The cheapest times to fly from YOW to IAD are

  • March 12th to April 1st
  • April 23rd to May 6th
  • July 30th to December 23rd

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 YOW to IAD is mid to late September. Prices can be as high as $502 for Saturday flights during late July, or as low as $248 for Wednesday flights around mid to late September.


When to Fly to Washington

Flying from Ottawa (YOW) to Washington, DC (IAD) will usually cost between $279 to $373 per person if booking more than four weeks in advance. On average the very cheapest time to fly is mid to late September with an average ticket price of $279. Due to high demand the most expensive time to fly is late July, with an average price of $400. Planning your trip to low-cost times can easily save you $121 on economy flights and even more on first-class flights. Generally, any price below $341 can be considered a good price for a round-trip YOW to IAD flight.

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

YOW to IAD Flight Prices

Compared to other flights, the YOW to IAD flight is much cheaper than the average and costs less than the average flight leaving from Ottawa. The average price per mile (for a direct flight) is $0.47, which is a bit above average.


Flight Prices by Day of the Week

Wednesday is usually the cheapest day to depart and return on this flight. 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 $28 (7%) 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 $319. Return trip prices are from the IAD to YOW 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 YOW to IAD can generally find a 0-layover flight. Because there is a direct flight option the real-world direct flight time of 1 hour 47 minutes may 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 a nonstop flight from YOW to IAD while comparing.

Destination alternative #1: Richmond International Airport (RIC) in Richmond, VA

  • 100 miles (161 km) away from IAD
  • Usually 18.06% less expensive than IAD
  • 1-layover flights available

See YOW to RIC flights

Destination alternative #2: Charlottesville Albemarle Airport (CHO) in Charlottesville, VA

  • 77 miles (124 km) away from IAD
  • Usually 17.03% less expensive than IAD
  • 1-layover flights available

See YOW to CHO flights

Destination alternative #3: Baltimore/Washington International Thurgood Marshall Airport (BWI) in Baltimore, MD

  • 45 miles (72 km) away from IAD
  • Usually 0.44% less expensive than IAD
  • 1-layover flights available

See YOW to BWI flights


Flight Questions Answered

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

Which airlines fly this route?

You can find 7 major airlines flying this route most often: Air Canada, American, Avianca, Delta, Porter Airlines, United, WestJet, and potentially more during busy seasons.

How far away is it from Washington Dulles International Airport to Ottawa Macdonald Cartier International Airport?

The distance between the two airports is roughly 450 miles or 724 kilometers.

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

The real-world flight time for a nonstop YOW to IAD flight is about 1 hour 47 minutes.

How many flights go between Ottawa and Washington, DC?

It depends on the day of the week and the date, but a typical day might have around 51 available flights from YOW to IAD.


Airport Location Info


Departing Airport

Origination codeYOW
Origination airport nameOttawa Macdonald Cartier International Airport

Return Airport

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


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.