How long does it take to fly to Incheon Intl Airport?

On average, it takes 11h 20m to fly from State of Washington to Incheon Intl Airport if you fly out of Seattle (the most popular airport in State of Washington) and into Incheon Intl Airport (the most popular airport in Incheon Intl Airport). If you’re flying out of Spokane and into Incheon Intl Airport, then the flight time is around 16h 03m.

What is the cheapest airline that flies from Washington to Incheon Intl?

Asiana Airlines, Korean Air, and Delta are the most popular carriers operating from Washington to Incheon Intl

What airlines fly to Incheon Intl Airport?

Alaska Airlines, Korean Air and Asiana Airlines are the top three most popular airlines that fly to Incheon Intl Airport 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 Incheon Intl Airport. Keep in mind that there are 10 different airlines that fly to Incheon Intl Airport 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 Incheon Intl Airport?

Prices for flights from Washington to Incheon Intl Airport are updated daily.

How many operators does momondo search for flights from Washington to Incheon Intl Airport?

As of December 2025, there are 10 operators available to choose from for flights from Washington to Incheon Intl Airport.

How old do you have to be to fly from Washington to Incheon Intl Airport?

Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Washington to Incheon Intl Airport.

What documentation or ID do you need to fly to Incheon Intl Airport?

The travel and health documents you'll need for your trip to Incheon Intl Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Incheon Intl Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

$344 Cheap Flights from State of Washington to Incheon Intl Airport in 2025/26

Q: How many flights depart from State of Washington to Incheon Intl Airport on average per week?

The number of flights available between State of Washington and Incheon Intl Airport is 47 per week as of December 2025. The most frequent departure day is Mon, with 17% of weekly flights leaving on this day.

Q: How many flights depart from State of Washington to Incheon Intl Airport on average per day?

As of December 2025, there are 6 flights per day flying from State of Washington to Incheon Intl Airport. The most common time of day flights depart is 11:00AM, with 51% of flights taking off at noon.

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One-way

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Cheap round-trip flights

Enter your travel dates to find the best prices.

5:50 am - 4:00 pm

SEA

ICN

17h 10m1 stop

5:55 pm - 2:31 pm

ICN

SEA

13h 36m1 stop

$622Air Canada

Thu, Feb 12 - Wed, Feb 25

9:55 am - 10:25 pm

SEA

ICN

19h 30m2 stops

5:55 pm - 2:31 pm

ICN

SEA

13h 36m1 stop

$634Multiple Airlines

Thu, Feb 12 - Wed, Feb 25

10:10 am - 10:15 pm

SEA

ICN

20h 05m2 stops

10:40 am - 2:20 pm

ICN

SEA

19h 40m2 stops

$646Multiple Airlines

Mon, Apr 27 - Thu, May 14

10:10 am - 4:05 pm

SEA

ICN

13h 55m1 stop

5:45 pm - 6:30 pm

ICN

SEA

16h 45m1 stop

$651Air Canada

Tue, Apr 28 - Tue, May 12

10:10 am - 4:05 pm

SEA

ICN

13h 55m1 stop

5:45 pm - 2:20 pm

ICN

SEA

12h 35m1 stop

$665Air Canada

Tue, Apr 28 - Fri, May 8

11:05 am - 8:35 pm

SEA

ICN

41h 30m2 stops

9:40 pm - 9:05 am

ICN

SEA

27h 25m2 stops

$680Hainan 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

$702Hainan Airlines

Thu, Mar 5 - Wed, Mar 18

5:00 am - 4:20 am

PSC

ICN

31h 20m2 stops

11:30 am - 12:30 pm

ICN

PSC

17h 00m1 stop

$981United Airlines

Sat, Apr 11 - Thu, Apr 23

5:00 am - 4:20 am

PSC

ICN

31h 20m2 stops

4:50 pm - 9:01 pm

ICN

PSC

44h 11m2 stops

$994United Airlines

Sat, Apr 11 - Thu, Apr 23

7:27 am - 4:30 pm

GEG

ICN

16h 03m1 stop

8:05 pm - 8:56 pm

ICN

GEG

17h 51m1 stop

$994Delta

Fri, Feb 13 - Sun, Feb 22

Air Canada flights from State of Washington to Incheon Intl Airport

Our best Air Canada deals on State of Washington to Incheon Intl Airport flight tickets

Air Canada

Feb 12

SEA5:50 amSeattle/Tacoma Intl

17h 10m

1 stop

ICN4:00 pmIncheon Intl

Feb 25

ICN5:55 pmIncheon Intl

13h 36m

1 stop

SEA2:31 pmSeattle/Tacoma Intl

$622

Find similar

Air Canada

Apr 28

SEA10:10 amSeattle/Tacoma Intl

13h 55m

1 stop

ICN4:05 pmIncheon Intl

May 12

ICN5:45 pmIncheon Intl

16h 45m

1 stop

SEA6:30 pmSeattle/Tacoma Intl

$651

Find similar

Air Canada

Apr 28

SEA10:10 amSeattle/Tacoma Intl

13h 55m

1 stop

ICN4:05 pmIncheon Intl

May 8

ICN5:45 pmIncheon Intl

12h 35m

1 stop

SEA2:20 pmSeattle/Tacoma Intl

$665

Find similar

American Airlines flights from State of Washington to Incheon Intl Airport

Our best American Airlines deals on State of Washington to Incheon Intl Airport flight tickets

