YOW - IAD

C$ 202 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 30/1. 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$ 376
Overall average: C$ 596
Porter Airlines
Mon 26/1Fri 6/2
YOW - IAD • 1 stop
Cheapest direct flights
C$ 460
Typical prices: C$ 516-C$ 714
Air Canada
Thu 15/1Mon 19/1
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$ 411 (round-trip)
Porter Airlines
Best reviews • 8.0 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to travel
April
Cheapest • 22% price drop
December
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Start a new search
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
Booking Insights
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

Mon, 26 Jan - Fri, 6 Feb
Porter Airlines Logo
7:00 a.m. - 10:19 a.m.
YOW
-
IAD
3h 19m1 stop
Porter Airlines Logo
11:40 a.m. - 3:04 p.m.
IAD
-
YOW
3h 24m1 stop
C$ 376Porter Airlines
Thu, 8 Jan - Mon, 26 Jan
Multiple Airlines Logo
4:20 p.m. - 7:55 a.m.
YOW
-
IAD
15h 35m1 stop
Multiple Airlines Logo
1:31 p.m. - 5:13 p.m.
IAD
-
YOW
27h 42m1 stop
C$ 380Multiple Airlines
Mon, 12 Jan - Wed, 14 Jan
Porter Airlines Logo
7:00 a.m. - 10:19 a.m.
YOW
-
IAD
3h 19m1 stop
Porter Airlines Logo
11:35 a.m. - 5:29 p.m.
IAD
-
YOW
5h 54m1 stop
C$ 381Porter Airlines
Mon, 12 Jan - Mon, 19 Jan
Porter Airlines Logo
7:00 a.m. - 10:19 a.m.
YOW
-
IAD
3h 19m1 stop
Porter Airlines Logo
11:35 a.m. - 5:29 p.m.
IAD
-
YOW
5h 54m1 stop
C$ 385Porter Airlines
Fri, 16 Jan - Fri, 23 Jan
Porter Airlines Logo
7:00 a.m. - 10:19 a.m.
YOW
-
IAD
3h 19m1 stop
Porter Airlines Logo
11:35 a.m. - 3:04 p.m.
IAD
-
YOW
3h 29m1 stop
C$ 394Porter Airlines
Thu, 8 Jan - Mon, 26 Jan
Multiple Airlines Logo
4:20 p.m. - 7:55 a.m.
YOW
-
IAD
15h 35m1 stop
Multiple Airlines Logo
5:33 p.m. - 5:13 p.m.
IAD
-
YOW
23h 40m2 stops
C$ 410Multiple Airlines
Mon, 26 Jan - Thu, 5 Feb
Porter Airlines Logo
7:00 a.m. - 10:19 a.m.
YOW
-
IAD
3h 19m1 stop
Porter Airlines Logo
11:40 a.m. - 3:04 p.m.
IAD
-
YOW
3h 24m1 stop
C$ 411Porter Airlines
Fri, 27 Feb - Sat, 7 Mar
Porter Airlines Logo
1:20 p.m. - 5:14 p.m.
YOW
-
IAD
3h 54m1 stop
Porter Airlines Logo
1:45 p.m. - 5:29 p.m.
IAD
-
YOW
3h 44m1 stop
C$ 414Porter Airlines
Thu, 8 Jan - Sun, 11 Jan
Porter Airlines Logo
7:00 a.m. - 10:19 a.m.
YOW
-
IAD
3h 19m1 stop
Porter Airlines Logo
11:35 a.m. - 3:04 p.m.
IAD
-
YOW
3h 29m1 stop
C$ 416Porter Airlines
Fri, 16 Jan - Fri, 16 Jan
United Airlines Logo
9:45 a.m. - 11:49 a.m.
YOW
-
IAD
2h 04mdirect
United Airlines Logo
5:50 p.m. - 1:32 p.m.
IAD
-
YOW
19h 42m2 stops
C$ 418United 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 Thursdays 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$ 428 (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$ 727 and C$ 721 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$ 486 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.
Airlines
Air Canada

Air Canada offers priority check-in for higher fare classes, saving time for business travelers.


Preferred Economy seats offer extra legroom for a fee, enhancing comfort on short flights.

