IAD - YOW

$120 Find Cheap Flights from Washington Dulles Airport to Ottawa

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Dulles Intl to Ottawa departing on 11/13. 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 Ottawa

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

Cheap Flights from Dulles Intl to Ottawa (IAD-YOW)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Dulles Intl to Ottawa 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 Dulles Intl to Ottawa

Mon, Feb 9 - Sat, Feb 21
Multiple Airlines Logo
3:37 pm - 11:58 pmIAD-YOW
8h 21m1 stop
Multiple Airlines Logo
8:40 am - 12:29 pmYOW-IAD
3h 49m1 stop
$284Multiple Airlines
Find Deal
Thu, Nov 27 - Thu, Dec 4
Porter Airlines Logo
11:40 am - 7:54 pmIAD-YOW
8h 14m1 stop
Porter Airlines Logo
6:50 am - 10:24 amYOW-IAD
3h 34m1 stop
$289Porter Airlines
Find Deal
Thu, Nov 20 - Sun, Nov 23
Porter Airlines Logo
6:30 pm - 10:29 pmIAD-YOW
3h 59m1 stop
Porter Airlines Logo
1:20 pm - 5:14 pmYOW-IAD
3h 54m1 stop
$290Porter Airlines
Find Deal
Wed, Nov 19 - Thu, Nov 20
Porter Airlines Logo
6:30 pm - 10:29 pmIAD-YOW
3h 59m1 stop
Porter Airlines Logo
6:50 am - 10:24 amYOW-IAD
3h 34m1 stop
$291Porter Airlines
Find Deal
Thu, Nov 20 - Mon, Nov 24
Porter Airlines Logo
6:30 pm - 10:29 pmIAD-YOW
3h 59m1 stop
Porter Airlines Logo
1:20 pm - 5:14 pmYOW-IAD
3h 54m1 stop
$296Porter Airlines
Find Deal
Mon, Dec 8 - Wed, Dec 10
Porter Airlines Logo
11:40 am - 3:04 pmIAD-YOW
3h 24m1 stop
Porter Airlines Logo
6:50 am - 10:24 amYOW-IAD
3h 34m1 stop
$297Porter Airlines
Find Deal
Thu, Dec 11 - Thu, Dec 18
Porter Airlines Logo
6:30 pm - 10:29 pmIAD-YOW
3h 59m1 stop
Porter Airlines Logo
1:20 pm - 5:14 pmYOW-IAD
3h 54m1 stop
$302Porter Airlines
Find Deal
Mon, Dec 8 - Thu, Dec 11
Multiple Airlines Logo
5:45 am - 12:25 amIAD-YOW
18h 40m2 stops
Multiple Airlines Logo
6:50 am - 10:24 amYOW-IAD
3h 34m1 stop
$325Multiple Airlines
Find Deal
Thu, Nov 20 - Sun, Nov 23
Air Canada Logo
9:00 am - 1:18 pmIAD-YOW
4h 18m1 stop
Air Canada Logo
10:20 am - 3:46 pmYOW-IAD
5h 26m1 stop
$382Air Canada
Find Deal
Thu, Nov 20 - Sun, Nov 23
Air Canada Logo
10:12 pm - 11:54 pmIAD-YOW
1h 42mnonstop
Air Canada Logo
2:15 pm - 4:09 pmYOW-IAD
1h 54mnonstop
$383Air Canada
Find Deal

Everything you should know

Our travelers' advice
AI-generated summary based on content written by travel experts
Air Canada's Preferred Economy offers 34-inch legroom.
United's Economy Plus adds six inches of legroom.
Expert advice
Expert advice
Expert advice
Expert advice
Top airlines
Porter Airlines
Cheapest • from $289 (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 • 28% price drop
May
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Cheapest round-trip
$284
Overall average: $330
Multiple Airlines
Mon 2/9Sat 2/21
IAD - YOW • 1 stop
Cheapest non-stop
$383
Typical prices: $241-$649
Air Canada
Thu 11/20Sun 11/23
IAD - YOW • Non-stop
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We hope you love your trip to Ottawa!
Booking Insights

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

Get data-powered insights and trends into flights from Dulles Intl to Ottawa 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 Washington Dulles Airport to Ottawa?

The average price of all round-trip flights from Washington, D.C. Dulles Intl Airport to Ottawa clicked on KAYAK for each day over the last 12 months.