American Airlines

Feb 1

PDX11:59 pmPortland

23h 46m

1 stop

ICN4:45 pmIncheon Intl

Feb 4

ICN7:15 pmIncheon Intl

20h 02m

1 stop

PDX10:17 pmPortland

$866

Find similar

American Airlines

Jan 18

PDX6:22 pmPortland

29h 23m

2 stops

ICN4:45 pmIncheon Intl

Jan 23

ICN7:15 pmIncheon Intl

19h 56m

1 stop

PDX10:11 pmPortland

$883

Find similar

American Airlines

Feb 5

PDX6:22 pmPortland

29h 23m

2 stops

ICN4:45 pmIncheon Intl

Feb 12

ICN7:15 pmIncheon Intl

22h 01m

2 stops

PDX12:16 amPortland

$889

Find similar

momondo Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Thu 2/12

5:50 am-4:00 pm

1 stop17h 10m

Incheon Intl

Wed 2/25

5:55 pm-2:31 pm

1 stop13h 36m

$622

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Thu 2/12

9:55 am-10:25 pm

2 stops19h 30m

Incheon Intl

Wed 2/25

5:55 pm-2:31 pm

1 stop13h 36m

$634

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Mon 4/27

10:10 am-10:15 pm

2 stops20h 05m

Incheon Intl

Thu 5/14

10:40 am-2:20 pm

2 stops19h 40m

$646

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Tue 4/28

10:10 am-4:05 pm

1 stop13h 55m

Incheon Intl

Tue 5/12

5:45 pm-6:30 pm

1 stop16h 45m

$651

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Tue 4/28

10:10 am-4:05 pm

1 stop13h 55m

Incheon Intl

Fri 5/8

5:45 pm-2:20 pm

1 stop12h 35m

$665

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

$680

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Thu 3/5

10:05 am-8:35 pm

2 stops41h 30m

Incheon Intl

Wed 3/18

9:40 pm-9:05 am

2 stops27h 25m

$702

PascoIncheon

PSC - ICN

PSCICN

Pasco Tri Cities

Sat 4/11

5:00 am-4:20 am

2 stops31h 20m

Incheon Intl

Thu 4/23

11:30 am-12:30 pm

1 stop17h 00m

$981

PascoIncheon

PSC - ICN

PSCICN

Pasco Tri Cities

Sat 4/11

5:00 am-4:20 am

2 stops31h 20m

Incheon Intl

Thu 4/23

4:50 pm-9:01 pm

2 stops44h 11m

$994

SpokaneIncheon

GEG - ICN

GEGICN

Spokane

Fri 2/13

7:27 am-4:30 pm

1 stop16h 03m

Incheon Intl

Sun 2/22

8:05 pm-8:56 pm

1 stop17h 51m

$994

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 Incheon Intl Airport

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 Incheon Intl Airport?

The cheapest month to fly to Incheon Intl Airport from State of Washington is in April. Flight prices, which tend to average around $338, are often lower during this time because this is during the off-season. If you are unable to visit Incheon Intl Airport during the month of April, then departing from State of Washington during the month August is also very affordable. Most momondo users find prices during this month for around $338.

What is the cheapest day to depart on your flight to Incheon Intl Airport?

The cheapest day to depart from State of Washington to Incheon Intl Airport is on a Wednesday when prices can be found for as low as $718. If your travel schedule is flexible, try to avoid departing on a Friday because tickets tend to average around $960. These prices are subject to change though, so be sure to set up a Price Alert for flights to Incheon Intl Airport.

What is the cheapest time of day to depart on your flight to Incheon Intl Airport?

In the evening is the cheapest time of day to fly from State of Washington to Incheon Intl Airport when you can find flight prices for as low as $711. Flying to Incheon Intl Airport in the evening is an ideal time because this is during off-peak travel hours. If you have a flexible travel schedule, then try to avoid flying in the afternoon when prices are $1,401 on average. Flights to Incheon Intl Airport 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 Incheon Intl flight route?

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

How far in advance should I book a flight to Incheon Intl Airport?

You are more likely to see cheaper flights to Incheon Intl Airport from State of Washington when booking weeks ahead of your departure date. In general, you can expect to find flights to Incheon Intl Airport for around $947 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Incheon Intl Airport from State of Washington for as low as $593 on momondo.

What cabin class options are available on Washington to Incheon Intl flights?

There are 3 cabin classes available to choose from on Washington to Incheon Intl 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 Incheon Intl Airport flights?

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

Cheap State of Washington to Incheon Intl Airport flight deals and tips

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

Best Price Found	$366
Fastest flight time	11h 20m
Direct flights	Every day

The best one-way flight to Incheon Intl Airport from State of Washington in the past 72 hours is $366. The best round-trip flight deal from State of Washington to Incheon Intl Airport found on momondo in the last 72 hours is $337.

