C$ 203 Find Cheap Flights from Ottawa to Washington

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 departing on 15/8. 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.
1 adult

KAYAK searches hundreds of travel sites at once for deals on flights to Washington

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

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours

Seattle
Seattle1 stopC$ 348

Cheap Flight Deals from Ottawa to Washington (YOW-USWA)

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

Recent round-trip flight deals from Ottawa to Washington

Recommended round-trip deals departing in the coming months from the most popular airlines that fly from Ottawa to Washington.
Discover the best prices for you by selecting your travel dates on KAYAK.
Choose your dates
WestJet Logo
6:00 a.m. - 12:58 p.m.YOW-SEA
9h 58m1 stop
WestJet Logo
7:05 a.m. - 6:21 p.m.SEA-YOW
8h 16m1 stop
C$ 348WestJet
Find Deal
Wed, 28 May - Wed, 11 Jun
WestJet Logo
5:55 a.m. - 12:58 p.m.YOW-SEA
10h 03m2 stops
WestJet Logo
7:05 a.m. - 6:21 p.m.SEA-YOW
8h 16m1 stop
C$ 365WestJet
Find Deal
Wed, 28 May - Wed, 11 Jun
WestJet Logo
3:45 p.m. - 8:28 p.m.YOW-SEA
7h 43m1 stop
WestJet Logo
7:05 a.m. - 6:20 p.m.SEA-YOW
8h 15m1 stop
C$ 370WestJet
Find Deal
Sat, 30 Aug - Sun, 14 Sep
Air Canada Logo
5:15 a.m. - 10:45 a.m.YOW-SEA
8h 30m1 stop
Air Canada Logo
11:30 a.m. - 12:19 a.m.SEA-YOW
9h 49m1 stop
C$ 402Air Canada
Find Deal
Sat, 3 May - Wed, 7 May
 Logo
3:45 p.m. - 8:28 p.m.YOW-SEA
7h 43m1 stop
 Logo
7:05 a.m. - 12:21 a.m.SEA-YOW
14h 16m2 stops
C$ 416
Find Deal
Wed, 30 Apr - Wed, 7 May
 Logo
5:55 a.m. - 12:52 p.m.YOW-PDX
9h 57m2 stops
 Logo
5:40 p.m. - 6:45 a.m.PDX-YOW
34h 05m2 stops
C$ 418
Find Deal
Sat, 3 May - Wed, 7 May
Air Canada Logo
4:00 p.m. - 9:41 p.m.YOW-SEA
8h 41m1 stop
Air Canada Logo
6:00 a.m. - 6:09 p.m.SEA-YOW
9h 09m1 stop
C$ 419Air Canada
Find Deal
Wed, 16 Apr - Tue, 22 Apr
United Airlines Logo
5:15 a.m. - 10:45 a.m.YOW-SEA
8h 30m1 stop
United Airlines Logo
11:59 p.m. - 5:33 p.m.SEA-YOW
14h 34m1 stop
C$ 483United Airlines
Find Deal
Tue, 6 May - Mon, 12 May
United Airlines Logo
6:33 a.m. - 9:43 p.m.YOW-SEA
18h 10m2 stops
United Airlines Logo
2:14 p.m. - 2:27 p.m.SEA-YOW
21h 13m2 stops
C$ 495United Airlines
Find Deal
Wed, 30 Apr - Wed, 7 May
Delta Logo
6:00 a.m. - 12:10 a.m.YOW-PDX
21h 10m2 stops
Delta Logo
5:35 a.m. - 12:41 a.m.PDX-YOW
16h 06m2 stops
C$ 721Delta
Find Deal
Tue, 20 May - Wed, 28 May

KAYAK's insights & trends for Ottawa to Washington flights

Get data-powered insights and trends into flights from Ottawa to Washington to help you find the cheapest flights, the best time to fly and much more.

What is the cheapest time of day to fly to Washington?

The average price for all round-trip flights from Ottawa to Washington depending on the time of departure, clicked by users on KAYAK in the last 2 weeks.
The cheapest time of day to fly to Washington is generally at night, when round-trip flights cost C$ 429 on average. Morning departures are around 3% cheaper than evening flights, on average. The most expensive time of day to fly to Washington is generally in the afternoon, which is peak travel time and where the average cost of a ticket is C$ 500.

