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

Alaska Airlines, EVA Air, 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 53 per week as of July 2026. The most frequent departure day is Fri, with 19% of weekly flights leaving on this day.

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 7 per day as of July 2026. The most frequent departure time is 1:00PM, with 64% 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 58% of people opting to fly with this airline when traveling to Seoul. Keep in mind that there are 7 different airlines that fly to Seoul on a routine basis, so you have a few additional options to choose from.

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, 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 July 2026, there are 8 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.

$369 Cheap Flights from Washington to Seoul in 2026

Discover deals from 900+ travel sites with momondo.

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.

9:45 pm - 8:10 pm

PDX

ICN

30h 25m

2 stops

7:45 pm - 8:50 pm

ICN

PDX

18h 05m

1 stop

$838Multiple Airlines

Wed, Aug 12 - Wed, Dec 2

2:30 pm - 6:45 pm

PDX

ICN

36h 15m

1 stop

7:45 pm - 8:50 pm

ICN

PDX

18h 05m

1 stop

$844Multiple Airlines

Wed, Aug 12 - Wed, Dec 2

12:25 pm - 10:25 pm

SEA

ICN

18h 00m

1 stop

3:10 pm - 3:32 pm

ICN

SEA

40h 22m

2 stops

$889Cathay Pacific

Tue, Sep 8 - Tue, Sep 15

10:50 am - 12:40 am

SEA

ICN

20h 50m

1 stop

1:55 am - 9:10 am

ICN

SEA

24h 15m

1 stop

$891Cathay Pacific

Wed, Nov 11 - Wed, Dec 2

2:10 am - 6:10 pm

SEA

GMP

24h 00m

1 stop

1:50 pm - 7:10 pm

GMP

SEA

21h 20m

1 stop

$1,029EVA Air

Sun, Aug 16 - Sat, Aug 29

1:30 am - 12:50 pm

SEA

GMP

19h 20m

1 stop

1:50 pm - 7:20 pm

GMP

SEA

21h 30m

1 stop

$1,042EVA Air

Thu, Sep 17 - Fri, Oct 2

6:00 am - 4:20 am

GEG

ICN

30h 20m

1 stop

11:30 am - 8:46 pm

ICN

GEG

25h 16m

2 stops

$1,097United Airlines

Mon, Aug 17 - Tue, Aug 25

1:04 pm - 4:20 am

GEG

ICN

23h 16m

1 stop

6:00 pm - 9:01 pm

ICN

GEG

20h 01m

1 stop

$1,106United Airlines

Tue, Sep 8 - Tue, Nov 10

6:15 am - 4:50 pm

PSC

ICN

18h 35m

1 stop

7:00 pm - 11:54 pm

ICN

PSC

20h 54m

1 stop

$1,106Delta

Mon, Sep 7 - Mon, Sep 14

5:25 am - 4:50 pm

PSC

ICN

19h 25m

1 stop

7:00 pm - 11:54 pm

ICN

PSC

20h 54m

1 stop

$1,107Delta

Tue, Sep 8 - Tue, Sep 15

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WestJet flights from State of Washington to Seoul

