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Cheap flights from Seattle to Seoul from $344

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 3/12. 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

Enter your travel dates to find the best prices.
Hainan Airlines Logo
11:05 am - 8:35 pm
SEA
-
ICN
41h 30m
2 stops
Hainan Airlines Logo
9:40 pm - 9:05 am
ICN
-
SEA
27h 25m
2 stops
$679Hainan Airlines
Thu, Mar 12 - Wed, Mar 25
Cathay Pacific Logo
11:45 am - 12:40 pm
SEA
-
ICN
32h 55m
1 stop
Cathay Pacific Logo
1:55 am - 10:05 am
ICN
-
SEA
24h 10m
1 stop
$693Cathay Pacific
Thu, Apr 9 - Wed, May 6
Cathay Pacific Logo
11:45 am - 7:05 pm
SEA
-
ICN
39h 20m
1 stop
Cathay Pacific Logo
1:40 pm - 10:05 am
ICN
-
SEA
36h 25m
1 stop
$699Cathay Pacific
Wed, Apr 22 - Wed, May 6
Hainan Airlines Logo
11:05 am - 8:35 pm
SEA
-
ICN
41h 30m
2 stops
Hainan Airlines Logo
9:15 pm - 9:05 am
ICN
-
SEA
27h 50m
2 stops
$710Hainan Airlines
Thu, Mar 26 - Wed, Apr 8
Multiple Airlines Logo
11:45 am - 12:25 am
SEA
-
ICN
20h 40m
1 stop
Multiple Airlines Logo
9:15 pm - 9:05 am
ICN
-
SEA
27h 50m
2 stops
$740Multiple Airlines
Wed, May 6 - Wed, May 20
China Airlines Logo
1:15 am - 11:30 am
SEA
-
ICN
18h 15m
1 stop
China Airlines Logo
8:05 pm - 7:15 pm
ICN
-
SEA
15h 10m
1 stop
$781China Airlines
Sun, Apr 19 - Mon, May 11
Japan Airlines Logo
12:30 pm - 10:05 pm
SEA
-
GMP
16h 35m
1 stop
Japan Airlines Logo
8:00 am - 10:55 am
GMP
-
SEA
18h 55m
1 stop
$944Japan Airlines
Wed, Mar 4 - Tue, Mar 24
EVA Air Logo
1:30 am - 12:50 pm
SEA
-
GMP
19h 20m
1 stop
EVA Air Logo
1:50 pm - 6:50 pm
GMP
-
SEA
21h 00m
1 stop
$945EVA Air
Thu, Apr 30 - Sat, May 9
EVA Air Logo
12:10 am - 7:15 pm
SEA
-
GMP
26h 05m
1 stop
EVA Air Logo
1:50 pm - 6:50 pm
GMP
-
SEA
21h 00m
1 stop
$955EVA Air
Mon, Mar 2 - Sat, May 9
Japan Airlines Logo
12:30 pm - 10:05 pm
SEA
-
GMP
16h 35m
1 stop
Japan Airlines Logo
12:05 pm - 4:04 pm
GMP
-
SEA
19h 59m
2 stops
$959Japan Airlines
Mon, Mar 2 - Mon, Mar 9

Asiana Airlines flights from Seattle to Seoul

Our best Asiana Airlines deals on Seattle to Seoul flight tickets
Asiana Airlines
Feb 22
SEA12:10 amSeattle/Tacoma Intl
12h 10m
ICN5:20 amIncheon Intl
Mar 15
ICN9:00 pmIncheon Intl
9h 55m
SEA2:55 pmSeattle/Tacoma Intl
$816
Asiana Airlines
Feb 15
SEA12:10 amSeattle/Tacoma Intl
12h 10m
ICN5:20 amIncheon Intl
Mar 1
ICN9:00 pmIncheon Intl
9h 55m
SEA1:55 pmSeattle/Tacoma Intl
$817
Asiana Airlines
Feb 4
SEA12:10 amSeattle/Tacoma Intl
12h 10m
ICN5:20 amIncheon Intl
Feb 18
ICN9:00 pmIncheon Intl
9h 55m
SEA1:55 pmSeattle/Tacoma Intl
$838

Cathay Pacific flights from Seattle to Seoul

Our best Cathay Pacific deals on Seattle to Seoul flight tickets
Cathay Pacific
Apr 9
SEA11:45 amSeattle/Tacoma Intl
39h 20m
1 stop
ICN7:05 pmIncheon Intl
Apr 26
ICN3:10 pmIncheon Intl
34h 55m
1 stop
SEA10:05 amSeattle/Tacoma Intl
$693
Cathay Pacific
May 5
SEA11:45 amSeattle/Tacoma Intl
32h 55m
1 stop
ICN12:40 pmIncheon Intl
May 13
ICN1:55 amIncheon Intl
24h 10m
1 stop
SEA10:05 amSeattle/Tacoma Intl
$698
Cathay Pacific
Apr 22
SEA11:45 amSeattle/Tacoma Intl
39h 20m
1 stop
ICN7:05 pmIncheon Intl
May 6
ICN1:40 pmIncheon Intl
36h 25m
1 stop
SEA10:05 amSeattle/Tacoma Intl
$699

