The cheapest times to fly from IAD to YOW are

  • February 26th to April 1st (except the week of March 12th)
  • 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 IAD to YOW is late September. Prices can be as high as $539 for Saturday flights during late July, or as low as $286 for Wednesday flights around late September.


When to Fly to Ottawa

Flying from Washington, DC (IAD) to Ottawa (YOW) will usually cost between $327 to $445 per person if booking more than four weeks in advance. On average the very cheapest time to fly is late September with an average ticket price of $319. Due to high demand the most expensive time to fly is late July, with an average price of $451. Planning your trip to low-cost times can easily save you $132 on economy flights and even more on first-class flights. Generally, any price below $409 can be considered a good price for a round-trip IAD to YOW flight.

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

IAD to YOW Flight Prices

Compared to other flights, the IAD to YOW flight is much cheaper than the average and costs much less than the average flight leaving from Washington. The average price per mile (for a direct flight) is $0.56, which is 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 $379. Return trip prices are from the YOW 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 YOW 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 IAD to YOW while comparing.

Destination alternative #1: Ogdensburg International Airport (OGS) in Ogdensburg, NY

  • 45 miles (72 km) away from YOW
  • Usually 44.87% less expensive than YOW
  • Nonstop flights available

See IAD to OGS flights

Destination alternative #2: Plattsburgh International Airport (PBG) in Plattsburgh, NY

  • 117 miles (188 km) away from YOW
  • Usually 40.83% less expensive than YOW
  • Nonstop flights available

See IAD to PBG flights

Destination alternative #3: Burlington International Airport (BTV) in Burlington, VT

  • 136 miles (219 km) away from YOW
  • Usually 26.53% less expensive than YOW
  • Nonstop flights available

See IAD to BTV flights

Destination alternative #4: Pierre Elliott Trudeau International Airport (YUL) in Montreal

  • 94 miles (151 km) away from YOW
  • Usually 14.67% less expensive than YOW
  • Nonstop flights available

See IAD to YUL flights


Flight Questions Answered

Still have questions about flying from IAD to YOW? 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 Ottawa Macdonald Cartier International Airport to Washington Dulles International Airport?

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

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

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

How many flights go between Washington, DC and Ottawa?

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


Airport Location Info


Departing Airport

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

Return Airport

Destination codeYOW
Destination airport nameOttawa Macdonald Cartier International Airport


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.