In terms of precipitation, rainfall in Seoul Gimpo Intl Airport ranges from 1.1 - 10.0 inches per month. July is typically the wettest month, when rainfall can reach 10.0 in. December is typically the driest time to visit Seoul Gimpo Intl Airport when rainfall is around 1.1 in.

If weather is an important factor for your trip to Seoul Gimpo Intl Airport, use this chart to help with planning. For those seeking warmer temperatures, August is the ideal time of year to visit, when temperatures reach an average of 77.0 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 35.6 F).

How far in advance should I book a flight from Washington, D.C. Dulles Intl Airport to Seoul Gimpo Intl Airport?

Users have found that booking a flight from Washington, D.C. Dulles Intl Airport to Seoul Gimpo Intl Airport at least 19 days early can save you up to 115% on average compared to booking a flight this week. If booking 19 days before your flight isn’t an option for you, users have found flights from Washington, D.C. Dulles Intl Airport to Seoul Gimpo Intl Airport for as little as $912 when booking for a departure date within the next two weeks. You can also check prices now. Some users have found airline tickets as low as $1,352 for flights departing within the next 3 days.

What is the cheapest month to fly from Washington, D.C. Dulles Intl Airport to Seoul Gimpo Intl Airport?

January is one of the best times of the year to fly to Seoul Gimpo Intl Airport from Washington, D.C. Dulles Intl Airport. Prices for January average $1,338 per person but you can even find prices for as low as $863. The most expensive prices can be found in the month of June. Opting for a January flight can save you 35% on your journey compared to booking in June

What is the cheapest time of day to fly from IAD to GMP?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Washington, D.C. Dulles Intl Airport to Seoul Gimpo Intl Airport as you normally would.

Can I find deals for flights from Dulles Intl to Gimpo Intl that include hotel bookings?

Yes. In addition to deals on Dulles Intl to Gimpo Intl flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from Dulles Intl to Gimpo Intl?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Dulles Intl to Gimpo Intl.

Can I find deals for business class flights from Dulles Intl to Gimpo Intl?

Yes. Cheapflights offers flight deals from Dulles Intl to Gimpo Intl by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

$571+ Flights from Washington, D.C. Dulles Intl Airport to Seoul Gimpo Intl Airport

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Cheap flight deals from Dulles Intl to Gimpo Intl

Round-trip from	$1,157 (CheapOair)
One-way from	$571 (Kiwi.com)
Popular in	June
Cheapest in	January
Average price	$1,538

From Washington, D.C. Dulles Intl to Seoul Gimpo Intl

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One-way flight from Washington, D.C. Dulles Intl to Seoul Gimpo Intl

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Highest demand for flights based on searches. 17% potential increase in price ($286 potential increase over avg. RT price).

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Cheapest flight prices on average. 3% potential price decrease ($43 potential savings vs. average RT price).

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Average for round-trip flights in July 2025

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Find flight deals from Dulles Intl to Gimpo Intl

Cheapest flights from Dulles Intl to Gimpo Intl
Explore the most affordable flight options available from Dulles Intl to Gimpo Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 29, 2025.

Tue 9/210:20 amIAD - GMP

2 stops23h 05mMultiple Airlines

Tue 9/169:00 amGMP - IAD

2 stops34h 31mMultiple Airlines

Deal found 7/28

$1,157

Tue 9/211:00 pmIAD - GMP

1 stop25h 05mAir China

Tue 9/98:35 amGMP - IAD

1 stop23h 55mAir China

Deal found 7/27

$1,322

Tue 9/912:15 pmIAD - GMP

1 stop21h 05mANA

Tue 9/1612:40 pmGMP - IAD

1 stop34h 25mANA

Deal found 7/29

$1,603

Best flights from Dulles Intl to Gimpo Intl
Discover carefully curated flight deals from Dulles Intl to Gimpo Intl that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 29, 2025.

Tue 9/210:20 amIAD - GMP

2 stops23h 05mMultiple Airlines

Tue 9/169:00 amGMP - IAD

2 stops34h 31mMultiple Airlines

Deal found 7/28

$1,157

Tue 9/211:00 pmIAD - GMP

1 stop25h 05mAir China

Tue 9/98:35 amGMP - IAD

1 stop23h 55mAir China

Deal found 7/27

$1,322

Tue 9/912:15 pmIAD - GMP

1 stop21h 05mANA

Tue 9/1612:40 pmGMP - IAD

1 stop34h 25mANA

Deal found 7/29

$1,603

Last-minute flights from Dulles Intl to Gimpo Intl
Discover last-minute flight deals from Dulles Intl to Gimpo Intl. Data last updated July 29, 2025 and is based on user searches.

Mon 8/412:15 pmIAD - GMP

1 stop21h 05mMultiple Airlines

Fri 8/88:40 amGMP - IAD

1 stop20h 05mMultiple Airlines

Deal found 7/27

$2,483

Fri 8/811:00 pmIAD - GMP

1 stop25h 05mAir China

Fri 11/72:25 pmGMP - IAD

2 stops30h 23mAir China

Deal found 7/27

$1,419

Fri 8/812:15 pmIAD - GMP

1 stop21h 05mANA

Thu 8/217:40 amGMP - IAD

1 stop21h 05mANA

Deal found 7/28

$2,181

Tue 8/1211:00 pmIAD - GMP

1 stop25h 05mAir China

Fri 9/128:35 amGMP - IAD

1 stop23h 55mAir China

Deal found 7/27

$1,371

Tue 8/2612:15 pmIAD - GMP

1 stop33h 50mANA

Tue 9/212:40 pmGMP - IAD

1 stop34h 25mANA

Deal found 7/27

$1,604

One-way flights from Dulles Intl to Gimpo Intl
Search for one-way flight options from Dulles Intl to Gimpo Intl. Find affordable one-way fares based on user searches. Data last updated July 29, 2025.

