How long is the flight from State of Washington to South Korea?

The flight from State of Washington to South Korea depends on which airports you’re departing and arriving from and whether or not you have a layover. If you fly from Seattle (a popular airport in State of Washington) to Incheon Intl Airport (the most popular airport in South Korea), then the flight time is 11h 20m on average. If you fly from Pasco (another popular airport in State of Washington) to Incheon Intl Airport, then the average flight time is 17h 15m.

How many flights depart from State of Washington to South Korea on average per week?

47 flights are operational weekly from State of Washington to South Korea as of December 2025. The most popular departure day for this route is Mon, with 17% of flights per week taking off on this day.

What is the cheapest airline that flies from Washington to South Korea?

Asiana Airlines, Delta, and Alaska Airlines are the most popular carriers operating from Washington to South Korea

How many flights depart from State of Washington to South Korea on average per day?

As of December 2025, there are 6 flights per day flying from State of Washington to South Korea. The most common time of day flights depart is 11:00AM, with 52% of flights taking off at noon.

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 State of Washington according to our data. Alaska Airlines is the first choice among our users, with 52% 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.

When did momondo last update prices for flights from Washington to South Korea?

Prices for flights from Washington to South Korea were last updated today.

How many operators does momondo search for flights from Washington to South Korea?

There are 11 operators available for flights from Washington to South Korea as of December 2025.

How old do you have to be to fly from Washington to South Korea?

The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Washington to South Korea.

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

The required travel and health documents for your South Korea trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at South Korea. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$416 Cheap Flights from Washington to South Korea in 2025/26

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One-way

Last minute

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Cheap round-trip flights

Enter your travel dates to find the best prices.

7:30 pm - 5:40 am

SEA

ICN

17h 10m1 stop

7:25 pm - 1:20 pm

ICN

SEA

34h 55m2 stops

$652United Airlines

Mon, Jan 26 - Wed, Jan 28

10:05 am - 8:35 pm

SEA

ICN

41h 30m2 stops

9:40 pm - 9:05 am

ICN

SEA

27h 25m2 stops

$675Hainan Airlines

Thu, Mar 5 - Wed, Mar 11

10:05 am - 8:35 pm

SEA

ICN

41h 30m2 stops

9:20 pm - 10:25 am

ICN

SEA

30h 05m2 stops

$697Multiple Airlines

Thu, Feb 5 - Sun, Feb 15

10:05 am - 8:35 pm

SEA

ICN

41h 30m2 stops

9:20 pm - 6:52 pm

ICN

SEA

14h 32m1 stop

$698Multiple Airlines

Thu, Feb 5 - Tue, Feb 17

5:50 am - 4:00 pm

SEA

ICN

17h 10m1 stop

6:55 pm - 7:16 pm

ICN

SEA

17h 21m1 stop

$721Air Canada

Tue, Jan 13 - Tue, Jan 20

9:50 am - 5:10 pm

PDX

ICN

14h 20m1 stop

5:55 pm - 2:40 pm

ICN

PDX

13h 45m1 stop

$838Air Canada

Wed, Jan 28 - Wed, Feb 4

1:10 am - 11:15 am

SEA

PUS

18h 05m1 stop

12:15 pm - 7:30 pm

PUS

SEA

23h 15m1 stop

$856China Airlines

Sun, May 3 - Tue, Jun 2

1:50 am - 6:00 pm

SEA

PUS

24h 10m1 stop

7:10 pm - 7:30 pm

PUS

SEA

16h 20m1 stop

$858EVA Air

Sun, May 3 - Wed, Jun 3

1:30 am - 6:00 pm

SEA

PUS

24h 30m1 stop

7:10 pm - 7:30 pm

PUS

SEA

16h 20m1 stop

$860EVA Air

Wed, Apr 29 - Tue, Jun 2

1:10 am - 11:15 am

SEA

PUS

18h 05m1 stop

8:00 pm - 7:30 pm

PUS

SEA

15h 30m1 stop

$895China Airlines

Tue, May 5 - Tue, Jun 2

Hainan Airlines flights from State of Washington to South Korea

Our best Hainan Airlines deals on State of Washington to South Korea flight tickets

