Latest deals
Insights
When to book
FAQs
Reviews
Price Alerts

Cheap flights from Seattle to Seoul from $328

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 10/23. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

Find the cheapest flights from Seattle to Seoul (SEA-ICN)

Cheap round-trip flights

Logo
10:00 am - 4:05 pmSEA-ICN
14h 05m1 stop
Logo
9:45 am - 6:36 pmICN-SEA
24h 51m2 stops
$619
Find Deal
Wed, Sep 10 - Wed, Sep 17
Logo
10:00 am - 9:10 pmSEA-ICN
19h 10m2 stops
Logo
9:45 am - 6:36 pmICN-SEA
24h 51m2 stops
$631
Find Deal
Wed, Sep 10 - Wed, Sep 17
WestJet Logo
8:40 am - 6:45 pmSEA-ICN
18h 05m1 stop
WestJet Logo
8:45 pm - 7:14 pmICN-SEA
14h 29m1 stop
$759WestJet
Find Deal
Sat, Oct 4 - Sat, Oct 18
WestJet Logo
8:40 am - 6:45 pmSEA-ICN
18h 05m1 stop
WestJet Logo
8:45 pm - 7:14 pmICN-SEA
14h 29m1 stop
$760WestJet
Find Deal
Sat, Oct 4 - Sat, Oct 18
Air Canada Logo
5:30 am - 4:05 pmSEA-ICN
18h 35m1 stop
Air Canada Logo
5:45 pm - 2:16 pmICN-SEA
12h 31m1 stop
$763Air Canada
Find Deal
Sat, Sep 20 - Fri, Sep 26
Air Canada Logo
10:00 am - 4:05 pmSEA-ICN
14h 05m1 stop
Air Canada Logo
6:55 pm - 10:06 pmICN-SEA
20h 11m1 stop
$772Air Canada
Find Deal
Sat, Sep 6 - Sat, Nov 22
Asiana Airlines Logo
2:15 pm - 5:55 pmSEA-ICN
11h 40mnonstop
Asiana Airlines Logo
9:00 pm - 1:55 pmICN-SEA
9h 55mnonstop
$802Asiana Airlines
Find Deal
Sat, Sep 6 - Sat, Nov 22
Korean Air Logo
12:35 pm - 4:30 pmSEA-ICN
11h 55mnonstop
Korean Air Logo
4:40 pm - 10:40 amICN-SEA
10h 00mnonstop
$805Korean Air
Find Deal
Sat, Sep 13 - Sun, Sep 28
Korean Air Logo
12:35 pm - 4:30 pmSEA-ICN
11h 55mnonstop
Korean Air Logo
4:40 pm - 10:40 amICN-SEA
10h 00mnonstop
$815Korean Air
Find Deal
Sat, Sep 13 - Sun, Sep 28
Asiana Airlines Logo
2:15 pm - 5:55 pmSEA-ICN
11h 40mnonstop
Asiana Airlines Logo
9:00 pm - 2:55 pmICN-SEA
9h 55mnonstop
$822Asiana Airlines
Find Deal
Sun, Sep 21 - Sat, Nov 1

WestJet flights from Seattle to Incheon Intl Airport

Our best WestJet deals on Seattle to Incheon Intl Airport flight tickets
WestJet
Oct 4
SEA8:40 amSeattle/Tacoma Intl
18h 05m
1 stop
ICN6:45 pmIncheon Intl
Oct 18
ICN8:45 pmIncheon Intl
14h 29m
1 stop
SEA7:14 pmSeattle/Tacoma Intl
$759
Find similar
WestJet
Oct 4
SEA8:40 amSeattle/Tacoma Intl
18h 05m
1 stop
ICN6:45 pmIncheon Intl
Oct 18
ICN8:45 pmIncheon Intl
14h 29m
1 stop
SEA7:14 pmSeattle/Tacoma Intl
$760
Find similar
WestJet
Oct 3
SEA8:40 amSeattle/Tacoma Intl
18h 05m
1 stop
ICN6:45 pmIncheon Intl
Oct 25
ICN8:45 pmIncheon Intl
33h 35m
1 stop
SEA2:20 pmSeattle/Tacoma Intl
$778
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
Sep 20
SEA5:30 amSeattle/Tacoma Intl
18h 35m
1 stop
ICN4:05 pmIncheon Intl
Sep 26
ICN5:45 pmIncheon Intl
12h 31m
1 stop
SEA2:16 pmSeattle/Tacoma Intl
$763
Find similar
Air Canada
Sep 6
SEA10:00 amSeattle/Tacoma Intl
14h 05m
1 stop
ICN4:05 pmIncheon Intl
Nov 22
ICN6:55 pmIncheon Intl
20h 11m
1 stop
SEA10:06 pmSeattle/Tacoma Intl
$772
Find similar
Air Canada
Aug 31
SEA7:15 pmSeattle/Tacoma Intl
28h 50m
1 stop
ICN4:05 pmIncheon Intl
Sep 20
ICN5:45 pmIncheon Intl
16h 51m
1 stop
SEA6:36 pmSeattle/Tacoma Intl
$773
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 August 14, 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

