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Cheap flights from Washington to Seoul from $542

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 9/10. 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
8:40 am - 10:15 pmSEA  Seattle/Tacoma Intl-GMP Seoul Gimpo Intl
20h 35m2 stops Vancouver Intl Osaka Kansai Intl
Multiple Airlines Logo
1:40 pm - 2:37 pmGMP  Seoul Gimpo Intl-SEA Seattle/Tacoma Intl
17h 57m2 stops Osaka Kansai Intl Vancouver Intl
$1,002Multiple Airlines
Sun, Nov 15 - Tue, Nov 24
EVA Air Logo
1:30 am - 6:10 pmSEA  Seattle/Tacoma Intl-GMP Seoul Gimpo Intl
24h 40m1 stop Taipei City Taiwan Taoyuan Intl
EVA Air Logo
1:50 pm - 6:40 pmGMP  Seoul Gimpo Intl-SEA Seattle/Tacoma Intl
20h 50m1 stop Taipei City Sung Shan
$1,035EVA Air
Sun, Sep 27 - Sat, Oct 17
EVA Air Logo
1:30 am - 6:10 pmSEA  Seattle/Tacoma Intl-GMP Seoul Gimpo Intl
24h 40m1 stop Taipei City Taiwan Taoyuan Intl
EVA Air Logo
1:50 pm - 6:40 pmGMP  Seoul Gimpo Intl-SEA Seattle/Tacoma Intl
20h 50m1 stop Taipei City Sung Shan
$1,035EVA Air
Sun, Sep 27 - Sat, Oct 10
EVA Air Logo
1:30 am - 6:10 pmSEA  Seattle/Tacoma Intl-GMP Seoul Gimpo Intl
24h 40m1 stop Taipei City Taiwan Taoyuan Intl
EVA Air Logo
1:50 pm - 7:40 pmGMP  Seoul Gimpo Intl-SEA Seattle/Tacoma Intl
21h 50m1 stop Taipei City Sung Shan
$1,035EVA Air
Sun, Sep 13 - Sat, Sep 19
EVA Air Logo
1:30 am - 12:50 pmSEA  Seattle/Tacoma Intl-GMP Seoul Gimpo Intl
19h 20m1 stop Taipei City Taiwan Taoyuan Intl
EVA Air Logo
1:50 pm - 6:40 pmGMP  Seoul Gimpo Intl-SEA Seattle/Tacoma Intl
20h 50m1 stop Taipei City Sung Shan
$1,047EVA Air
Wed, Oct 14 - Sat, Oct 24
EVA Air Logo
11:30 pm - 12:50 pmSEA  Seattle/Tacoma Intl-GMP Seoul Gimpo Intl
20h 20m1 stop Taipei City Taiwan Taoyuan Intl
EVA Air Logo
1:50 pm - 6:10 pmGMP  Seoul Gimpo Intl-SEA Seattle/Tacoma Intl
21h 20m1 stop Taipei City Sung Shan
$1,047EVA Air
Thu, Jan 7 - Fri, Jan 29
EVA Air Logo
1:30 am - 12:50 pmSEA  Seattle/Tacoma Intl-GMP Seoul Gimpo Intl
19h 20m1 stop Taipei City Taiwan Taoyuan Intl
EVA Air Logo
1:50 pm - 7:20 pmGMP  Seoul Gimpo Intl-SEA Seattle/Tacoma Intl
21h 30m1 stop Taipei City Sung Shan
$1,047EVA Air
Wed, Oct 14 - Fri, Oct 23
EVA Air Logo
1:30 am - 6:10 pmSEA  Seattle/Tacoma Intl-GMP Seoul Gimpo Intl
24h 40m1 stop Taipei City Taiwan Taoyuan Intl
EVA Air Logo
1:50 pm - 7:10 pmGMP  Seoul Gimpo Intl-SEA Seattle/Tacoma Intl
21h 20m1 stop Taipei City Sung Shan
$1,050EVA Air
Sun, Oct 18 - Fri, Oct 30
Japan Airlines Logo
9:56 am - 10:05 pmSEA  Seattle/Tacoma Intl-GMP Seoul Gimpo Intl
20h 09m2 stops Vancouver Intl Tokyo Narita
Japan Airlines Logo
8:00 am - 9:50 amGMP  Seoul Gimpo Intl-SEA Seattle/Tacoma Intl
18h 50m1 stop Tokyo Haneda
$1,107Japan Airlines
Mon, Oct 26 - Mon, Nov 16
Japan Airlines Logo
11:55 am - 10:05 pmSEA  Seattle/Tacoma Intl-GMP Seoul Gimpo Intl
17h 10m1 stop Tokyo Narita
Japan Airlines Logo
12:05 pm - 9:55 amGMP  Seoul Gimpo Intl-SEA Seattle/Tacoma Intl
14h 50m1 stop Tokyo Haneda
$1,111Japan Airlines
Thu, Jan 7 - Thu, Jan 28

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ANA flights from State of Washington to Seoul Gimpo Intl Airport

