How long does it take to fly to Seoul?

If you’re flying from a popular airport in State of Washington, such as Seattle or Pasco, and flying into Seoul, then you can expect flight times to average 11h 20m and 18h 20m, respectively.

What is the cheapest airline that flies from Washington to Seoul?

United Airlines, Alaska Airlines, and Delta are the most popular carriers operating from Washington to Seoul

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

The number of flights available between State of Washington and Seoul is 46 per week as of February 2026. The most frequent departure day is Mon, with 17% of weekly flights leaving on this day.

What airlines fly to Seoul?

Alaska Airlines, Korean Air and Asiana Airlines are the top three most popular airlines that fly to Seoul from State of Washington according to our data. Alaska Airlines is the first choice among our users, with 55% of people opting to fly with this airline when traveling to Seoul. Keep in mind that there are 10 different airlines that fly to Seoul on a routine basis, so you have a few additional options to choose from.

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

The number of flights available between State of Washington and Seoul is 6 per day as of February 2026. The most frequent departure time is 11:00AM, with 50% of daily flights leaving at noon.

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

Prices for flights from Washington to Seoul are updated daily.

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

As of February 2026, there are 10 operators available to choose from for flights from Washington to Seoul.

How old do you have to be to fly from Washington 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 Washington to Seoul.

What documentation or ID do you need to fly to Seoul?

The required travel and health documents for your Seoul 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 Seoul. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$348 Cheap Flights from Washington to Seoul in 2026

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Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

Enter your travel dates to find the best prices.