For Washington Dulles Airport to Ottawa, Saturday is the cheapest day to fly on average and Thursday is the most expensive. Flying from Ottawa back to Washington Dulles Airport, the best deals are generally found on Saturday, with Monday being the most expensive.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Washington, D.C. Dulles Intl Airport to Ottawa, 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 Washington, D.C. Dulles Intl Airport to Ottawa is April, where tickets cost $297 (return) on average. On the other hand, the most expensive months are May and September, where the average cost of round-trip tickets is $577 and $568 respectively.

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

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 $423 on average.

Expert advice

Expert advice for your flight from Dulles Intl to Ottawa

 
Snippets provided in this section are AI-generated based on a summarization of KAYAK-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.
KAYAK teamed up with top travel experts to share the best tips for your journey.
Airlines
Air Canada

Air Canada offers priority boarding for Business Class and elite status passengers, enhancing travel efficiency.


Air Canada's Preferred Economy seats offer up to 34 inches of legroom, ideal for added comfort.

Read more about Air Canadaby Stefanie Waldek
United Airlines

United's Economy Plus seats provide up to six inches more legroom than standard economy, enhancing comfort.


United offers Priority Boarding for Zone 2, ensuring overhead bin space for your carry-on.

Our travel experts
Stefanie Waldek

Stefanie Waldek

Expert on Air Canada and United Airlines

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

Good to know

Low seasonJanuary
Cheapest flight$120
Best time to beat the crowds but there is an average 5% increase in price.
Most popular time to fly with an average 39% increase in price.
Flight from Washington Dulles Airport to Ottawa

When to book flights from Dulles Intl to Ottawa

Are your dates flexible? Find out the best times to travel from Dulles Intl to Ottawa 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 Washington Dulles Airport to Ottawa flights

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

    In the last 3 days, the lowest price for a flight from Washington, D.C. Dulles Intl Airport to Ottawa was $120 for a one-way ticket and $284 for a round-trip.

  • Do I need a passport to fly between Washington Dulles Airport and Ottawa?

    A passport is required to fly from Washington Dulles Airport to Ottawa.

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

    Lufthansa, SWISS, United Airlines, and Air Canada offer inflight Wi-Fi service on the Washington Dulles Airport to Ottawa flight route.

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

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

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

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

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

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

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

    The two airlines most popular with KAYAK users for flights from Washington, D.C. to Ottawa are Porter Airlines and United Airlines. With an average price for the route of $331 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 $469 and an overall rating of 7.4.

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

    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 Washington Dulles Airport to Ottawa.

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

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

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

    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 Ottawa with an airline and back to Washington Dulles Airport with another airline. Booking your flights between Washington Dulles Airport and YOW can sometimes prove cheaper using this method.

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

    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 Ottawa from Washington Dulles Airport 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 Washington, D.C. Dulles Intl Airport to Ottawa

  • Looking for a cheap flight? 25% of our users found flights on this route for $584 or less one-way and $477 or less round-trip.

Prefer to fly direct from Washington Dulles Airport to Ottawa?

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

Direct departures

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 direct flights

Direct returns

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 direct flights

Reviews of the top 3 airlines serving from Dulles Intl to Ottawa

 
See real verified KAYAK customer reviews for airlines flying from Washington, D.C. to Ottawa. 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 Dulles Intl to Ottawa? 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 384 reviews
7.6Food
8.0Comfort
8.2Boarding
8.6Crew
7.0Entertainment
Airline reviews

I like it, but the food isn't good. They need to offer more simple things. This bowls that have so many things your don't know what your are eating. The milenials like it, no the rest. And last but not least, they allowed somebody have a huge dog, vey agressive and fidgety in the flight. That's horrible. No animals should be allowed inside the airplane, what about allergies, etc

8.0 ExcellentPilar, Oct 2025FLL - YOW
Read more Porter Airlines reviews

I like it, but the food isn't good. They need to offer more simple things. This bowls that have so many things your don't know what your are eating. The milenials like it, no the rest. And last but not least, they allowed somebody have a huge dog, vey agressive and fidgety in the flight. That's horrible. No animals should be allowed inside the airplane, what about allergies, etc

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

The flight was half empty yet they charged me $50 for a basic carry on! I saw how passengers of different colors were treated differently.

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

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

Three hours on the tarmac with almost zero communication from the cockpit. Not when offered a water in the interim. In my 67 years of flying all over the world the worst experience ever. The plane was half empty, however had to pay for seats to sit next to my girlfriend. Extra to take a carry on. I would never fly Porter again even for free.

