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Cheap flights from Washington to Seoul from $365

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 8/30. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Find the cheapest flights from Washington to Seoul

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
2:30 pm - 6:45 pmPDX  Portland-ICN Incheon Intl
36h 15m1 stop Calgary
Multiple Airlines Logo
1:30 pm - 9:25 amICN  Incheon Intl-PDX Portland
35h 55m2 stops Xiamen Gaoqi Intl Los Angeles
$779Multiple Airlines
Wed, Aug 26 - Tue, Sep 8
Multiple Airlines Logo
2:30 pm - 6:45 pmPDX  Portland-ICN Incheon Intl
36h 15m1 stop Calgary
Multiple Airlines Logo
7:35 pm - 8:50 pmICN  Incheon Intl-PDX Portland
17h 15m2 stops Seattle/Tacoma Intl San Francisco
$881Multiple Airlines
Wed, Sep 2 - Sat, Sep 12
Cathay Pacific Logo
11:45 am - 10:25 pmSEA  Seattle/Tacoma Intl-ICN Incheon Intl
18h 40m1 stop Hong Kong Intl
Cathay Pacific Logo
1:55 am - 10:05 amICN  Incheon Intl-SEA Seattle/Tacoma Intl
24h 10m1 stop Hong Kong Intl
$898Cathay Pacific
Wed, Sep 23 - Tue, Sep 29
Cathay Pacific Logo
11:45 am - 10:25 pmSEA  Seattle/Tacoma Intl-ICN Incheon Intl
18h 40m1 stop Hong Kong Intl
Cathay Pacific Logo
8:00 am - 10:05 amICN  Incheon Intl-SEA Seattle/Tacoma Intl
18h 05m1 stop Hong Kong Intl
$900Cathay Pacific
Tue, Sep 22 - Wed, Sep 30
Air Canada Logo
7:05 pm - 4:10 pmSEA  Seattle/Tacoma Intl-ICN Incheon Intl
29h 05m1 stop Vancouver Intl
Air Canada Logo
6:55 pm - 6:22 pmICN  Incheon Intl-SEA Seattle/Tacoma Intl
16h 27m1 stop Vancouver Intl
$935Air Canada
Sun, Oct 25 - Mon, Nov 23
Air Canada Logo
7:05 pm - 5:10 pmSEA  Seattle/Tacoma Intl-ICN Incheon Intl
29h 05m1 stop Vancouver Intl
Air Canada Logo
6:55 pm - 2:37 pmICN  Incheon Intl-SEA Seattle/Tacoma Intl
12h 42m1 stop Vancouver Intl
$935Air Canada
Sat, Nov 28 - Sat, Dec 5
Asiana Airlines Logo
12:10 am - 4:30 amSEA  Seattle/Tacoma Intl-ICN Incheon Intl
12h 20mnonstop
Asiana Airlines Logo
9:20 pm - 3:15 pmICN  Incheon Intl-SEA Seattle/Tacoma Intl
9h 55mnonstop
$988Asiana Airlines
Thu, Sep 17 - Thu, Oct 1
Asiana Airlines Logo
12:10 am - 4:30 amSEA  Seattle/Tacoma Intl-ICN Incheon Intl
12h 20mnonstop
Asiana Airlines Logo
9:20 pm - 3:15 pmICN  Incheon Intl-SEA Seattle/Tacoma Intl
9h 55mnonstop
$995Asiana Airlines
Thu, Sep 17 - Thu, Oct 1
United Airlines Logo
7:00 am - 3:00 pmPDX  Portland-ICN Incheon Intl
16h 00m1 stop San Francisco
United Airlines Logo
11:30 am - 10:15 amICN  Incheon Intl-PDX Portland
14h 45m1 stop San Francisco
$1,107United Airlines
Mon, Oct 5 - Tue, Oct 13
United Airlines Logo
5:30 am - 3:00 pmPDX  Portland-ICN Incheon Intl
17h 30m1 stop San Francisco
United Airlines Logo
11:30 am - 6:25 pmICN  Incheon Intl-PDX Portland
22h 55m1 stop San Francisco
$1,107United Airlines
Wed, Sep 16 - Wed, Sep 23

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Delta flights from State of Washington to Incheon Intl Airport

Our best Delta deals on State of Washington to Incheon Intl Airport flight tickets
Delta
Sep 17
PSC5:25 amPasco Tri Cities
19h 25m
1 stop
ICN4:50 pmIncheon Intl
Sep 24
ICN7:00 pmIncheon Intl
20h 54m
1 stop
PSC11:54 pmPasco Tri Cities
$1,107
Delta
Nov 6
PSC5:20 amPasco Tri Cities
19h 35m
1 stop
ICN5:55 pmIncheon Intl
Nov 17
ICN6:45 pmIncheon Intl
12h 58m
1 stop
PSC2:43 pmPasco Tri Cities
$1,157
Delta
Aug 17
PDX9:29 amPortland
15h 21m
1 stop
ICN4:50 pmIncheon Intl
Aug 26
ICN7:00 pmIncheon Intl
14h 14m
1 stop
PDX5:14 pmPortland
$1,897

Qatar Airways flights from State of Washington to Incheon Intl Airport

Our best Qatar Airways deals on State of Washington to Incheon Intl Airport flight tickets
Qatar Airways
Nov 6
PSC5:29 pmPasco Tri Cities
54h 46m
2 stops
ICN5:15 pmIncheon Intl
Nov 16
ICN12:20 amIncheon Intl
33h 32m
2 stops
PSC4:52 pmPasco Tri Cities
$1,150
Qatar Airways
Nov 6
PSC5:29 pmPasco Tri Cities
54h 46m
2 stops
ICN5:15 pmIncheon Intl
Nov 16
ICN12:20 amIncheon Intl
33h 32m
2 stops
PSC4:52 pmPasco Tri Cities
$1,159

momondo Fare Finder

 
Customize your flight search to find flights from State of Washington to Incheon Intl Airport that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated August 8, 2026.
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

