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Cheap flights from Washington to Seoul from $440

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 4/13. 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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Cheap round-trip flights

Enter your travel dates to find the best prices.
EVA Air Logo
11:30 pm - 12:50 pm
SEA
-
GMP
20h 20m
1 stop
EVA Air Logo
1:50 pm - 7:10 pm
GMP
-
SEA
21h 20m
1 stop
$902EVA Air
Thu, Mar 5 - Sat, Mar 14
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
Japan Airlines Logo
1:15 pm - 10:40 am
SEA
-
GMP
29h 25m
1 stop
Japan Airlines Logo
8:00 am - 10:35 am
GMP
-
SEA
18h 35m
1 stop
$930Japan Airlines
Tue, Apr 21 - Tue, May 12
Japan Airlines Logo
1:15 pm - 10:40 am
SEA
-
GMP
29h 25m
1 stop
Japan Airlines Logo
8:00 am - 4:17 pm
GMP
-
SEA
24h 17m
2 stops
$938Japan Airlines
Tue, Apr 21 - Tue, May 12
EVA Air Logo
12:10 am - 12:50 pm
SEA
-
GMP
19h 40m
1 stop
EVA Air Logo
1:50 pm - 7:10 pm
GMP
-
SEA
21h 20m
1 stop
$940EVA Air
Thu, Mar 5 - Sat, Mar 14
Japan Airlines Logo
5:30 am - 9:15 pm
SEA
-
GMP
23h 45m
2 stops
Japan Airlines Logo
8:00 am - 4:17 pm
GMP
-
SEA
24h 17m
2 stops
$941Japan Airlines
Mon, Apr 13 - Thu, Apr 23
Japan Airlines Logo
8:41 am - 10:40 am
SEA
-
GMP
33h 59m
2 stops
Japan Airlines Logo
12:05 pm - 3:52 pm
GMP
-
SEA
19h 47m
2 stops
$950Japan Airlines
Mon, Apr 6 - Thu, Apr 16
Japan Airlines Logo
1:15 pm - 10:40 am
SEA
-
GMP
29h 25m
1 stop
Japan Airlines Logo
8:00 am - 10:35 am
GMP
-
SEA
18h 35m
1 stop
$955Japan Airlines
Tue, Apr 21 - Tue, May 12
Japan Airlines Logo
12:30 pm - 10:05 pm
SEA
-
GMP
16h 35m
1 stop
Japan Airlines Logo
12:05 pm - 4:04 pm
GMP
-
SEA
19h 59m
2 stops
$959Japan Airlines
Wed, Feb 25 - Mon, Mar 9
Multiple Airlines Logo
9:50 am - 10:25 pm
PDX
-
GMP
20h 35m
2 stops
Multiple Airlines Logo
2:25 pm - 9:30 am
GMP
-
PDX
35h 05m
2 stops
$1,141Multiple Airlines
Mon, Apr 20 - Mon, May 11

Japan Airlines flights from State of Washington to Seoul Gimpo Intl Airport

Our best Japan Airlines deals on State of Washington to Seoul Gimpo Intl Airport flight tickets
Japan Airlines
Apr 21
SEA1:15 pmSeattle/Tacoma Intl
29h 25m
1 stop
GMP10:40 amSeoul Gimpo Intl
May 12
GMP8:00 amSeoul Gimpo Intl
18h 35m
1 stop
SEA10:35 amSeattle/Tacoma Intl
$930
Japan Airlines
Apr 21
SEA1:15 pmSeattle/Tacoma Intl
29h 25m
1 stop
GMP10:40 amSeoul Gimpo Intl
May 12
GMP8:00 amSeoul Gimpo Intl
24h 17m
2 stops
SEA4:17 pmSeattle/Tacoma Intl
$938
Japan Airlines
Apr 21
SEA1:15 pmSeattle/Tacoma Intl
29h 25m
1 stop
GMP10:40 amSeoul Gimpo Intl
May 12
GMP8:00 amSeoul Gimpo Intl
18h 35m
1 stop
SEA10:35 amSeattle/Tacoma Intl
$955

