Latest deals
Insights
When to book
FAQs
Reviews
Price Alerts

Cheap flights from Seattle to Seoul from $340

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 2/5. 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

Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
12:35 pm - 5:40 am
SEA
-
ICN
24h 05m1 stop
United Airlines Logo
7:25 pm - 1:20 pm
ICN
-
SEA
34h 55m2 stops
$652United Airlines
Mon, Jan 26 - Wed, Jan 28
Hainan Airlines Logo
11:05 am - 8:35 pm
SEA
-
ICN
41h 30m2 stops
Hainan Airlines Logo
9:15 pm - 9:05 am
ICN
-
SEA
27h 50m2 stops
$670Hainan Airlines
Thu, Mar 19 - Wed, Apr 1
Multiple Airlines Logo
10:05 am - 8:35 pm
SEA
-
ICN
41h 30m2 stops
Multiple Airlines Logo
9:20 pm - 10:22 am
ICN
-
SEA
30h 02m2 stops
$722Multiple Airlines
Thu, Jan 22 - Thu, Jan 29
Multiple Airlines Logo
10:05 am - 8:35 pm
SEA
-
ICN
41h 30m2 stops
Multiple Airlines Logo
9:20 pm - 6:49 pm
ICN
-
SEA
14h 29m1 stop
$734Multiple Airlines
Thu, Jan 22 - Sat, Jan 31
Hainan Airlines Logo
11:05 am - 8:35 pm
SEA
-
ICN
41h 30m2 stops
Hainan Airlines Logo
9:15 pm - 9:05 am
ICN
-
SEA
27h 50m2 stops
$739Hainan Airlines
Thu, Mar 26 - Wed, Apr 8
Multiple Airlines Logo
10:05 am - 8:35 pm
SEA
-
ICN
41h 30m2 stops
Multiple Airlines Logo
9:20 pm - 10:25 am
ICN
-
SEA
30h 05m2 stops
$749Multiple Airlines
Thu, Jan 29 - Sun, Feb 22
Multiple Airlines Logo
10:05 am - 8:35 pm
SEA
-
ICN
41h 30m2 stops
Multiple Airlines Logo
6:55 pm - 9:31 am
ICN
-
SEA
31h 36m1 stop
$755Multiple Airlines
Thu, Jan 22 - Thu, Jan 29
Multiple Airlines Logo
11:05 pm - 9:35 pm
SEA
-
ICN
29h 30m1 stop
Multiple Airlines Logo
9:20 pm - 10:25 am
ICN
-
SEA
30h 05m2 stops
$756Multiple Airlines
Sat, Jan 24 - Sat, Jan 31
Japan Airlines Logo
12:30 pm - 10:05 pm
SEA
-
GMP
16h 35m1 stop
Japan Airlines Logo
8:00 am - 4:04 pm
GMP
-
SEA
25h 04m2 stops
$884Japan Airlines
Mon, Jan 26 - Wed, Feb 18
Japan Airlines Logo
8:25 am - 10:05 pm
SEA
-
GMP
20h 40m2 stops
Japan Airlines Logo
12:05 pm - 4:47 pm
GMP
-
SEA
21h 42m2 stops
$886Japan Airlines
Wed, Jan 14 - Thu, Jan 22

United Airlines flights from Seattle to Seoul

Our best United Airlines deals on Seattle to Seoul flight tickets
United Airlines
Jan 26
SEA12:35 pmSeattle/Tacoma Intl
24h 05m
1 stop
ICN5:40 amIncheon Intl
Jan 28
ICN7:25 pmIncheon Intl
34h 55m
2 stops
SEA1:20 pmSeattle/Tacoma Intl
$652
Find similar
United Airlines
Dec 15
SEA1:05 pmSeattle/Tacoma Intl
23h 35m
1 stop
ICN5:40 amIncheon Intl
Dec 24
ICN9:00 amIncheon Intl
32h 59m
2 stops
SEA12:59 amSeattle/Tacoma Intl
$1,245
Find similar
United Airlines
Dec 15
SEA5:00 amSeattle/Tacoma Intl
31h 40m
2 stops
ICN5:40 amIncheon Intl
Dec 24
ICN9:00 amIncheon Intl
32h 59m
2 stops
SEA12:59 amSeattle/Tacoma Intl
$1,250
Find similar

Hainan Airlines flights from Seattle to Seoul

Our best Hainan Airlines deals on Seattle to Seoul flight tickets
Hainan Airlines
Mar 19
SEA11:05 amSeattle/Tacoma Intl
41h 30m
2 stops
ICN8:35 pmIncheon Intl
Apr 1
ICN9:15 pmIncheon Intl
27h 50m
2 stops
SEA9:05 amSeattle/Tacoma Intl
$670
Find similar
Hainan Airlines
Mar 26
SEA11:05 amSeattle/Tacoma Intl
41h 30m
2 stops
ICN8:35 pmIncheon Intl
Apr 8
ICN9:15 pmIncheon Intl
27h 50m
2 stops
SEA9:05 amSeattle/Tacoma Intl
$739
Find similar
Hainan Airlines
Mar 19
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
$759
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 December 9, 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

