What day of the week experiences the fewest flight delays on this route?

Saturday is statistically the day of the week which experiences the fewest number of delays on this flight route. Sunday has historically seen more delays on average compared to the rest of the week.

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

Asiana Airlines, Korean Air, and Delta are the most popular carriers operating from Seattle/Tacoma Intl to South Korea

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

As of December 2025, there are 47 flights per week flying from Seattle to South Korea. The most common day of the week flights depart is Mon, with 17% of flights taking off on this day.

What airlines fly to South Korea?

Alaska Airlines, Korean Air and Asiana Airlines are the top three most popular airlines that fly to South Korea from Seattle according to our data. Alaska Airlines is the first choice among our users, with 53% of people opting to fly with this airline when traveling to South Korea. Keep in mind that there are 10 different airlines that fly to South Korea on a routine basis, so you have a few additional options to choose from.

How often are flights from Seattle to South Korea delayed?

Historically, on average around 32% of flights between Seattle and South Korea have experienced a delay on any given week. The average delay length over the past 12 months has been 185 minutes.

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

The number of flights available between Seattle and South Korea is 6 per day as of December 2025. The most frequent departure time is 11:00AM, with 51% of daily flights leaving at noon.

Which airline has the best punctuality record on Seattle to South Korea flights?

According to our data, Delta have had the least number of delays on this route over the last 12 months; with about 12% of their flights experiencing any sort of delay.

What is the most punctual flight time for Seattle to South Korea flights?

Generally, flights departing in the morning tend to experience fewer delays. Flights in the evening have, in the past, seen delays more frequently in comparison.

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

Prices for flights from Seattle/Tacoma Intl Airport to South Korea are refreshed on a daily basis.

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

There are 10 operators available for flights from Seattle/Tacoma Intl Airport to South Korea as of December 2025.

How old do you have to be to fly from Seattle/Tacoma Intl Airport to South Korea?

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 South Korea.

What documentation or ID do you need to fly to South Korea?

The travel and health documents you'll need for your trip to South Korea 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 South Korea. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

$344 Cheap Flights from Seattle to South Korea in 2025/26

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Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

Enter your travel dates to find the best prices.