All good the seats a little tight and no I pad screen

During booking, I kept trying submitting my payment from the Mexican website and it didn't work. After I had the idea to change it to the Canadian website, it worked but I had to be charged the equivalent of 50 CAD more. I received the clear instruction that I would only be able to check-in at the airport and that it was impossible to select a seat 24 hours before departure, that I had to pay 144 CAD to do so, although not only was I able to check-in 24 hours before departure, but I could have selected my seats for free then. All in all, I almost threw $200 out the window due to misleading information. Besides, the app kept crashing, the information to get to the gate on the app was inaccurate, my gate was switched and I was only informed once in the air (luckily I had noticed the departure pannel), I was not addressed in my language beforehand and even if I tried I was immediately answered in English (which meant the crew understood but didn't want to answer accordingly), there was only one snack & beverage service on my medium haul flight and no beverage service on my short haul flight. To be fair, the planes were comfortable, the crew apart from the language issue was helpful, dynamic and engaging, the plane was clean and the directions were clear and direct. United has a lot of potential to be one of my favourite airlines, but the devil is in the details and a lot of them missed the target.

Better WiFi. I cannot understand that in 2025, United is so behind on a technology that is now a necessity and still painfully unreliable, slow and keeps disconnecting.

Great service on board. Boarding a bit slow due to process. Food was pretty average.

Very small cramped plane for an international flight. Everything else was good, but it was maybe the smallest comfort-wise I've ever been on for longer than 3-4 hours and the trip was 7.5

Flight was delayed 3 hours. No food and drink vouchers was provided. They offered a mini pretzel bag and water .

Staff was rude. Didn’t give water for 2 hours. Worst service

Was on time until within 1 hour of flight-how does that happen? Staff very friendly.

I liked the choice of lemon ginger tea. I think stewardesses can be more considerate of older people needs.

We were given vouchers we couldn’t use with a 5.5 hour delay

I fly UAL 7-8 times per year. This flight was not up to snuff because it boarded very late "due to unexpected delays in restocking the plane" and yet Flight Aware showed the plane had landed some 10 hours earlier--so I think they could have planned accordingly. The FA's were nice but harried. The video system had to be rebooted 3-4 times. The food service was rather abrupt; they forgot my row and when I asked for my meal, they brought it with some impatience. Overall, the flight was fine, but the little details made it feel somewhat mundane and hurried.

Plane left an hour late, I missed my connection and my bow case was never even loaded on the plane in VA. I deal with this type of nonsense everytime I fly air canada.

Check in agent was very helpful and polite. He helped me board the earlier flight back home instead of waiting 2 hours at the airport for the next flight

Our flight was canceled at the last minute. Someone on the flight said the exact same thing happened to her the day before. I will say they helped us book a flight on another airline so that we could still make our vacation with little delay.

the seats aren't the most comfy -- too little padding and I could feel whatever the passenger behind me was doing. Otherwise, it's all good.

This flight didn't happen for me because of overbooking.

Everything was simple and easy. The lady at the gate was super friendly, I wish I had her name to share. She's a little older, dark-haired. You can tell she likes her job and would be a great influence on any young people training with her.

During the pre-departure safety briefing, the flight attendants rushed through the mandatory safety announcements in both official languages, making it difficult for passengers to clearly understand the instructions. Given the importance of these messages for passenger safety, this lack of clarity was concerning. Perhaps use a recoded message to alleviate this concern. Additionally, the flight attendants appeared to lack the professional attentiveness typically expected during a flight. Rather than focusing on timely and courteous service, they seemed more engaged in personal conversations than in addressing the needs of passengers. I hope this feedback is taken constructively and helps in maintaining the high standards of professionalism and care that travelers expect from a national carrier: AC.

Service is pretty good. Sandwiches have to be purchased but I’ve bought my own food. Seat was comfortable and various movies to chose from.

The flight was delayed at the last moment quoting an absurd weather reason. This delay led to an issue with my connecting flight. I was made to run (literary) from this flight to the next one ( as they preponed departure. I was still in my DCA to YYZ flight when the boarding started for the next connecting flight. After my sprint to get the connecting flight, found that no place for my carry on. Had to sit for 3 hours with my back-pack on my lap , it was the most uncomfortable and inconvenient journey with little to no empathy shown by cabin crew in both flights. Another poor show from Air Canada!! Cant help because of lack of options !!

One leg of the flight arrived late which necessitated a rebooking on the next leg. Although there were no major weather events in play, best choice offered was a 7 hour wait in the Vancouver airport for a 4 hour totally packed red eye flight to Ottawa. No opportunities to return earlier via other major hubs like Toronto or Montreal. Felt very much like national routes were no longer well supported. Adding insult to injury, entertainment system for my seat was out of order. Thought I might use wi-fi, but discovered it would cost $10 per hour! Paid a lot for the flight as it was over the holiday period. Probably won't be doing that again.

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