EVA Air flights from State of Washington to Seoul Gimpo Intl Airport

Our best EVA Air deals on State of Washington to Seoul Gimpo Intl Airport flight tickets
EVA Air
May 3
SEA1:50 amSeattle/Tacoma Intl
24h 20m
1 stop
GMP6:10 pmSeoul Gimpo Intl
May 16
GMP1:50 pmSeoul Gimpo Intl
21h 00m
1 stop
SEA6:50 pmSeattle/Tacoma Intl
$902
EVA Air
Apr 26
SEA1:30 amSeattle/Tacoma Intl
24h 40m
1 stop
GMP6:10 pmSeoul Gimpo Intl
May 9
GMP1:50 pmSeoul Gimpo Intl
21h 00m
1 stop
SEA6:50 pmSeattle/Tacoma Intl
$906
EVA Air
Mar 16
SEA1:10 amSeattle/Tacoma Intl
26h 05m
1 stop
GMP7:15 pmSeoul Gimpo Intl
Apr 17
GMP1:50 pmSeoul Gimpo Intl
21h 40m
1 stop
SEA7:30 pmSeattle/Tacoma Intl
$982

momondo Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

SeattleSeoul

SEA - GMP

SEAGMP

Seattle/Tacoma Intl

Thu 3/5

11:30 pm-12:50 pm

1 stop20h 20m

Seoul Gimpo Intl

Sat 3/14

1:50 pm-7:10 pm

1 stop21h 20m

$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

SeattleSeoul

SEA - GMP

SEAGMP

Seattle/Tacoma Intl

Tue 4/21

1:15 pm-10:40 am

1 stop29h 25m

Seoul Gimpo Intl

Tue 5/12

8:00 am-10:35 am

1 stop18h 35m

$930

SeattleSeoul

SEA - GMP

SEAGMP

Seattle/Tacoma Intl

Tue 4/21

1:15 pm-10:40 am

1 stop29h 25m

Seoul Gimpo Intl

Tue 5/12

8:00 am-4:17 pm

2 stops24h 17m

$938

SeattleSeoul

SEA - GMP

SEAGMP

Seattle/Tacoma Intl

Thu 3/5

12:10 am-12:50 pm

1 stop19h 40m

Seoul Gimpo Intl

Sat 3/14

1:50 pm-7:10 pm

1 stop21h 20m

$940

SeattleSeoul

SEA - GMP

SEAGMP

Seattle/Tacoma Intl

Mon 4/13

5:30 am-9:15 pm

2 stops23h 45m

Seoul Gimpo Intl

Thu 4/23

8:00 am-4:17 pm

2 stops24h 17m

$941

SeattleSeoul

SEA - GMP

SEAGMP

Seattle/Tacoma Intl

Mon 4/6

8:41 am-10:40 am

2 stops33h 59m

Seoul Gimpo Intl

Thu 4/16

12:05 pm-3:52 pm

2 stops19h 47m

$950

SeattleSeoul

SEA - GMP

SEAGMP

Seattle/Tacoma Intl

Tue 4/21

1:15 pm-10:40 am

1 stop29h 25m

Seoul Gimpo Intl

Tue 5/12

8:00 am-10:35 am

1 stop18h 35m

$955

SeattleSeoul

SEA - GMP

SEAGMP

Seattle/Tacoma Intl

Wed 2/25

12:30 pm-10:05 pm

1 stop16h 35m

Seoul Gimpo Intl

Mon 3/9

12:05 pm-4:04 pm

2 stops19h 59m

$959

PortlandSeoul

PDX - GMP

PDXGMP

Portland

Mon 4/20

9:50 am-10:25 pm

2 stops20h 35m

Seoul Gimpo Intl

Mon 5/11

2:25 pm-9:30 am

2 stops35h 05m

$1,141

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 Seoul Gimpo 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 airline that flies from Washington to Seoul Gimpo Intl?

EVA Air and Japan Airlines are the most popular carriers operating from Washington to Seoul Gimpo Intl

Cheap State of Washington to Seoul Gimpo Intl Airport flight deals and tips

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

Fastest flight time

16h 35m

Direct flights

None
The fastest flight from State of Washington to Seoul Gimpo Intl Airport takes 16h 35m
There are no direct flights from State of Washington to Seoul Gimpo Intl Airport. There are no popular flight routes from State of Washington to Seoul Gimpo Intl Airport.
Search flight deals

  • When did momondo last update prices for flights from Washington to Seoul Gimpo Intl Airport?

    Prices for flights from Washington to Seoul Gimpo Intl Airport were last updated today.

  • How old do you have to be to fly from Washington to Seoul Gimpo Intl Airport?

    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 Seoul Gimpo Intl Airport.

  • What documentation or ID do you need to fly to Seoul Gimpo Intl Airport?

    The necessary travel and health documents for your Seoul Gimpo Intl Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

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?

momondo does allow users to show only those flights to Seoul from Washington which offer a flexible booking policy as well as other useful filters and features.

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

Once you have performed a search for Washington to Seoul flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

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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