United Airlines

United's Economy Plus offers 15 cm more legroom, ideal for short-haul comfort.


United's Priority Boarding ensures carry-on space, useful for business travelers.

Airports
YOW

Ottawa airport offers quick security lines due to low flight volume. Check estimated wait times online to plan your arrival.

IAD

The Silver Line Metro connects Dulles to D.C. city centre in about 50 minutes. Check schedule as it doesn't run 24 hours.

Our travel experts
Stefanie Waldek

Stefanie Waldek

Expert on Air Canada, United Airlines and IAD

Stefanie Waldek

Stefanie Waldek

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.

Read more
Mark Stachiew

Mark Stachiew

Expert on YOW

Mark Stachiew

Mark Stachiew

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.

Read more

Good to know

Low seasonSeptember
Cheapest flightC$ 202
Best time to beat the crowds but there is an average 31% increase in price.
Most popular time to fly (3% 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$ 202 for a one-way ticket and C$ 376 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$ 415 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$ 632 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$ 345 or less one-way and C$ 531 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.
8.0
Porter AirlinesOverall score based on 399 reviews
7.0Entertainment
8.2Boarding
7.6Food
7.9Comfort
8.6Crew
Airline reviews

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

6.0 GoodAnonymous, Dec 2025
YUL - YTZ
Read more Porter Airlines reviews

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.👍

I was not happy with AirfareAssist, the agency that kayak advised me would be handling my booking. I was advised by porter airlines that I had been overcharged for the Basic express , a option that I had asked airfare assist to help arrange after I realized that the basic fare I had chosen with porter did not include a carryon. At each checkin porter advised I had been overcharged for this . They advised that money would be refunded to my credit card, however, this is not likely to happen as it is not my name and credit card that appeared on the porter invoice, but that of another individual/agent. When airfare assist was arranging the basic express with porter on my behalf, they asked me to confirm that I agreed to pay $263 USD for this. I did agree, as I was advised this was needed to proceed. When I checked the invoice on the porter website and saw that it was not my name and credit card on the invoice, I was advised that this was how airfareassist processed the payment. The Porter invoice indicated a billed amount of $126USD I will not use Kayak or their designated AirfareAssist again

Our flight was delayed by a bit. I appreciated that we were kept informed on why periodically. Boarding was fine. I overheard one flight attendant sounding very rude to a passenger who was not paying attention to the safety demonstration. The snacks were minimal as it was a short flight. There was no entertainment. Overall the flight was good back to LGA.

There was a 5 hour delay. Missed connection and now an almost 21 hour lay over!

The flight was fine see earlier note for the problem

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

It was probably one of the worst flights I’ve been on. The restrooms were never cleaned or stocked. The food was very subpar, and i usually enjoy airline food, so I was disappointed. It was just all around a bad experience. The only saving grace was the flight attendants.

The only downside was my cell phone charger wouldn’t work in the charging port but everyone else’s would work in them all. My cell phone cable works fine in my hotel room in Frankfurt.

Great crew, excellent landing, good food. Over all great experience. Thank you!

One bag is incorrect and not acceptable for an international flight. The food was not just good. I won't fly with them again.

Not pleasant trip cross country when the entertainment and WiFi system not working. No entertainment for entirety of route. Staff was rather nonchalant in that they dismissed the problem due to age of plane. It would have been nice to know this up front so I could have come prepared to read or download movies before boarding Coincidentally or not, there was a similar issue with the entertainment system on my previous flight I took on my fist leg of the trip. There are no seat TVs, so you must rely on the app when it works. United can do better. Also, what use it it to pay for boarding group 2 when half of the passengers are in the same line as you?

Crew was dismissive. Snacks and refills not offered. Poor business class experience. Bed not comfortable compared to Emirates or BA.

Flight was delayed for 5 hours because crew didn’t have enough time to rest - this seems like it could have been avoided with better scheduling. Food was not good.

IAD with the archaic people movers is just a place to be avoided.

Overall, it was good. I was seating next to a wonderful lady and did not notice how time flew. Thanks

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.

Just a little improvement on food but everything is excellent

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

Information on your arrival and departure airports