5:40 am - 9:20 pm

SEA

ICN

23h 40m

2 stops

8:40 pm - 9:35 am

ICN

SEA

28h 55m

2 stops

$641Multiple Airlines

Tue, Apr 14 - Tue, Apr 28

3:40 pm - 1:45 pm

SEA

ICN

30h 05m

2 stops

8:40 pm - 9:35 am

ICN

SEA

28h 55m

2 stops

$644Multiple Airlines

Wed, Apr 22 - Tue, Apr 28

8:00 pm - 4:05 pm

SEA

ICN

28h 05m

1 stop

8:40 pm - 9:35 am

ICN

SEA

28h 55m

2 stops

$653Multiple Airlines

Fri, Apr 17 - Sat, Apr 25

5:40 am - 4:05 pm

SEA

ICN

18h 25m

1 stop

5:45 pm - 2:20 pm

ICN

SEA

12h 35m

1 stop

$672Air Canada

Tue, Apr 14 - Tue, May 5

11:45 am - 10:25 pm

SEA

ICN

18h 40m

1 stop

3:10 pm - 10:05 am

ICN

SEA

34h 55m

1 stop

$685Cathay Pacific

Wed, Apr 22 - Wed, May 13

11:45 am - 10:25 pm

SEA

ICN

18h 40m

1 stop

8:00 am - 10:05 am

ICN

SEA

18h 05m

1 stop

$686Cathay Pacific

Wed, Apr 22 - Tue, May 12

1:30 pm - 10:05 pm

SEA

GMP

16h 35m

1 stop

8:00 am - 10:55 am

GMP

SEA

18h 55m

1 stop

$917Japan Airlines

Mon, Mar 9 - Mon, Mar 16

1:15 pm - 10:40 am

SEA

GMP

29h 25m

1 stop

8:00 am - 10:35 am

GMP

SEA

18h 35m

1 stop

$920Japan Airlines

Tue, Apr 21 - Tue, May 12

6:30 am - 4:50 pm

PSC

ICN

18h 20m

1 stop

7:00 pm - 4:20 pm

ICN

PSC

13h 20m

1 stop

$928Delta

Sat, Aug 22 - Mon, Aug 31

5:25 am - 4:50 pm

PSC

ICN

19h 25m

1 stop

7:00 pm - 11:48 am

ICN

PSC

32h 48m

1 stop

$976Delta

Tue, Apr 7 - Tue, Apr 14

Cathay Pacific flights from State of Washington to Seoul

Our best Cathay Pacific deals on State of Washington to Seoul flight tickets

Cathay Pacific

Apr 22

SEA11:45 amSeattle/Tacoma Intl

18h 40m

1 stop

ICN10:25 pmIncheon Intl

May 13

ICN3:10 pmIncheon Intl

34h 55m

1 stop

SEA10:05 amSeattle/Tacoma Intl

$685

Cathay Pacific

Apr 22

SEA11:45 amSeattle/Tacoma Intl

18h 40m

1 stop

ICN10:25 pmIncheon Intl

May 12

ICN8:00 amIncheon Intl

18h 05m

1 stop

SEA10:05 amSeattle/Tacoma Intl

$686

Cathay Pacific

Apr 23

SEA11:45 amSeattle/Tacoma Intl

18h 40m

1 stop

ICN10:25 pmIncheon Intl

May 10

ICN8:05 pmIncheon Intl

30h 00m

1 stop

SEA10:05 amSeattle/Tacoma Intl

$691

Air Canada flights from State of Washington to Seoul

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

Air Canada

Apr 14

SEA5:40 amSeattle/Tacoma Intl

18h 25m

1 stop

ICN4:05 pmIncheon Intl

May 5

ICN5:45 pmIncheon Intl

12h 35m

1 stop

SEA2:20 pmSeattle/Tacoma Intl

$672

Air Canada

Apr 12

SEA8:00 pmSeattle/Tacoma Intl

28h 05m

1 stop

ICN4:05 pmIncheon Intl

Apr 18

ICN5:45 pmIncheon Intl

17h 35m

1 stop

SEA7:20 pmSeattle/Tacoma Intl

$714

Air Canada

Apr 10

SEA8:00 pmSeattle/Tacoma Intl

28h 05m

1 stop

ICN4:05 pmIncheon Intl

Apr 18

ICN5:45 pmIncheon Intl

17h 35m

1 stop

SEA7:20 pmSeattle/Tacoma Intl

$757

Fly from

Fly to

Route

Depart

Return

Price

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Tue 4/14

5:40 am-9:20 pm

2 stops23h 40m

Incheon Intl

Tue 4/28

8:40 pm-9:35 am

2 stops28h 55m

$641

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Wed 4/22

3:40 pm-1:45 pm

2 stops30h 05m

Incheon Intl

Tue 4/28

8:40 pm-9:35 am

2 stops28h 55m

$644

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Fri 4/17

8:00 pm-4:05 pm

1 stop28h 05m

Incheon Intl

Sat 4/25

8:40 pm-9:35 am

2 stops28h 55m

$653

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Tue 4/14

5:40 am-4:05 pm

1 stop18h 25m

Incheon Intl

Tue 5/5

5:45 pm-2:20 pm

1 stop12h 35m

$672

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Wed 4/22

11:45 am-10:25 pm

1 stop18h 40m

Incheon Intl

Wed 5/13

3:10 pm-10:05 am

1 stop34h 55m

$685

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Wed 4/22

11:45 am-10:25 pm

1 stop18h 40m

Incheon Intl

Tue 5/12

8:00 am-10:05 am

1 stop18h 05m

$686

SeattleSeoul

SEA - GMP

SEAGMP

Seattle/Tacoma Intl

Mon 3/9

1:30 pm-10:05 pm

1 stop16h 35m

Seoul Gimpo Intl

Mon 3/16

8:00 am-10:55 am

1 stop18h 55m

$917

SeattleSeoul

SEA - GMP

SEAGMP

Seattle/Tacoma Intl

Tue 4/21

1:15 pm-10:40 am

1 stop29h 25m

Seoul Gimpo Intl

Tue 5/12

8:00 am-10:35 am

1 stop18h 35m

$920

PascoIncheon

PSC - ICN

PSCICN

Pasco Tri Cities

Sat 8/22

6:30 am-4:50 pm

1 stop18h 20m

Incheon Intl

Mon 8/31

7:00 pm-4:20 pm

1 stop13h 20m

$928

PascoIncheon

PSC - ICN

PSCICN

Pasco Tri Cities

Tue 4/7

5:25 am-4:50 pm

1 stop19h 25m

Incheon Intl

Tue 4/14

7:00 pm-11:48 am

1 stop32h 48m

$976

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 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

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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 State of Washington 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 State of Washington. The lowest ticket price found for a Wednesday departure recently was $684. 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 $928.

