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. Reagan-National Airport to Seoul Gimpo Intl Airport?

To save up to 70% on this flight, we recommend booking at least 44 days prior to travel. The price may fluctuate and will likely increase closer to your departure date. Users on Cheapflights have found tickets from Washington, D.C. Reagan-National Airport to Seoul Gimpo Intl Airport from $977 1-2 weeks out and tickets from $1,352 for flights departing within the next 72 hours.

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

January can be a great time to fly to Seoul Gimpo Intl Airport from Washington, D.C. Reagan-National Airport with a flight ticket averaging about $1,349. Cheapflights users have found deals in the month of January for as cheap as $863. The most expensive prices can be found in the month of June.

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

When flying from Washington, D.C. Reagan-National Airport to Seoul Gimpo Intl Airport, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Can I find deals for flights from Reagan-National to Gimpo Intl that include hotel bookings?

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

How can I find direct flights from Reagan-National to Gimpo Intl?

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

Can I find deals for business class flights from Reagan-National to Gimpo Intl?

Yes. Cheapflights offers flight deals from Reagan-National 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.

$613+ Cheap Flights from Washington, D.C. Reagan-National Airport to Seoul Gimpo Intl Airport

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Cheap flight deals from Reagan-National to Gimpo Intl

Round-trip from	$1,050 (FlightHub)
One-way from	$613 (Kiwi.com)
Popular in	June
Cheapest in	January
Average price	$1,293

From Washington, D.C. Reagan-National to Seoul Gimpo Intl

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

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Highest demand for flights based on searches. 16% potential increase in price ($266 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 September 2025

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Find flight deals from Reagan-National to Gimpo Intl

Cheapest flights from Reagan-National to Gimpo Intl
Explore the most affordable flight options available from Reagan-National to Gimpo Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 15, 2025.

Wed 11/56:05 amDCA - GMP

2 stops38h 55mChina Eastern

Mon 11/108:50 pmGMP - DCA

2 stops35h 10mChina Eastern

Deal found 9/13

$1,050

Tue 10/218:00 amDCA - GMP

2 stops24h 50mMultiple Airlines

Mon 10/278:00 amGMP - DCA

2 stops26h 59mMultiple Airlines

Deal found 9/14

$1,495

Mon 10/136:00 amDCA - GMP

3 stops27h 25mMultiple Airlines

Mon 10/207:55 amGMP - DCA

2 stops26h 56mMultiple Airlines

Deal found 9/15

$1,584

Wed 10/296:00 amDCA - GMP

3 stops26h 55mMultiple Airlines

Wed 11/58:20 amGMP - DCA

3 stops28h 15mMultiple Airlines

Deal found 9/14

$1,644

Tue 10/216:00 amDCA - GMP

3 stops27h 25mMultiple Airlines

Tue 11/48:00 amGMP - DCA

2 stops28h 35mMultiple Airlines

Deal found 9/14

$1,671

Tue 10/283:30 pmDCA - GMP

2 stops30h 50mANA

Mon 11/37:50 pmGMP - DCA

2 stops30h 08mANA

Deal found 9/15

$1,679

Thu 10/303:30 pmDCA - GMP

2 stops30h 50mANA

Thu 11/67:50 pmGMP - DCA

2 stops30h 08mANA

Deal found 9/15

$1,732

Mon 9/226:45 amDCA - GMP

2 stops22h 15mMultiple Airlines

Wed 10/157:55 amGMP - DCA

2 stops21h 31mMultiple Airlines

Deal found 9/14

$1,758

Fri 10/176:38 amDCA - GMP

2 stops26h 12mJapan Airlines

Tue 10/288:00 amGMP - DCA

2 stops27h 57mJapan Airlines

Deal found 9/13

$1,786

Best flights from Reagan-National to Gimpo Intl
Discover carefully curated flight deals from Reagan-National to Gimpo Intl that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 15, 2025.

