The cheapest times to fly from GMP to DCA are

  • January 22nd to March 11th
  • April 2nd to April 15th
  • August 27th to December 31st (except the week of December 10th)

based on data collected exclusively by Champion Traveler across tens of millions of flights. Among all the dates above, the very cheapest time to fly from GMP to DCA is mid to late November. Prices can be as high as $1997 for Sunday flights during late July, or as low as $741 for Tuesday flights around mid to late November.


When to Fly to Washington

Flying from Seoul (GMP) to Washington, DC (DCA) will usually cost between $778 to $1497 per person if booking more than four weeks in advance. On average the very cheapest time to fly is mid to late November with an average ticket price of $776. Due to high demand the most expensive time to fly is late July, with an average price of $1609. Planning your trip to low-cost times can easily save you $833 on economy flights and even more on first-class flights. Generally, any price below $1067 can be considered a good price for a round-trip GMP to DCA flight.

See below for a graph of average weekly prices for the GMP to DCA route. All prices are for round-trip tickets in USD.

GMP to DCA Flight Prices

Compared to other flights, the GMP to DCA flight is priced close to the average and costs less than the average flight leaving from Seoul. The average price per mile (for a direct flight) is $0.1, which is far below average.


Flight Prices by Day of the Week

Tuesday is usually the cheapest day to depart and return on this flight. Sundays are the most expensive days to fly to Washington, and Saturdays are the most expensive days to return to Seoul. Selecting flights on the least expensive days could save you up to $152 (10%) on this flight.

Departing prices are for round-trip flights returning on the day of departure. For example, a flight departing on Tuesday and returning a week later will cost an average of $1014. Return trip prices are from the DCA to GMP flight, and often highlight the quality of our data in showing the same trend.

Departing Prices by Day

Departure Day Prices

Return Trip Prices by Day

Return Day Prices


Nonstop Flights and Layovers

Travelers looking to fly from GMP to DCA can generally find a 2-layover flight. Because there is not usually a direct flight option the real-world direct flight time of 13 hour 29 minutes may not be realistic.


Alternative Nearby Airports

Champion Traveler tells you which airports are nearby and whether tickets might be cheaper alternative airports nearby. Sometimes it’s worth it to fly into a closer airport and then commute to your destination. Remember that there is not usually a nonstop flight from GMP to DCA while comparing.

Destination alternative #1: Washington Dulles International Airport (IAD) in Washington, DC

  • 24 miles (39 km) away from DCA
  • Usually 2.30% less expensive than DCA
  • 1-layover flights available

See GMP to IAD flights


Flight Hacking GMP to DCA

Flight hacking is when you book two tickets instead of a layover, sometimes with different airlines. You will need to either bring only a carry-on bag (highly recommended) or leave yourself plenty of time to go through security again. Flight hacking is completely allowed, but airlines don’t always tell you the cheapest way to get from GMP to DCA — but Champion Traveler does!

Hack #1: New York, NY (GMP > LGA > DCA)

  • Price for both tickets: $996
  • Average savings: $71 (6.65%)

See GMP to PEK flights

Hack #2: Beijing (GMP > PEK > DCA)

  • Price for both tickets: $998
  • Average savings: $69 (6.47%)

See GMP to LGA flights

Hack #3: Los Angeles, CA (GMP > LAX > DCA)

  • Price for both tickets: $1051
  • Average savings: $16 (1.5%)

See GMP to LAX flights


Flight Questions Answered

Still have questions about flying from GMP to DCA? We’ve got answers.

Which airlines fly this route?

You can find 17 major airlines flying this route most often: Air Canada, Alaska, American, ANA, Asiana, Austrian, China Eastern, China Southern, Delta, Hainan, JAL, JetBlue, KLM, Korean Air, Lufthansa, SWISS, United, and potentially more during busy seasons.

How far away is it from Ronald Reagan Washington National Airport to Gimpo International Airport?

The distance between the two airports is roughly 6943 miles or 11174 kilometers.

How long does it take to fly from GMP to DCA?

The real-world flight time for a nonstop GMP to DCA flight is about 13 hour 29 minutes.

How many flights go between Seoul and Washington, DC?

It depends on the day of the week and the date, but a typical day might have around 56 available flights from GMP to DCA.


Airport Location Info


Departing Airport

Origination code GMP
Origination airport name Gimpo International Airport
City Seoul
Country South Korea
Latitude 37.6
Longitude 126.8

Return Airport

Destination code DCA
Destination airport name Ronald Reagan Washington National Airport
City Washington, DC
Country the United States
Latitude 38.9
Longitude -77


Other Resources

Please note that while we’ve worked hard to analyzed tens of millions of flights to get you this data, we do not calculate current live prices or guarantee pricing. Please see our partners using the links above for current offers.