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Cheap flights from Washington to Seoul from $437

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 3/2. 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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0 bags

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Cheap round-trip flights

Enter your travel dates to find the best prices.
Japan Airlines Logo
12:30 pm - 10:05 pm
SEA
-
GMP
16h 35m1 stop
Japan Airlines Logo
7:40 pm - 9:55 am
GMP
-
SEA
31h 15m1 stop
$896Japan Airlines
Mon, Jan 12 - Mon, Jan 19
Japan Airlines Logo
8:25 am - 10:05 pm
SEA
-
GMP
20h 40m2 stops
Japan Airlines Logo
7:40 pm - 9:55 am
GMP
-
SEA
31h 15m1 stop
$898Japan Airlines
Wed, Jan 14 - Wed, Jan 21
Japan Airlines Logo
12:30 pm - 10:05 pm
SEA
-
GMP
16h 35m1 stop
Japan Airlines Logo
7:40 pm - 4:47 pm
GMP
-
SEA
38h 07m2 stops
$902Japan Airlines
Mon, Jan 12 - Mon, Jan 19
Japan Airlines Logo
8:25 am - 10:05 pm
SEA
-
GMP
20h 40m2 stops
Japan Airlines Logo
12:05 pm - 4:04 pm
GMP
-
SEA
20h 59m2 stops
$903Japan Airlines
Tue, Feb 3 - Tue, Feb 17
EVA Air Logo
1:30 am - 6:10 pm
SEA
-
GMP
24h 40m1 stop
EVA Air Logo
1:50 pm - 7:30 pm
GMP
-
SEA
21h 40m1 stop
$904EVA Air
Sun, Apr 26 - Sat, May 9
Japan Airlines Logo
1:30 pm - 9:50 pm
SEA
-
GMP
16h 20m1 stop
Japan Airlines Logo
12:05 pm - 10:25 am
GMP
-
SEA
14h 20m1 stop
$905Japan Airlines
Wed, Apr 22 - Thu, May 14
Japan Airlines Logo
11:43 am - 10:05 pm
SEA
-
GMP
41h 22m2 stops
Japan Airlines Logo
12:05 pm - 4:47 pm
GMP
-
SEA
21h 42m2 stops
$907Japan Airlines
Tue, Jan 13 - Tue, Jan 20
Japan Airlines Logo
11:43 am - 10:05 pm
SEA
-
GMP
41h 22m2 stops
Japan Airlines Logo
12:05 pm - 4:47 pm
GMP
-
SEA
21h 42m2 stops
$910Japan Airlines
Mon, Jan 26 - Tue, Feb 3
Japan Airlines Logo
12:30 pm - 10:05 pm
SEA
-
GMP
16h 35m1 stop
Japan Airlines Logo
7:40 pm - 9:55 am
GMP
-
SEA
31h 15m1 stop
$916Japan Airlines
Mon, Jan 26 - Wed, Jan 28
Multiple Airlines Logo
6:50 am - 10:05 pm
GEG
-
GMP
22h 15m2 stops
Multiple Airlines Logo
8:00 am - 3:25 pm
GMP
-
GEG
24h 25m2 stops
$961Multiple Airlines
Thu, Jan 29 - Thu, Feb 5

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
Jan 12
SEA12:30 pmSeattle/Tacoma Intl
16h 35m
1 stop
GMP10:05 pmSeoul Gimpo Intl
Jan 19
GMP7:40 pmSeoul Gimpo Intl
31h 15m
1 stop
SEA9:55 amSeattle/Tacoma Intl
$896
Find similar
Japan Airlines
Jan 14
SEA8:25 amSeattle/Tacoma Intl
20h 40m
2 stops
GMP10:05 pmSeoul Gimpo Intl
Jan 21
GMP7:40 pmSeoul Gimpo Intl
31h 15m
1 stop
SEA9:55 amSeattle/Tacoma Intl
$898
Find similar
Japan Airlines
Jan 12
SEA12:30 pmSeattle/Tacoma Intl
16h 35m
1 stop
GMP10:05 pmSeoul Gimpo Intl
Jan 19
GMP7:40 pmSeoul Gimpo Intl
38h 07m
2 stops
SEA4:47 pmSeattle/Tacoma Intl
$902
Find similar

