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Cheap flights from Washington to South Korea from $343

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 South Korea 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.
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Find the cheapest flights from Washington to South Korea

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
9:50 am - 4:05 pm
PDX
-
ICN
14h 15m
1 stop
Multiple Airlines Logo
8:40 pm - 7:05 pm
ICN
-
PDX
38h 25m
2 stops
$651Multiple Airlines
Mon, Apr 20 - Tue, May 5
Multiple Airlines Logo
9:50 am - 4:05 pm
PDX
-
ICN
14h 15m
1 stop
Multiple Airlines Logo
8:40 pm - 9:30 am
ICN
-
PDX
28h 50m
2 stops
$656Multiple Airlines
Thu, Apr 30 - Thu, May 28
Hainan Airlines Logo
11:05 am - 8:35 pm
SEA
-
ICN
41h 30m
2 stops
Hainan Airlines Logo
9:40 pm - 9:05 am
ICN
-
SEA
27h 25m
2 stops
$664Hainan Airlines
Thu, Mar 12 - Wed, Mar 25
Hainan Airlines Logo
11:05 am - 8:35 pm
SEA
-
ICN
41h 30m
2 stops
Hainan Airlines Logo
9:40 pm - 9:05 am
ICN
-
SEA
27h 25m
2 stops
$674Hainan Airlines
Thu, Mar 12 - Wed, Mar 25
Cathay Pacific Logo
11:45 am - 12:25 am
SEA
-
ICN
20h 40m
1 stop
Cathay Pacific Logo
1:40 pm - 10:05 am
ICN
-
SEA
36h 25m
1 stop
$690Cathay Pacific
Mon, Apr 13 - Sun, Apr 19
Cathay Pacific Logo
11:45 am - 12:25 am
SEA
-
ICN
20h 40m
1 stop
Cathay Pacific Logo
1:40 pm - 10:05 am
ICN
-
SEA
36h 25m
1 stop
$692Cathay Pacific
Wed, Apr 15 - Sun, Apr 19
United Airlines Logo
3:05 pm - 4:15 pm
PSC
-
ICN
32h 10m
1 stop
United Airlines Logo
12:45 pm - 11:36 am
ICN
-
PSC
15h 51m
1 stop
$834United Airlines
Sun, Feb 15 - Thu, Feb 19
United Airlines Logo
3:05 pm - 4:15 pm
PSC
-
ICN
32h 10m
1 stop
United Airlines Logo
12:45 pm - 8:50 pm
ICN
-
PSC
25h 05m
2 stops
$838United Airlines
Sun, Feb 15 - Thu, Feb 19
EVA Air Logo
1:50 am - 6:10 pm
SEA
-
GMP
24h 20m
1 stop
EVA Air Logo
1:50 pm - 6:50 pm
GMP
-
SEA
21h 00m
1 stop
$902EVA Air
Sun, May 3 - Sat, May 16
EVA Air Logo
1:30 am - 6:10 pm
SEA
-
GMP
24h 40m
1 stop
EVA Air Logo
1:50 pm - 6:50 pm
GMP
-
SEA
21h 00m
1 stop
$906EVA Air
Sun, Apr 26 - Sat, May 9

United Airlines flights from State of Washington to South Korea

Our best United Airlines deals on State of Washington to South Korea flight tickets
United Airlines
Feb 15
PSC3:05 pmPasco Tri Cities
32h 10m
1 stop
ICN4:15 pmIncheon Intl
Feb 19
ICN12:45 pmIncheon Intl
15h 51m
1 stop
PSC11:36 amPasco Tri Cities
$834
United Airlines
Feb 15
PSC3:05 pmPasco Tri Cities
32h 10m
1 stop
ICN4:15 pmIncheon Intl
Feb 19
ICN12:45 pmIncheon Intl
25h 05m
2 stops
PSC8:50 pmPasco Tri Cities
$838
United Airlines
Feb 18
PDX3:50 pmPortland
20h 50m
1 stop
ICN5:40 amIncheon Intl
Feb 25
ICN12:45 pmIncheon Intl
27h 29m
2 stops
PDX11:14 pmPortland
$841

