The cheapest times to fly from IAD to CPH are

  • January 8th to March 18th
  • April 16th to May 13th
  • August 13th to September 30th
  • October 29th to December 9th (except the week of November 19th)

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 IAD to CPH is late January. Prices can be as high as $996 for Saturday flights during late July, or as low as $513 for Monday flights around late January.


When to Fly to Copenhagen

Flying from Washington, DC (IAD) to Copenhagen (CPH) will usually cost between $526 to $869 per person if booking more than four weeks in advance. On average the very cheapest time to fly is late January with an average ticket price of $557. Due to high demand the most expensive time to fly is late July, with an average price of $909. Planning your trip to low-cost times can easily save you $353 on economy flights and even more on first-class flights. Generally, any price below $662 can be considered a good price for a round-trip IAD to CPH flight.

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

IAD to CPH Flight Prices

Compared to other flights, the IAD to CPH flight is cheaper than the average and costs less than the average flight leaving from Washington. The average price per mile (for a direct flight) is $0.1, which is far below average.


Flight Prices by Day of the Week

Monday is usually the cheapest day to fly to CPH, and Thursday the cheapest day to fly back into IAD. Saturdays are the most expensive days to fly out or take a return trip. Selecting flights on the least expensive days could save you up to $91 (12%) on this flight.

Departing prices are for round-trip flights returning on the day of departure. For example, a flight departing on Monday and returning a week later will cost an average of $637. Return trip prices are from the CPH to IAD 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 IAD to CPH can generally find a 0-layover flight. Because there is a direct flight option the real-world direct flight time of 8 hour 18 minutes may be realistic.


Flight Hacking IAD to CPH

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 IAD to CPH — but Champion Traveler does!

Hack #1: London (IAD > LHR > CPH)

  • Price for both tickets: $626
  • Average savings: $36 (5.37%)

See IAD to LHR flights

Hack #2: New York, NY (IAD > JFK > CPH)

  • Price for both tickets: $628
  • Average savings: $34 (5.14%)

See IAD to JFK flights


Flight Questions Answered

Still have questions about flying from IAD to CPH? We’ve got answers.

Which airlines fly this route?

You can find 35 major airlines flying this route most often: Aer Lingus, Aeroflot, Air Canada, Air France, Air India, Alitalia, American, Atlantic Airways, Austrian, British Airways, Brussels Airlines, Delta, Eurowings, Finnair, Frontier, Iberia, Icelandair, KLM, LOT, Lufthansa, Norwegian, Norwegian Air International, Norwegian Air UK, Porter Airlines, Royal Air Maroc, SAS, Singapore Airlines, SWISS, Tap Air Portugal, THAI, Turkish Airlines, United, Virgin Atlantic, WestJet, Wizz Air, and potentially more during busy seasons.

How far away is it from Kastrup Airport to Washington Dulles International Airport?

The distance between the two airports is roughly 4063 miles or 6539 kilometers.

How long does it take to fly from IAD to CPH?

The real-world flight time for a nonstop IAD to CPH flight is about 8 hour 18 minutes.

How many flights go between Washington, DC and Copenhagen?

It depends on the day of the week and the date, but a typical day might have around 71 available flights from IAD to CPH.


Airport Location Info


Departing Airport

Origination code IAD
Origination airport name Washington Dulles International Airport
City Washington, DC
Country the United States
Latitude 38.9
Longitude -77.5

Return Airport

Destination code CPH
Destination airport name Kastrup Airport
City Copenhagen
Country Denmark
Latitude 55.6
Longitude 12.7


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.