YOW - IAD

C$ 193 Find Cheap Flights from Ottawa to Washington Dulles Airport

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Ottawa to Dulles Intl departing on 9/4. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult

KAYAK searches hundreds of travel sites at once for deals on flights to Washington, D.C. Dulles Intl Airport

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Ottawa to Washington, D.C., as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Ottawa to Washington, D.C., as well as popular online travel agencies
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Cheap Flight Deals from Ottawa to Dulles Intl (YOW-IAD)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Ottawa to Dulles Intl that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.

Recent round-trip flight deals from Ottawa to Dulles Intl

KAYAK's recommended round-trip deals from the most popular airlines that fly from Ottawa to Dulles Intl.
Discover the best prices for you by selecting your travel dates on KAYAK.
Choose your dates
7:00 a.m. - 12:59 p.m.YOW-IAD
5h 59m1 stop
7:00 a.m. - 11:14 a.m.IAD-YOW
4h 14m1 stop
C$ 325Porter Airlines
Find Deal
Fri, 11 Apr - Mon, 14 Apr
9:40 a.m. - 12:59 p.m.YOW-IAD
3h 19m1 stop
7:00 a.m. - 3:29 p.m.IAD-YOW
8h 29m1 stop
C$ 326Porter Airlines
Find Deal
Wed, 16 Apr - Sat, 19 Apr
2:45 p.m. - 4:28 p.m.YOW-IAD
1h 43mdirect
10:14 p.m. - 11:53 p.m.IAD-YOW
1h 39mdirect
C$ 345Air Canada
Find Deal
Fri, 11 Apr - Sun, 13 Apr
11:00 a.m. - 3:13 p.m.YOW-IAD
4h 13m1 stop
10:14 p.m. - 11:53 p.m.IAD-YOW
1h 39mdirect
C$ 352Air Canada
Find Deal
Wed, 9 Apr - Sun, 13 Apr
7:00 a.m. - 12:59 p.m.YOW-IAD
5h 59m1 stop
3:30 p.m. - 9:35 p.m.IAD-YOW
6h 05m1 stop
C$ 374
Find Deal
Tue, 8 Apr - Tue, 15 Apr
6:05 a.m. - 11:44 a.m.YOW-IAD
5h 39m1 stop
8:17 a.m. - 9:58 a.m.IAD-YOW
1h 41mdirect
C$ 432United Airlines
Find Deal
Wed, 16 Apr - Sun, 20 Apr
5:55 a.m. - 10:24 p.m.YOW-IAD
16h 29m1 stop
2:00 p.m. - 12:22 a.m.IAD-YOW
10h 22m1 stop
C$ 478
Find Deal
Thu, 24 Apr - Sun, 27 Apr
7:29 p.m. - 9:13 p.m.YOW-IAD
1h 44mdirect
10:14 p.m. - 11:53 p.m.IAD-YOW
1h 39mdirect
C$ 546United Airlines
Find Deal
Sun, 11 May - Wed, 14 May
5:55 a.m. - 10:54 p.m.YOW-IAD
16h 59m2 stops
6:00 a.m. - 12:22 a.m.IAD-YOW
18h 22m2 stops
C$ 601WestJet
Find Deal
Thu, 29 May - Sun, 1 Jun
5:55 a.m. - 4:43 p.m.YOW-IAD
10h 48m2 stops
6:00 a.m. - 12:22 a.m.IAD-YOW
18h 22m2 stops
C$ 723WestJet
Find Deal
Thu, 24 Apr - Sun, 27 Apr

KAYAK's insights & trends for Ottawa to Dulles Intl flights

Get data-powered insights and trends into flights from Ottawa to Dulles Intl to help you find the cheapest flights, the best time to fly and much more.

What’s the cheapest day of the week to fly from Ottawa to Washington Dulles Airport?

The average price of all round-trip flights from Ottawa to Washington, D.C. Dulles Intl Airport clicked on KAYAK for each day over the last 12 months.
When flying from Ottawa to Washington Dulles Airport, you should consider leaving on a Friday and avoid Sundays if you are looking for the best rates. For your return to Ottawa, you’ll find the best rates on Saturdays and the most expensive ones on Mondays.

