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Cheap flights from Washington to Seoul from $583

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 8/26. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Find the cheapest flights from Washington to Seoul

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
1:30 am - 7:15 pm
SEA
-
GMP
25h 45m
1 stop
Multiple Airlines Logo
8:20 pm - 9:40 pm
GMP
-
SEA
41h 20m
2 stops
$1,178Multiple Airlines
Mon, Sep 14 - Wed, Sep 30
EVA Air Logo
1:30 am - 7:15 pm
SEA
-
GMP
25h 45m
1 stop
EVA Air Logo
1:50 pm - 6:40 pm
GMP
-
SEA
20h 50m
1 stop
$1,184EVA Air
Mon, Oct 12 - Sat, Oct 24
Multiple Airlines Logo
7:24 pm - 12:50 pm
SEA
-
GMP
49h 26m
2 stops
Multiple Airlines Logo
8:20 pm - 1:39 pm
GMP
-
SEA
33h 19m
2 stops
$1,194Multiple Airlines
Tue, Sep 15 - Wed, Sep 30
Multiple Airlines Logo
10:10 am - 10:15 pm
SEA
-
GMP
19h 05m
2 stops
Multiple Airlines Logo
8:30 am - 2:37 pm
GMP
-
SEA
23h 07m
2 stops
$1,203Multiple Airlines
Mon, Nov 16 - Thu, Nov 19
Multiple Airlines Logo
1:30 am - 12:50 pm
SEA
-
GMP
19h 20m
1 stop
Multiple Airlines Logo
7:15 pm - 11:22 am
GMP
-
SEA
32h 07m
2 stops
$1,214Multiple Airlines
Thu, Sep 10 - Tue, Sep 15
EVA Air Logo
1:10 am - 12:50 pm
SEA
-
GMP
19h 40m
1 stop
EVA Air Logo
1:50 pm - 7:00 pm
GMP
-
SEA
21h 10m
1 stop
$1,219EVA Air
Thu, Aug 20 - Sat, Sep 5
EVA Air Logo
2:10 am - 6:10 pm
SEA
-
GMP
24h 00m
1 stop
EVA Air Logo
1:50 pm - 7:00 pm
GMP
-
SEA
21h 10m
1 stop
$1,231EVA Air
Sun, Aug 30 - Sat, Sep 12
Japan Airlines Logo
7:03 am - 9:15 pm
SEA
-
GMP
22h 12m
2 stops
Japan Airlines Logo
12:05 pm - 4:56 pm
GMP
-
SEA
20h 51m
2 stops
$1,256Japan Airlines
Thu, Jul 16 - Tue, Apr 20
Japan Airlines Logo
7:03 am - 9:15 pm
PDX
-
GMP
22h 12m
2 stops
Japan Airlines Logo
12:05 pm - 4:50 pm
GMP
-
PDX
20h 45m
2 stops
$1,340Japan Airlines
Wed, Sep 2 - Wed, Sep 30
Japan Airlines Logo
7:15 am - 10:05 pm
PDX
-
GMP
22h 50m
2 stops
Japan Airlines Logo
12:05 pm - 4:34 pm
GMP
-
PDX
21h 29m
2 stops
$1,362Japan Airlines
Mon, Oct 26 - Mon, Nov 9

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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
Aug 20
SEA1:10 amSeattle/Tacoma Intl
19h 40m
1 stop
GMP12:50 pmSeoul Gimpo Intl
Sep 5
GMP1:50 pmSeoul Gimpo Intl
21h 10m
1 stop
SEA7:00 pmSeattle/Tacoma Intl
$1,219
EVA Air
Aug 30
SEA2:10 amSeattle/Tacoma Intl
24h 00m
1 stop
GMP6:10 pmSeoul Gimpo Intl
Sep 12
GMP1:50 pmSeoul Gimpo Intl
21h 10m
1 stop
SEA7:00 pmSeattle/Tacoma Intl
$1,231
EVA Air
Sep 3
SEA1:30 amSeattle/Tacoma Intl
19h 20m
1 stop
GMP12:50 pmSeoul Gimpo Intl
Sep 19
GMP1:50 pmSeoul Gimpo Intl
21h 50m
1 stop
SEA7:40 pmSeattle/Tacoma Intl
$1,271