5:50 am - 4:00 pm

SEA

ICN

17h 10m1 stop

5:55 pm - 2:31 pm

ICN

SEA

13h 36m1 stop

$622Air Canada

Thu, Feb 12 - Wed, Feb 25

9:55 am - 10:25 pm

SEA

ICN

19h 30m2 stops

5:55 pm - 2:31 pm

ICN

SEA

13h 36m1 stop

$634Multiple Airlines

Thu, Feb 12 - Wed, Feb 25

10:10 am - 10:15 pm

SEA

ICN

20h 05m2 stops

10:40 am - 2:20 pm

ICN

SEA

19h 40m2 stops

$646Multiple Airlines

Mon, Apr 27 - Thu, May 14

10:10 am - 4:05 pm

SEA

ICN

13h 55m1 stop

5:45 pm - 6:30 pm

ICN

SEA

16h 45m1 stop

$651Air Canada

Tue, Apr 28 - Tue, May 12

12:10 am - 3:50 pm

SEA

CJU

22h 40m1 stop

9:00 am - 1:55 pm

CJU

SEA

21h 55m1 stop

$929Asiana Airlines

Sat, Jan 17 - Sun, Jan 25

1:10 am - 6:50 pm

SEA

PUS

25h 40m1 stop

11:50 am - 7:10 pm

PUS

SEA

23h 20m1 stop

$944China Airlines

Tue, Mar 17 - Tue, Mar 24

12:35 pm - 7:45 pm

SEA

TAE

15h 10m1 stop

7:40 am - 10:00 am

TAE

SEA

18h 20m1 stop

$994Korean Air

Mon, Mar 9 - Thu, Mar 12

12:50 pm - 7:45 pm

SEA

TAE

38h 55m2 stops

7:40 am - 10:00 am

TAE

SEA

18h 20m1 stop

$999Korean Air

Mon, Mar 9 - Thu, Mar 12

1:05 pm - 8:35 pm

SEA

TAE

15h 30m1 stop

7:35 am - 1:25 pm

TAE

SEA

21h 50m1 stop

$1,437Delta

Fri, Jun 5 - Sun, Jun 14

7:20 am - 8:35 pm

SEA

TAE

21h 15m2 stops

7:35 am - 7:05 pm

TAE

SEA

27h 30m2 stops

$1,762Delta

Fri, Jun 5 - Sun, Jun 14

Air Canada flights from Seattle to South Korea

Our best Air Canada deals on Seattle to South Korea flight tickets

Air Canada

Feb 12

SEA5:50 amSeattle/Tacoma Intl

17h 10m

1 stop

ICN4:00 pmIncheon Intl

Feb 25

ICN5:55 pmIncheon Intl

13h 36m

1 stop

SEA2:31 pmSeattle/Tacoma Intl

$622

Find similar

Air Canada

Apr 28

SEA10:10 amSeattle/Tacoma Intl

13h 55m

1 stop

ICN4:05 pmIncheon Intl

May 12

ICN5:45 pmIncheon Intl

16h 45m

1 stop

SEA6:30 pmSeattle/Tacoma Intl

$651

Find similar

Air Canada

Apr 28

SEA10:10 amSeattle/Tacoma Intl

13h 55m

1 stop

ICN4:05 pmIncheon Intl

May 8

ICN5:45 pmIncheon Intl

12h 35m

1 stop

SEA2:20 pmSeattle/Tacoma Intl

$665

Find similar

Hainan Airlines flights from Seattle to South Korea

Our best Hainan Airlines deals on Seattle to South Korea flight tickets

Hainan Airlines

Mar 12

SEA11:05 amSeattle/Tacoma Intl

41h 30m

2 stops

ICN8:35 pmIncheon Intl

Mar 18

ICN9:40 pmIncheon Intl

27h 25m

2 stops

SEA9:05 amSeattle/Tacoma Intl

$680

Find similar

Hainan Airlines

Mar 5

SEA10:05 amSeattle/Tacoma Intl

41h 30m

2 stops

ICN8:35 pmIncheon Intl

Mar 18

ICN9:40 pmIncheon Intl

27h 25m

2 stops

SEA9:05 amSeattle/Tacoma Intl

$702

Find similar

Fly from

Fly to

Route

Depart

Return

Price

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Thu 2/12

5:50 am-4:00 pm

1 stop17h 10m

Incheon Intl

Wed 2/25

5:55 pm-2:31 pm

1 stop13h 36m

$622

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Thu 2/12

9:55 am-10:25 pm

2 stops19h 30m

Incheon Intl

Wed 2/25

5:55 pm-2:31 pm

1 stop13h 36m

$634

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Mon 4/27

10:10 am-10:15 pm

2 stops20h 05m

Incheon Intl

Thu 5/14

10:40 am-2:20 pm

2 stops19h 40m

$646

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Tue 4/28

10:10 am-4:05 pm

1 stop13h 55m

Incheon Intl

Tue 5/12

5:45 pm-6:30 pm

1 stop16h 45m

$651

SeattleJeju City

SEA - CJU

SEACJU

Seattle/Tacoma Intl

Sat 1/17

12:10 am-3:50 pm

1 stop22h 40m

Jeju City

Sun 1/25

9:00 am-1:55 pm

1 stop21h 55m

$929

SeattleBusan

SEA - PUS

SEAPUS

Seattle/Tacoma Intl

Tue 3/17

1:10 am-6:50 pm

1 stop25h 40m

Busan Gimhae

Tue 3/24

11:50 am-7:10 pm

1 stop23h 20m

$944

SeattleDaegu

SEA - TAE

SEATAE

Seattle/Tacoma Intl

Mon 3/9

12:35 pm-7:45 pm

1 stop15h 10m

Daegu

Thu 3/12

7:40 am-10:00 am

1 stop18h 20m

$994

SeattleDaegu

SEA - TAE

SEATAE

Seattle/Tacoma Intl

Mon 3/9

12:50 pm-7:45 pm

2 stops38h 55m

Daegu

Thu 3/12

7:40 am-10:00 am

1 stop18h 20m

$999

SeattleDaegu

SEA - TAE

SEATAE

Seattle/Tacoma Intl

Fri 6/5

1:05 pm-8:35 pm