Wed 11/56:05 amDCA - GMP

2 stops38h 55mChina Eastern

Mon 11/108:50 pmGMP - DCA

2 stops35h 10mChina Eastern

Deal found 9/13

$1,050

Tue 2/39:40 amDCA - GMP

2 stops22h 50mMultiple Airlines

Thu 2/128:00 amGMP - DCA

2 stops22h 26mMultiple Airlines

Deal found 9/14

$1,602

Wed 10/293:30 pmDCA - GMP

2 stops30h 50mANA

Wed 11/57:50 pmGMP - DCA

2 stops30h 08mANA

Deal found 9/14

$1,679

Fri 11/76:10 amDCA - GMP

2 stops25h 55mJapan Airlines

Wed 11/198:00 amGMP - DCA

2 stops27h 30mJapan Airlines

Deal found 9/14

$1,831

Mon 11/36:05 amDCA - GMP

2 stops38h 55mChina Eastern

Mon 11/108:50 pmGMP - DCA

2 stops35h 10mChina Eastern

Deal found 9/13

$1,050

Mon 11/1711:10 amDCA - GMP

2 stops33h 50mChina Eastern

Mon 11/248:50 pmGMP - DCA

2 stops35h 10mChina Eastern

Deal found 9/13

$1,050

Mon 11/1011:10 amDCA - GMP

2 stops42h 40mChina Eastern

Mon 11/1712:00 pmGMP - DCA

2 stops44h 00mChina Eastern

Deal found 9/14

$1,050

Wed 10/299:21 amDCA - GMP

2 stops23h 44mMultiple Airlines

Wed 11/58:00 amGMP - DCA

2 stops21h 55mMultiple Airlines

Deal found 9/14

$1,760

Tue 2/108:00 amDCA - GMP

2 stops24h 05mJapan Airlines

Tue 3/108:00 amGMP - DCA

2 stops21h 29mJapan Airlines

Deal found 9/13

$1,861

Mon 11/108:40 amDCA - GMP

2 stops23h 25mMultiple Airlines

Wed 11/1912:05 pmGMP - DCA

2 stops22h 39mMultiple Airlines

Deal found 9/13

$1,834

Tue 10/146:38 amDCA - GMP

2 stops26h 12mJapan Airlines

Wed 11/1212:05 pmGMP - DCA

2 stops23h 25mJapan Airlines

Deal found 9/13

$1,871

Mon 10/276:59 amDCA - GMP

2 stops26h 06mMultiple Airlines

Mon 11/108:00 amGMP - DCA

2 stops21h 50mMultiple Airlines

Deal found 9/14

$1,865

Last-minute flights from Reagan-National to Gimpo Intl
Discover last-minute flight deals from Reagan-National to Gimpo Intl. Data last updated September 15, 2025 and is based on user searches.

Mon 9/229:20 amDCA - GMP

2 stops23h 30mMultiple Airlines

Wed 10/157:55 amGMP - DCA

2 stops21h 31mMultiple Airlines

Deal found 9/13

$1,758

Mon 10/136:00 amDCA - GMP

3 stops27h 25mMultiple Airlines

Mon 10/207:55 amGMP - DCA

2 stops26h 56mMultiple Airlines

Deal found 9/15

$1,584

Fri 10/176:38 amDCA - GMP

2 stops26h 12mJapan Airlines

Tue 10/288:00 amGMP - DCA

2 stops27h 57mJapan Airlines

Deal found 9/13

$1,786

Tue 10/218:00 amDCA - GMP

2 stops24h 50mMultiple Airlines

Mon 10/278:00 amGMP - DCA

2 stops26h 59mMultiple Airlines

Deal found 9/14

$1,495

Tue 10/216:00 amDCA - GMP

3 stops27h 25mMultiple Airlines

Tue 11/48:00 amGMP - DCA

2 stops28h 35mMultiple Airlines

Deal found 9/14

$1,671

Mon 10/2710:15 amDCA - GMP

2 stops22h 50mMultiple Airlines

Mon 11/108:00 amGMP - DCA

2 stops21h 55mMultiple Airlines

Deal found 9/13

$1,800

Tue 10/283:30 pmDCA - GMP

2 stops30h 50mANA

Tue 11/47:50 pmGMP - DCA

2 stops30h 08mANA

Deal found 9/13

$1,679

Wed 10/296:00 amDCA - GMP

3 stops26h 55mMultiple Airlines

Wed 11/58:20 amGMP - DCA

3 stops28h 15mMultiple Airlines

Deal found 9/14

$1,644

Thu 10/303:30 pmDCA - GMP

2 stops30h 50mANA

Thu 11/67:50 pmGMP - DCA

2 stops30h 08mANA

Deal found 9/15

$1,732

One-way flights from Reagan-National to Gimpo Intl
Search for one-way flight options from Reagan-National to Gimpo Intl. Find affordable one-way fares based on user searches. Data last updated September 15, 2025.