What is the cheapest month to fly from Ottawa to Washington, D.C. Dulles Intl Airport?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Ottawa to Washington, D.C. Dulles Intl Airport, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.
The cheapest month for flights from Ottawa to Washington, D.C. Dulles Intl Airport is June, where tickets cost C$ 421 (return) on average. On the other hand, the most expensive months are December and February, where the average cost of round-trip tickets is C$ 673 and C$ 583 respectively.

Can I save money by flying with a layover from Ottawa to Washington, D.C. Dulles Intl Airport?

The average round-trip price for all non-stop flights, flights with one layover, and flights with two layovers for the route found by users searching on KAYAK in the last 2 weeks.
Yes, flying with a layover may cost you more time, but you can also save money on the route, with a 2 stops layover the cheapest option at C$ 1,253 on average.

How far in advance should I book a flight from Ottawa to Washington, D.C. Dulles Intl Airport?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Ottawa to Washington, D.C. Dulles Intl Airport, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.
To get a below average price on the flight from Ottawa to Washington, D.C. Dulles Intl Airport, you should book around 3 weeks before departure. For the absolute cheapest price, our data suggests you should book 25 weeks before departure.

Good to know

Low season

February

High season

March

Cheapest flight

C$ 193
Best time to beat the crowds but there is an average 10% increase in price.
Most popular time to fly (1% more expensive on average)
Flight from Ottawa to Washington Dulles Airport

When to book flights from Ottawa to Dulles Intl

Are your dates flexible? Find out the best times to travel from Ottawa to Dulles Intl based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking Ottawa to Washington Dulles Airport flights

  • What is the cheapest flight from Ottawa to Washington, D.C. Dulles Intl Airport?

    In the last 3 days, the lowest price for a flight from Ottawa to Washington, D.C. Dulles Intl Airport was C$ 135 for a one-way ticket and C$ 227 for a round-trip.

  • Which airports will I be using when flying from Ottawa to Washington Dulles Airport?

    Ottawa airport is called Ottawa and the only airport in Washington Dulles Airport is Washington, D.C. Dulles Intl.

  • Which airlines offer Wi-Fi service onboard planes from Ottawa to Washington Dulles Airport?

    Only Air Canada offers inflight Wi-Fi service on the Ottawa to Washington Dulles Airport flight route.

  • Which aircraft models fly most regularly from Ottawa to Washington Dulles Airport?

    The Canadair (Bombardier) Regional Jet CRJ-550 is the aircraft model that flies most regularly on the Ottawa to Washington Dulles Airport flight route.

  • Which airline alliances offer flights from Ottawa to Washington Dulles Airport?

    Star Alliance is the only airline alliance operating flights between Ottawa and Washington Dulles Airport.

  • On which days can I fly direct from Ottawa to Washington Dulles Airport?

    There are direct flights from Ottawa to Washington Dulles Airport on a daily basis.

  • Which is the best airline for flights from Ottawa to Washington, D.C., Porter Airlines or United Airlines?

    The two airlines most popular with KAYAK users for flights from Ottawa to Washington, D.C. are Porter Airlines and United Airlines. With an average price for the route of C$ 452 and an overall rating of 8.0, Porter Airlines is the most popular choice. United Airlines is also a great choice for the route, with an average price of C$ 576 and an overall rating of 7.4.

  • How does KAYAK find such low prices on flights from Ottawa to Washington Dulles Airport?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Ottawa to Washington Dulles Airport.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Ottawa to Washington Dulles Airport?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Washington Dulles Airport from Ottawa is likely to change within 7 days, so travellers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Ottawa to Washington Dulles Airport?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Washington Dulles Airport with an airline and back to Ottawa with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Ottawa to Washington Dulles Airport?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Washington Dulles Airport from Ottawa up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

KAYAK’s top tips for finding a cheap flight from Ottawa to Washington, D.C. Dulles Intl Airport

  • Looking for a cheap flight? 25% of our users found flights on this route for C$ 359 or less one-way and C$ 588 or less round-trip.

Prefer to fly direct from Ottawa to Washington Dulles Airport?

Find which airlines fly direct from Ottawa Airport to Washington, D.C. Dulles Intl Airport, which days they fly and book direct flights.