Our best ANA deals on State of Washington to Seoul Gimpo Intl Airport flight tickets
ANA
Aug 17
SEA4:30 pmSeattle/Tacoma Intl
34h 05m
1 stop
GMP6:35 pmSeoul Gimpo Intl
Aug 24
GMP7:40 amSeoul Gimpo Intl
26h 52m
2 stops
SEA6:32 pmSeattle/Tacoma Intl
$1,608
ANA
Aug 17
SEA5:20 pmSeattle/Tacoma Intl
33h 15m
2 stops
GMP6:35 pmSeoul Gimpo Intl
Aug 25
GMP12:40 pmSeoul Gimpo Intl
17h 45m
1 stop
SEA2:25 pmSeattle/Tacoma Intl
$1,713
ANA
Aug 13
SEA4:30 pmSeattle/Tacoma Intl
34h 05m
1 stop
GMP6:35 pmSeoul Gimpo Intl
Oct 15
GMP12:40 pmSeoul Gimpo Intl
17h 45m
1 stop
SEA2:25 pmSeattle/Tacoma Intl
$1,726

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
Oct 26
SEA9:56 amSeattle/Tacoma Intl
20h 09m
2 stops
GMP10:05 pmSeoul Gimpo Intl
Nov 16
GMP8:00 amSeoul Gimpo Intl
18h 50m
1 stop
SEA9:50 amSeattle/Tacoma Intl
$1,107
Japan Airlines
Oct 26
SEA12:50 pmSeattle/Tacoma Intl
17h 15m
1 stop
GMP10:05 pmSeoul Gimpo Intl
Nov 16
GMP8:00 amSeoul Gimpo Intl
18h 50m
1 stop
SEA9:50 amSeattle/Tacoma Intl
$1,111
Japan Airlines
Jan 28
SEA11:55 amSeattle/Tacoma Intl
17h 10m
1 stop
GMP10:05 pmSeoul Gimpo Intl
Mar 1
GMP7:40 pmSeoul Gimpo Intl
31h 15m
1 stop
SEA9:55 amSeattle/Tacoma Intl
$1,117

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 August 11, 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 Seattle/Tacoma Intl - GMP Seoul Gimpo Intl

SEAGMP

Seattle/Tacoma Intl

Sun 11/15

8:40 am-10:15 pm

2 stops20h 35m

Seoul Gimpo Intl

Tue 11/24

1:40 pm-2:37 pm

2 stops17h 57m

$1,002

SeattleSeoul

SEA Seattle/Tacoma Intl - GMP Seoul Gimpo Intl

SEAGMP

Seattle/Tacoma Intl

Sun 9/27

1:30 am-6:10 pm

1 stop24h 40m

Seoul Gimpo Intl

Sat 10/17

1:50 pm-6:40 pm

1 stop20h 50m

$1,035

SeattleSeoul

SEA Seattle/Tacoma Intl - GMP Seoul Gimpo Intl

SEAGMP

Seattle/Tacoma Intl

Sun 9/27

1:30 am-6:10 pm

1 stop24h 40m

Seoul Gimpo Intl

Sat 10/10

1:50 pm-6:40 pm

1 stop20h 50m

$1,035

SeattleSeoul

SEA Seattle/Tacoma Intl - GMP Seoul Gimpo Intl

SEAGMP

Seattle/Tacoma Intl

Sun 9/13

1:30 am-6:10 pm

1 stop24h 40m

Seoul Gimpo Intl

Sat 9/19

1:50 pm-7:40 pm

1 stop21h 50m

$1,035

SeattleSeoul

SEA Seattle/Tacoma Intl - GMP Seoul Gimpo Intl

SEAGMP

Seattle/Tacoma Intl

Wed 10/14

1:30 am-12:50 pm

1 stop19h 20m

Seoul Gimpo Intl

Sat 10/24

1:50 pm-6:40 pm

1 stop20h 50m

$1,047

SeattleSeoul

SEA Seattle/Tacoma Intl - GMP Seoul Gimpo Intl

SEAGMP

Seattle/Tacoma Intl

Thu 1/7

11:30 pm-12:50 pm

1 stop20h 20m

Seoul Gimpo Intl

Fri 1/29

1:50 pm-6:10 pm

1 stop21h 20m

$1,047

SeattleSeoul

SEA Seattle/Tacoma Intl - GMP Seoul Gimpo Intl

SEAGMP

Seattle/Tacoma Intl

Wed 10/14

1:30 am-12:50 pm

1 stop19h 20m

Seoul Gimpo Intl

Fri 10/23

1:50 pm-7:20 pm

1 stop21h 30m

$1,047

SeattleSeoul

SEA Seattle/Tacoma Intl - GMP Seoul Gimpo Intl

SEAGMP

Seattle/Tacoma Intl

Sun 10/18

1:30 am-6:10 pm

1 stop24h 40m

Seoul Gimpo Intl

Fri 10/30

1:50 pm-7:10 pm

1 stop21h 20m

$1,050

SeattleSeoul

SEA Seattle/Tacoma Intl - GMP Seoul Gimpo Intl

SEAGMP

Seattle/Tacoma Intl

Mon 10/26

9:56 am-10:05 pm

2 stops20h 09m

Seoul Gimpo Intl

Mon 11/16

8:00 am-9:50 am

1 stop18h 50m

$1,107
Quickest round-trip

SeattleSeoul

SEA Seattle/Tacoma Intl - GMP Seoul Gimpo Intl

SEAGMP

Seattle/Tacoma Intl

Thu 1/7

11:55 am-10:05 pm

1 stop17h 10m

Seoul Gimpo Intl

Thu 1/28

12:05 pm-9:55 am

1 stop14h 50m

$1,111

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

17h 10m

Direct flights

None
The fastest flight from State of Washington to Seoul Gimpo Intl Airport takes 17h 10m
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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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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