1 stop15h 30m

Daegu

Sun 6/14

7:35 am-1:25 pm

1 stop21h 50m

$1,437

SeattleDaegu

SEA - TAE

SEATAE

Seattle/Tacoma Intl

Fri 6/5

7:20 am-8:35 pm

2 stops21h 15m

Daegu

Sun 6/14

7:35 am-7:05 pm

2 stops27h 30m

$1,762

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 South Korea

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

Delays

Other information

What is the cheapest month to fly to South Korea?

If you aren’t able to travel to South Korea during the month of November, then flying in February is also cheap. Prices for this month can be found on momondo for an average of $879.

What is the cheapest day to depart on your flight to South Korea?

On average, the least expensive day to fly to South Korea from Seattle is on a Wednesday. momondo users have found tickets for Wednesday departures for as low as $718. However, this price may fluctuate depending on the airline, the season, and holidays. When flying out on a Friday, the most expensive travel day of the week, you can expect to see flight prices from Seattle to South Korea for around $959.

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

Flying to South Korea from Seattle in the evening is the least expensive time of day to depart. momondo users have found prices as low as $711 when looking at flights departing in the evening. If you have a flexible travel schedule, then try to avoid flying in the afternoon when prices are $1,401 on average. Flights to South Korea 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 South Korea flight route?

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

How far in advance should I book a flight to South Korea?

You are more likely to see cheaper flights to South Korea from Seattle when booking weeks ahead of your departure date. In general, you can expect to find flights to South Korea for around $947 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to South Korea from Seattle for as low as $593 on momondo.

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

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

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

Cheap Seattle to South Korea flight deals and tips

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

Best Price Found	$366
Fastest flight time	11h 20m
Direct flights	Every day
Airports in South Korea	24 airports

The best one-way flight to South Korea from Seattle in the past 72 hours is $366. The best round-trip flight deal from Seattle to South Korea found on momondo in the last 72 hours is $337.

The fastest flight from Seattle to South Korea takes 11h 20m

Direct flights go from Seattle to South Korea every day.

There are 24 airports in South Korea. From Seattle there are direct flights to Incheon Intl (ICN).

Search flight deals

When did momondo last update prices for flights from Seattle/Tacoma Intl Airport to South Korea?
Prices for flights from Seattle/Tacoma Intl Airport to South Korea are refreshed on a daily basis.
How many operators does momondo search for flights from Seattle/Tacoma Intl Airport to South Korea?
There are 10 operators available for flights from Seattle/Tacoma Intl Airport to South Korea as of December 2025.
How old do you have to be to fly from Seattle/Tacoma Intl Airport to South Korea?
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 South Korea.
What documentation or ID do you need to fly to South Korea?
The travel and health documents you'll need for your trip to South Korea 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 South Korea. 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 South Korea?
Based on momondo bookings for this flight route, the most popular plane model on flight routes from Seattle to South Korea is Boeing 787-10 Dreamliner (38.89% of total bookings). The next most popular plane models are Airbus A350-900 (20.53%), Boeing 777-200/200ER (13.08%), and Boeing 787-9 Dreamliner (12.79%).

