YOW - IAD

C$ 206 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 4/4. 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
1 adult, Economy, 0 bags

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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Everything you should know

Cheapest round-trip
C$ 349
Overall average: C$ 519
Porter Airlines
Wed 18/2Wed 25/2
YOW - IAD • 1 stop
Cheapest direct flights
C$ 463
Typical prices: C$ 388-C$ 572
United Airlines
Fri 3/4Tue 7/4
YOW - IAD • Direct
Our travellers' advice
AI-powered summary based on content written by travel experts. AI can make mistakes.
United's Economy Plus offers more legroom for comfort.
Ottawa airport has quick security lines for travelers.
Expert advice
Expert advice
Expert advice
Expert advice
Top airlines
Porter Airlines
Cheapest • from C$ 349 (round-trip)
Porter Airlines
Best reviews • 7.9 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to travel
April
Cheapest • 21% price drop
March
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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KAYAK searches hundreds of sites at once to find you the best travel deals.
We hope you love your trip to Dulles Intl!
Flight Deals
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Expert advice
Flight Deals

Cheap Flights 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.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Ottawa to Dulles Intl

Wed, 18 Feb - Wed, 25 Feb
Porter Airlines Logo
7:00 a.m. - 10:22 a.m.
YOW
-
IAD
3h 22m
1 stop
Porter Airlines Logo
11:40 a.m. - 3:44 p.m.
IAD
-
YOW
4h 04m
1 stop
C$ 349Porter Airlines
Fri, 10 Apr - Sun, 12 Apr
Porter Airlines Logo
1:20 p.m. - 5:14 p.m.
YOW
-
IAD
3h 54m
1 stop
Porter Airlines Logo
11:40 a.m. - 3:04 p.m.
IAD
-
YOW
3h 24m
1 stop
C$ 354Porter Airlines
Wed, 25 Feb - Wed, 4 Mar
Porter Airlines Logo
7:00 a.m. - 10:22 a.m.
YOW
-
IAD
3h 22m
1 stop
Porter Airlines Logo
11:40 a.m. - 5:29 p.m.
IAD
-
YOW
5h 49m
1 stop
C$ 357Porter Airlines
Wed, 18 Feb - Thu, 26 Feb
Porter Airlines Logo
7:00 a.m. - 10:22 a.m.
YOW
-
IAD
3h 22m
1 stop
Porter Airlines Logo
11:40 a.m. - 3:44 p.m.
IAD
-
YOW
4h 04m
1 stop
C$ 361Porter Airlines
Fri, 10 Apr - Sun, 12 Apr
Porter Airlines Logo
1:20 p.m. - 5:14 p.m.
YOW
-
IAD
3h 54m
1 stop
Porter Airlines Logo
11:40 a.m. - 3:04 p.m.
IAD
-
YOW
3h 24m
1 stop
C$ 368Porter Airlines
Sun, 26 Apr - Thu, 30 Apr
Porter Airlines Logo
12:10 p.m. - 5:14 p.m.
YOW
-
IAD
5h 04m
1 stop
Porter Airlines Logo
11:40 a.m. - 5:29 p.m.
IAD
-
YOW
5h 49m
1 stop
C$ 371Porter Airlines
Sat, 21 Feb - Wed, 25 Feb
Porter Airlines Logo
8:40 a.m. - 12:34 p.m.
YOW
-
IAD
3h 54m
1 stop
Porter Airlines Logo
11:40 a.m. - 3:44 p.m.
IAD
-
YOW
4h 04m
1 stop
C$ 392Porter Airlines
Fri, 3 Apr - Tue, 7 Apr
Porter Airlines Logo
1:20 p.m. - 5:14 p.m.
YOW
-
IAD
3h 54m
1 stop
Porter Airlines Logo
6:30 p.m. - 10:29 p.m.
IAD
-
YOW
3h 59m
1 stop
C$ 399Porter Airlines
Mon, 9 Mar - Tue, 10 Mar
United Airlines Logo
7:30 p.m. - 9:23 p.m.
YOW
-
IAD
1h 53mdirect
United Airlines Logo
8:26 a.m. - 1:32 p.m.
IAD
-
YOW
5h 06m
1 stop
C$ 402United Airlines
Thu, 19 Feb - Mon, 23 Feb
Porter Airlines Logo
6:50 a.m. - 10:22 a.m.
YOW
-
IAD
3h 32m
1 stop
Porter Airlines Logo
11:40 a.m. - 6:09 p.m.
IAD
-
YOW
6h 29m
1 stop
C$ 403Porter Airlines
Booking Insights

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 Thursdays if you are looking for the best rates. For your return to Ottawa, you’ll find the best rates on Fridays and the most expensive ones on Sundays.

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 April, where tickets cost C$ 422 (return) on average. On the other hand, the most expensive months are August and September, where the average cost of round-trip tickets is C$ 726 and C$ 711 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 1 stop layover the cheapest option at C$ 540 on average.

