YOW - IAD

C$ 237 Find Cheap Flights from Ottawa to Washington Dulles Airport – Compare and Save

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 25/9. 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

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Everything you should know

Cheapest round-trip
C$ 439
Typical prices: C$ 498-C$ 579
Porter Airlines
Fri 16/10Mon 19/10
YOW - IAD • 1 stop
Cheapest direct flights
C$ 486
Typical prices: C$ 589-C$ 823
United Airlines
Fri 21/8Wed 26/8
YOW - IAD • Direct
Advice from real travellers
AI-powered summary based on content written by travel experts. AI can make mistakes.
United Economy Plus adds 15 cm legroom; Air Canada sells extra legroom seats.
United Priority Boarding helps secure carry-on space; Ottawa has quick security.
Expert advice
Expert advice
Expert advice
Expert advice
Top airlines
Cheapest • from C$ 439 (round-trip)
Best reviews • 8.0 score
Airline reviews
Airline reviews
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Airline reviews
Airline reviews
+1
Direct flights
You can fly direct with United Airlines. Average duration is 1h 43m
Direct flights
Direct flights
+1
+1
Direct flights
Direct flights
+1
When to travel
Cheapest • 24% price drop
Most popular
Good to know
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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

Fri, 16 Oct - Mon, 19 Oct
Porter Airlines Logo
10:40 a.m. - 3:10 p.m.
YOW
-
IAD
4h 30m
1 stop
Porter Airlines Logo
3:50 p.m. - 9:42 p.m.
IAD
-
YOW
5h 52m
1 stop
C$ 439Porter Airlines
Fri, 2 Oct - Sun, 4 Oct
Porter Airlines Logo
10:40 a.m. - 3:10 p.m.
YOW
-
IAD
4h 30m
1 stop
Porter Airlines Logo
3:50 p.m. - 8:02 p.m.
IAD
-
YOW
4h 12m
1 stop
C$ 439Porter Airlines
Fri, 4 Sep - Sat, 5 Sep
Porter Airlines Logo
10:40 a.m. - 3:10 p.m.
YOW
-
IAD
4h 30m
1 stop
Porter Airlines Logo
11:25 a.m. - 7:07 p.m.
IAD
-
YOW
7h 42m
1 stop
C$ 440Porter Airlines
Fri, 4 Sep - Sun, 6 Sep
Air Canada Logo
12:25 p.m. - 5:08 p.m.
YOW
-
IAD
4h 43m
1 stop
Air Canada Logo
5:40 p.m. - 9:52 p.m.
IAD
-
YOW
4h 12m
1 stop
C$ 457Air Canada
Fri, 2 Oct - Sun, 4 Oct
Air Canada Logo
12:15 p.m. - 4:38 p.m.
YOW
-
IAD
4h 23m
1 stop
Air Canada Logo
5:15 p.m. - 9:52 p.m.
IAD
-
YOW
4h 37m
1 stop
C$ 460Air Canada
Tue, 29 Sep - Sun, 4 Oct
Air Canada Logo
12:15 p.m. - 4:38 p.m.
YOW
-
IAD
4h 23m
1 stop
Air Canada Logo
5:15 p.m. - 9:52 p.m.
IAD
-
YOW
4h 37m
1 stop
C$ 460Air Canada
Fri, 4 Sep - Sun, 6 Sep
Multiple Airlines Logo
10:00 a.m. - 11:44 a.m.
YOW
-
IAD
1h 44mdirect
Multiple Airlines Logo
5:40 p.m. - 9:52 p.m.
IAD
-
YOW
4h 12m
1 stop
C$ 471Multiple Airlines
Fri, 11 Sep - Fri, 18 Sep
Multiple Airlines Logo
6:00 a.m. - 7:43 a.m.
YOW
-
IAD
1h 43mdirect
Multiple Airlines Logo
5:20 p.m. - 9:52 p.m.
IAD
-
YOW
4h 32m
1 stop
C$ 471Multiple Airlines
Fri, 11 Sep - Fri, 18 Sep
United Airlines Logo
6:00 a.m. - 7:43 a.m.
YOW
-
IAD
1h 43mdirect
United Airlines Logo
8:15 a.m. - 9:56 a.m.
IAD
-
YOW
1h 41mdirect
C$ 486United Airlines
Fri, 21 Aug - Wed, 26 Aug
United Airlines Logo
7:30 p.m. - 9:14 p.m.
YOW
-
IAD
1h 44mdirect
United Airlines Logo
8:15 a.m. - 9:56 a.m.
IAD
-
YOW
1h 41mdirect
C$ 486United 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.

How much is a round-trip flight from Ottawa to Washington, D.C. Dulles Intl Airport?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Ottawa to Washington, D.C. Dulles Intl Airport departing in October.

Flight prices are below average for this route right now.

Flights to Washington, D.C. Dulles Intl Airport from Ottawa usually cost between C$ 565 and C$ 791 in October.
The lowest price found in the past 5 days was C$ 439 on Porter Airlines (2 Oct–4 Oct).

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 Saturday and avoid Sundays 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 Wednesdays.