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
Jul 16
SEA7:03 amSeattle/Tacoma Intl
22h 12m
2 stops
GMP9:15 pmSeoul Gimpo Intl
Apr 20
GMP12:05 pmSeoul Gimpo Intl
20h 51m
2 stops
SEA4:56 pmSeattle/Tacoma Intl
$1,256
Japan Airlines
Jul 31
SEA7:03 amSeattle/Tacoma Intl
22h 12m
2 stops
GMP9:15 pmSeoul Gimpo Intl
Aug 31
GMP7:15 pmSeoul Gimpo Intl
31h 20m
1 stop
SEA10:35 amSeattle/Tacoma Intl
$1,292
Japan Airlines
Jul 14
SEA7:03 amSeattle/Tacoma Intl
22h 12m
2 stops
GMP9:15 pmSeoul Gimpo Intl
Apr 22
GMP8:00 amSeoul Gimpo Intl
24h 56m
2 stops
SEA4:56 pmSeattle/Tacoma Intl
$1,308

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 June 25, 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

Cheapest round-trip

SeattleSeoul

SEA - GMP

SEAGMP

Seattle/Tacoma Intl

Mon 9/14

1:30 am-7:15 pm

1 stop25h 45m

Seoul Gimpo Intl

Wed 9/30

8:20 pm-9:40 pm

2 stops41h 20m

$1,178

SeattleSeoul

SEA - GMP

SEAGMP

Seattle/Tacoma Intl

Mon 10/12

1:30 am-7:15 pm

1 stop25h 45m

Seoul Gimpo Intl

Sat 10/24

1:50 pm-6:40 pm

1 stop20h 50m

$1,184

SeattleSeoul

SEA - GMP

SEAGMP

Seattle/Tacoma Intl

Tue 9/15

7:24 pm-12:50 pm

2 stops49h 26m

Seoul Gimpo Intl

Wed 9/30

8:20 pm-1:39 pm

2 stops33h 19m

$1,194

SeattleSeoul

SEA - GMP

SEAGMP

Seattle/Tacoma Intl

Mon 11/16

10:10 am-10:15 pm

2 stops19h 05m

Seoul Gimpo Intl

Thu 11/19

8:30 am-2:37 pm

2 stops23h 07m

$1,203

SeattleSeoul

SEA - GMP

SEAGMP

Seattle/Tacoma Intl

Thu 9/10

1:30 am-12:50 pm

1 stop19h 20m

Seoul Gimpo Intl

Tue 9/15

7:15 pm-11:22 am

2 stops32h 07m

$1,214
Quickest round-trip

SeattleSeoul

SEA - GMP

SEAGMP

Seattle/Tacoma Intl

Thu 8/20

1:10 am-12:50 pm

1 stop19h 40m

Seoul Gimpo Intl

Sat 9/5

1:50 pm-7:00 pm

1 stop21h 10m

$1,219

SeattleSeoul

SEA - GMP

SEAGMP

Seattle/Tacoma Intl

Sun 8/30

2:10 am-6:10 pm

1 stop24h 00m

Seoul Gimpo Intl

Sat 9/12

1:50 pm-7:00 pm

1 stop21h 10m

$1,231

SeattleSeoul

SEA - GMP

SEAGMP

Seattle/Tacoma Intl

Thu 7/16

7:03 am-9:15 pm

2 stops22h 12m

Seoul Gimpo Intl

Tue 4/20

12:05 pm-4:56 pm

2 stops20h 51m

$1,256

PortlandSeoul

PDX - GMP

PDXGMP

Portland

Wed 9/2

7:03 am-9:15 pm

2 stops22h 12m

Seoul Gimpo Intl

Wed 9/30

12:05 pm-4:50 pm

2 stops20h 45m

$1,340

PortlandSeoul

PDX - GMP

PDXGMP

Portland

Mon 10/26

7:15 am-10:05 pm

2 stops22h 50m

Seoul Gimpo Intl

Mon 11/9

12:05 pm-4:34 pm

2 stops21h 29m

$1,362

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 is the most popular carrier 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

17h 15m

Direct flights

None
The fastest flight from State of Washington to Seoul Gimpo Intl Airport takes 17h 15m
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

Frequently asked questions about flying from Washington to Seoul Gimpo Intl Airport

  • 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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