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Cheap flights from Washington, D.C. to Seoul from $645

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, D.C. to Seoul departing on 8/17. 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
1:15 am - 7:15 pm
IAD
-
GMP
29h 00m
1 stop
EVA Air Logo
1:50 pm - 10:00 pm
GMP
-
IAD
21h 10m
1 stop
$1,182EVA Air
Mon, Sep 14 - Fri, Oct 2
EVA Air Logo
1:15 am - 7:15 pm
IAD
-
GMP
29h 00m
1 stop
EVA Air Logo
1:50 pm - 10:00 pm
GMP
-
IAD
21h 10m
1 stop
$1,185EVA Air
Mon, Sep 14 - Fri, Sep 25
EVA Air Logo
1:15 am - 12:50 pm
IAD
-
GMP
22h 35m
1 stop
EVA Air Logo
1:50 pm - 10:00 pm
GMP
-
IAD
21h 10m
1 stop
$1,219EVA Air
Wed, Sep 16 - Fri, Sep 25
EVA Air Logo
1:15 am - 12:50 pm
IAD
-
GMP
22h 35m
1 stop
EVA Air Logo
1:50 pm - 10:00 pm
GMP
-
IAD
21h 10m
1 stop
$1,221EVA Air
Wed, Oct 7 - Fri, Oct 16
EVA Air Logo
1:15 am - 12:50 pm
IAD
-
GMP
22h 35m
1 stop
EVA Air Logo
7:00 pm - 8:55 pm
GMP
-
IAD
39h 55m
1 stop
$1,280EVA Air
Wed, Sep 30 - Tue, Dec 1
EVA Air Logo
1:15 am - 12:50 pm
IAD
-
GMP
22h 35m
1 stop
EVA Air Logo
1:50 pm - 10:00 pm
GMP
-
IAD
21h 10m
1 stop
$1,318EVA Air
Wed, Sep 30 - Sat, Oct 17
Multiple Airlines Logo
1:15 am - 7:15 pm
IAD
-
GMP
29h 00m
1 stop
Multiple Airlines Logo
1:50 pm - 5:40 am
GMP
-
IAD
28h 50m
2 stops
$1,404Multiple Airlines
Mon, Sep 14 - Fri, Sep 25
Japan Airlines Logo
6:23 pm - 10:40 am
DCA
-
GMP
27h 17m
2 stops
Japan Airlines Logo
8:00 am - 11:02 pm
GMP
-
DCA
28h 02m
2 stops
$1,405Japan Airlines
Wed, Sep 2 - Mon, Sep 14
Japan Airlines Logo
6:30 am - 9:15 pm
DCA
-
GMP
25h 45m
2 stops
Japan Airlines Logo
12:05 pm - 10:57 pm
GMP
-
DCA
23h 52m
2 stops
$1,406Japan Airlines
Mon, Sep 14 - Mon, Oct 5
Japan Airlines Logo
6:30 am - 9:15 pm
DCA
-
GMP
25h 45m
2 stops
Japan Airlines Logo
12:05 pm - 10:57 pm
GMP
-
DCA
23h 52m
2 stops
$1,407Japan Airlines
Mon, Sep 14 - Mon, Oct 5

EVA Air flights from Washington, D.C. to Seoul Gimpo Intl Airport

Our best EVA Air deals on Washington, D.C. to Seoul Gimpo Intl Airport flight tickets
EVA Air
Sep 14
IAD1:15 amWashington, D.C. Dulles Intl
29h 00m
1 stop
GMP7:15 pmSeoul Gimpo Intl
Oct 2
GMP1:50 pmSeoul Gimpo Intl
21h 10m
1 stop
IAD10:00 pmWashington, D.C. Dulles Intl
$1,182
EVA Air
Sep 14
IAD1:15 amWashington, D.C. Dulles Intl
29h 00m
1 stop
GMP7:15 pmSeoul Gimpo Intl
Sep 25
GMP1:50 pmSeoul Gimpo Intl
21h 10m
1 stop
IAD10:00 pmWashington, D.C. Dulles Intl
$1,185
EVA Air
Sep 16
IAD1:15 amWashington, D.C. Dulles Intl
22h 35m
1 stop
GMP12:50 pmSeoul Gimpo Intl
Sep 25
GMP1:50 pmSeoul Gimpo Intl
21h 10m
1 stop
IAD10:00 pmWashington, D.C. Dulles Intl
$1,219

Japan Airlines flights from Washington, D.C. to Seoul Gimpo Intl Airport

Our best Japan Airlines deals on Washington, D.C. to Seoul Gimpo Intl Airport flight tickets
Japan Airlines
Sep 2
DCA6:23 pmWashington, D.C. Reagan-National
27h 17m
2 stops
GMP10:40 amSeoul Gimpo Intl
Sep 14
GMP8:00 amSeoul Gimpo Intl
28h 02m
2 stops
DCA11:02 pmWashington, D.C. Reagan-National
$1,405
Japan Airlines
Sep 14
DCA6:30 amWashington, D.C. Reagan-National
25h 45m
2 stops
GMP9:15 pmSeoul Gimpo Intl
Oct 5
GMP12:05 pmSeoul Gimpo Intl
23h 52m
2 stops
DCA10:57 pmWashington, D.C. Reagan-National
$1,406
Japan Airlines
Sep 14
DCA6:30 amWashington, D.C. Reagan-National
25h 45m
2 stops
GMP9:15 pmSeoul Gimpo Intl
Oct 5
GMP12:05 pmSeoul Gimpo Intl
23h 52m
2 stops
DCA10:57 pmWashington, D.C. Reagan-National
$1,407

momondo Fare Finder

 
Customize your flight search to find flights from Washington, D.C. 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 10, 2026.
Use the filters below to find and compare flights from Washington, D.C. to Seoul Gimpo Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Washington, D.C.Seoul

