YOW - WAS

C$ 224 Find Cheap Flights from Ottawa to Washington, D.C.

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 Washington, D.C. departing on 30/10. 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

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

 
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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Flight Deals

Cheap Flights from Ottawa to Washington, D.C. (YOW-WAS)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Ottawa to Washington, D.C. 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 Washington, D.C.

Tue, 30 Sep - Fri, 3 Oct
Multiple Airlines Logo
4:25 p.m. - 3:29 p.m.YOW-BWI
23h 04m1 stop
Multiple Airlines Logo
8:21 a.m. - 12:22 a.m.BWI-YOW
16h 01m2 stops
C$ 416Multiple Airlines
Find Deal
Tue, 30 Sep - Fri, 3 Oct
Multiple Airlines Logo
4:25 p.m. - 3:29 p.m.YOW-BWI
23h 04m1 stop
Multiple Airlines Logo
8:52 p.m. - 4:57 p.m.BWI-YOW
20h 05m1 stop
C$ 419Multiple Airlines
Find Deal
Fri, 3 Oct - Sat, 4 Oct
United Airlines Logo
7:29 p.m. - 9:12 p.m.YOW-IAD
1h 43mdirect
United Airlines Logo
8:25 a.m. - 9:09 p.m.IAD-YOW
12h 44m2 stops
C$ 431United Airlines
Find Deal
Fri, 26 Dec - Wed, 31 Dec
Porter Airlines Logo
6:50 a.m. - 10:24 a.m.YOW-IAD
3h 34m1 stop
Porter Airlines Logo
11:40 a.m. - 5:29 p.m.IAD-YOW
5h 49m1 stop
C$ 435Porter Airlines
Find Deal
Thu, 30 Oct - Thu, 6 Nov
Porter Airlines Logo
8:40 a.m. - 5:14 p.m.YOW-IAD
8h 34m1 stop
Porter Airlines Logo
11:40 a.m. - 5:29 p.m.IAD-YOW
5h 49m1 stop
C$ 442Porter Airlines
Find Deal
Thu, 30 Oct - Thu, 6 Nov
Air Canada Logo
10:30 a.m. - 12:19 p.m.YOW-DCA
1h 49mdirect
Air Canada Logo
12:55 p.m. - 2:30 p.m.DCA-YOW
1h 35mdirect
C$ 443Air Canada
Find Deal
Thu, 30 Oct - Thu, 6 Nov
Air Canada Logo
10:30 a.m. - 12:19 p.m.YOW-DCA
1h 49mdirect
Air Canada Logo
6:00 a.m. - 12:22 p.m.DCA-YOW
6h 22m1 stop
C$ 446Air Canada
Find Deal
Fri, 3 Oct - Sat, 4 Oct
United Airlines Logo
7:29 p.m. - 9:12 p.m.YOW-IAD
1h 43mdirect
United Airlines Logo
6:15 a.m. - 12:16 p.m.IAD-YOW
6h 01m1 stop
C$ 467United Airlines
Find Deal
Fri, 10 Oct - Sun, 12 Oct
Lufthansa Logo
7:29 p.m. - 9:12 p.m.YOW-IAD
1h 43mdirect
Lufthansa Logo
6:15 a.m. - 11:45 a.m.IAD-YOW
5h 30m1 stop
C$ 478Lufthansa
Find Deal
Fri, 10 Oct - Sun, 12 Oct
Lufthansa Logo
7:29 p.m. - 9:12 p.m.YOW-IAD
1h 43mdirect
Lufthansa Logo
5:13 p.m. - 6:52 p.m.IAD-YOW
1h 39mdirect
C$ 479Lufthansa
Find Deal

Everything you should know

Our travellers' advice
AI-generated summary based on content written by travel experts
United's Economy Plus offers 15 cm more legroom.
DCA is the closest airport to downtown D.C., 6 km away.
Expert advice
Expert advice
Expert advice
Expert advice
Top airlines
United Airlines
Cheapest • from C$ 431 (round-trip)
Porter Airlines
Best reviews • 7.9 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Top routes
YOW-IAD
Cheapest • 2% average savings
YOW-IAD
Most popular
Insights
Insights
Insights
Insights
When to book
3 weeks
in advance
Our data shows that travellers who book at least 3 weeks in advance save around 36% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
March
Cheapest • 17% price drop
December
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Cheapest round-trip
C$ 416
Multiple Airlines
Tue 30/9Fri 3/10
YOW - BWI • 1 stop
Cheapest direct flights
C$ 443
Typical prices: C$ 463-618
Air Canada
Thu 30/10Thu 6/11
YOW - DCA • Direct
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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 Washington, D.C.!
Expert advice

Expert advice for your flight from Ottawa to Washington, D.C.