Hainan Airlines

Mar 5

SEA10:05 amSeattle/Tacoma Intl

41h 30m

2 stops

ICN8:35 pmIncheon Intl

Mar 11

ICN9:40 pmIncheon Intl

27h 25m

2 stops

SEA9:05 amSeattle/Tacoma Intl

$675

Find similar

Hainan Airlines

Jan 29

SEA10:05 amSeattle/Tacoma Intl

41h 30m

2 stops

ICN8:35 pmIncheon Intl

Feb 11

ICN9:40 pmIncheon Intl

27h 25m

2 stops

SEA8:05 amSeattle/Tacoma Intl

$689

Find similar

Hainan Airlines

Jan 29

SEA10:05 amSeattle/Tacoma Intl

41h 30m

2 stops

ICN8:35 pmIncheon Intl

Feb 11

ICN9:40 pmIncheon Intl

27h 25m

2 stops

SEA8:05 amSeattle/Tacoma Intl

$695

Find similar

Air Canada flights from State of Washington to South Korea

Our best Air Canada deals on State of Washington to South Korea flight tickets

Air Canada

Jan 13

SEA5:50 amSeattle/Tacoma Intl

17h 10m

1 stop

ICN4:00 pmIncheon Intl

Jan 20

ICN6:55 pmIncheon Intl

17h 21m

1 stop

SEA7:16 pmSeattle/Tacoma Intl

$721

Find similar

Air Canada

Apr 27

SEA8:00 pmSeattle/Tacoma Intl

28h 05m

1 stop

ICN4:05 pmIncheon Intl

May 4

ICN5:45 pmIncheon Intl

16h 45m

1 stop

SEA6:30 pmSeattle/Tacoma Intl

$750

Find similar

Air Canada

Feb 16

SEA9:55 amSeattle/Tacoma Intl

14h 15m

1 stop

ICN5:10 pmIncheon Intl

Feb 28

ICN6:55 pmIncheon Intl

20h 11m

1 stop

SEA10:06 pmSeattle/Tacoma Intl

$761

Find similar

momondo Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Mon 1/26

7:30 pm-5:40 am

1 stop17h 10m

Incheon Intl

Wed 1/28

7:25 pm-1:20 pm

2 stops34h 55m

$652

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Thu 3/5

10:05 am-8:35 pm

2 stops41h 30m

Incheon Intl

Wed 3/11

9:40 pm-9:05 am

2 stops27h 25m

$675

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Thu 2/5

10:05 am-8:35 pm

2 stops41h 30m

Incheon Intl

Sun 2/15

9:20 pm-10:25 am

2 stops30h 05m

$697

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Thu 2/5

10:05 am-8:35 pm

2 stops41h 30m

Incheon Intl

Tue 2/17

9:20 pm-6:52 pm

1 stop14h 32m

$698

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Tue 1/13

5:50 am-4:00 pm

1 stop17h 10m

Incheon Intl

Tue 1/20

6:55 pm-7:16 pm

1 stop17h 21m

$721

PortlandIncheon

PDX - ICN

PDXICN

Portland

Wed 1/28

9:50 am-5:10 pm

1 stop14h 20m

Incheon Intl

Wed 2/4

5:55 pm-2:40 pm

1 stop13h 45m

$838

SeattleBusan

SEA - PUS

SEAPUS

Seattle/Tacoma Intl

Sun 5/3

1:10 am-11:15 am

1 stop18h 05m

Busan Gimhae

Tue 6/2

12:15 pm-7:30 pm

1 stop23h 15m

$856

SeattleBusan

SEA - PUS

SEAPUS

Seattle/Tacoma Intl

Sun 5/3

1:50 am-6:00 pm

1 stop24h 10m

Busan Gimhae

Wed 6/3

7:10 pm-7:30 pm

1 stop16h 20m

$858

SeattleBusan

SEA - PUS

SEAPUS

Seattle/Tacoma Intl

Wed 4/29

1:30 am-6:00 pm

1 stop24h 30m

Busan Gimhae

Tue 6/2

7:10 pm-7:30 pm

1 stop16h 20m

$860

SeattleBusan

SEA - PUS

SEAPUS

Seattle/Tacoma Intl

Tue 5/5

1:10 am-11:15 am

1 stop18h 05m

Busan Gimhae

Tue 6/2

8:00 pm-7:30 pm

1 stop15h 30m

$895

Flights are sorted by cheapest round-trip flights first.

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How to get the cheapest flight ticket from State of Washington 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

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 January is also cheap. Prices for this month can be found on momondo for an average of $877.

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 State of Washington is on a Wednesday. momondo users have found tickets for Wednesday departures for as low as $719. 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 State of Washington to South Korea for around $961.

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

Flying to South Korea from State of Washington in the evening is the least expensive time of day to depart. momondo users have found prices as low as $712 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 State of Washington in the afternoon are generally more expensive because this time of day is more convenient for travelers’ schedules.

What is the cheapest Washington to South Korea flight route?

Fly from Seattle/Tacoma Intl to Incheon Intl for the best Washington - 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 State of Washington when booking weeks ahead of your departure date. In general, you can expect to find flights to South Korea for around $948 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to South Korea from State of Washington for as low as $593 on momondo.

What cabin class options are available on Washington to South Korea flights?

There are 3 cabin classes available to choose from on Washington 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 State of Washington to South Korea flights?

No. A direct flight is the cheapest option for a flight between State of Washington to South Korea.

Cheap State of Washington to South Korea flight deals and tips

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

Best Price Found	$358
Fastest flight time	11h 20m
Direct flights	Every day
Airports in South Korea	24 airports

The best one-way flight to South Korea from State of Washington in the past 72 hours is $358. The best round-trip flight deal from State of Washington to South Korea found on momondo in the last 72 hours is $337.