Wed 9/10

10:00 am-4:05 pm

1 stop14h 05m

Incheon Intl

Wed 9/17

9:45 am-6:36 pm

2 stops24h 51m

$619

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Wed 9/10

10:00 am-9:10 pm

2 stops19h 10m

Incheon Intl

Wed 9/17

9:45 am-6:36 pm

2 stops24h 51m

$631

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Sat 10/4

8:40 am-6:45 pm

1 stop18h 05m

Incheon Intl

Sat 10/18

8:45 pm-7:14 pm

1 stop14h 29m

$759

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Sat 10/4

8:40 am-6:45 pm

1 stop18h 05m

Incheon Intl

Sat 10/18

8:45 pm-7:14 pm

1 stop14h 29m

$760

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Sat 9/20

5:30 am-4:05 pm

1 stop18h 35m

Incheon Intl

Fri 9/26

5:45 pm-2:16 pm

1 stop12h 31m

$763

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Sat 9/6

10:00 am-4:05 pm

1 stop14h 05m

Incheon Intl

Sat 11/22

6:55 pm-10:06 pm

1 stop20h 11m

$772

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Sat 9/6

2:15 pm-5:55 pm

Nonstop11h 40m

Incheon Intl

Sat 11/22

9:00 pm-1:55 pm

Nonstop9h 55m

$802

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Sat 9/13

12:35 pm-4:30 pm

Nonstop11h 55m

Incheon Intl

Sun 9/28

4:40 pm-10:40 am

Nonstop10h 00m

$805

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Sat 9/13

12:35 pm-4:30 pm

Nonstop11h 55m

Incheon Intl

Sun 9/28

4:40 pm-10:40 am

Nonstop10h 00m

$815

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Sun 9/21

2:15 pm-5:55 pm

Nonstop11h 40m

Incheon Intl

Sat 11/1

9:00 pm-2:55 pm

Nonstop9h 55m

$822

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

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 February. Flight prices, which tend to average around $971, 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 January is also very affordable. Most momondo users find prices during this month for around $1,022.

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 $864. If your travel schedule is flexible, try to avoid departing on a Friday because tickets tend to average around $1,032. 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 $735. 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 $1,175 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 $992 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 August 2025, prices for Seattle to Incheon Intl Airport flights are approximately 35% 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

$328

Fastest flight time

11h 25m

Direct flights

Every day
The best one-way flight to Incheon Intl Airport from Seattle in the past 72 hours is $328. The best round-trip flight deal from Seattle to Incheon Intl Airport found on momondo in the last 72 hours is $619.
The fastest flight from Seattle to Incheon Intl Airport takes 11h 25m
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 25m.

  • 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
8.0
7,980 reviews
Search Delta flights
Alaska AirlinesPriceFrom $182Free CancellationRating
8.0
10,000 reviews
Search Alaska Airlines flights
United AirlinesPriceFrom $282Free CancellationRating
7.4
8,916 reviews
Search United Airlines flights
Hawaiian AirlinesPriceFrom $763Free CancellationRating
7.8
2,656 reviews
Search Hawaiian Airlines flights
Air CanadaPriceFrom $793Free CancellationRating
7.1
9,949 reviews
Search Air Canada flights
China AirlinesPriceFrom $886Free CancellationRating
8.3
762 reviews
Search China Airlines flights
Korean AirPriceFrom $890Free CancellationRating
8.4
1,131 reviews
Search Korean Air flights
Asiana AirlinesPriceFrom $895Free CancellationRating
8.2
473 reviews
Search Asiana Airlines flights
EVA AirPriceFrom $978Free CancellationRating
8.4
1,233 reviews
Search EVA Air flights
Turkish AirlinesPriceFrom $1,007Free CancellationRating
7.3
3,940 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 $890 round-trip. Over the 14 Korean Air flights for this route in a normal week, average airfare is usually $1,188 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, 473 ratings). Asiana Airlines flies from Seattle to Incheon Intl Airport around 2 times per week, with deals starting from $895 round-trip and rising to an average price of around $1,140.

Traveling to a place near Seoul?

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

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Tue 8/19
Tue 8/26
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to Seoul

Popular cities in South Korea

Popular flights according to clicks in the last 7 days on momondo
Flights to Seoul Gimpo Intl Airportfrom $700