Air Canada flights from State of Washington to South Korea

Our best Air Canada deals on State of Washington to South Korea flight tickets
Air Canada
Feb 12
SEA5:45 amSeattle/Tacoma Intl
17h 15m
1 stop
ICN4:00 pmIncheon Intl
Feb 17
ICN6:55 pmIncheon Intl
17h 21m
1 stop
SEA7:16 pmSeattle/Tacoma Intl
$731
Air Canada
Apr 6
SEA3:40 pmSeattle/Tacoma Intl
32h 25m
1 stop
ICN4:05 pmIncheon Intl
Nov 30
ICN6:55 pmIncheon Intl
31h 56m
1 stop
SEA9:51 amSeattle/Tacoma Intl
$733
Air Canada
Apr 8
SEA8:00 pmSeattle/Tacoma Intl
28h 05m
1 stop
ICN4:05 pmIncheon Intl
Apr 20
ICN5:45 pmIncheon Intl
21h 05m
1 stop
SEA10:50 pmSeattle/Tacoma Intl
$739

momondo Fare Finder

 
Customize your flight search to find flights from State of Washington to South Korea 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 February 8, 2026.
Use the filters below to find and compare flights from Washington to South Korea that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

PortlandIncheon

PDX - ICN

PDXICN

Portland

Mon 4/20

9:50 am-4:05 pm

1 stop14h 15m

Incheon Intl

Tue 5/5

8:40 pm-7:05 pm

2 stops38h 25m

$651

PortlandIncheon

PDX - ICN

PDXICN

Portland

Thu 4/30

9:50 am-4:05 pm

1 stop14h 15m

Incheon Intl

Thu 5/28

8:40 pm-9:30 am

2 stops28h 50m

$656

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Thu 3/12

11:05 am-8:35 pm

2 stops41h 30m

Incheon Intl

Wed 3/25

9:40 pm-9:05 am

2 stops27h 25m

$664

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Thu 3/12

11:05 am-8:35 pm

2 stops41h 30m

Incheon Intl

Wed 3/25

9:40 pm-9:05 am

2 stops27h 25m

$674

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Mon 4/13

11:45 am-12:25 am

1 stop20h 40m

Incheon Intl

Sun 4/19

1:40 pm-10:05 am

1 stop36h 25m

$690

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

Wed 4/15

11:45 am-12:25 am

1 stop20h 40m

Incheon Intl

Sun 4/19

1:40 pm-10:05 am

1 stop36h 25m

$692

PascoIncheon

PSC - ICN

PSCICN

Pasco Tri Cities

Sun 2/15

3:05 pm-4:15 pm

1 stop32h 10m

Incheon Intl

Thu 2/19

12:45 pm-11:36 am

1 stop15h 51m

$834

PascoIncheon

PSC - ICN

PSCICN

Pasco Tri Cities

Sun 2/15

3:05 pm-4:15 pm

1 stop32h 10m

Incheon Intl

Thu 2/19

12:45 pm-8:50 pm

2 stops25h 05m

$838

SeattleSeoul

SEA - GMP

SEAGMP

Seattle/Tacoma Intl

Sun 5/3

1:50 am-6:10 pm

1 stop24h 20m

Seoul Gimpo Intl

Sat 5/16

1:50 pm-6:50 pm

1 stop21h 00m

$902

SeattleSeoul

SEA - GMP

SEAGMP

Seattle/Tacoma Intl

Sun 4/26

1:30 am-6:10 pm

1 stop24h 40m

Seoul Gimpo Intl

Sat 5/9

1:50 pm-6:50 pm

1 stop21h 00m

$906

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 South Korea from

How to get the cheapest flight ticket from State of Washington to South Korea

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 South Korea?

