YOW - WAS

C$ 237 Find Cheap Flights from Ottawa to Washington, D.C. – 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 Washington, D.C. departing on 24/8. 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.
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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$ 442
Typical prices: C$ 452-C$ 553
Air Canada
Fri 4/9Sun 6/9
YOW - DCA • Direct
Advice from real travellers
AI-powered summary based on content written by travel experts. AI can make mistakes.
Air Canada Preferred Economy and United Economy Plus add extra legroom for a fee.
For Washington, DCA is closest to downtown; buy United Priority Boarding for bin space.
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 Air Canada and United Airlines. Average duration is 1h 41m
Direct flights
Direct flights
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Direct flights
Direct flights
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Top routes
Cheapest • 9% average savings
Most popular
Insights
Insights
Insights
Insights
Top layover airports
Cheapest • Avg C$ 452 (round-trip)
Shortest trip • 3h 54m (one-way)
Insights
Insights
Insights
Insights
When to travel
Cheapest • 18% price drop
Most popular
Good to know
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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.

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
Thu, 20 Aug - Sun, 23 Aug
Air Canada Logo
9:05 a.m. - 3:38 p.m.
YOW
-
DCA
6h 33m
1 stop
Air Canada Logo
6:00 a.m. - 9:39 a.m.
DCA
-
YOW
3h 39m
1 stop
C$ 441Air Canada
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$ 441Porter Airlines
Fri, 4 Sep - Sun, 6 Sep
Air Canada Logo
10:40 a.m. - 12:14 p.m.
YOW
-
DCA
1h 34mdirect
Air Canada Logo
12:55 p.m. - 2:26 p.m.
DCA
-
YOW
1h 31mdirect
C$ 442Air Canada
Sun, 13 Sep - Sun, 20 Sep
Air Canada Logo
10:40 a.m. - 12:14 p.m.
YOW
-
DCA
1h 34mdirect
Air Canada Logo
12:55 p.m. - 2:27 p.m.
DCA
-
YOW
1h 32mdirect
C$ 450Air 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
Wed, 2 Sep - Mon, 7 Sep
United Airlines Logo
2:52 p.m. - 4:35 p.m.
YOW
-
IAD
1h 43mdirect
United Airlines Logo
10:10 p.m. - 11:54 p.m.
IAD
-
YOW
1h 44mdirect
C$ 487United Airlines
Fri, 2 Oct - Mon, 5 Oct
Multiple Airlines Logo
6:25 p.m. - 10:45 a.m.
YOW
-
IAD
16h 20m
1 stop
Multiple Airlines Logo
3:50 p.m. - 8:05 a.m.
IAD
-
YOW
16h 15m
1 stop
C$ 487Multiple Airlines
Wed, 30 Sep - Thu, 1 Oct
United Airlines Logo
3:10 p.m. - 10:59 p.m.
YOW
-
IAD
7h 49m
1 stop
United Airlines Logo
8:15 a.m. - 9:56 a.m.
IAD
-
YOW
1h 41mdirect
C$ 492United Airlines
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.?

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. departing in October.

Flight prices are typical for this route right now.

Flights to Washington, D.C. from Ottawa usually cost between C$ 403 and C$ 596 in October.
The lowest price found in the past 5 days was C$ 439 on Porter Airlines (2 Oct–4 Oct).

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$ 391 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, 9% 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., Saturday is the cheapest day to fly on average and Sunday is the most expensive. Flying from Washington, D.C. back to Ottawa, the best deals are generally found on Friday, with Wednesday 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 January, where tickets cost C$ 466 (return) on average. On the other hand, the most expensive months are May and September, where the average cost of round-trip tickets is C$ 622 and C$ 603 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$ 613, prices are generally cheapest when you fly direct.

Expert advice

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

 
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, DCA 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

February

Cheapest flight

C$ 237
Best time to beat the crowds (3% less expensive on average)
Most popular time to fly (4% more expensive on average)
Flight from Ottawa to Washington Dulles Airport

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 5 days, the lowest price for a flight from Ottawa to Washington, D.C. 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, 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 WestJet 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 Embraer 175 (Enhanced Winglets) 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$ 421 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$ 597 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$ 329 or less one-way and C$ 626 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.
8.0
Porter AirlinesOverall score based on 449 reviews
8.0Comfort
7.5Food
8.6Crew
6.9Entertainment
8.2Boarding
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.

Crew were welcoming, accommodating and they worked hard to find places for all carry on.

very average service no complimentary alcoholics drinks unlike other airlines such as Porter airlines No decent seats available during check-in time the day before

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

I dread trans-Pacific flights. They are very long. This was my first time on Universal, and it was my best crossing ever. The staff were professional, the hospitality was great, and the food was delicious. The entertainment system filled the long flight hours. I will seek out Universal flights from now onwards. 🙂

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

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

lots of delays the crew were unclear about where to pick up my carry-on, which they took from me to check in on the plane.

My connecting gate in .Chicago was across the aisle from my arriving gate. Otherwise I would not have made my connection. So that was very fortunate.

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😍👍.

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

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 .

So we didn't actually go. We were hoping to go for the Inauguration of the first female president. When That Guy got elected, we bailed. Unfortunately, we got basically none of our money back, despite having travel insurance. Would not fly with Air Canada again unless I had to.

This was my first time flying on Air Canada and the experience was good and pleasant enough, great crew members and the price I paid was amazing,

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

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

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

Information on your arrival and departure airports