 
Snippets provided in this section are AI-generated based on a summarisation 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's Preferred Economy seats offer up to 10 cm extra legroom for a fee.


Air Canada offers priority check-in for higher fare classes and elite status passengers.

Read more about Air Canadaby Stefanie Waldek
United Airlines

United's Economy Plus offers up to 15 cm more legroom than standard economy seats.


Purchase Priority Boarding to avoid gate-checking your carry-on bag, placing you in Zone 2.

Airports
YOW

Ottawa airport offers quick security lines due to low flight volume, making it efficient for business travelers.

Read more about YOWby Mark Stachiew
DCA

DCA is the closest airport to downtown D.C., just 6 km away, making it very convenient for quick access.

Read more about DCAby Stefanie Waldek
IAD

The Silver Line Metrorail connects IAD to downtown D.C., taking about 55 minutes and costing $2-$6 (C$ 3–8).

Read more about IADby Stefanie Waldek
Our travel experts
Stefanie Waldek

Stefanie Waldek

Expert on Air Canada, United Airlines, DCA 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
Booking Insights

KAYAK's insights & trends for Ottawa to Washington, D.C. flights

Get data-powered insights and trends into flights from Ottawa to Washington, D.C. 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.?

What is the cheapest Ottawa to Washington, D.C. flight route?

Data is based on round-trip flight searches on KAYAK over the past month.

The absolute cheapest return flight from Ottawa to Washington, D.C. costs C$ 419 on the route between Ottawa (YOW) and Washington, D.C. Dulles Intl Airport (IAD). However, over the past month, flights between Ottawa (YOW) and Washington, D.C. Reagan-National Airport (DCA) were, on average, 2% cheaper than other Ottawa-Washington, D.C. routes. The most popular route is between Ottawa (YOW) and Washington, D.C. Dulles Intl Airport (IAD).

What’s the cheapest day of the week to fly from Ottawa to Washington, D.C.?

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

For Ottawa to Washington, D.C., Friday is the cheapest day to fly on average and Thursday is the most expensive. Flying from Washington, D.C. back to Ottawa, the best deals are generally found on Friday, with Sunday being the most expensive.

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

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., 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. is March, where tickets cost C$ 405 (return) on average. On the other hand, the most expensive months are September and October, where the average cost of round-trip tickets is C$ 658 and C$ 633 respectively.

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

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.

No, with an average price for the route of C$ 671, prices are generally cheapest when you fly direct.

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

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., 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., you should book around 3 weeks before departure, which saves you about 36% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 13 weeks before departure.

Good to know

Low seasonJanuary
Cheapest flightC$ 224
Best time to beat the crowds (14% less expensive on average)
Most popular time to fly (2% more expensive on average)
Flight from Ottawa to Baltimore

When to book flights from Ottawa to Washington, D.C.

Are your dates flexible? Find out the best times to travel from Ottawa to Washington, D.C. 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 flights from Ottawa to Washington, D.C.

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

    In the last 3 days, the lowest price for a flight from Ottawa to Washington, D.C. was C$ 162 for a one-way ticket and C$ 301 for a round-trip.

  • Which airports will I be using when flying from Ottawa to Washington, D.C.?

    Ottawa is served by only 1 airport and there are 2 airports in Washington, D.C.. You will leave Ottawa from Ottawa and you will be arriving in Washington, D.C. at one of these airports: Washington, D.C. Reagan-National or Washington, D.C. Dulles Intl.

  • Which airlines offer Wi-Fi service onboard planes from Ottawa to Washington, D.C.?

    Air Canada, and Cathay Pacific offer inflight Wi-Fi service on the Ottawa to Washington, D.C. flight route.

  • Which aircraft models fly most regularly from Ottawa to Washington, D.C.?

