What is the cheapest airline that flies from Seattle/Tacoma Intl to Seoul?

Delta, Alaska Airlines, and Korean Air are the most popular carriers operating from Seattle/Tacoma Intl to Seoul

How many flights depart from Seattle to Seoul on average per week?

54 flights are operational weekly from Seattle to Seoul as of March 2026. The most popular departure day for this route is Thu, with 19% of flights per week taking off on this day.

Which airport is the most popular layover for flights between Seattle and Seoul?

Taipei City (TPE) was the most common stop: 49% of momondo users choosing 1-stop flights on this route connected there.

Which layover airport has the shortest travel time from Seattle to Seoul?

Flights connecting via Vancouver (YVR) have the shortest average one-way travel time: 14h 26m.

What airlines fly to Seoul?

Alaska Airlines, Korean Air and Asiana Airlines are the top three most popular airlines that fly to Seoul from Seattle according to our data. Alaska Airlines is the first choice among our users, with 56% of people opting to fly with this airline when traveling to Seoul. Keep in mind that there are 11 different airlines that fly to Seoul on a routine basis, so you have a few additional options to choose from.

Which layover airport has the shortest connection time from Seattle to Seoul?

Vancouver (YVR) has the shortest average layover time for this route: 2h 15m.

Which layover airport offers the lowest fares from Seattle to Seoul?

Flights via Hong Kong (HKG) offer the lowest average round-trip price of $717.

How many flights depart from Seattle to Seoul on average per day?

As of March 2026, 7 flights take off from Seattle and land in Seoul each day. The most common flight departure time for this route is 12:00PM, with 67% of daily flights taking off in the afternoon.

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?

The number of operators available for flights from Seattle/Tacoma Intl Airport to Seoul is 11 as of March 2026.

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.

$335 Cheap Flights from Seattle to Seoul in 2026

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Find the cheapest flights from Seattle to Seoul

Round-trip

One-way

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Cheap round-trip flights

Enter your travel dates to find the best prices.