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 January, where tickets cost C$ 429 (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$ 740 and C$ 691 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$ 473 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 season

January

Cheapest flight

C$ 237
Best time to beat the crowds (25% less expensive on average)
Most popular time to fly and prices are also 11% 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 5 days, the lowest price for a flight from Ottawa to Washington, D.C. Dulles Intl Airport was C$ 237 for a one-way ticket and C$ 439 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 WestJet 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$ 429 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$ 579 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$ 328 or less one-way and C$ 693 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 449 reviews
6.9Entertainment
7.5Food
8.0Comfort
8.2Boarding
8.6Crew
Airline reviews

Look, I understand that Kayak doesn't know I cancelled my flight on Porter. So I didn't actually fly yesterday. My main disappointment is with Porter ticket fare policies, and maybe you can pass this on to them: At my employer's request, I had booked a full fare ticket with no change fees since my trip to Toronto would likely be extended. Indeed, when I went to change my flight home to a later date, I was told the Fare Difference would cost an additional $550. So much for no change fees lol! While I had the agent on the line, I hopped over to Kayak, searched for new flights on the date in question, and saw a one-way ticket that got me home for only $355. So I got reimbursed about $450for the unused half of my roundtrip and bought a new ticket for $355. What good is a full fare / no change fee ticket if they screw you with "fare difference" BS. I'm still flying home on Porter Airlines but they just lost a hundred bucks with their stupid shenanigans.

4.0 OkayJeff, Jul 2026
YYZ - SFO
Read more Porter Airlines reviews

Look, I understand that Kayak doesn't know I cancelled my flight on Porter. So I didn't actually fly yesterday. My main disappointment is with Porter ticket fare policies, and maybe you can pass this on to them: At my employer's request, I had booked a full fare ticket with no change fees since my trip to Toronto would likely be extended. Indeed, when I went to change my flight home to a later date, I was told the Fare Difference would cost an additional $550. So much for no change fees lol! While I had the agent on the line, I hopped over to Kayak, searched for new flights on the date in question, and saw a one-way ticket that got me home for only $355. So I got reimbursed about $450for the unused half of my roundtrip and bought a new ticket for $355. What good is a full fare / no change fee ticket if they screw you with "fare difference" BS. I'm still flying home on Porter Airlines but they just lost a hundred bucks with their stupid shenanigans.

I flew with Porter yesterday and overall had a positive experience. The flight was delayed, but the airline did a good job keeping passengers informed with frequent updates throughout the process. My biggest challenge was actually in Terminal 3, where the speaker system wasn’t very clear. It was often difficult to hear the announcements, which made it harder to follow updates at the gate. On board, the experience improved significantly. The aircraft felt very new and well maintained, and the seats were surprisingly comfortable for a short-haul flight. One of the flight attendants seemed a little disengaged, but the other was excellent—friendly, professional, and a pleasure to interact with. Despite the delay, the comfortable aircraft, clear communication from Porter, and positive onboard service made for a good overall experience.

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.

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

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.

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

Due to mechanical problems it was delayed causing problems the actual flight. Was fune

Delayed by 2.5 hours. This happened previously on my flight from YOW to YVR on Dec. 26.2023. This is a terrible airline. The reason was there was lack of ground crew. This is a known event. AVOID PORTER AIRLINES IF YOU CAN. There is a reason half the plane was empty.

Flight Ottawa to Toronto canceled and no crew was available to direct me on what to do. I opened a file and I wait to be compensated.

Porter, like most airlines, need to improve their baggage policies. In reality, there are no longer 'cheap flights' because passengers pay exorbitant baggage fees.

Entertainment center did not work and no electric available at seat for 11 hour flight. Didn’t have access to overhead light or call button. Food was tasteless and had a high salt (27 %) of recommended daily salt intake

What would be infinitely better if for Kayak to not offer this flight as if it was completely different airlines rather than United and then filtering me through some creepy discount site.

Our flight was great with an unexpected upgrade. However, four days into our travel we are still without a piece of luggage. The bag tracker has not been accurate, the airline is not communicating with me or the luggage delivery service and no one is willing to take responsibility or guarantee any kind of support or reimbursement. Unfortunately, we do not have the option to easily shop to replace items as we are currently on a cruise. I have been very disappointed by United Airlines response.

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

l really enjoy very much the flight was very pleasant

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

Very nice and clean plane. Transit time between flights was tight though

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

Airline staff was good the checkin process was ok but the plane itself was very bad the comfort was worst it was worst and the most stiff 5 hours of my life i felt claustrophobic

Brutal as can be … delayed by 24 hours then delayed and hour on the tarmac then delayed three hours in Chicago, screaming child behind me kicking the seat for the better part of 10 hours… couldn’t be worse

The flight was good. My luggage didn’t land with me when I arrived in Columbus. So grateful I was able to get my luggage back within the 2 hours😍👍.

My flight got delayed 5 times and then got cancelled eventually, I had to get a hotel and uber and pay for food for an extra night without any plans. It was a horrible experience, instead of Air Canada, I was flying with United .

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

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

We had no idea that you had to check in with United so we were waiting at a closed Air Canada window for about an hour before we found out we had to us United.

Boarding staff provided up-to-date flight information. They were professional and courteous. The flight was on-time and comfortable (adequate leg room). Early landing and orderly exited the aircraft. Ground baggage handlers were quick to offload carry-on bags. GREAT EXPERIENCE WITH HK EXPRESS

The flight had maintenance issues eventually resulting in cancelation. Additionally, the staff on the ground was not helpful to assist with rebooking the flights resulting in an overall unpleasant experience and we missed a family wedding due to the cancelation.

Crew were fabulous, motivated and sincere in their connections. The chairs need reupholster as they have lost their stuffing lol Food was meh. Most of us have to eat healthy these days. Really impressed with the staff

It is air Canada so leaving 20 minutes late is very acceptable

The flight boarded on time but took off 45 minutes late. The flight crew was rummaging through the luggage compartment trying to find a suitcase to return to a customer who wasn't able to make it to the boarding gate on time. This seemed like a strange thing to do. I don't understand why the customer's luggage wasn't just sent to their final destination instead of inconveniencing 100 other people on that flight. I was able to make my connecting flight but it was an uncomfortably close near miss!

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

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