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Cheap flights from Seattle to Seoul from $336

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.
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Cheap round-trip flights

WestJet Logo
8:40 am - 6:45 pmSEA-ICN
18h 05m1 stop
WestJet Logo
9:15 pm - 2:20 pmICN-SEA
33h 05m1 stop
$752WestJet
Find Deal
Fri, Oct 24 - Sun, Oct 26
Multiple Airlines Logo
10:08 am - 4:20 pmSEA-ICN
38h 12m1 stop
Multiple Airlines Logo
9:25 pm - 5:35 amICN-SEA
25h 10m1 stop
$755Multiple Airlines
Find Deal
Sat, Nov 1 - Sat, Nov 8
Multiple Airlines Logo
3:22 pm - 4:20 pmSEA-ICN
31h 58m1 stop
Multiple Airlines Logo
8:35 pm - 1:45 pmICN-SEA
10h 10mnonstop
$756Multiple Airlines
Find Deal
Thu, Nov 20 - Thu, Nov 27
Asiana Airlines Logo
12:10 am - 5:20 amSEA-ICN
12h 10mnonstop
Asiana Airlines Logo
9:00 pm - 1:55 pmICN-SEA
9h 55mnonstop
$761Asiana Airlines
Find Deal
Sun, Nov 2 - Mon, Nov 10
Asiana Airlines Logo
2:15 pm - 5:55 pmSEA-ICN
11h 40mnonstop
Asiana Airlines Logo
6:20 pm - 12:30 pmICN-SEA
10h 10mnonstop
$781Asiana Airlines
Find Deal
Mon, Sep 29 - Tue, Oct 21
Air Canada Logo
7:15 pm - 4:05 pmSEA-ICN
28h 50m1 stop
Air Canada Logo
5:45 pm - 6:36 pmICN-SEA
16h 51m1 stop
$782Air Canada
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Sun, Sep 28 - Sun, Oct 12
Korean Air Logo
12:50 pm - 4:40 pmSEA-ICN
11h 50mnonstop
Korean Air Logo
4:40 pm - 10:40 amICN-SEA
10h 00mnonstop
$795Korean Air
Find Deal
Thu, Oct 2 - Thu, Oct 16
Air Canada Logo
2:55 pm - 4:05 pmSEA-ICN
33h 10m1 stop
Air Canada Logo
5:45 pm - 10:31 pmICN-SEA
20h 46m1 stop
$812Air Canada
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Sat, Sep 27 - Sun, Oct 19
EVA Air Logo
12:10 am - 6:00 pmSEA-GMP
24h 50m1 stop
EVA Air Logo
1:50 pm - 6:10 pmGMP-SEA
21h 20m1 stop
$1,022EVA Air
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Sun, Nov 9 - Fri, Nov 14
EVA Air Logo
1:30 am - 6:10 pmSEA-GMP
24h 40m1 stop
EVA Air Logo
1:50 pm - 7:30 pmGMP-SEA
21h 40m1 stop
$1,076EVA Air
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Sun, Sep 28 - Fri, Oct 17

Asiana Airlines flights from Seattle to Seoul

Our best Asiana Airlines deals on Seattle to Seoul flight tickets
Asiana Airlines
Nov 2
SEA12:10 amSeattle/Tacoma Intl
12h 10m
ICN5:20 amIncheon Intl
Nov 10
ICN9:00 pmIncheon Intl
9h 55m
SEA1:55 pmSeattle/Tacoma Intl
$761
Find similar
Asiana Airlines
Sep 29
SEA2:15 pmSeattle/Tacoma Intl
11h 40m
ICN5:55 pmIncheon Intl
Oct 21
ICN6:20 pmIncheon Intl
10h 10m
SEA12:30 pmSeattle/Tacoma Intl
$781
Find similar
Asiana Airlines
Nov 25
SEA12:10 amSeattle/Tacoma Intl
12h 10m
ICN5:20 amIncheon Intl
Jan 26
ICN9:00 pmIncheon Intl
9h 55m
SEA1:55 pmSeattle/Tacoma Intl
$786
Find similar