11:45 am - 12:25 am

SEA

ICN

20h 40m

1 stop

8:00 am - 10:05 am

ICN

SEA

18h 05m

1 stop

$696Cathay Pacific

Mon, Apr 20 - Tue, May 5

5:40 am - 4:05 pm

SEA

ICN

18h 25m

1 stop

5:45 pm - 6:30 pm

ICN

SEA

16h 45m

1 stop

$700Air Canada

Wed, May 13 - Wed, Jun 3

11:45 am - 10:25 pm

SEA

ICN

18h 40m

1 stop

8:00 am - 10:05 am

ICN

SEA

18h 05m

1 stop

$707Cathay Pacific

Mon, Apr 20 - Tue, May 5

10:20 am - 7:10 pm

SEA

ICN

16h 50m

2 stops

5:45 pm - 6:30 pm

ICN

SEA

16h 45m

1 stop

$730Multiple Airlines

Wed, Apr 22 - Wed, May 20

12:55 am - 5:15 am

SEA

ICN

12h 20mnonstop

9:00 pm - 2:55 pm

ICN

SEA

9h 55mnonstop

$751Asiana Airlines

Thu, May 7 - Fri, May 22

12:55 am - 5:15 am

SEA

ICN

12h 20mnonstop

9:00 pm - 2:55 pm

ICN

SEA

9h 55mnonstop

$756Asiana Airlines

Fri, Apr 17 - Mon, May 4

7:35 am - 7:50 pm

SEA

GMP

44h 15m

2 stops

8:50 pm - 4:01 pm

GMP

SEA

35h 11m

2 stops

$996China Eastern

Mon, Apr 27 - Sun, May 10

12:30 am - 12:50 pm

SEA

GMP

20h 20m

1 stop

1:50 pm - 7:30 pm

GMP

SEA

21h 40m

1 stop

$1,029EVA Air

Thu, Apr 23 - Sat, May 9

1:30 am - 12:50 pm

SEA

GMP

19h 20m

1 stop

1:50 pm - 7:30 pm

GMP

SEA

21h 40m

1 stop

$1,030EVA Air

Thu, Apr 30 - Sat, May 16

7:03 am - 9:15 pm

SEA

GMP

22h 12m

2 stops

8:00 am - 10:35 am

GMP

SEA

18h 35m

1 stop

$1,036Multiple Airlines

Mon, Apr 13 - Mon, Apr 20

Air Canada flights from Seattle to Seoul

Our best Air Canada deals on Seattle to Seoul flight tickets

Air Canada

May 13

SEA5:40 amSeattle/Tacoma Intl

18h 25m

1 stop

ICN4:05 pmIncheon Intl

Jun 3

ICN5:45 pmIncheon Intl

16h 45m

1 stop

SEA6:30 pmSeattle/Tacoma Intl

$700

Air Canada

Apr 22

SEA8:00 pmSeattle/Tacoma Intl

28h 05m

1 stop

ICN4:05 pmIncheon Intl

May 20

ICN5:45 pmIncheon Intl

20h 55m

1 stop

SEA10:40 pmSeattle/Tacoma Intl

$718

Air Canada

May 22

SEA5:40 amSeattle/Tacoma Intl

18h 25m

1 stop

ICN4:05 pmIncheon Intl

May 30

ICN5:45 pmIncheon Intl

20h 55m

1 stop

SEA10:40 pmSeattle/Tacoma Intl

$781

Cathay Pacific flights from Seattle to Seoul

Our best Cathay Pacific deals on Seattle to Seoul flight tickets

Cathay Pacific

Apr 20

SEA11:45 amSeattle/Tacoma Intl

20h 40m

1 stop

ICN12:25 amIncheon Intl

May 5

ICN8:00 amIncheon Intl

18h 05m

1 stop

SEA10:05 amSeattle/Tacoma Intl

$696

Cathay Pacific

Apr 20

SEA11:45 amSeattle/Tacoma Intl

18h 40m

1 stop

ICN10:25 pmIncheon Intl

May 5

ICN8:00 amIncheon Intl

18h 05m

1 stop

SEA10:05 amSeattle/Tacoma Intl

$707

Cathay Pacific

Aug 31

SEA12:25 pmSeattle/Tacoma Intl

18h 00m

1 stop

ICN10:25 pmIncheon Intl

Sep 7

ICN8:05 pmIncheon Intl

30h 15m

1 stop

SEA10:20 amSeattle/Tacoma Intl

$713

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Mon 4/20

11:45 am-12:25 am

1 stop20h 40m

Incheon Intl

Tue 5/5

8:00 am-10:05 am

1 stop18h 05m

$696

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Wed 5/13

5:40 am-4:05 pm

1 stop18h 25m

Incheon Intl

Wed 6/3

5:45 pm-6:30 pm

1 stop16h 45m

$700

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Mon 4/20

11:45 am-10:25 pm

1 stop18h 40m

Incheon Intl

Tue 5/5

8:00 am-10:05 am

1 stop18h 05m

$707

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Wed 4/22

10:20 am-7:10 pm

2 stops16h 50m

Incheon Intl

Wed 5/20

5:45 pm-6:30 pm

1 stop16h 45m

$730

Quickest round-trip

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Thu 5/7

12:55 am-5:15 am

Nonstop12h 20m

Incheon Intl

Fri 5/22

9:00 pm-2:55 pm

Nonstop9h 55m

$751

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Fri 4/17

12:55 am-5:15 am

Nonstop12h 20m

Incheon Intl

Mon 5/4

9:00 pm-2:55 pm

Nonstop9h 55m

$756

SeattleSeoul

SEA - GMP

SEAGMP

Seattle/Tacoma Intl

Mon 4/27

7:35 am-7:50 pm

2 stops44h 15m

Seoul Gimpo Intl

Sun 5/10

8:50 pm-4:01 pm

2 stops35h 11m

$996

SeattleSeoul

SEA - GMP

SEAGMP

Seattle/Tacoma Intl

Thu 4/23

12:30 am-12:50 pm

1 stop20h 20m

Seoul Gimpo Intl

Sat 5/9

1:50 pm-7:30 pm

1 stop21h 40m

$1,029

SeattleSeoul

SEA - GMP

SEAGMP

Seattle/Tacoma Intl

Thu 4/30

1:30 am-12:50 pm

1 stop19h 20m

Seoul Gimpo Intl

Sat 5/16

1:50 pm-7:30 pm

1 stop21h 40m

$1,030

SeattleSeoul

SEA - GMP

SEAGMP

Seattle/Tacoma Intl

Mon 4/13

7:03 am-9:15 pm

2 stops22h 12m

Seoul Gimpo Intl

Mon 4/20

8:00 am-10:35 am

1 stop18h 35m

$1,036

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

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

Prices

Airlines

Layovers

Other information

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 $675. 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 $908.