The fastest flight from State of Washington to South Korea takes 11h 20m

Direct flights go from State of Washington to South Korea every day.

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

Search flight deals

When did momondo last update prices for flights from Washington to South Korea?
Prices for flights from Washington to South Korea were last updated today.
How many operators does momondo search for flights from Washington to South Korea?
There are 11 operators available for flights from Washington to South Korea as of December 2025.
How old do you have to be to fly from Washington to South Korea?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Washington to South Korea.
What documentation or ID do you need to fly to South Korea?
The required travel and health documents for your South Korea trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at South Korea. We recommend that you seek guidance from your airline or a reliable third party such as IATA.
What is the most popular plane model from State of Washington to South Korea?
momondo data reveals that the most frequently booked plane model on the route from State of Washington to South Korea is Boeing 787-10 Dreamliner, representing 38.28% of all bookings. The subsequent popular models are Airbus A350-900 at 20.26%, Boeing 787-9 Dreamliner at 13.32%, and Boeing 777-200/200ER at 13.07%.

Best airlines flying from State of Washington to South Korea

Compare and see reviews for airlines that fly from State of Washington to South Korea with momondo

Airline	Rating	Free Cancellation	Price
Delta	PriceFrom $172	Free Cancellation	Rating 7.9 8,008 reviews	Search Delta flights
United Airlines	PriceFrom $282	Free Cancellation	Rating 7.4 9,092 reviews	Search United Airlines flights
Hawaiian Airlines	PriceFrom $282	Free Cancellation	Rating 7.8 2,819 reviews	Search Hawaiian Airlines flights
Alaska Airlines	PriceFrom $335	Free Cancellation	Rating 8.0 11,470 reviews	Search Alaska Airlines flights
Air Canada	PriceFrom $614	Free Cancellation	Rating 7.1 10,531 reviews	Search Air Canada flights
Asiana Airlines	PriceFrom $797	Free Cancellation	Rating 8.2 493 reviews	Search Asiana Airlines flights
China Airlines	PriceFrom $835	Free Cancellation	Rating 8.3 792 reviews	Search China Airlines flights
Korean Air	PriceFrom $848	Free Cancellation	Rating 8.4 1,186 reviews	Search Korean Air flights
EVA Air	PriceFrom $978	Free Cancellation	Rating 8.5 1,297 reviews	Search EVA Air flights
Turkish Airlines	PriceFrom $995	Free Cancellation	Rating 7.3 4,104 reviews	Search Turkish Airlines flights

Why use momondo?

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

Finding the right flight to South Korea from Washington 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 South Korea quick and easy, saving you time and money.

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

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

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

momondo provides multiple filters to help you find the best flight to South Korea from Washington. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

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

Yes. momondo can track prices for Washington to South Korea flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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Cheap flights from Washington to South Korea from $416

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Washington to South Korea departing on 4/19. 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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Hainan Airlines flights from State of Washington to South Korea

Our best Hainan Airlines deals on State of Washington to South Korea flight tickets

Air Canada flights from State of Washington to South Korea

Our best Air Canada deals on State of Washington to South Korea flight tickets

momondo Fare Finder

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

See travel insights to South Korea from

How to get the cheapest flight ticket from State of Washington 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 January is also cheap. Prices for this month can be found on momondo for an average of $877.

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 Washington to South Korea flight route?

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

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

What cabin class options are available on Washington to South Korea flights?

There are 3 cabin classes available to choose from on Washington 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 State of Washington to South Korea flights?

No. A direct flight is the cheapest option for a flight between State of Washington to South Korea.

What is the cheapest airline that flies from Washington to South Korea?

Asiana Airlines, Delta, and Alaska Airlines are the most popular carriers operating from Washington to South Korea

What airlines fly to South Korea?

How many flights depart from State of Washington to South Korea on average per day?

As of December 2025, there are 6 flights per day flying from State of Washington to South Korea. The most common time of day flights depart is 11:00AM, with 52% of flights taking off at noon.

How many flights depart from State of Washington to South Korea on average per week?

47 flights are operational weekly from State of Washington to South Korea as of December 2025. The most popular departure day for this route is Mon, with 17% of flights per week taking off on this day.

How long is the flight from State of Washington to South Korea?

Cheap State of Washington to South Korea flight deals and tips

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

Best Price Found

Fastest flight time

Direct flights

Airports in South Korea

When did momondo last update prices for flights from Washington to South Korea?

How many operators does momondo search for flights from Washington to South Korea?

How old do you have to be to fly from Washington to South Korea?

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

What is the most popular plane model from State of Washington to South Korea?

Best airlines flying from State of Washington to South Korea

Compare and see reviews for airlines that fly from State of Washington to South Korea with momondo

Why use momondo?

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

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

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

I’m not ready to book a flight from Washington 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