The cheapest times to fly from IAD to CMB are

  • January 8th to April 15th
  • September 17th to December 9th (except the week of November 26th)

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 CMB is late January. Prices can be as high as $1723 for Saturday flights during mid December, or as low as $767 for Wednesday flights around late January.


When to Fly to Colombo

Flying from Washington, DC (IAD) to Colombo (CMB) will usually cost between $818 to $1475 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 $851. Due to high demand the most expensive time to fly is mid December, with an average price of $1542. Planning your trip to low-cost times can easily save you $691 on economy flights and even more on first-class flights. Generally, any price below $1011 can be considered a good price for a round-trip IAD to CMB flight.

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

IAD to CMB Flight Prices

Compared to other flights, the IAD to CMB flight is priced close to the average and costs less than the average flight leaving from Washington. The average price per mile (for a direct flight) is $0.07, which is far below average.


Flight Prices by Day of the Week

Wednesday is usually the cheapest day to fly to CMB, and Monday the cheapest day to fly back into IAD. Saturdays are the most expensive days to fly to Colombo, and Fridays are the most expensive days to return to Washington. Selecting flights on the least expensive days could save you up to $102 (9%) on this flight.

Departing prices are for round-trip flights returning on the day of departure. For example, a flight departing on Wednesday and returning a week later will cost an average of $981. Return trip prices are from the CMB 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 CMB can generally find a 1-layover flight. Because there is not usually a direct flight option the real-world direct flight time of 17 hour 4 minutes may not be realistic.


Flight Questions Answered

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

Which airlines fly this route?

You can find 36 major airlines flying this route most often: Aeroflot, Air Canada, Air China, Air France, Air India, Alaska, Alitalia, American, Austrian, British Airways, Brussels Airlines, Cathay Dragon, Cathay Pacific, China Eastern, China Southern, Delta, EgyptAir, Emirates, Etihad, Finnair, Gulf Air, Iberia, KLM, Korean Air, Kuwait Airways, Lufthansa, Qatar Airways, Royal Air Maroc, Saudia, Singapore Airlines, SriLankan, SWISS, Tap Air Portugal, Turkish Airlines, United, Virgin Atlantic, and potentially more during busy seasons.

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

The distance between the two airports is roughly 8933 miles or 14376 kilometers.

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

The real-world flight time for a nonstop IAD to CMB flight is about 17 hour 4 minutes.

How many flights go between Washington, DC and Colombo?

It depends on the day of the week and the date, but a typical day might have around 77 available flights from IAD to CMB.


Airport Location Info


Departing Airport

Origination codeIAD
Origination airport nameWashington Dulles International Airport
CityWashington, DC
Countrythe United States

Return Airport

Destination codeCMB
Destination airport nameBandaranaike International Colombo Airport
CountrySri Lanka


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.