Air Canada flights from Seattle to Seoul

Our best Air Canada deals on Seattle to Seoul flight tickets
Air Canada
Sep 28
SEA7:15 pmSeattle/Tacoma Intl
28h 50m
1 stop
ICN4:05 pmIncheon Intl
Oct 12
ICN5:45 pmIncheon Intl
16h 51m
1 stop
SEA6:36 pmSeattle/Tacoma Intl
$782
Find similar
Air Canada
Sep 22
SEA10:00 amSeattle/Tacoma Intl
14h 05m
1 stop
ICN4:05 pmIncheon Intl
Oct 30
ICN5:55 pmIncheon Intl
12h 36m
1 stop
SEA2:31 pmSeattle/Tacoma Intl
$792
Find similar
Air Canada
Sep 23
SEA7:15 pmSeattle/Tacoma Intl
28h 50m
1 stop
ICN4:05 pmIncheon Intl
Oct 29
ICN7:10 pmIncheon Intl
42h 56m
2 stops
SEA10:06 pmSeattle/Tacoma Intl
$798
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Seattle to Seoul 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 17, 2025.
Use the filters below to find and compare flights from Seattle to Seoul that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Fri 10/24

8:40 am-6:45 pm

1 stop18h 05m

Incheon Intl

Sun 10/26

9:15 pm-2:20 pm

1 stop33h 05m

$752

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Sat 11/1

10:08 am-4:20 pm

1 stop38h 12m

Incheon Intl

Sat 11/8

9:25 pm-5:35 am

1 stop25h 10m

$755

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Thu 11/20

3:22 pm-4:20 pm

1 stop31h 58m

Incheon Intl

Thu 11/27

8:35 pm-1:45 pm

Nonstop10h 10m

$756

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Sun 11/2

12:10 am-5:20 am

Nonstop12h 10m

Incheon Intl

Mon 11/10

9:00 pm-1:55 pm

Nonstop9h 55m

$761

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Mon 9/29

2:15 pm-5:55 pm

Nonstop11h 40m

Incheon Intl

Tue 10/21

6:20 pm-12:30 pm

Nonstop10h 10m

$781

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Sun 9/28

7:15 pm-4:05 pm

1 stop28h 50m

Incheon Intl

Sun 10/12

5:45 pm-6:36 pm

1 stop16h 51m

$782

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Thu 10/2

12:50 pm-4:40 pm

Nonstop11h 50m

Incheon Intl

Thu 10/16

4:40 pm-10:40 am

Nonstop10h 00m

$795

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Sat 9/27

2:55 pm-4:05 pm

1 stop33h 10m

Incheon Intl

Sun 10/19

5:45 pm-10:31 pm

1 stop20h 46m

$812

SeattleSeoul

SEA - GMP

SEAGMP

Seattle/Tacoma Intl

Sun 11/9

12:10 am-6:00 pm

1 stop24h 50m

Seoul Gimpo Intl

Fri 11/14

1:50 pm-6:10 pm

1 stop21h 20m

$1,022

SeattleSeoul

SEA - GMP

SEAGMP

Seattle/Tacoma Intl

Sun 9/28

1:30 am-6:10 pm

1 stop24h 40m

Seoul Gimpo Intl

Fri 10/17

1:50 pm-7:30 pm

1 stop21h 40m

$1,076

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 Seoul

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 Seoul?

The month of February is another great option to travel to Seoul, with average flight prices from Seattle averaging around $914.

What is the cheapest day to depart on your flight to Seoul?

According to our data, Monday is the cheapest day to fly to Seoul from Seattle. The lowest ticket price found for a Monday departure recently was $854. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. The most expensive day to fly to Seoul is Friday, with ticket prices averaging around $1,027.

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

Flying to Seoul from Seattle in the evening is the least expensive time of day to depart. momondo users have found prices as low as $725 when looking at flights departing in the evening. In the afternoon is when there is more demand to fly to Seoul, so prices are often more expensive at around $1,401 per ticket.

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

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

How far in advance should I book a flight to Seoul?

