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Cheap flights from Washington to Seoul from $633

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 8/15. 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.
Japan Airlines Logo
7:03 am - 9:15 pm
SEA
-
GMP
22h 12m
2 stops
Japan Airlines Logo
12:05 pm - 4:11 pm
GMP
-
SEA
20h 06m
2 stops
$1,038Japan Airlines
Wed, Jul 22 - Mon, Aug 31
Japan Airlines Logo
7:03 am - 9:15 pm
SEA
-
GMP
22h 12m
2 stops
Japan Airlines Logo
8:00 am - 4:56 pm
GMP
-
SEA
25h 56m
2 stops
$1,147Japan Airlines
Tue, Jul 21 - Sat, Nov 14
Japan Airlines Logo
7:03 am - 9:15 pm
SEA
-
GMP
22h 12m
2 stops
Japan Airlines Logo
12:05 pm - 6:03 pm
GMP
-
SEA
22h 58m
2 stops
$1,245Japan Airlines
Tue, Jul 21 - Tue, Nov 17
Japan Airlines Logo
7:00 am - 9:15 pm
PDX
-
GMP
22h 15m
2 stops
Japan Airlines Logo
12:05 pm - 4:50 pm
GMP
-
PDX
20h 45m
2 stops
$1,247Japan Airlines
Tue, Sep 1 - Tue, Sep 8
Japan Airlines Logo
7:03 am - 9:15 pm
SEA
-
GMP
22h 12m
2 stops
Japan Airlines Logo
8:00 am - 6:03 pm
GMP
-
SEA
27h 03m
2 stops
$1,255Japan Airlines
Tue, Jul 21 - Thu, Nov 19
Japan Airlines Logo
7:00 am - 9:15 pm
PDX
-
GMP
22h 15m
2 stops
Japan Airlines Logo
12:05 pm - 4:50 pm
GMP
-
PDX
20h 45m
2 stops
$1,264Japan Airlines
Wed, Sep 2 - Thu, Sep 10
Japan Airlines Logo
1:25 pm - 10:40 am
SEA
-
GMP
29h 15m
1 stop
Japan Airlines Logo
8:00 am - 4:56 pm
GMP
-
SEA
25h 56m
2 stops
$1,267Japan Airlines
Sun, Jul 19 - Sat, Nov 14
Japan Airlines Logo
7:00 am - 9:15 pm
SEA
-
GMP
22h 15m
2 stops
Japan Airlines Logo
12:05 pm - 4:11 pm
GMP
-
SEA
20h 06m
2 stops
$1,273Japan Airlines
Mon, Jul 20 - Mon, Aug 31
Multiple Airlines Logo
7:00 am - 9:15 pm
GEG
-
GMP
22h 15m
2 stops
Multiple Airlines Logo
8:00 am - 1:23 pm
GMP
-
GEG
21h 23m
2 stops
$1,952Multiple Airlines
Wed, Sep 16 - Fri, Sep 25
Multiple Airlines Logo
7:00 am - 9:15 pm
GEG
-
GMP
22h 15m
2 stops
Multiple Airlines Logo
7:15 pm - 2:36 pm
GMP
-
GEG
35h 21m
2 stops
$2,056Multiple Airlines
Mon, Jun 8 - Mon, Jun 15

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 22
SEA7:03 amSeattle/Tacoma Intl
22h 12m
2 stops
GMP9:15 pmSeoul Gimpo Intl
Aug 31
GMP12:05 pmSeoul Gimpo Intl
20h 06m
2 stops
SEA4:11 pmSeattle/Tacoma Intl
$1,038
Japan Airlines
Jul 21
SEA7:03 amSeattle/Tacoma Intl
22h 12m
2 stops
GMP9:15 pmSeoul Gimpo Intl
Nov 14
GMP8:00 amSeoul Gimpo Intl
25h 56m
2 stops
SEA4:56 pmSeattle/Tacoma Intl
$1,147
Japan Airlines
Jul 21
SEA7:03 amSeattle/Tacoma Intl
22h 12m
2 stops
GMP9:15 pmSeoul Gimpo Intl
Nov 17
GMP12:05 pmSeoul Gimpo Intl
22h 58m
2 stops
SEA6:03 pmSeattle/Tacoma Intl
$1,245