Expert advice

Expert advice for your flight from Ottawa to Dulles Intl

 
AI-powered summary based on content written by travel experts. AI can make mistakes.
KAYAK teamed up with top travel experts to share the best tips for your journey.
Our travel experts
Stefanie Waldek

Stefanie Waldek

Expert on Air Canada, United Airlines and IAD

Stefanie Waldek is a freelance space, travel, and design writer based in Saratoga Springs, NY. Her words have appeared in Space.com, Travel + Leisure, Condé Nast Traveler, Architectural Digest, and House Beautiful, among other publications. An expert in aviation and expedition cruising, Stefanie is frequently up in the air or on the sea, likely en route to Antarctica or the Arctic.

Mark Stachiew

Mark Stachiew

Expert on YOW

Mark Stachiew has been exploring the world and writing about it for more than 30 years. His travel stories have appeared in numerous newspapers, magazines and online publications in Canada, the United States and beyond.

Good to know

Low seasonSeptember
Cheapest flightC$ 206
Best time to beat the crowds but there is an average 34% increase in price.
Most popular time to fly and prices are also 19% lower 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$ 206 for a one-way ticket and C$ 349 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?

    Air Canada, and Delta offer 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 Embraer 175 (Enhanced Winglets) 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$ 404 and an overall rating of 7.9, Porter Airlines is the most popular choice. United Airlines is also a great choice for the route, with an average price of C$ 597 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.

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$ 255 or less one-way and C$ 494 or less round-trip.

Prefer to fly direct from Ottawa to Washington Dulles Airport?

 
Direct data is based off flight results for the next 60 days. Find direct flights from all airlines flying direct from Ottawa to Washington, D.C. Dulles Intl.
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

United Airlines

United Airlines

Tuesday

United Airlines

United Airlines

Wednesday

United Airlines

United Airlines

Thursday

United Airlines

United Airlines

Friday

United Airlines

United Airlines

Saturday

United Airlines

United Airlines

Sunday

United Airlines

United Airlines

See more nonstop flights

Direct returns

Washington, D.C. Dulles Intl to Ottawa

Monday

United Airlines

United Airlines

Tuesday

United Airlines

United Airlines

Wednesday

United Airlines

United Airlines

Thursday

United Airlines

United Airlines

Friday

United Airlines

United Airlines

Saturday

United Airlines

United Airlines

Sunday

United Airlines

United Airlines

See more nonstop flights

Reviews of the top 3 airlines flying 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.
7.9
Porter AirlinesOverall score based on 412 reviews
7.9Comfort
6.9Entertainment
8.2Boarding
8.6Crew
7.5Food
Airline reviews

The Flight took off 2hrs late because there was no pilot showing up when the flight was ready to board.. Though the cabin crew was present and had prepared the plane, the FO turned around after 15 min and went away. A crew to fly the plane finally arrived over an hour later and we were able to board 1h30 min later than planned time... until everything was loaded, we left 2h late from the gate. This was a small plane, so don't expect any Entertainment... Wi-Fi access on board would work, but took an awful amount of time to figure out and get it work (I'm an IT person). Flying as VIPorter customer, I was expecting at least some warm meal, but everything served was just cold.. except the coffee maybe. Even in so-called VIPorter seats, space is cramped and trays are so tiny, you can barely setup your food. Flight caught up during the coast-to-coast crossing and was able to recoup about 45 min from the delay.. still arrived very late in Vancouver and had to wait a long time to get our registered bags. Let's see how the return flight will be in a few days..

6.0 GoodBeat, Jan 2026
YUL - YVR
Read more Porter Airlines reviews

The Flight took off 2hrs late because there was no pilot showing up when the flight was ready to board.. Though the cabin crew was present and had prepared the plane, the FO turned around after 15 min and went away. A crew to fly the plane finally arrived over an hour later and we were able to board 1h30 min later than planned time... until everything was loaded, we left 2h late from the gate. This was a small plane, so don't expect any Entertainment... Wi-Fi access on board would work, but took an awful amount of time to figure out and get it work (I'm an IT person). Flying as VIPorter customer, I was expecting at least some warm meal, but everything served was just cold.. except the coffee maybe. Even in so-called VIPorter seats, space is cramped and trays are so tiny, you can barely setup your food. Flight caught up during the coast-to-coast crossing and was able to recoup about 45 min from the delay.. still arrived very late in Vancouver and had to wait a long time to get our registered bags. Let's see how the return flight will be in a few days..

The flight booking code given by Kayak was not the correct one used by the airline. I had to call to get the correct one. It was never sent to me. Totally unacceptable!

It was okay. Had a thing with the front desk, she had me repack my suitcases to have them be under the weight restrictions, but then the other one was overweight, she argued with me about it when there were tons of people in line. Wasn’t great.