The fastest flight from State of Washington to Incheon Intl Airport takes 11h 20m

Direct flights go from State of Washington to Incheon Intl Airport every day.

Search flight deals

When did momondo last update prices for flights from Washington to Incheon Intl Airport?
Prices for flights from Washington to Incheon Intl Airport are updated daily.
How many operators does momondo search for flights from Washington to Incheon Intl Airport?
As of December 2025, there are 10 operators available to choose from for flights from Washington to Incheon Intl Airport.
How old do you have to be to fly from Washington to Incheon Intl Airport?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Washington to Incheon Intl Airport.
What documentation or ID do you need to fly to Incheon Intl Airport?
The travel and health documents you'll need for your trip to Incheon Intl Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Incheon Intl Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.
What is the most popular plane model from State of Washington to Incheon Intl Airport?
momondo data reveals that the most frequently booked plane model on the route from State of Washington to Incheon Intl Airport is Boeing 787-10 Dreamliner, representing 38.89% of all bookings. The subsequent popular models are Airbus A350-900 at 20.53%, Boeing 777-200/200ER at 13.08%, and Boeing 787-9 Dreamliner at 12.79%.

Best airlines flying from State of Washington to Incheon Intl Airport

Compare and see reviews for airlines that fly from State of Washington to Incheon Intl Airport with momondo

Airline	Rating	Free Cancellation	Price
Delta	PriceFrom $179	Free Cancellation	Rating 7.9 8,015 reviews	Search Delta flights
United Airlines	PriceFrom $282	Free Cancellation	Rating 7.4 9,107 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 11,517 reviews	Search Alaska Airlines flights
Air Canada	PriceFrom $611	Free Cancellation	Rating 7.1 10,551 reviews	Search Air Canada flights
Asiana Airlines	PriceFrom $797	Free Cancellation	Rating 8.2 499 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 8.3 792 reviews	Search China Airlines flights
EVA Air	PriceFrom $978	Free Cancellation	Rating 8.4 1,298 reviews	Search EVA Air flights
Turkish Airlines	PriceFrom $995	Free Cancellation	Rating 7.3 4,112 reviews	Search Turkish Airlines flights

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

Finding the right flight to Seoul 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 Seoul quick and easy, saving you time and money.

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

Yes. momondo allows you to filter the results for Washington to Seoul flights to just show those with flexible booking policies.

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

momondo helps you find the best flight between Washington and Seoul by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

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

If you are not ready to book a flight from Washington to Seoul now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Seoul and let you know when they change.

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Cheap flights from Washington to Seoul from $344

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 3/19. 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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Air Canada flights from State of Washington to Incheon Intl Airport

Our best Air Canada deals on State of Washington to Incheon Intl Airport flight tickets

American Airlines flights from State of Washington to Incheon Intl Airport

Our best American Airlines deals on State of Washington to Incheon Intl Airport flight tickets

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How to get the cheapest flight ticket from State of Washington to Incheon Intl Airport

What is the cheapest month to fly to Incheon Intl Airport?

What is the cheapest day to depart on your flight to Incheon Intl Airport?

What is the cheapest time of day to depart on your flight to Incheon Intl Airport?

What is the cheapest Washington to Incheon Intl flight route?

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

How far in advance should I book a flight to Incheon Intl Airport?

What cabin class options are available on Washington to Incheon Intl flights?

There are 3 cabin classes available to choose from on Washington to Incheon Intl 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 Incheon Intl Airport flights?

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

What is the cheapest airline that flies from Washington to Incheon Intl?

Asiana Airlines, Korean Air, and Delta are the most popular carriers operating from Washington to Incheon Intl

What airlines fly to Incheon Intl Airport?

How many flights depart from State of Washington to Incheon Intl Airport on average per day?

As of December 2025, there are 6 flights per day flying from State of Washington to Incheon Intl Airport. The most common time of day flights depart is 11:00AM, with 51% of flights taking off at noon.

How many flights depart from State of Washington to Incheon Intl Airport on average per week?

The number of flights available between State of Washington and Incheon Intl Airport is 47 per week as of December 2025. The most frequent departure day is Mon, with 17% of weekly flights leaving on this day.

How long does it take to fly to Incheon Intl Airport?

Cheap State of Washington to Incheon Intl Airport flight deals and tips

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

Best Price Found

Fastest flight time

Direct flights

When did momondo last update prices for flights from Washington to Incheon Intl Airport?

How many operators does momondo search for flights from Washington to Incheon Intl Airport?

How old do you have to be to fly from Washington to Incheon Intl Airport?

What documentation or ID do you need to fly to Incheon Intl Airport?

What is the most popular plane model from State of Washington to Incheon Intl Airport?

Best airlines flying from State of Washington to Incheon Intl Airport

Compare and see reviews for airlines that fly from State of Washington to Incheon Intl Airport with momondo

Traveling to a place near Seoul?

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 Incheon Intl Airport 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 Seoul

Popular cities in South Korea

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