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

  • Which airline alliances offer flights from Ottawa to Washington, D.C.?

    Star Alliance is the only airline alliance operating flights between Ottawa and Washington, D.C..

  • On which days can I fly direct from Ottawa to Washington, D.C.?

    There are direct flights from Ottawa to Washington, D.C. 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$ 431 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$ 665 and an overall rating of 7.4.

  • How does KAYAK find such low prices on flights from Ottawa to Washington, D.C.?

    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, D.C..

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Washington, D.C. from Ottawa 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 Ottawa to Washington, D.C.?

    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, D.C. 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, D.C.?

    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, D.C. 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.

  • Looking for a cheap flight? 25% of our users found flights on this route for C$ 495 or less one-way and C$ 647 or less round-trip.

Prefer to fly direct from Ottawa to Washington, D.C.?

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

Direct departures

Ottawa to Washington, D.C.

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,United Airlines

Air Canada,United Airlines

Sunday

Air Canada,United Airlines

Air Canada,United Airlines

See more nonstop flights

Direct returns

Washington, D.C. to Ottawa

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,United Airlines

Air Canada,United Airlines

Sunday

Air Canada,United Airlines

Air Canada,United Airlines

See more nonstop flights

Reviews of the top 3 airlines flying from Ottawa to Washington, D.C.

 
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 Washington, D.C.? 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 363 reviews
7.9Comfort
7.6Food
8.6Crew
8.1Boarding
7.0Entertainment
Airline reviews

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.

2.0 MediocreAnonymous, Sep 2025YDF - YHZ
Read more Porter Airlines reviews

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.

The flight was fine see earlier note for the problem

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

Everything was good except the fact you charge more for a carry on bag vs a check in bag and to top it off in US$ that was not impressive

Our flight was cancelled at the last minute for maintenance reasons and we were rebooked on a late flight when we purposefully booked our flight to be home early due to work.

Seemed like an old plane. Very noisy. The seat cushions were so old that the metal bracing of the seats were poking through. There was plenty of leg room though.

Flight was delayed over 2 hours, then landed at a different airport!

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

My flight was delayed about 1 1/2 hours in Chicago, but other then that it was a good flight.

This is the best united airlines flight that I took. The crew was very friendly and the food was tasty!

It is clear that someone knew, and competent, is in charge of food at United Airlines at least for the international flights. I was flying in coach, but the choices of the dinner were excellent. Tasty, and appropriate size. I had the beef, which was a little bit like a shepherds pie, and it was good. Nothing comparable has been served on a United flight in years. It will not be confused with three star food, but it is very good for airline food. Even better was the breakfast choice between a cinnamon roll and a breakfast sandwich. I chose the breakfast sandwich which was absolutely delicious and which I would happily order again at my local Starbucks or Panera. It is clear that someone knew indifferent is in charge of the food and it’s about time.

Had one staff that was not pleasant. Seems they are stressed with too many people to care for.

I would have liked an opportunity to move to a different seat ( even would have checked in my hand luggage)as I had health issues where I didn't have to clamber over the passenger next to me to for toilet use/ movement [ She was a highly unpleasant neighbor to sit next to]. In addition, I found that my European phone plan had run out of data and so I was not receiving emails from yourselves on airport wifi to be able to check in online and verifications difficult as did not accept the ticket number I had. I asked for an extra blanket but was told there was none. Then I saw other passengers receiving them. I couldn't eat the food and asked for snacks : Stewardess said " on the way" but they did not bring. The best bit was the check in process in Lisbon. Very efficient. However, I did not understand why we had to collect our bags at Washington then go through customs again. It was not explained. I also with my leg and health issue had approximately mile walk to the gate ( which then changed) . There appeared to be no moving walkways or help provided.

The attendant were friendly. I suggest you have a medical attendant on board every flight so that in case someone is sick , he/she will help them.

We had a very long diversion and our food voucher didn’t work because the restaurants were closed

United airlines, mediocre at best. No issues , nothing great . Worked for me

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

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 .

They lost my checked in luggage, why do I pay for my cargo not arriving at the same destination as me?

Everything you need to know for your flight from Ottawa to Washington, D.C.

Information on your arrival and departure airports

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