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
Apr 26
SEA1:30 amSeattle/Tacoma Intl
24h 40m
1 stop
GMP6:10 pmSeoul Gimpo Intl
May 9
GMP1:50 pmSeoul Gimpo Intl
21h 40m
1 stop
SEA7:30 pmSeattle/Tacoma Intl
$904
Find similar
EVA Air
Apr 30
SEA1:30 amSeattle/Tacoma Intl
19h 20m
1 stop
GMP12:50 pmSeoul Gimpo Intl
May 9
GMP1:50 pmSeoul Gimpo Intl
21h 00m
1 stop
SEA6:50 pmSeattle/Tacoma Intl
$942
Find similar
EVA Air
Feb 22
SEA12:10 amSeattle/Tacoma Intl
24h 50m
1 stop
GMP6:00 pmSeoul Gimpo Intl
Mar 20
GMP1:50 pmSeoul Gimpo Intl
21h 20m
1 stop
SEA7:10 pmSeattle/Tacoma Intl
$1,035
Find similar

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 December 15, 2025.
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

Mon 1/12

12:30 pm-10:05 pm

1 stop16h 35m

Seoul Gimpo Intl

Mon 1/19

7:40 pm-9:55 am

1 stop31h 15m

$896

SeattleSeoul

SEA - GMP

SEAGMP

Seattle/Tacoma Intl

Wed 1/14

8:25 am-10:05 pm

2 stops20h 40m

Seoul Gimpo Intl

Wed 1/21

7:40 pm-9:55 am

1 stop31h 15m

$898

SeattleSeoul

SEA - GMP

SEAGMP

Seattle/Tacoma Intl

Mon 1/12

12:30 pm-10:05 pm

1 stop16h 35m

Seoul Gimpo Intl

Mon 1/19

7:40 pm-4:47 pm

2 stops38h 07m

$902

SeattleSeoul

SEA - GMP

SEAGMP

Seattle/Tacoma Intl

Tue 2/3

8:25 am-10:05 pm

2 stops20h 40m

Seoul Gimpo Intl

Tue 2/17

12:05 pm-4:04 pm

2 stops20h 59m

$903

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-7:30 pm

1 stop21h 40m

$904

SeattleSeoul

SEA - GMP

SEAGMP

Seattle/Tacoma Intl

Wed 4/22

1:30 pm-9:50 pm

1 stop16h 20m

Seoul Gimpo Intl

Thu 5/14

12:05 pm-10:25 am

1 stop14h 20m

$905

SeattleSeoul

SEA - GMP

SEAGMP

Seattle/Tacoma Intl

Tue 1/13

11:43 am-10:05 pm

2 stops41h 22m

Seoul Gimpo Intl

Tue 1/20

12:05 pm-4:47 pm

2 stops21h 42m

$907

SeattleSeoul

SEA - GMP

SEAGMP

Seattle/Tacoma Intl

Mon 1/26

11:43 am-10:05 pm

2 stops41h 22m

Seoul Gimpo Intl

Tue 2/3

12:05 pm-4:47 pm

2 stops21h 42m

$910

SeattleSeoul

SEA - GMP

SEAGMP

Seattle/Tacoma Intl

Mon 1/26

12:30 pm-10:05 pm

1 stop16h 35m

Seoul Gimpo Intl

Wed 1/28

7:40 pm-9:55 am

1 stop31h 15m

$916

SpokaneSeoul

GEG - GMP

GEGGMP

Spokane

Thu 1/29

6:50 am-10:05 pm

2 stops22h 15m

Seoul Gimpo Intl

Thu 2/5

8:00 am-3:25 pm

2 stops24h 25m

$961

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 day to depart on your flight to Seoul Gimpo Intl Airport?

On average, the least expensive day to fly to Seoul Gimpo Intl Airport from State of Washington is on a Thursday. momondo users have found tickets for Thursday departures for as low as $1,283. However, this price may fluctuate depending on the airline, the season, and holidays. The most expensive day to fly to Seoul Gimpo Intl Airport is Tuesday, with ticket prices averaging around $1,857.

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

According to our data, the cheapest time of day to fly to Seoul Gimpo Intl Airport is in the afternoon. momondo users have found flights departing from State of Washington to Seoul Gimpo Intl Airport in the afternoon for as low as $1,250. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. In contrast, the most expensive time of day to depart to Seoul Gimpo Intl Airport is in the morning when prices are around $1,586.

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.
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  • 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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