Mon 9/298:59 amDCA - GMP

3 stops59h 36mMultiple Airlines

Deal found 9/15

$613

Sat 11/16:00 pmDCA - GMP

3 stops54h 05mMultiple Airlines

Deal found 9/14

$701

Mon 9/226:59 pmDCA - GMP

2 stops35h 16mEVA Air

Deal found 9/14

$714

Tue 9/306:59 pmDCA - GMP

2 stops52h 51mEVA Air

Deal found 9/14

$734

Sat 10/186:59 pmDCA - GMP

3 stops57h 06mMultiple Airlines

Deal found 9/14

$739

Mon 9/228:59 amDCA - GMP

3 stops43h 56mMultiple Airlines

Deal found 9/14

$758

Mon 11/39:59 amDCA - GMP

2 stops37h 06mMultiple Airlines

Deal found 9/14

$769

Sat 9/276:59 pmDCA - GMP

2 stops58h 11mEVA Air

Deal found 9/14

$773

Wed 10/156:59 pmDCA - GMP

3 stops53h 01mMultiple Airlines

Deal found 9/13

$788

Fri 11/76:58 pmDCA - GMP

3 stops50h 17mMultiple Airlines

Deal found 9/15

$792

Sun 9/218:59 amDCA - GMP

3 stops39h 51mMultiple Airlines

Deal found 9/14

$845

Cheapflights Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

Washington, D.C.Seoul

DCA - GMP

DCAGMP

Washington, D.C. Reagan-National

Wed 11/5

6:05 am-11:00 am

2 stops38h 55m

Seoul Gimpo Intl

Mon 11/10

8:50 pm-6:00 pm

2 stops35h 10m

$1,050

Washington, D.C.Seoul

DCA - GMP

DCAGMP

Washington, D.C. Reagan-National

Mon 11/3

6:05 am-11:00 am

2 stops38h 55m

Seoul Gimpo Intl

Mon 11/10

8:50 pm-6:00 pm

2 stops35h 10m

$1,050

Washington, D.C.Seoul

DCA - GMP

DCAGMP

Washington, D.C. Reagan-National

Mon 11/17

11:10 am-11:00 am

2 stops33h 50m

Seoul Gimpo Intl

Mon 11/24

8:50 pm-6:00 pm

2 stops35h 10m

$1,050

Washington, D.C.Seoul

DCA - GMP

DCAGMP

Washington, D.C. Reagan-National

Mon 11/10

11:10 am-7:50 pm

2 stops42h 40m

Seoul Gimpo Intl

Mon 11/17

12:00 pm-6:00 pm

2 stops44h 00m

$1,050

Washington, D.C.Seoul

DCA - GMP

DCAGMP

Washington, D.C. Reagan-National

Tue 2/3

9:40 am-10:30 pm

2 stops22h 50m

Seoul Gimpo Intl

Thu 2/12

8:00 am-4:26 pm

2 stops22h 26m

$1,602

Washington, D.C.Seoul

DCA - GMP

DCAGMP

Washington, D.C. Reagan-National

Wed 10/29

3:30 pm-11:20 am

2 stops30h 50m

Seoul Gimpo Intl

Wed 11/5

7:50 pm-11:58 am

2 stops30h 08m

$1,679

Washington, D.C.Seoul

DCA - GMP

DCAGMP

Washington, D.C. Reagan-National

Wed 10/29

9:21 am-10:05 pm

2 stops23h 44m

Seoul Gimpo Intl

Wed 11/5

8:00 am-3:55 pm

2 stops21h 55m

$1,760

Washington, D.C.Seoul

DCA - GMP

DCAGMP

Washington, D.C. Reagan-National

Fri 11/7

6:10 am-10:05 pm

2 stops25h 55m

Seoul Gimpo Intl

Wed 11/19

8:00 am-9:30 pm

2 stops27h 30m

$1,831

Washington, D.C.Seoul

DCA - GMP

DCAGMP

Washington, D.C. Reagan-National

Mon 11/10

8:40 am-10:05 pm

2 stops23h 25m

Seoul Gimpo Intl

Wed 11/19

12:05 pm-8:44 pm

2 stops22h 39m

$1,834

Washington, D.C.Seoul

DCA - GMP

DCAGMP

Washington, D.C. Reagan-National

Tue 2/10

8:00 am-10:05 pm

2 stops24h 05m

Seoul Gimpo Intl

Tue 3/10

8:00 am-4:29 pm

2 stops21h 29m

$1,861

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/15

Showing 1-10 of 22 results

Best time to book a flight from Reagan-National to Gimpo Intl

Have a flexible travel schedule? Discover the best time to fly to Gimpo Intl from Reagan-National 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.

Related info for your journey

How long is the flight from Washington, D.C. Reagan-National Airport to Seoul Gimpo Intl Airport?
There are many flights that can get you from Washington, D.C. Reagan-National Airport to Seoul Gimpo Intl Airport in 38h 55m. Fly via China Eastern to get the fastest option. The distance from Washington, D.C. Reagan-National Airport to Seoul Gimpo Intl Airport is about 6939 mi.
Can I find deals for flights from Reagan-National to Gimpo Intl that include hotel bookings?
Yes. In addition to deals on Reagan-National to Gimpo Intl flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Reagan-National to Gimpo Intl?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Reagan-National to Gimpo Intl.
Can I find deals for business class flights from Reagan-National to Gimpo Intl?
Yes. Cheapflights offers flight deals from Reagan-National 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.

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$613+ Cheap flights from Reagan-National (DCA) 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 9/29. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Reagan-National to Gimpo Intl with Cheapflights

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Cheap flight deals from Reagan-National to Gimpo Intl

Round-trip from

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Cheapest in

Average price

Find flight deals from Reagan-National to Gimpo Intl

Cheapest flights from Reagan-National to Gimpo IntlExplore the most affordable flight options available from Reagan-National to Gimpo Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 15, 2025.

Explore the most affordable flight options available from Reagan-National to Gimpo Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 15, 2025.

Cheapflights Fare Finder

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

Best time to book a flight from Reagan-National to Gimpo Intl

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

Related info for your journey

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

How long is the flight from Washington, D.C. Reagan-National Airport to Seoul Gimpo Intl Airport?

Can I find deals for flights from Reagan-National to Gimpo Intl that include hotel bookings?

How can I find direct flights from Reagan-National to Gimpo Intl?

Can I find deals for business class flights from Reagan-National to Gimpo Intl?

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Cheapest flights from Reagan-National to Gimpo Intl
Explore the most affordable flight options available from Reagan-National to Gimpo Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 15, 2025.