Direct departures

Ottawa to Washington, D.C. Dulles Intl

Monday

Air Canada,United Airlines

Air Canada,United Airlines

Tuesday

Air Canada,United Airlines

Air Canada,United Airlines

Wednesday

Air Canada,United Airlines

Air Canada,United Airlines

Thursday

Air Canada,United Airlines

Air Canada,United Airlines

Friday

Air Canada,United Airlines

Air Canada,United Airlines

Saturday

Air Canada,Avianca,United Airlines

Air Canada,Avianca, +1 more

Sunday

Air Canada,United Airlines

Air Canada,United Airlines

See more nonstop flights

Direct returns

Washington, D.C. Dulles Intl to Ottawa

Monday

Air Canada,Avianca,United Airlines

Air Canada,Avianca, +1 more

Tuesday

Air Canada,Avianca,United Airlines

Air Canada,Avianca, +1 more

Wednesday

Air Canada,Avianca,United Airlines

Air Canada,Avianca, +1 more

Thursday

Air Canada,Avianca,United Airlines

Air Canada,Avianca, +1 more

Friday

Air Canada,Avianca,United Airlines

Air Canada,Avianca, +1 more

Saturday

Air Canada,Avianca,United Airlines

Air Canada,Avianca, +1 more

Sunday

Air Canada,Avianca,United Airlines

Air Canada,Avianca, +1 more

See more nonstop flights
See more nonstop flights

Top 3 airlines serving from Ottawa to Dulles Intl

 
See real verified KAYAK customer reviews for airlines flying from Ottawa to Washington, D.C.. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Ottawa to Dulles Intl? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.0
Porter AirlinesOverall score based on 277 reviews
8.7Crew
8.1Comfort
8.2Boarding
7.6Food
7.0Entertainment
Airline reviews

The staff is always great. Just the fact that our flight was the only one delayed from Halifax when all other carries were still flying. It happen a year ago out of Toronto as well. All others were flying but our flight got cancelled 1 hr before the time of departure.

4.0 OkayJason, Feb 2025YHZ - YUL
Read more Porter Airlines reviews

The staff is always great. Just the fact that our flight was the only one delayed from Halifax when all other carries were still flying. It happen a year ago out of Toronto as well. All others were flying but our flight got cancelled 1 hr before the time of departure.

The only issue had when i mentioned about comfort was the man beside me was on the larger side and took about 1/3 of my seat where i was pressed against the wall/window of the plane for the trip.

The check-in staff, boarding staff, and flight crew were all very friendly. Really miss the Porter lounge in Ottawa.

Thanks for giving a beer to everyone in the seat infront of me and then telling me that I can’t have one because they are going to land. I guess I need to pay for a seat and then pick one in the very front of the plane

The flight was delayed by more than one hour. The terminal was consequently overcrowded and hot. We lost our car reservation and hit rush hour traffic in Boston, which added two hours stuck in traffic to our trip.

Awesome, the whole way through. Thank you, this is the new Canadian Airline benchmark.

We were given a complimentary seat upgrade which was so unexpected but so lovely!

Porter was excellent. Boarding was a breeze. The seats were a little uncomfortably but the overall trip was excellent.

Only packaged snacks were served. It was a flight at lunchtime and a hot meal would have been a great.

Reserve check-in was very slow compared to regular check-in. Internet was slow

Mostly the experience was good except for the flight changes made by UA which meant longer layover in DC

Terrible. First of all we were delayed 4 3/4 hours departing Honolulu. As we had to leave our condo and the rental car had to be returned we had to go to the airport. Even though we had a business class boarding pass to Washington, since we did not have business class to Montreal we could not access the lounge without paying a $59 fee each. This does not make sense to us. Since we could not meet our original connection United booked us to Montreal via New York LaGuardia on Air Canada. In Washington a further delay got us into LaGuardia too late to make our connection to Montreal so we were booked on another Air Canada flight 3 hours later. We were originally scheduled to arrive in Montreal at 10:40 and arrived at 19:55. A totally exhausting day, United did not offer a meal voucher or any type of compensation. Air Canada did give us a digital meal voucher. The food in United business class is poor among all meals offered. The pods look nice but are not that confortable. Overall would not fly on United again.

Change cabin crew assisting business class. Not taking care, ignoring requests and calls. Never had such an experience in business class.