You are more likely to see cheaper flights to Seoul from Seattle when booking weeks ahead of your departure date. In general, you can expect to find flights to Seoul for around $1,157 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Seoul from Seattle for as low as $983 on momondo.

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

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

No. A direct flight is the cheapest option for a flight between Seattle to Seoul.

How have Seattle to Seoul flight prices changed over time?

As of September 2025, prices for Seattle to Seoul flights are approximately 44% cheaper when compared to flights at the same time last year.

When to book flights from Seattle to Seoul

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

Cheap Seattle to Seoul (SEA to SEL) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Seattle to Seoul

Best Price Found

$370

Fastest flight time

11h 40m

Direct flights

Every day

Airports in Seoul

1 airport
The best one-way flight to Seoul from Seattle in the past 72 hours is $370. The best round-trip flight deal from Seattle to Seoul found on momondo in the last 72 hours is $678.
The fastest flight from Seattle to Seoul takes 11h 40m
Direct flights go from Seattle to Seoul every day.
There is 1 airport near Seoul: Incheon Intl (ICN)
Search flight deals

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

    The distance between Seattle/Tacoma Intl and Seoul is about 5167.4 mi. By plane, this route typically takes 11h 40m.

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

    Prices for flights from Seattle/Tacoma Intl Airport to Seoul are updated daily.

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

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

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Seattle/Tacoma Intl Airport to Seoul.

  • What documentation or ID do you need to fly to Seoul?

    The travel and health documents you'll need for your trip to Seoul 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 Seoul. 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 Seoul?

  • What is the most popular airline from Seattle to Seoul?

Best airlines flying from Seattle to Seoul

Compare and see reviews for airlines that fly from Seattle to Seoul with momondo
Airline
Rating
Free Cancellation
Price
DeltaPriceFrom $167Free CancellationRating
7.9
7,961 reviews
Search Delta flights
Alaska AirlinesPriceFrom $182Free CancellationRating
8.0
10,000 reviews
Search Alaska Airlines flights
United AirlinesPriceFrom $282Free CancellationRating
7.4
8,926 reviews
Search United Airlines flights
Hawaiian AirlinesPriceFrom $645Free CancellationRating
7.8
2,729 reviews
Search Hawaiian Airlines flights
Air CanadaPriceFrom $738Free CancellationRating
7.1
10,000 reviews
Search Air Canada flights
Asiana AirlinesPriceFrom $811Free CancellationRating
8.2
481 reviews
Search Asiana Airlines flights
Korean AirPriceFrom $863Free CancellationRating
8.4
1,140 reviews
Search Korean Air flights
China AirlinesPriceFrom $886Free CancellationRating
8.3
768 reviews
Search China Airlines flights
EVA AirPriceFrom $978Free CancellationRating
8.4
1,237 reviews
Search EVA Air flights
Turkish AirlinesPriceFrom $1,007Free CancellationRating
7.3
3,965 reviews
Search Turkish Airlines flights

  • Korean Air Flights From Seattle to Seoul

    Korean Air operates around 14 flights from Seattle to Seoul every week. The average price of these flights found in the last 72 hours has been $1,174, but momondo users have found Korean Air deals from Seattle to Seoul from as low as $863 round-trip. Korean Air has been scored 8.4/10 in 1,140 reviews.

  • Asiana Airlines Flights From Seattle to Seoul

    Asiana Airlines (8.2/10 from 481 reviews) operates around 3 flights from Seattle to Seoul in any given week. The average Asiana Airlines airfare for this route is around $1,119, with deals from around $811 rare but found on momondo. Referenced prices are for round-trip Seattle to Seoul flight searches in the last 72 hours.

Why use momondo?

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

Finding the right flight to Seoul from Seattle is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Seoul quick and easy, saving you time and money.

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?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Seattle to Seoul.

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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Find better results for your trip to South Korea

Fly into one of these airports located in Seoul

Airports listed have a maximum distance of 30.3 mi from Seoul
Seoul Gimpo Intl Airport
Incheon Intl Airport