If you aren’t able to travel to South Korea during the month of November, then flying in January is also cheap. Prices for this month can be found on momondo for an average of $870.

What is the cheapest day to depart on your flight to South Korea?

On average, the least expensive day to fly to South Korea from State of Washington is on a Wednesday. momondo users have found tickets for Wednesday departures for as low as $692. However, this price may fluctuate depending on the airline, the season, and holidays. When flying out on a Friday, the most expensive travel day of the week, you can expect to see flight prices from State of Washington to South Korea for around $939.

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

Flying to South Korea from State of Washington in the evening is the least expensive time of day to depart. momondo users have found prices as low as $712 when looking at flights departing in the evening. If you have a flexible travel schedule, then try to avoid flying in the afternoon when prices are $1,401 on average. Flights to South Korea 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 South Korea flight route?

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

How far in advance should I book a flight to South Korea?

You are more likely to see cheaper flights to South Korea from State of Washington when booking weeks ahead of your departure date. In general, you can expect to find flights to South Korea for around $892 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to South Korea from State of Washington for as low as $593 on momondo.

What cabin class options are available on Washington to South Korea flights?

There are 3 cabin classes available to choose from on Washington to South Korea 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 South Korea flights?

No. A direct flight is the cheapest option for a flight between State of Washington to South Korea.

Cheap State of Washington to South Korea flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from State of Washington to South Korea

Best Price Found

$358

Fastest flight time

11h 20m

Direct flights

Every day

Airports in South Korea

24 airports
The best one-way flight to South Korea from State of Washington in the past 72 hours is $358. The best round-trip flight deal from State of Washington to South Korea found on momondo in the last 72 hours is $675.
The fastest flight from State of Washington to South Korea takes 11h 20m
Direct flights go from State of Washington to South Korea every day.
There are 24 airports in South Korea. 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 South Korea?

    Prices for flights from Washington to South Korea were last updated today.

  • How many operators does momondo search for flights from Washington to South Korea?

  • How old do you have to be to fly from Washington to South Korea?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Washington to South Korea.

  • What documentation or ID do you need to fly to South Korea?

    The required travel and health documents for your South Korea 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 South Korea. 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 South Korea?

Best airlines flying from State of Washington to South Korea

Compare and see reviews for airlines that fly from State of Washington to South Korea with momondo
Airline
Rating
Free Cancellation
Price
DeltaPriceFrom $212Free CancellationRating
7.9
8,173 reviews
Search Delta flights
United AirlinesPriceFrom $282Free CancellationRating
7.4
9,256 reviews
Search United Airlines flights
Hawaiian AirlinesPriceFrom $282Free CancellationRating
7.8
2,829 reviews
Search Hawaiian Airlines flights
Alaska AirlinesPriceFrom $335Free CancellationRating
8.0
11,855 reviews
Search Alaska Airlines flights
Air CanadaPriceFrom $531Free CancellationRating
7.1
10,698 reviews
Search Air Canada flights
Asiana AirlinesPriceFrom $710Free CancellationRating
8.1
505 reviews
Search Asiana Airlines flights
China AirlinesPriceFrom $835Free CancellationRating
8.3
803 reviews
Search China Airlines flights
Korean AirPriceFrom $843Free CancellationRating
8.4
1,189 reviews
Search Korean Air flights
EVA AirPriceFrom $978Free CancellationRating
8.4
1,347 reviews
Search EVA Air flights
Turkish AirlinesPriceFrom $995Free CancellationRating
7.3
4,207 reviews
Search Turkish Airlines flights

Why use momondo?

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

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

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

All flight searches from Washington to South Korea on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from Washington to South Korea?

momondo provides multiple filters to help you find the best flight to South Korea 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 South Korea right now. Can momondo alert me if prices change?

Yes. momondo can track prices for Washington to South Korea 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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