Best airlines flying from Seattle to South Korea

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

Airline	Rating	Free Cancellation	Price
Delta	PriceFrom $179	Free Cancellation	Rating 7.9 8,013 reviews	Search Delta flights
United Airlines	PriceFrom $282	Free Cancellation	Rating 7.4 9,106 reviews	Search United Airlines flights
Hawaiian Airlines	PriceFrom $282	Free Cancellation	Rating 7.8 2,820 reviews	Search Hawaiian Airlines flights
Alaska Airlines	PriceFrom $335	Free Cancellation	Rating 8.0 11,513 reviews	Search Alaska Airlines flights
Air Canada	PriceFrom $611	Free Cancellation	Rating 7.1 10,551 reviews	Search Air Canada flights
Asiana Airlines	PriceFrom $797	Free Cancellation	Rating 8.2 496 reviews	Search Asiana Airlines flights
China Airlines	PriceFrom $835	Free Cancellation	Rating 8.3 792 reviews	Search China Airlines flights
Korean Air	PriceFrom $847	Free Cancellation	Rating 8.4 1,185 reviews	Search Korean Air flights
EVA Air	PriceFrom $978	Free Cancellation	Rating 8.4 1,298 reviews	Search EVA Air flights
Turkish Airlines	PriceFrom $995	Free Cancellation	Rating 7.3 4,112 reviews	Search Turkish Airlines flights

Why use momondo?

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

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 South Korea for you.

Can I find flights from Seattle to South Korea with flexible booking policies on momondo?

All flight searches from Seattle to South Korea on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from Seattle to South Korea?

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 South Korea.

I’m not ready to book a flight from Seattle to South Korea right now. Can momondo alert me if prices change?

If you are not ready to book a flight from Seattle to South Korea now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to South Korea and let you know when they change.

An easier way to manage your South Korea trip

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Find better results for your trip to South Korea

Popular cities in South Korea

Flights to Seoulfrom $588

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Flights to Jinjufrom $1,747

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Cheap flights from Seattle to South Korea 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 South Korea departing on 3/19. 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

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Air Canada flights from Seattle to South Korea

Our best Air Canada deals on Seattle to South Korea flight tickets

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Use the filters below to find and compare flights from Seattle to South Korea that are best for you.

See travel insights to South Korea from

How to get the cheapest flight ticket from Seattle to South Korea

What is the cheapest month to fly to South Korea?

If you aren’t able to travel to South Korea during the month of November, then flying in February is also cheap. Prices for this month can be found on momondo for an average of $879.

What is the cheapest day to depart on your flight to South Korea?

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

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

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

How far in advance should I book a flight to South Korea?

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

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

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

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

Asiana Airlines, Korean Air, and Delta are the most popular carriers operating from Seattle/Tacoma Intl to South Korea

What airlines fly to South Korea?

How often are flights from Seattle to South Korea delayed?

Historically, on average around 32% of flights between Seattle and South Korea have experienced a delay on any given week. The average delay length over the past 12 months has been 185 minutes.

What is the most punctual flight time for Seattle to South Korea flights?

Generally, flights departing in the morning tend to experience fewer delays. Flights in the evening have, in the past, seen delays more frequently in comparison.

What day of the week experiences the fewest flight delays on this route?

Saturday is statistically the day of the week which experiences the fewest number of delays on this flight route. Sunday has historically seen more delays on average compared to the rest of the week.

Which airline has the best punctuality record on Seattle to South Korea flights?

According to our data, Delta have had the least number of delays on this route over the last 12 months; with about 12% of their flights experiencing any sort of delay.

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

The number of flights available between Seattle and South Korea is 6 per day as of December 2025. The most frequent departure time is 11:00AM, with 51% of daily flights leaving at noon.

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

As of December 2025, there are 47 flights per week flying from Seattle to South Korea. The most common day of the week flights depart is Mon, with 17% of flights taking off on this day.

Cheap Seattle to South Korea flight deals and tips

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

Best Price Found

Fastest flight time

Direct flights

Airports in South Korea

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

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

How old do you have to be to fly from Seattle/Tacoma Intl Airport to South Korea?

What documentation or ID do you need to fly to South Korea?

What is the most popular plane model from Seattle to South Korea?

Best airlines flying from Seattle to South Korea

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

Why use momondo?

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

Can I find flights from Seattle to South Korea with flexible booking policies on momondo?

How can momondo help me find flights from Seattle to South Korea?

I’m not ready to book a flight from Seattle to South Korea right now. Can momondo alert me if prices change?

An easier way to manage your South Korea 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

Popular cities in South Korea

Popular flights according to clicks in the last 7 days on momondo