IAD - GMP

IADGMP

Washington, D.C. Dulles Intl

Mon 9/14

1:15 am-7:15 pm

1 stop29h 00m

Seoul Gimpo Intl

Fri 10/2

1:50 pm-10:00 pm

1 stop21h 10m

$1,182

Washington, D.C.Seoul

IAD - GMP

IADGMP

Washington, D.C. Dulles Intl

Mon 9/14

1:15 am-7:15 pm

1 stop29h 00m

Seoul Gimpo Intl

Fri 9/25

1:50 pm-10:00 pm

1 stop21h 10m

$1,185
Quickest round-trip

Washington, D.C.Seoul

IAD - GMP

IADGMP

Washington, D.C. Dulles Intl

Wed 9/16

1:15 am-12:50 pm

1 stop22h 35m

Seoul Gimpo Intl

Fri 9/25

1:50 pm-10:00 pm

1 stop21h 10m

$1,219

Washington, D.C.Seoul

IAD - GMP

IADGMP

Washington, D.C. Dulles Intl

Wed 10/7

1:15 am-12:50 pm

1 stop22h 35m

Seoul Gimpo Intl

Fri 10/16

1:50 pm-10:00 pm

1 stop21h 10m

$1,221

Washington, D.C.Seoul

IAD - GMP

IADGMP

Washington, D.C. Dulles Intl

Wed 9/30

1:15 am-12:50 pm

1 stop22h 35m

Seoul Gimpo Intl

Tue 12/1

7:00 pm-8:55 pm

1 stop39h 55m

$1,280

Washington, D.C.Seoul

IAD - GMP

IADGMP

Washington, D.C. Dulles Intl

Wed 9/30

1:15 am-12:50 pm

1 stop22h 35m

Seoul Gimpo Intl

Sat 10/17

1:50 pm-10:00 pm

1 stop21h 10m

$1,318

Washington, D.C.Seoul

IAD - GMP

IADGMP

Washington, D.C. Dulles Intl

Mon 9/14

1:15 am-7:15 pm

1 stop29h 00m

Seoul Gimpo Intl

Fri 9/25

1:50 pm-5:40 am

2 stops28h 50m

$1,404

Washington, D.C.Seoul

DCA - GMP

DCAGMP

Washington, D.C. Reagan-National

Wed 9/2

6:23 pm-10:40 am

2 stops27h 17m

Seoul Gimpo Intl

Mon 9/14

8:00 am-11:02 pm

2 stops28h 02m

$1,405

Washington, D.C.Seoul

DCA - GMP

DCAGMP

Washington, D.C. Reagan-National

Mon 9/14

6:30 am-9:15 pm

2 stops25h 45m

Seoul Gimpo Intl

Mon 10/5

12:05 pm-10:57 pm

2 stops23h 52m

$1,406

Washington, D.C.Seoul

DCA - GMP

DCAGMP

Washington, D.C. Reagan-National

Mon 9/14

6:30 am-9:15 pm

2 stops25h 45m

Seoul Gimpo Intl

Mon 10/5

12:05 pm-10:57 pm

2 stops23h 52m

$1,407

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 Washington, D.C. 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

Can stopping save me money on Washington, D.C. to Seoul Gimpo Intl Airport flights?

You could potentially save up to 57% on your flight if you consider stops on a Washington, D.C. to Seoul Gimpo Intl Airport flight.

When to book flights from Washington, D.C. to Seoul Gimpo Intl Airport

Are you open to changing your travel dates? Check out the ideal times to fly from Washington, D.C. to Seoul Gimpo Intl Airport according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Washington, D.C. to Seoul Gimpo Intl Airport (WAS to GMP) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Washington, D.C. to Seoul Gimpo Intl Airport

Fastest flight time

20h 23m

Direct flights

None
The fastest flight from Washington, D.C. to Seoul Gimpo Intl Airport takes 20h 23m
There are no direct flights from Washington, D.C. to Seoul Gimpo Intl Airport. There are no popular flight routes from Washington, D.C. to Seoul Gimpo Intl Airport.
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Frequently asked questions about flying from Washington, D.C. to Seoul Gimpo Intl Airport

  • How far is Washington, D.C. to Seoul Gimpo Intl by plane?

    Seoul Gimpo Intl is 6935.3 mi away from Washington, D.C.. Typically, this will take 20h 23m by plane in normal conditions.

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

    Prices for flights from Washington, D.C. to Seoul Gimpo Intl Airport refresh daily.

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

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Washington, D.C. to Seoul Gimpo Intl Airport.

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

    The required travel and health documents for your Seoul Gimpo Intl Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Seoul Gimpo Intl Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Why use momondo?

Why should I use momondo to find a flight deal from Washington, D.C. to Seoul?

It is quick and easy to find Washington, D.C. to Seoul flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Seoul that suits you.

Can I find flights from Washington, D.C. to Seoul with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to Seoul from Washington, D.C. with this policy.

How can momondo help me find flights from Washington, D.C. to Seoul?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Washington, D.C. to Seoul.

I’m not ready to book a flight from Washington, D.C. to Seoul right now. Can momondo alert me if prices change?

If you are not ready to book a flight from Washington, D.C. 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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