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 4 per day as of May 2026. The most frequent departure time is 12:00AM, with 62% of daily flights leaving in the afternoon.

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 57% of people opting to fly with this airline when traveling to Seoul. Keep in mind that there are 9 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 week?

The number of flights available between State of Washington and Seoul is 34 per week as of May 2026. The most frequent departure day is Sat, with 24% of weekly flights leaving on this day.

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

WestJet, Delta, and Cathay Pacific are the most popular carriers operating from Washington to Seoul

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 Spokane, and flying into Seoul, then you can expect flight times to average 11h 20m and 17h, respectively.

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 May 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.

$351 Cheap Flights from Washington to Seoul in 2026

1 adult

0 bags

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Not ready to book? to track prices.

Search flight deals

Find the cheapest flights from Washington to Seoul

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

Enter your travel dates to find the best prices.

7:00 am - 6:45 pm

SEA

ICN

19h 45m

1 stop

8:00 am - 6:26 pm

ICN

SEA

26h 26m

2 stops

$885Multiple Airlines

Sun, Aug 9 - Fri, Aug 28

10:30 am - 6:45 pm

SEA

ICN

16h 15m

1 stop

8:00 am - 6:26 pm

ICN

SEA

26h 26m

2 stops

$886Multiple Airlines

Mon, Aug 10 - Fri, Aug 28

12:10 am - 4:00 am

SEA

ICN

11h 50mnonstop

9:20 pm - 3:45 pm

ICN

SEA

10h 25mnonstop

$887Asiana Airlines

Thu, Jul 23 - Mon, Aug 3

12:25 pm - 10:25 pm

SEA

ICN

18h 00m

1 stop

7:35 pm - 9:10 am

ICN

SEA

30h 35m

1 stop

$888Cathay Pacific

Sat, Sep 12 - Tue, Nov 24

12:10 am - 4:00 am

SEA

ICN

11h 50mnonstop

9:20 pm - 3:45 pm

ICN

SEA

10h 25mnonstop

$889Asiana Airlines

Sun, Jul 19 - Mon, Jul 27

2:30 pm - 6:45 pm

PDX

ICN

36h 15m

1 stop

8:45 pm - 1:50 pm

ICN

PDX

33h 05m

1 stop

$896WestJet

Tue, Aug 18 - Tue, Sep 22

2:30 pm - 6:45 pm

PDX

ICN

36h 15m

1 stop

8:45 pm - 1:50 pm

ICN

PDX

33h 05m

1 stop

$942WestJet

Tue, Aug 18 - Tue, Sep 22

6:20 am - 11:55 am

GEG

ICN

37h 35m

2 stops

4:15 pm - 3:39 pm

ICN

GEG

39h 24m

2 stops

$972China Eastern

Mon, Sep 14 - Thu, Sep 17

6:20 am - 11:55 am

GEG

ICN

37h 35m

2 stops

4:20 pm - 3:39 pm

ICN

GEG

39h 19m

2 stops

$984China Eastern

Mon, Sep 14 - Thu, Sep 17

3:13 pm - 10:25 pm

EAT

ICN

39h 12m

2 stops

3:10 pm - 2:31 pm

ICN

EAT

39h 21m

2 stops

$1,243Cathay Pacific

Mon, Sep 7 - Fri, Sep 18

China Eastern flights from State of Washington to Seoul

Our best China Eastern deals on State of Washington to Seoul flight tickets

China Eastern

Sep 14

GEG6:20 amSpokane

37h 35m

2 stops

ICN11:55 amIncheon Intl

Sep 17

ICN4:20 pmIncheon Intl

39h 19m

2 stops

GEG3:39 pmSpokane

$984

China Eastern

Sep 8

GEG6:30 amSpokane

37h 25m

2 stops

ICN11:55 amIncheon Intl

Nov 10

ICN12:55 pmIncheon Intl

49h 42m

2 stops

GEG9:37 pmSpokane

$990

China Eastern

Sep 8

GEG6:30 amSpokane

40h 40m

2 stops

ICN3:10 pmIncheon Intl

Nov 10

ICN4:10 pmIncheon Intl

46h 27m

2 stops

GEG9:37 pmSpokane

$1,113

Asiana Airlines flights from State of Washington to Seoul

Our best Asiana Airlines deals on State of Washington to Seoul flight tickets

Asiana Airlines

Jul 23

SEA12:10 amSeattle/Tacoma Intl

11h 50m

ICN4:00 amIncheon Intl

Aug 3

ICN9:20 pmIncheon Intl

10h 25m

SEA3:45 pmSeattle/Tacoma Intl

$887

Asiana Airlines

Jul 19

SEA12:10 amSeattle/Tacoma Intl

11h 50m

ICN4:00 amIncheon Intl

Jul 27

ICN9:20 pmIncheon Intl

10h 25m

SEA3:45 pmSeattle/Tacoma Intl

$889

Asiana Airlines

Jul 30

SEA12:10 amSeattle/Tacoma Intl

11h 50m

ICN4:00 amIncheon Intl

Aug 20

ICN9:20 pmIncheon Intl

10h 25m

SEA3:45 pmSeattle/Tacoma Intl

$890

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Sun 8/9

7:00 am-6:45 pm

1 stop19h 45m

Incheon Intl

Fri 8/28

8:00 am-6:26 pm

2 stops26h 26m

$885

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Mon 8/10

10:30 am-6:45 pm

1 stop16h 15m

Incheon Intl

Fri 8/28

8:00 am-6:26 pm

2 stops26h 26m

$886

Quickest round-trip

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Thu 7/23

12:10 am-4:00 am

Nonstop11h 50m

Incheon Intl

Mon 8/3

9:20 pm-3:45 pm

Nonstop10h 25m

$887

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Sat 9/12

12:25 pm-10:25 pm

1 stop18h 00m

Incheon Intl

Tue 11/24

7:35 pm-9:10 am

1 stop30h 35m

$888

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Sun 7/19

12:10 am-4:00 am

Nonstop11h 50m

Incheon Intl

Mon 7/27

9:20 pm-3:45 pm

Nonstop10h 25m

$889

PortlandIncheon

PDX - ICN

PDXICN

Portland

Tue 8/18

2:30 pm-6:45 pm

1 stop36h 15m

Incheon Intl

Tue 9/22

8:45 pm-1:50 pm

1 stop33h 05m

$896

PortlandIncheon

PDX - ICN

PDXICN

Portland

Tue 8/18

2:30 pm-6:45 pm

1 stop36h 15m