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
Oct 5
SEA1:30 amSeattle/Tacoma Intl
25h 45m
1 stop
GMP7:15 pmSeoul Gimpo Intl
Oct 16
GMP1:50 pmSeoul Gimpo Intl
21h 30m
1 stop
SEA7:20 pmSeattle/Tacoma Intl
$1,168
EVA Air
Aug 23
SEA2:10 amSeattle/Tacoma Intl
24h 00m
1 stop
GMP6:10 pmSeoul Gimpo Intl
Sep 5
GMP1:50 pmSeoul Gimpo Intl
21h 50m
1 stop
SEA7:40 pmSeattle/Tacoma Intl
$1,182
EVA Air
Oct 29
SEA11:50 pmSeattle/Tacoma Intl
21h 00m
1 stop
GMP12:50 pmSeoul Gimpo Intl
Nov 7
GMP1:50 pmSeoul Gimpo Intl
21h 20m
1 stop
SEA6:10 pmSeattle/Tacoma Intl
$1,185

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 May 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
Quickest round-trip

SeattleSeoul

SEA - GMP

SEAGMP

Seattle/Tacoma Intl

Wed 7/22

7:03 am-9:15 pm

2 stops22h 12m

Seoul Gimpo Intl

Mon 8/31

12:05 pm-4:11 pm

2 stops20h 06m

$1,038

SeattleSeoul

SEA - GMP

SEAGMP

Seattle/Tacoma Intl

Tue 7/21

7:03 am-9:15 pm

2 stops22h 12m

Seoul Gimpo Intl

Sat 11/14

8:00 am-4:56 pm

2 stops25h 56m

$1,147

SeattleSeoul

SEA - GMP

SEAGMP

Seattle/Tacoma Intl

Tue 7/21

7:03 am-9:15 pm

2 stops22h 12m

Seoul Gimpo Intl

Tue 11/17

12:05 pm-6:03 pm

2 stops22h 58m

$1,245

PortlandSeoul

PDX - GMP

PDXGMP

Portland

Tue 9/1

7:00 am-9:15 pm

2 stops22h 15m

Seoul Gimpo Intl

Tue 9/8

12:05 pm-4:50 pm

2 stops20h 45m

$1,247

SeattleSeoul

SEA - GMP

SEAGMP

Seattle/Tacoma Intl

Tue 7/21

7:03 am-9:15 pm

2 stops22h 12m

Seoul Gimpo Intl

Thu 11/19

8:00 am-6:03 pm

2 stops27h 03m

$1,255

PortlandSeoul

PDX - GMP

PDXGMP

Portland

Wed 9/2

7:00 am-9:15 pm

2 stops22h 15m

Seoul Gimpo Intl

Thu 9/10

12:05 pm-4:50 pm

2 stops20h 45m

$1,264

SeattleSeoul

SEA - GMP

SEAGMP

Seattle/Tacoma Intl

Sun 7/19

1:25 pm-10:40 am

1 stop29h 15m

Seoul Gimpo Intl

Sat 11/14

8:00 am-4:56 pm

2 stops25h 56m

$1,267

SeattleSeoul

SEA - GMP

SEAGMP

Seattle/Tacoma Intl

Mon 7/20

7:00 am-9:15 pm

2 stops22h 15m

Seoul Gimpo Intl

Mon 8/31

12:05 pm-4:11 pm

2 stops20h 06m

$1,273

SpokaneSeoul

GEG - GMP

GEGGMP

Spokane

Wed 9/16

7:00 am-9:15 pm

2 stops22h 15m

Seoul Gimpo Intl

Fri 9/25

8:00 am-1:23 pm

2 stops21h 23m

$1,952

SpokaneSeoul

GEG - GMP

GEGGMP

Spokane

Mon 6/8

7:00 am-9:15 pm

2 stops22h 15m

Seoul Gimpo Intl

Mon 6/15

7:15 pm-2:36 pm

2 stops35h 21m

$2,056

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?

Japan Airlines and ANA 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 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.
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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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