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 53% 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 8 per day as of December 2025. The most frequent departure time is 11:00AM, with 51% of daily flights leaving at noon.

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

Delta, Alaska Airlines, and Japan Airlines 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 58 per week as of December 2025. The most frequent departure day is Wed, with 19% of weekly flights leaving on this day.

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 15h 30m, 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 December 2025, 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.

$340 Cheap Flights from Washington to Seoul in 2025/26

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.

8:00 pm - 5:10 pm

SEA

ICN

28h 10m1 stop

6:55 pm - 2:31 pm

ICN

SEA

12h 36m1 stop

$704Air Canada

Thu, Jan 29 - Mon, Feb 2

9:28 am - 4:20 pm

SEA

ICN

37h 52m1 stop

9:20 pm - 10:25 am

ICN

SEA

29h 05m2 stops

$727Multiple Airlines

Thu, Mar 5 - Thu, Mar 19

11:05 am - 8:35 pm

SEA

ICN

41h 30m2 stops

9:40 pm - 9:05 am

ICN

SEA

27h 25m2 stops

$750Hainan Airlines

Thu, Mar 12 - Wed, Mar 18

10:05 am - 8:35 pm

SEA

ICN

41h 30m2 stops

9:40 pm - 9:05 am

ICN

SEA

27h 25m2 stops

$751Hainan Airlines

Thu, Mar 5 - Wed, Mar 11

12:30 pm - 10:05 pm

SEA

GMP

16h 35m1 stop

12:05 pm - 4:47 pm

GMP

SEA

21h 42m2 stops

$902Japan Airlines

Thu, Jan 22 - Thu, Jan 29

8:25 am - 10:05 pm

SEA

GMP

20h 40m2 stops

12:05 pm - 4:47 pm

GMP

SEA

21h 42m2 stops

$903Japan Airlines

Thu, Jan 22 - Thu, Jan 29

5:05 am - 4:30 pm

PSC

ICN

18h 25m1 stop

8:05 pm - 4:16 pm

ICN

PSC

13h 11m1 stop

$927Delta

Wed, Feb 4 - Mon, Feb 16

5:00 am - 4:20 am

PSC

ICN

31h 20m2 stops

11:30 am - 9:01 pm

ICN

PSC

25h 31m2 stops

$931United Airlines

Wed, Apr 8 - Tue, Apr 21

9:20 am - 4:30 pm

GEG

ICN

14h 10m1 stop

8:05 pm - 6:47 pm

ICN

GEG

15h 42m1 stop

$944Delta

Wed, Jan 21 - Sat, Feb 7

8:40 am - 5:40 am

PSC

ICN

28h 00m2 stops

6:00 pm - 1:43 pm

ICN

PSC

36h 43m2 stops

$944United Airlines

Wed, Feb 4 - Mon, Feb 16

United Airlines flights from State of Washington to Seoul

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

United Airlines

Jan 7

SEA7:30 pmSeattle/Tacoma Intl

17h 10m

1 stop

ICN5:40 amIncheon Intl

Jan 14

ICN6:00 pmIncheon Intl

14h 44m

1 stop

SEA3:44 pmSeattle/Tacoma Intl

$899

Find similar

United Airlines

Jan 7

SEA12:25 pmSeattle/Tacoma Intl

24h 15m

2 stops

ICN5:40 amIncheon Intl

Jan 16

ICN6:00 pmIncheon Intl

32h 55m

2 stops

SEA9:55 amSeattle/Tacoma Intl

$903

Find similar

United Airlines

Jan 6

SEA5:10 pmSeattle/Tacoma Intl

30h 05m

1 stop

ICN4:15 pmIncheon Intl

Jan 14

ICN6:00 pmIncheon Intl

14h 44m

1 stop

SEA3:44 pmSeattle/Tacoma Intl

$905

Find similar

Delta flights from State of Washington to Seoul

Our best Delta deals on State of Washington to Seoul flight tickets

Delta

Jan 8

SEA11:25 amSeattle/Tacoma Intl

12h 05m

ICN4:30 pmIncheon Intl

Jan 18

ICN8:05 pmIncheon Intl

10h 15m

SEA1:20 pmSeattle/Tacoma Intl

$884

Find similar

Delta

Feb 4

PSC5:05 amPasco Tri Cities

18h 25m

1 stop

ICN4:30 pmIncheon Intl

Feb 16

ICN8:05 pmIncheon Intl

13h 11m

1 stop

PSC4:16 pmPasco Tri Cities

$927

Find similar

Delta

Jan 21

GEG9:20 amSpokane

14h 10m

1 stop

ICN4:30 pmIncheon Intl

Feb 7

ICN8:05 pmIncheon Intl

15h 42m

1 stop

GEG6:47 pmSpokane

$944

Find similar

Fly from

Fly to

Route

Depart

Return

Price

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Thu 1/29

8:00 pm-5:10 pm

1 stop28h 10m

Incheon Intl

Mon 2/2

6:55 pm-2:31 pm

1 stop12h 36m

$704

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Thu 3/5

9:28 am-4:20 pm

1 stop37h 52m

Incheon Intl

Thu 3/19

9:20 pm-10:25 am

2 stops29h 05m

$727

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Thu 3/12

11:05 am-8:35 pm

2 stops41h 30m

Incheon Intl

Wed 3/18

9:40 pm-9:05 am

2 stops27h 25m

$750

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

$751

SeattleSeoul

SEA - GMP

SEAGMP

Seattle/Tacoma Intl

Thu 1/22

12:30 pm-10:05 pm

1 stop16h 35m

Seoul Gimpo Intl

Thu 1/29

12:05 pm-4:47 pm

2 stops21h 42m

$902

SeattleSeoul

SEA - GMP

SEAGMP

Seattle/Tacoma Intl

Thu 1/22

8:25 am-10:05 pm

2 stops20h 40m

Seoul Gimpo Intl

Thu 1/29

12:05 pm-4:47 pm

2 stops21h 42m

$903

PascoIncheon

PSC - ICN

PSCICN

Pasco Tri Cities

Wed 2/4

5:05 am-4:30 pm

1 stop18h 25m

Incheon Intl

Mon 2/16

8:05 pm-4:16 pm

1 stop13h 11m

$927

PascoIncheon

PSC - ICN

PSCICN