Cheapest round-trip

PortlandIncheon

PDX Portland - ICN Incheon Intl

PDXICN

Portland

Wed 8/26

2:30 pm-6:45 pm

1 stop36h 15m

Incheon Intl

Tue 9/8

1:30 pm-9:25 am

2 stops35h 55m

$779

PortlandIncheon

PDX Portland - ICN Incheon Intl

PDXICN

Portland

Wed 9/2

2:30 pm-6:45 pm

1 stop36h 15m

Incheon Intl

Sat 9/12

7:35 pm-8:50 pm

2 stops17h 15m

$881

SeattleIncheon

SEA Seattle/Tacoma Intl - ICN Incheon Intl

SEAICN

Seattle/Tacoma Intl

Wed 9/23

11:45 am-10:25 pm

1 stop18h 40m

Incheon Intl

Tue 9/29

1:55 am-10:05 am

1 stop24h 10m

$898

SeattleIncheon

SEA Seattle/Tacoma Intl - ICN Incheon Intl

SEAICN

Seattle/Tacoma Intl

Tue 9/22

11:45 am-10:25 pm

1 stop18h 40m

Incheon Intl

Wed 9/30

8:00 am-10:05 am

1 stop18h 05m

$900

SeattleIncheon

SEA Seattle/Tacoma Intl - ICN Incheon Intl

SEAICN

Seattle/Tacoma Intl

Sun 10/25

7:05 pm-4:10 pm

1 stop29h 05m

Incheon Intl

Mon 11/23

6:55 pm-6:22 pm

1 stop16h 27m

$935

SeattleIncheon

SEA Seattle/Tacoma Intl - ICN Incheon Intl

SEAICN

Seattle/Tacoma Intl

Sat 11/28

7:05 pm-5:10 pm

1 stop29h 05m

Incheon Intl

Sat 12/5

6:55 pm-2:37 pm

1 stop12h 42m

$935
Quickest round-trip

SeattleIncheon

SEA Seattle/Tacoma Intl - ICN Incheon Intl

SEAICN

Seattle/Tacoma Intl

Thu 9/17

12:10 am-4:30 am

Nonstop12h 20m

Incheon Intl

Thu 10/1

9:20 pm-3:15 pm

Nonstop9h 55m

$988

SeattleIncheon

SEA Seattle/Tacoma Intl - ICN Incheon Intl

SEAICN

Seattle/Tacoma Intl

Thu 9/17

12:10 am-4:30 am

Nonstop12h 20m

Incheon Intl

Thu 10/1

9:20 pm-3:15 pm

Nonstop9h 55m

$995

PortlandIncheon

PDX Portland - ICN Incheon Intl

PDXICN

Portland

Mon 10/5

7:00 am-3:00 pm

1 stop16h 00m

Incheon Intl

Tue 10/13

11:30 am-10:15 am

1 stop14h 45m

$1,107

PortlandIncheon

PDX Portland - ICN Incheon Intl

PDXICN

Portland

Wed 9/16

5:30 am-3:00 pm

1 stop17h 30m

Incheon Intl

Wed 9/23

11:30 am-6:25 pm

1 stop22h 55m

$1,107

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Seoul from

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

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 August. 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 August, then departing from State of Washington during the month April 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 $661. If your travel schedule is flexible, try to avoid departing on a Friday because tickets tend to average around $869. 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?

At noon 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 $564. Flying to Incheon Intl Airport at noon 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 morning when prices are $869 on average. Flights to Incheon Intl Airport from State of Washington in the morning 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 from Washington 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 $834 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 $545 on momondo.

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

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

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

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

$443

Fastest flight time

11h 20m

Direct flights

Mon, Tue, Wed, Fri, Sat and Sun
The best one-way flight to Incheon Intl Airport from State of Washington in the past 72 hours is $443. The best round-trip flight deal from State of Washington to Incheon Intl Airport found on momondo in the last 72 hours is $856.
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 on Monday, Tuesday, Wednesday, Friday, Saturday and Sunday. The only airline offering direct flights is Korean Air.
Search flight deals

Frequently asked questions about flying from Washington to Incheon Intl Airport

  • 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?

  • 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?

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
Hawaiian AirlinesPriceFrom $160Free CancellationRating
7.8
2,819 reviews
Search Hawaiian Airlines flights
Alaska AirlinesPriceFrom $335Free CancellationRating
7.9
12,780 reviews
Search Alaska Airlines flights
Air CanadaPriceFrom $523Free CancellationRating
7.1
11,449 reviews
Search Air Canada flights
Cathay PacificPriceFrom $762Free CancellationRating
7.6
1,441 reviews
Search Cathay Pacific flights
Asiana AirlinesPriceFrom $783Free CancellationRating
8.1
553 reviews
Search Asiana Airlines flights
DeltaPriceFrom $829Free CancellationRating
7.8
8,505 reviews
Search Delta flights
Korean AirPriceFrom $843Free CancellationRating
8.4
1,222 reviews
Search Korean Air flights

Traveling to a place near Seoul?

Book flights to Seoul if you plan to visit one of these locations
Daejeon
Suwon
Seongnam
Anyang

Why use momondo?

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.

An easier way to manage your Incheon Intl Airport trip

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