United left one of our bags back in SFO but that’s not my real complaint. The complaint is how it all went down. So we checked in the day before online and were told we could use the quick drop for luggage. So the next day I used baggage quick drop curbside at SFO. The agent mistakenly didn't tag my bag as he put my bag on the conveyor belt untagged. We immediately alerted him he had not tagged the bag. I walked with him to the baggage service office to find my bag and tag it. We waited outside the office for 10 mins. He came out and said everything was ok and the bag was going to be tagged and on my flight. We received a text that one of our bags was on the flight but the other was not. I alerted my first class flight attendant immediately upon boarding the flight. She was helpful and said she’d get it sorted out right away. She called over the gate agent. The gate agent used my bag number and looked over information on her device. She said my bag was on the flight. The flight attendant was standing with her, looking at the device, and also said “yep it’s on the flight”. During the flight the flight attendant made reference to how reassuring it must feel knowing the bag was on the flight. Upon arriving to IAD we received a text that my bag was not on my flight. The text said my bag would arrive to my final destination LIS 24 hrs late. I understand that mistakes happen. I was totally ok with my bag mistakenly not getting tagged at the quick drop. I was fine with walking down to baggage services to tag my bag. But, what I am not ok with is that the United staff said they fixed the mistake two different times, assuring me twice that my bag would be/was on the plane…and it wasn’t. I expected better attention by the employees, for them to do what they said they were going to do. We also spent extra money to upgrade our seats to first class, including the entire return leg from Lisbon to San Francisco because we wanted a smoother and more relaxing travel experience. Our money was not well spent. We will not be using United for travel going forward.

The flight was delayed, it took longer than anticipated because of weather, and they broke my luggage.

Horrifying! And I am almost 2 million miles with United. Late by 3 1/2 hours. Worst: after two hours on the plane waiting, they decided that one of the tires had been damaged and then decided to change it. Another hour and a half to change the tire!!!!! NO EXCUSE FOR THIS. The crew didn't even offer a glass of water until we had been on the plane for FIVE hours. This is the worst airline in the world. I'm simply stuck because they fly on the only routes I need.

Gate got changed about 4 times. Very confusing and very crowded. If you don’t have wifi to help get updates, you can be in deep trouble.

Attendants zipped through cabin so fast hardly anyone got the water they told us we could have in the short flight. Nothing else was offered.

Sucks ! All three flights I was on this trip were delayed.

The flight attendants were unhelpful. It was a packed flight, and usually a flight attendant would help find a spot in the bin for your carry on or shift things around. Neither made any effort to do so. Also, I had to then check my bag. I was told it would be on the carousel in YYZ, but it came up on the jetway. So lucky I saw others standing around for their bags. I would have walked straight past this and on to the carousel. They could have at least told me that they had given me wrong information. Very unsatisfactory.

The take off was delayed as we were told that the baggages had to be rearranged to balance the weight. I only took a carry-on and a personal item, but the overhead bin was extremely small, even a normal size carryon can’t fit it, so they had to check it in for free. The seat was really tight and no entertainment at all.

The pork noodles were disgusting. The tuna sandwich had hardly any tuna and the bread was stale. A salad would have been better. An apple or a muffin.

So we didn't actually go. We were hoping to go for the Inauguration of the first female president. When That Guy got elected, we bailed. Unfortunately, we got basically none of our money back, despite having travel insurance. Would not fly with Air Canada again unless I had to.

This was my first time flying on Air Canada and the experience was good and pleasant enough, great crew members and the price I paid was amazing,

This was my first time and the experience was good and pleasant enough, great crew members and the price I paid was amazing,

Air Canada is the worst but the only option for my route

Super. Planes were clean. Flights were on time. boarding was smooth. Flight attendants were professional.

Flight was delayed by 45 min. No problems. Everyone took it in stride.

5-hour trip with just water and one cookie is not great: fruits and cheese,, salads, protein smoothie... It could be small but nourrishing No screen and no outlet to connect our electronic devices. If there were ,It would have been nice to be informed. Every instruction given in french by the agent on the plane was pronounced so quickly that despite french is my 1st language, I could not understand the instructions. Too fast, no intonation, no space between words. Most of the time, the english versions (my 2nd language) were fast but with breathing between words, good intonation and the information was much easier to understand.

The Flight Attendant was particularly helpful to my wife, who was having a bad day.

Everything you need to know for your flight from Ottawa to Dulles Intl

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