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 $714 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 $879 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 $564 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 March 2026, prices for Seattle to Seoul flights are approximately 7% 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	$368
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 $368. The best round-trip flight deal from Seattle to Seoul found on momondo in the last 72 hours is $667.

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?
The number of operators available for flights from Seattle/Tacoma Intl Airport to Seoul is 11 as of March 2026.
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?
Based on momondo bookings for this flight route, the most popular plane model on flight routes from Seattle to Seoul is Boeing 787-10 Dreamliner (31.91% of total bookings). The next most popular plane models are Airbus A350-900 (21.36%), Boeing 787-9 Dreamliner (20.31%), and Boeing 777-200/200ER (9.92%).
What is the most popular airline from Seattle to Seoul?
momondo data reveals that the most frequently booked airline on the route from Seattle to Seoul is Korean Air, representing 30% of all bookings. The subsequent popular airlines are Delta at 21%, Asiana Airlines at 19%, and Alaska Airlines at 14%.

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
Delta	PriceFrom $212	Free Cancellation	Rating 7.9 8,302 reviews	Search Delta flights
United Airlines	PriceFrom $282	Free Cancellation	Rating 7.4 9,450 reviews	Search United Airlines flights
Hawaiian Airlines	PriceFrom $282	Free Cancellation	Rating 7.8 2,841 reviews	Search Hawaiian Airlines flights
Alaska Airlines	PriceFrom $335	Free Cancellation	Rating 7.9 12,078 reviews	Search Alaska Airlines flights
Air Canada	PriceFrom $524	Free Cancellation	Rating 7.1 10,818 reviews	Search Air Canada flights
Asiana Airlines	PriceFrom $674	Free Cancellation	Rating 8.1 506 reviews	Search Asiana Airlines flights
Alaska Airlines	PriceFrom $799	Free Cancellation	Rating 0.0	Search Alaska Airlines flights
Korean Air	PriceFrom $843	Free Cancellation	Rating 8.4 1,205 reviews	Search Korean Air flights
China Airlines	PriceFrom $896	Free Cancellation	Rating 8.3 814 reviews	Search China Airlines flights
EVA Air	PriceFrom $978	Free Cancellation	Rating 8.4 1,379 reviews	Search EVA Air 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 $1,027, 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 1,205 reviews.
Asiana Airlines Flights From Seattle to Seoul
Asiana Airlines (8.1/10 from 506 reviews) operates around 2 flights from Seattle to Seoul in any given week. The average Asiana Airlines airfare for this route is around $914, with deals from around $674 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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Cheap flights from Seattle to Seoul from $338

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 4/14. 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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How to get the cheapest flight ticket from Seattle to Seoul

What is the cheapest month to fly to Seoul?

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

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

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

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

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

Can stopping save me money on Seattle to Seoul flights?

How have Seattle to Seoul flight prices changed over time?

What is the cheapest airline that flies from Seattle/Tacoma Intl to Seoul?

What airlines fly to Seoul?

Which airport is the most popular layover for flights between Seattle and Seoul?

Which layover airport offers the lowest fares from Seattle to Seoul?

Which layover airport has the shortest travel time from Seattle to Seoul?

Which layover airport has the shortest connection time from Seattle to Seoul?

How many flights depart from Seattle to Seoul on average per day?

How many flights depart from Seattle to Seoul on average per week?

When to book flights from Seattle to Seoul

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

Fastest flight time

Direct flights

Airports in Seoul

Best airlines flying from Seattle to Seoul

Compare and see reviews for airlines that fly from Seattle to Seoul with momondo

Korean Air Flights From Seattle to Seoul

Asiana Airlines Flights From Seattle to Seoul

Why use momondo?

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.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

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

Fly your favorite airline to Seoul

Airlines are sorted and displayed according to clicks in the past 7 days on momondo

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List of cabin classes available on flights landing in Seoul. Availability may vary depending on flight origin and airline.

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