Incheon Intl

Tue 9/22

8:45 pm-1:50 pm

1 stop33h 05m

$942

SpokaneIncheon

GEG - ICN

GEGICN

Spokane

Mon 9/14

6:20 am-11:55 am

2 stops37h 35m

Incheon Intl

Thu 9/17

4:15 pm-3:39 pm

2 stops39h 24m

$972

SpokaneIncheon

GEG - ICN

GEGICN

Spokane

Mon 9/14

6:20 am-11:55 am

2 stops37h 35m

Incheon Intl

Thu 9/17

4:20 pm-3:39 pm

2 stops39h 19m

$984

WenatcheeIncheon

EAT - ICN

EATICN

Wenatchee Pangborn Field

Mon 9/7

3:13 pm-10:25 pm

2 stops39h 12m

Incheon Intl

Fri 9/18

3:10 pm-2:31 pm

2 stops39h 21m

$1,243

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 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

Airlines

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 $333.

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 $671. 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 $886.

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

Flying to Seoul from State of Washington at noon is the least expensive time of day to depart. momondo users have found prices as low as $717 when looking at flights departing at noon. In the morning is when there is more demand to fly to Seoul, so prices are often more expensive at around $875 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 from Washington 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 $859 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 $588 on momondo.

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

There are 3 cabin classes available to choose from on State of 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	$479
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 $479. The best round-trip flight deal from State of Washington to Seoul found on momondo in the last 72 hours is $851.

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

Frequently asked questions about flying from Washington to Seoul

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 May 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 38.84% of the total bookings. Other popular models include Airbus A350-900 with 25.72%, Boeing 777-200/200ER with 11.77%, and Boeing 787-9 Dreamliner with 9.37%.

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
Hawaiian Airlines	PriceFrom $160	Free Cancellation	Rating 7.8 2,833 reviews	Search Hawaiian Airlines flights
Alaska Airlines	PriceFrom $335	Free Cancellation	Rating 7.9 12,440 reviews	Search Alaska Airlines flights
Air Canada	PriceFrom $524	Free Cancellation	Rating 7.1 11,107 reviews	Search Air Canada flights
Asiana Airlines	PriceFrom $798	Free Cancellation	Rating 8.1 535 reviews	Search Asiana Airlines flights
Delta	PriceFrom $838	Free Cancellation	Rating 7.9 8,412 reviews	Search Delta flights
Korean Air	PriceFrom $843	Free Cancellation	Rating 8.4 1,217 reviews	Search Korean Air flights
China Airlines	PriceFrom $847	Free Cancellation	Rating 8.3 826 reviews	Search China Airlines flights
EVA Air	PriceFrom $1,019	Free Cancellation	Rating 8.5 1,465 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.

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

Tue 6/30

Tue 7/7

Email me momondo's favorite deals

By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to South Korea

Nearby airports

Airlines

Cabin classes

Other South Korea destinations

Other flights from Washington

Complete your trip

Feeling lucky

Fly into one of these airports located in Seoul

Seoul Gimpo Intl Airport

Incheon Intl Airport

Cheap flights from Washington to Seoul from $362

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 8/1. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

Big names and deals

Big names and deals

Filter for what you want

Filter for what you want

Trusted and free

Trusted and free

Price Alerts

Price Alerts

Find the cheapest flights from Washington to Seoul

Cheap round-trip flights

Cheap one-way flights

Cheap last minute flights

Cheap direct flights

China Eastern flights from State of Washington to Seoul

Our best China Eastern deals on State of Washington to Seoul flight tickets

Asiana Airlines flights from State of Washington to Seoul

Our best Asiana Airlines deals on State of Washington to Seoul flight tickets

momondo Fare Finder

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

See travel insights to Seoul from

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 from Washington to Seoul?

What cabin class options are available on State of 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

Frequently asked questions about flying from Washington to 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?

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

Cabin classes currently available on flights to Seoul

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

Popular cities in South Korea

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

Fly to other destinations from Washington

According to popular flight searches on momondo this year

Complete your trip to Seoul

Explore popular destinations other users love

According to popular flight searches on momondo this year