Pasco Tri Cities

Wed 4/8

5:00 am-4:20 am

2 stops31h 20m

Incheon Intl

Tue 4/21

11:30 am-9:01 pm

2 stops25h 31m

$931

SpokaneIncheon

GEG - ICN

GEGICN

Spokane

Wed 1/21

9:20 am-4:30 pm

1 stop14h 10m

Incheon Intl

Sat 2/7

8:05 pm-6:47 pm

1 stop15h 42m

$944

PascoIncheon

PSC - ICN

PSCICN

Pasco Tri Cities

Wed 2/4

8:40 am-5:40 am

2 stops28h 00m

Incheon Intl

Mon 2/16

6:00 pm-1:43 pm

2 stops36h 43m

$944

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 February is another great option to travel to Seoul, with average flight prices from State of Washington averaging around $879.

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 $718. 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 $959.

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 $711 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 $947 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 $593 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	$366
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 $366. The best round-trip flight deal from State of Washington to Seoul found on momondo in the last 72 hours is $337.

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 December 2025, 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 38.89% of the total bookings. Other popular models include Airbus A350-900 with 20.53%, Boeing 777-200/200ER with 13.08%, and Boeing 787-9 Dreamliner with 12.79%.

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 $179	Free Cancellation	Rating 7.9 8,019 reviews	Search Delta flights
United Airlines	PriceFrom $282	Free Cancellation	Rating 7.4 9,116 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 11,545 reviews	Search Alaska Airlines flights
Air Canada	PriceFrom $611	Free Cancellation	Rating 7.1 10,562 reviews	Search Air Canada flights
Asiana Airlines	PriceFrom $797	Free Cancellation	Rating 8.2 500 reviews	Search Asiana Airlines flights
Korean Air	PriceFrom $847	Free Cancellation	Rating 8.4 1,185 reviews	Search Korean Air flights
China Airlines	PriceFrom $886	Free Cancellation	Rating 8.3 793 reviews	Search China Airlines flights
EVA Air	PriceFrom $978	Free Cancellation	Rating 8.4 1,301 reviews	Search EVA Air flights
Turkish Airlines	PriceFrom $995	Free Cancellation	Rating 7.3 4,117 reviews	Search Turkish Airlines 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

Sun 1/25

Sun 2/1

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

Fly into one of these airports located in Seoul

Seoul Gimpo Intl Airport

Incheon Intl Airport

Fly to other destinations from Washington

Flights from Seattle/Tacoma Intl to Redding

Flights from Seattle/Tacoma Intl to Walla Walla

Flights from Seattle/Tacoma Intl to Las Vegas Harry Reid Intl

Flights from Seattle/Tacoma Intl to Denver Intl

Flights from Seattle/Tacoma Intl to Spokane

Flights from Seattle/Tacoma Intl to Boise Air Term. Gowen Fld

Cheap flights from Washington to Seoul from $340

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 3/26. 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

United Airlines flights from State of Washington to Seoul

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

Delta flights from State of Washington to Seoul

Our best Delta 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?

The month of February is another great option to travel to Seoul, with average flight prices from State of Washington averaging around $879.

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?

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?

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.

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

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

What airlines fly to Seoul?

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 8 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 State of Washington to Seoul on average per week?

The number of flights available between State of Washington and Seoul is 58 per week as of December 2025. The most frequent departure day is Wed, with 19% of weekly flights leaving on this day.

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 15h 30m, respectively.

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

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

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

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

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

What is the most popular plane model from State of 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?

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