Mon 1/26

12:35 pm-5:40 am

1 stop24h 05m

Incheon Intl

Wed 1/28

7:25 pm-1:20 pm

2 stops34h 55m

$652

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Thu 3/19

11:05 am-8:35 pm

2 stops41h 30m

Incheon Intl

Wed 4/1

9:15 pm-9:05 am

2 stops27h 50m

$670

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Thu 1/22

10:05 am-8:35 pm

2 stops41h 30m

Incheon Intl

Thu 1/29

9:20 pm-10:22 am

2 stops30h 02m

$722

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Thu 1/22

10:05 am-8:35 pm

2 stops41h 30m

Incheon Intl

Sat 1/31

9:20 pm-6:49 pm

1 stop14h 29m

$734

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

$739

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Thu 1/29

10:05 am-8:35 pm

2 stops41h 30m

Incheon Intl

Sun 2/22

9:20 pm-10:25 am

2 stops30h 05m

$749

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Thu 1/22

10:05 am-8:35 pm

2 stops41h 30m

Incheon Intl

Thu 1/29

6:55 pm-9:31 am

1 stop31h 36m

$755

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Sat 1/24

11:05 pm-9:35 pm

1 stop29h 30m

Incheon Intl

Sat 1/31

9:20 pm-10:25 am

2 stops30h 05m

$756

SeattleSeoul

SEA - GMP

SEAGMP

Seattle/Tacoma Intl

Mon 1/26

12:30 pm-10:05 pm

1 stop16h 35m

Seoul Gimpo Intl

Wed 2/18

8:00 am-4:04 pm

2 stops25h 04m

$884

SeattleSeoul

SEA - GMP

SEAGMP

Seattle/Tacoma Intl

Wed 1/14

8:25 am-10:05 pm

2 stops20h 40m

Seoul Gimpo Intl

Thu 1/22

12:05 pm-4:47 pm

2 stops21h 42m

$886

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 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 $871.

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 $721. 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 $964.

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 $952 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 $593 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 December 2025, prices for Seattle to Seoul flights are approximately 32% 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

$367

Fastest flight time

11h 20m

Direct flights

Every day

Airports in Seoul

1 airport
The best one-way flight to Seoul from Seattle in the past 72 hours is $367. The best round-trip flight deal from Seattle to Seoul found on momondo in the last 72 hours is $337.
The fastest flight from Seattle to Seoul takes 11h 20m
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 55m.

  • 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 $168Free CancellationRating
7.9
8,007 reviews
Search Delta flights
United AirlinesPriceFrom $282Free CancellationRating
7.4
9,091 reviews
Search United Airlines flights
Hawaiian AirlinesPriceFrom $282Free CancellationRating
7.8
2,818 reviews
Search Hawaiian Airlines flights
Alaska AirlinesPriceFrom $335Free CancellationRating
8.0
11,423 reviews
Search Alaska Airlines flights
Air CanadaPriceFrom $610Free CancellationRating
7.1
10,515 reviews
Search Air Canada flights
Asiana AirlinesPriceFrom $798Free CancellationRating
8.2
492 reviews
Search Asiana Airlines flights
Korean AirPriceFrom $847Free CancellationRating
8.4
1,183 reviews
Search Korean Air flights
China AirlinesPriceFrom $886Free CancellationRating
8.2
788 reviews
Search China Airlines flights
EVA AirPriceFrom $978Free CancellationRating
8.4
1,296 reviews
Search EVA Air flights
Turkish AirlinesPriceFrom $1,007Free CancellationRating
7.3
4,087 reviews
Search Turkish Airlines flights

  • Korean Air Flights From Seattle to Seoul

    Korean Air operates around 13 flights from Seattle to Seoul every week. The average price of these flights found in the last 72 hours has been $1,159, but momondo users have found Korean Air deals from Seattle to Seoul from as low as $847 round-trip. Korean Air has been scored 8.4/10 in 1,183 reviews.

  • Asiana Airlines Flights From Seattle to Seoul

    Asiana Airlines (8.2/10 from 492 reviews) operates around 5 flights from Seattle to Seoul in any given week. The average Asiana Airlines airfare for this route is around $1,056, with deals from around $798 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.

An easier way to manage your Seoul 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
Thu 1/8
Thu 1/15
By creating a price alert you accept our terms of use and privacy policy.

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