellationRating
7.9
7,964 reviews
Search Delta flights
Alaska AirlinesPriceFrom $182Free CancellationRating
8.0
10,000 reviews
Search Alaska Airlines flights
United AirlinesPriceFrom $282Free CancellationRating
7.4
8,931 reviews
Search United Airlines flights
Hawaiian AirlinesPriceFrom $282Free CancellationRating
7.8
2,760 reviews
Search Hawaiian Airlines flights
Air CanadaPriceFrom $738Free CancellationRating
7.1
10,000 reviews
Search Air Canada flights
Asiana AirlinesPriceFrom $803Free CancellationRating
8.2
485 reviews
Search Asiana Airlines flights
Korean AirPriceFrom $854Free CancellationRating
8.4
1,143 reviews
Search Korean Air flights
China AirlinesPriceFrom $886Free CancellationRating
8.3
767 reviews
Search China Airlines flights
EVA AirPriceFrom $978Free CancellationRating
8.4
1,242 reviews
Search EVA Air flights
Turkish AirlinesPriceFrom $1,007Free CancellationRating
7.3
3,980 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 $854 round-trip. Over the 9 Korean Air flights for this route in a normal week, average airfare is usually $1,163 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, 485 ratings). Asiana Airlines flies from Seattle to Incheon Intl Airport around 8 times per week, with deals starting from $803 round-trip and rising to an average price of around $1,110.

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.

An easier way to manage your Incheon Intl Airport trip

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