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

WestJet

Aug 23

SEA10:30 amSeattle/Tacoma Intl

16h 15m

1 stop

ICN6:45 pmIncheon Intl

Sep 13

ICN8:45 pmIncheon Intl

26h 50m

2 stops

SEA7:35 amSeattle/Tacoma Intl

$919

WestJet

Aug 29

SEA10:30 amSeattle/Tacoma Intl

16h 15m

1 stop

ICN6:45 pmIncheon Intl

Sep 19

ICN8:45 pmIncheon Intl

14h 00m

1 stop

SEA6:45 pmSeattle/Tacoma Intl

$924

WestJet

Aug 1

PDX2:30 pmPortland

36h 15m

1 stop

ICN6:45 pmIncheon Intl

Sep 13

ICN8:45 pmIncheon Intl

33h 05m

1 stop

PDX1:50 pmPortland

$988

United Airlines flights from State of Washington to Seoul

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

United Airlines

Aug 17

GEG6:00 amSpokane

30h 20m

1 stop

ICN4:20 amIncheon Intl

Aug 25

ICN11:30 amIncheon Intl

25h 16m

2 stops

GEG8:46 pmSpokane

$1,097

United Airlines

Sep 8

GEG1:04 pmSpokane

23h 16m

1 stop

ICN4:20 amIncheon Intl

Nov 10

ICN6:00 pmIncheon Intl

20h 01m

1 stop

GEG9:01 pmSpokane

$1,106

United Airlines

Oct 7

PSC1:35 pmPasco Tri Cities

22h 45m

1 stop

ICN4:20 amIncheon Intl

Oct 28

ICN11:45 amIncheon Intl

25h 03m

2 stops

PSC8:48 pmPasco Tri Cities

$1,111

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

PortlandIncheon

PDX - ICN

PDXICN

Portland

Wed 8/12

9:45 pm-8:10 pm

2 stops30h 25m

Incheon Intl

Wed 12/2

7:45 pm-8:50 pm

1 stop18h 05m

$838

PortlandIncheon

PDX - ICN

PDXICN

Portland

Wed 8/12

2:30 pm-6:45 pm

1 stop36h 15m

Incheon Intl

Wed 12/2

7:45 pm-8:50 pm

1 stop18h 05m

$844

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Tue 9/8

12:25 pm-10:25 pm

1 stop18h 00m

Incheon Intl

Tue 9/15

3:10 pm-3:32 pm

2 stops40h 22m

$889

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Wed 11/11

10:50 am-12:40 am

1 stop20h 50m

Incheon Intl

Wed 12/2

1:55 am-9:10 am

1 stop24h 15m

$891

SeattleSeoul

SEA - GMP

SEAGMP

Seattle/Tacoma Intl

Sun 8/16

2:10 am-6:10 pm

1 stop24h 00m

Seoul Gimpo Intl

Sat 8/29

1:50 pm-7:10 pm

1 stop21h 20m

$1,029

SeattleSeoul

SEA - GMP

SEAGMP

Seattle/Tacoma Intl

Thu 9/17

1:30 am-12:50 pm

1 stop19h 20m

Seoul Gimpo Intl

Fri 10/2

1:50 pm-7:20 pm

1 stop21h 30m

$1,042

SpokaneIncheon

GEG - ICN

GEGICN

Spokane

Mon 8/17

6:00 am-4:20 am

1 stop30h 20m

Incheon Intl

Tue 8/25

11:30 am-8:46 pm

2 stops25h 16m

$1,097

SpokaneIncheon

GEG - ICN

GEGICN

Spokane

Tue 9/8

1:04 pm-4:20 am

1 stop23h 16m

Incheon Intl

Tue 11/10

6:00 pm-9:01 pm

1 stop20h 01m

$1,106

Quickest round-trip

PascoIncheon

PSC - ICN

PSCICN

Pasco Tri Cities

Mon 9/7

6:15 am-4:50 pm

1 stop18h 35m

Incheon Intl

Mon 9/14

7:00 pm-11:54 pm

1 stop20h 54m

$1,106

PascoIncheon

PSC - ICN

PSCICN

Pasco Tri Cities

Tue 9/8

5:25 am-4:50 pm

1 stop19h 25m

Incheon Intl

Tue 9/15

7:00 pm-11:54 pm

1 stop20h 54m

$1,107

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 August is another great option to travel to Seoul, with average flight prices from State of Washington averaging around $374.

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 $661. 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 $867.

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 $575 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 $868 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 $834 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 $517 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?

You could potentially save up to 24% on your flight if you consider stops on a State of Washington to Seoul flight.

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	$451
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 $451. The best round-trip flight deal from State of Washington to Seoul found on momondo in the last 72 hours is $858.

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 July 2026, there are 8 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 39.14% of the total bookings. Other popular models include Airbus A350-900 with 24.23%, Boeing 777-200/200ER with 11.79%, and Boeing 787-9 Dreamliner with 8.22%.

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 2,821 reviews	Search Hawaiian Airlines flights
Alaska Airlines	PriceFrom $335	Free Cancellation	Rating 7.9 12,716 reviews	Search Alaska Airlines flights
Air Canada	PriceFrom $523	Free Cancellation	Rating 7.1 11,386 reviews	Search Air Canada flights
Cathay Pacific	PriceFrom $686	Free Cancellation	Rating 7.6 1,431 reviews	Search Cathay Pacific flights
Asiana Airlines	PriceFrom $782	Free Cancellation	Rating 8.1 555 reviews	Search Asiana Airlines flights
Delta	PriceFrom $829	Free Cancellation	Rating 7.8 8,486 reviews	Search Delta flights
Korean Air	PriceFrom $843	Free Cancellation	Rating 8.4 1,221 reviews	Search Korean 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 $369

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 8/10. 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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WestJet flights from State of Washington to Seoul

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

United Airlines flights from State of Washington to Seoul

Our best United Airlines 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 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

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

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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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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.

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