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 February 3, 2026.
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

Thu 3/12

11:05 am-8:35 pm

2 stops41h 30m

Incheon Intl

Wed 3/25

9:40 pm-9:05 am

2 stops27h 25m

$679

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Thu 4/9

11:45 am-12:40 pm

1 stop32h 55m

Incheon Intl

Wed 5/6

1:55 am-10:05 am

1 stop24h 10m

$693

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Wed 4/22

11:45 am-7:05 pm

1 stop39h 20m

Incheon Intl

Wed 5/6

1:40 pm-10:05 am

1 stop36h 25m

$699

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Thu 3/26

11:05 am-8:35 pm

2 stops41h 30m

Incheon Intl

Wed 4/8

9:15 pm-9:05 am

2 stops27h 50m

$710

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Wed 5/6

11:45 am-12:25 am

1 stop20h 40m

Incheon Intl

Wed 5/20

9:15 pm-9:05 am

2 stops27h 50m

$740

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Sun 4/19

1:15 am-11:30 am

1 stop18h 15m

Incheon Intl

Mon 5/11

8:05 pm-7:15 pm

1 stop15h 10m

$781

SeattleSeoul

SEA - GMP

SEAGMP

Seattle/Tacoma Intl

Wed 3/4

12:30 pm-10:05 pm

1 stop16h 35m

Seoul Gimpo Intl

Tue 3/24

8:00 am-10:55 am

1 stop18h 55m

$944

SeattleSeoul

SEA - GMP

SEAGMP

Seattle/Tacoma Intl

Thu 4/30

1:30 am-12:50 pm

1 stop19h 20m

Seoul Gimpo Intl

Sat 5/9

1:50 pm-6:50 pm

1 stop21h 00m

$945

SeattleSeoul

SEA - GMP

SEAGMP

Seattle/Tacoma Intl

Mon 3/2

12:10 am-7:15 pm

1 stop26h 05m

Seoul Gimpo Intl

Sat 5/9

1:50 pm-6:50 pm

1 stop21h 00m

$955

SeattleSeoul

SEA - GMP

SEAGMP

Seattle/Tacoma Intl

Mon 3/2

12:30 pm-10:05 pm

1 stop16h 35m

Seoul Gimpo Intl

Mon 3/9

12:05 pm-4:04 pm

2 stops19h 59m

$959

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 January is another great option to travel to Seoul, with average flight prices from Seattle averaging around $870.

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

According to our data, Wednesday is the cheapest day to fly to Seoul from Seattle. The lowest ticket price found for a Wednesday departure recently was $695. 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 $951.

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 $710 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 $916 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 $601 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 February 2026, prices for Seattle to Seoul flights are approximately 52% 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

$357

Fastest flight time

11h 20m

Direct flights

Every day

Airports in Seoul

2 airports
The best one-way flight to Seoul from Seattle in the past 72 hours is $357. The best round-trip flight deal from Seattle to Seoul found on momondo in the last 72 hours is $670.
The fastest flight from Seattle to Seoul takes 11h 20m
Direct flights go from Seattle to Seoul every day.
There are 2 airports in Seoul. From Seattle there are direct flights to 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 20m.

  • 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 $212Free CancellationRating
7.9
8,137 reviews
Search Delta flights
Hawaiian AirlinesPriceFrom $282Free CancellationRating
7.8
2,830 reviews
Search Hawaiian Airlines flights
Alaska AirlinesPriceFrom $335Free CancellationRating
8.0
11,832 reviews
Search Alaska Airlines flights
Air CanadaPriceFrom $528Free CancellationRating
7.1
10,679 reviews
Search Air Canada flights
Asiana AirlinesPriceFrom $712Free CancellationRating
8.1
502 reviews
Search Asiana Airlines flights
Korean AirPriceFrom $843Free CancellationRating
8.4
1,188 reviews
Search Korean Air flights
China AirlinesPriceFrom $869Free CancellationRating
8.3
803 reviews
Search China Airlines flights
EVA AirPriceFrom $978Free CancellationRating
8.4
1,342 reviews
Search EVA Air flights
Turkish AirlinesPriceFrom $995Free CancellationRating
7.3
4,209 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 $1,110, but momondo users have found Korean Air deals from Seattle to Seoul from as low as $843 round-trip. Korean Air has been scored 8.4/10 in 1,188 reviews.

  • Asiana Airlines Flights From Seattle to Seoul

    Asiana Airlines (8.1/10 from 502 reviews) operates around 4 flights from Seattle to Seoul in any given week. The average Asiana Airlines airfare for this route is around $1,019, with deals from around $712 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