Mon 9/19:00 amIAD - GMP

3 stops43h 40mMultiple Airlines

Deal found 7/28

$571

Fri 8/2911:00 pmIAD - GMP

1 stop25h 05mAir China

Deal found 7/28

$741

Mon 9/156:09 pmIAD - GMP

2 stops36h 06mEVA Air

Deal found 7/28

$749

Cheapflights Fare Finder

Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport to Seoul Gimpo Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Washington, D.C.Seoul

IAD - GMP

IADGMP

Washington, D.C. Dulles Intl

Tue 9/2

10:20 am-10:25 pm

2 stops23h 05m

Seoul Gimpo Intl

Tue 9/16

9:00 am-6:31 am

2 stops34h 31m

$1,157

Washington, D.C.Seoul

IAD - GMP

IADGMP

Washington, D.C. Dulles Intl

Tue 9/2

11:00 pm-1:05 pm

1 stop25h 05m

Seoul Gimpo Intl

Tue 9/9

8:35 am-7:30 pm

1 stop23h 55m

$1,322

Washington, D.C.Seoul

IAD - GMP

IADGMP

Washington, D.C. Dulles Intl

Tue 9/9

12:15 pm-10:20 pm

1 stop21h 05m

Seoul Gimpo Intl

Tue 9/16

12:40 pm-10:05 am

1 stop34h 25m

$1,603

Washington, D.C.Seoul

IAD - GMP

IADGMP

Washington, D.C. Dulles Intl

Mon 9/1

9:00 am-5:40 pm

3 stops43h 40m

$571

Washington, D.C.Seoul

IAD - GMP

IADGMP

Washington, D.C. Dulles Intl

Fri 8/29

11:00 pm-1:05 pm

1 stop25h 05m

$741

Washington, D.C.Seoul

IAD - GMP

IADGMP

Washington, D.C. Dulles Intl

Mon 9/15

6:09 pm-7:15 pm

2 stops36h 06m

$749

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/28

Best time to book a flight from Dulles Intl to Gimpo Intl

Have a flexible travel schedule? Discover the best time to fly to Gimpo Intl from Dulles Intl with our price prediction graph.

Estimated round-trip price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Reviews of airlines servicing Gimpo Intl

Get a feel of what it's like to fly with EVA Air, ANA, and Air China from Washington, D.C. Dulles Intl Airport to Seoul Gimpo Intl Airport by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

EVA Air

8.4

Very good

1,221 reviews

Reviews

1 / 20

10.0

Excellent

Dale,Apr 2025

SFO - TPE

Great experience. Check in process was excellent - both online and bag drop

EVA Air

8.4

Very good

1,221 reviews

EVA Air

8.4

Very good

1,221 reviews

Reviews

1 / 20

10.0

Excellent

Dale,Apr 2025

SFO - TPE

Great experience. Check in process was excellent - both online and bag drop

ANA

8.4

Very good

922 reviews

EVA Air

8.4

Very good

1,221 reviews

Reviews

1 / 20

10.0

Excellent

Dale,Apr 2025

SFO - TPE

Great experience. Check in process was excellent - both online and bag drop

Air China

7.3

Good

91 reviews

EVA Air

8.4

Very good

1,221 reviews

Reviews

1 / 20

10.0

Excellent

Dale,Apr 2025

SFO - TPE

Great experience. Check in process was excellent - both online and bag drop

Related info for your journey

Can I find deals for flights from Dulles Intl to Gimpo Intl that include hotel bookings?
Yes. In addition to deals on Dulles Intl to Gimpo Intl flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Dulles Intl to Gimpo Intl?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Dulles Intl to Gimpo Intl.
Can I find deals for business class flights from Dulles Intl to Gimpo Intl?
Yes. Cheapflights offers flight deals from Dulles Intl to Gimpo Intl by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

Browse thousands of different options on Cheapflights for your next trip

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$571+ Cheap flights from Dulles Intl (IAD) to Gimpo Intl (GMP)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/1. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Dulles Intl to Gimpo Intl with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from Dulles Intl to Gimpo Intl

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from Dulles Intl to Gimpo Intl

Cheapest flights from Dulles Intl to Gimpo IntlExplore the most affordable flight options available from Dulles Intl to Gimpo Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 29, 2025.

Explore the most affordable flight options available from Dulles Intl to Gimpo Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 29, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport to Seoul Gimpo Intl Airport that are best for you.

Best time to book a flight from Dulles Intl to Gimpo Intl

Have a flexible travel schedule? Discover the best time to fly to Gimpo Intl from Dulles Intl with our price prediction graph.

Reviews of airlines servicing Gimpo Intl

Get a feel of what it's like to fly with EVA Air, ANA, and Air China from Washington, D.C. Dulles Intl Airport to Seoul Gimpo Intl Airport by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from Dulles Intl to Gimpo Intl. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

Can I find deals for flights from Dulles Intl to Gimpo Intl that include hotel bookings?

How can I find direct flights from Dulles Intl to Gimpo Intl?

Can I find deals for business class flights from Dulles Intl to Gimpo Intl?

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Dulles Intl to Gimpo Intl

See prices for flight routes from nearby airports that may be better suited for you.

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Travel Smart

Cheapest flights from Dulles Intl to Gimpo Intl
Explore the most affordable flight options available from Dulles Intl to Gimpo Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 29, 2025.