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

Flying to Seoul from State of Washington in the evening is the least expensive time of day to depart. momondo users have found prices as low as $713 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 Washington to Seoul flight route?

Fly from Seattle/Tacoma Intl to Incheon Intl for the best Washington - 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 State of Washington when booking weeks ahead of your departure date. In general, you can expect to find flights to Seoul for around $888 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Seoul from State of Washington for as low as $602 on momondo.

What cabin class options are available on Washington to Seoul flights?

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

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

Cheap State of Washington to Seoul flight deals and tips

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

Best Price Found	$352
Fastest flight time	11h 20m
Direct flights	Every day
Airports in Seoul	2 airports

The best one-way flight to Seoul from State of Washington in the past 72 hours is $352. The best round-trip flight deal from State of Washington to Seoul found on momondo in the last 72 hours is $667.

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

Direct flights go from State of Washington to Seoul every day.

There are 2 airports in Seoul. 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 Seoul?
Prices for flights from Washington to Seoul are updated daily.
How many operators does momondo search for flights from Washington to Seoul?
As of February 2026, there are 10 operators available to choose from for flights from Washington to Seoul.
How old do you have to be to fly from Washington 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 Washington to Seoul.
What documentation or ID do you need to fly to Seoul?
The required travel and health documents for your Seoul 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 Seoul. 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 Seoul?
Based on momondo bookings for flights between State of Washington and Seoul, the leading plane model is Boeing 787-10 Dreamliner, making up 40.22% of the total bookings. Other popular models include Airbus A350-900 with 21.87%, Boeing 777-200/200ER with 13.63%, and Boeing 787-9 Dreamliner with 12.23%.

Best airlines flying from State of Washington to Seoul

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

Airline	Rating	Free Cancellation	Price
Delta	PriceFrom $212	Free Cancellation	Rating 7.9 8,239 reviews	Search Delta flights
United Airlines	PriceFrom $282	Free Cancellation	Rating 7.4 9,344 reviews	Search United Airlines flights
Hawaiian Airlines	PriceFrom $282	Free Cancellation	Rating 7.8 2,836 reviews	Search Hawaiian Airlines flights
Alaska Airlines	PriceFrom $335	Free Cancellation	Rating 8.0 11,948 reviews	Search Alaska Airlines flights
Air Canada	PriceFrom $527	Free Cancellation	Rating 7.1 10,742 reviews	Search Air Canada flights
Asiana Airlines	PriceFrom $687	Free Cancellation	Rating 8.1 502 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 1,195 reviews	Search Korean Air flights
China Airlines	PriceFrom $863	Free Cancellation	Rating 8.3 807 reviews	Search China Airlines flights
EVA Air	PriceFrom $978	Free Cancellation	Rating 8.4 1,359 reviews	Search EVA Air flights

Why use momondo?

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

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 Washington to Seoul for you.

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

Yes. All flights to Seoul from Washington on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from Washington to Seoul?

momondo provides multiple filters to help you find the best flight to Seoul 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 Seoul right now. Can momondo alert me if prices change?

Yes. momondo can track prices for Washington to Seoul 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 Seoul from $348

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 Seoul departing on 4/21. 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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Cathay Pacific flights from State of Washington to Seoul

Our best Cathay Pacific deals on State of Washington to Seoul flight tickets

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How to get the cheapest flight ticket from State of Washington 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 Washington to Seoul flight route?

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

What cabin class options are available on Washington to Seoul flights?

Can stopping save me money on State of Washington to Seoul flights?

What is the cheapest airline that flies from Washington to Seoul?

What airlines fly to Seoul?

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

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

How long does it take to fly to Seoul?

Cheap State of Washington to Seoul flight deals and tips

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

Best Price Found

Fastest flight time

Direct flights

Airports in Seoul

Best airlines flying from State of Washington to Seoul

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

Why use momondo?

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

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

How can momondo help me find flights from Washington to Seoul?

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

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

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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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