Due to a known technical error that Porter has not fixed in over a year, I was unable to check in the children on my reservation online and had to do it at the airport. Upon check in, there were no seats together, which was an issue as we had young children. The gate agent did manage to seat us together by moving other passengers, which was appreciated, but the other passengers were never informed, leading to confusion and delay upon boarding. The flight was over an hour late; no explanation or apology was ever issued. The bags on Porter take a long time to arrive--over half an hour at Hamilton on my inbound flight, and not much better on my return to Edmonton.

On my e-boarding pass it shows free wifi, yet the plane I was on didn’t have wifi. Please remove false advertising from your website and boarding passes

3.5 hr delay for a 1 hr work flight. No information as to why the delay until 20 mins before boarding.

Organization and the adjusted times but the snacks could be of a bigger portion

Smaller plane. Food and bar service for free is amazing. Drinks were in glass not plastic cups.

Poor landing as we overshot the runway and had to re land the plane. Lost both of my luggage not found as of yet. Had to pay extra money for my luggage in USD, now great my luggage is gone. Will not fly with Porter again.

This flight to St. Johns was really good. Boarding was a breeze. We left spot on time. Seats were actually pretty good. Recliner further than I expected. Three more flights to go we will see if this is the status quo for Porter.👍

Good crew. Boarding delays. Almost two hours wait for the bags in DC.

Unfortunately weather delayed our flight waiting for our plane to arrive and due to a little snow time was needed to deice the plane so departure was very delayed and I missed the connecting flight

It was great. There were some issues prior to takeoff. The weather was poor so we had to go through deicing, and we were delayed a bit by the pilots' concern about one of the engines, but that's aviation. The pilots handled everything with aplomb, and kept us apprised

The seats were comfortable and we had leg room. Great entertainment.

The flight crew where really good. Better then the crew from BNE to SFO

Safe made to destination. Late to start at GVA for icy reasons but we fought our next fly.

Miserable. They moved my seat, but canceled the next leg of my flight. I resolved the issue at my transfer, but that resulted in lost luggage that has taken days off my schedule with no resolution. Worse, they fail to interface effectively with Lufthansa, forcing me to bounce between two equally useless help desks. The apps are unable to handle the situation, the bag dropped off the tracker, and while the call centers are polite, they do not provide written information to assist with cross-airline communication.

l really enjoy very much the flight was very pleasant

The flight was delayed for 1:30 hours for maintenance issues. They should give more information about connecting flights. For a Business Cabin the Crew was mediocre.

The food is terrible. The same pasta or chicken with bad taste and presentation

It was a very small plane and was ok. No food or entertainment so there should be an option for NA.

We were happy with the service and cost of checking a bag

Flying with Air Canada is still better than the discount airlines like Flair. The seats are more comfortable and the on-board entertainment is better, with each seat having a built in screen and lots of content to watch. Onboard WIFI is also great to have, as well as plugs for charging. I think passengers in general are getting better at not bringing too much luggage onboard, and Air Canada is better at managing this without customers feeling like they are being taken advantage of with extra fees. I have travelled on different airlines and all seem to be loading faster, with fewer people bringing both a carry on and a personal item. Now I just bring one item and it fits under the seat so I don't need to worry about finding a place in the overhead bins. Overall, across the industry, asking customers to pay for carry on baggage is fair because it allows customers to only pay for what they need, and it helps to keep the planes on time. Kudos to Air Canada for its approach - the desired result is achieved without customers feeling that they are being surprised and caught with unexpected extra fees.

Due to the strike by AC flight attendants, my flight was cancelled. Very disappointing! A refund is being processed. This was not a Kayak issue. I will be sure to come back to Kayak in the future.

Biggest problem for me is that I am Star Alliance Gold and they were not able to give me access to to Maple Lounge because of some computer glitch . It was management by information system. She could clearly see my status and still would not give me access because the computer woudl not let her. She should have override that be attentive to a customer and figure rhat out later

Economy seats always cramped, no meal on international flight, no plugs for electronics, but we got there and cabin crew was excellent.

Flight got canceled last minute and rescheduled 3 days later, as if we do not have jobs and children to return to. 5+ hours on hold with customer support with no answer. We booked a different airline and spent 3x as much to escape Montreal bc of Air Canada. Still haven’t heard from them. Boooo

Pros: The airplane was new and had in-flight entertainment (tablet behind seats) with new movies instead of watching on personal devices. Cons: the flight time was changed without informing us. When I booked the flight, the time was 13:30pm (also in the email confirmation). However, when I reached the airport, the time was conveniently changed to 14:55pm. When I asked at the counter, they said the flight always took off at this time. The booking was made by Air Canada, but the flight was operated by United.

Staff was very courteous and kept things organized. We will definitely use Air Canada for further travel

Great flights. 90 minute departure delay for maintenance issues, not a great start but, afer that very good. Didn't pay extra for seats and lucked into a window and an aisle seat. Price was excellent at the super low economy level.

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

Information on your arrival and departure airports