What is the cheapest month to fly from Ottawa to Washington?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Ottawa to Washington, 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 is October, when tickets cost C$ 575 (return) on average. On the other hand, the most expensive months are December and April, when the average cost of round-trip tickets is C$ 718 and C$ 715 respectively.

How far in advance should I book a flight from Ottawa to Washington?

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, 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, you should book around 2 weeks before departure. For the absolute cheapest price, our data suggests you should book 23 weeks before departure.

Good to know

Low season

February

High season

August

Cheapest flight

C$ 203
Best time to beat the crowds (7% less expensive on average)
Most popular time to fly and prices are also 9% lower on average.
Flight from Ottawa to Seattle

FAQs - booking Washington flights

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

    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.

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

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

    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 from Ottawa to Washington with an airline and back with another airline.

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

    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 from Ottawa to Washington up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

Top 3 airlines serving from Ottawa to Washington

 
See real verified KAYAK customer reviews for airlines flying from Ottawa to Washington. 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? 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.
7.4
United AirlinesOverall score based on 8619 reviews
7.0Entertainment
8.1Crew
6.6Food
7.7Boarding
7.3Comfort
Airline reviews

Plane temperature was comfortable (not to hot) when boarding and waiting for takeoff.

8.0 ExcellentAnonymous, Mar 2025YVR - DEN
Read more United Airlines reviews

Plane temperature was comfortable (not to hot) when boarding and waiting for takeoff.

Michael, our FA was very attentive, even finding me a chocolate brownie from economy class when the dessert selections were all dairy based. ( intolerant, not allergic so don’t usually need to order dairy free)

We tried to upgrade to economy premium but were told this was not possible as we had booked through United Airlines (and Air Canada was operating the flight). This seemed silly given there was ample space in economy premium. Additionally, we had to wait almost 1.5 hours upon arrival to taxi to the gate. Otherwise, the crew were very pleasant and passengers were friendly.

It was my first time with United Airlines and I would say it was very good experience and best of all the flights were on time. Will definitely fly with United Airlines next time.

headphone jack didnt work for the first flight and not much variety

The seats on this flight were almost roomy enough to be the basic amount needed for human existence. I think my favorite part of this flight was it landed at an A gate, which was the most palatial part of Sea-Tac I've ever seen - a massive improvement from the S gates.

The seats on this flight were almost roomy enough to be the basic amount needed for human existence.

Plane 3 hours late. Missed connection. No help from gate staff. App horrible. Lost connection repeatedly. No service desk. Finally got help from young girl driving cart.

Not as good as expected Air Can needs to improve totally rated on internet as worst

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

We never had an experience they canceled the flight and they did not offer us an alternative flight. I had to book one on my own expense. They offered us food voucher and we could not use them at the airport it kept saying not attached to an existing flight. The people at the counter were rude and cold and they did not care about our situation

It took 30 minutes to check in with the Westjet rep. They didn’t have enough seats and she needed to make a call… I am always “randomly” selected to be checked at security. Their “randomly “ selection system may need some updating. They treat people like criminals. It is not appropriate behavior.

Found the seats very crowded—too close together ! And waited a long time for our luggage All staff at both ends were excellent!!!

Flight cancelled and Kayak switched our return flight to a red eye. Ridiculous.

Will never book through you again. Very disappointed in the notices and action taken or provided when planes are rescheduled, enough to cause missed connections

Lost my luggage. Filed a report and there is no response. Received a phone call from another airline that said they had the bag and they did not know what to do with it

Very good over all , would have been nice to have entertainment on the flight

Absolutely the worst airline I have ever taken. They lost my baggage and told me my bag tags had been cancelled. When my bags arrived days later I had to pick them up at 3:15 am. My return flight was delayed another 6 hours and they broke my bag. Westjet does nothing to try and make it a better customer experience and all the customers services representatives I spoke with were useless and incompetent. Never flying westjet again.

Easy self checkin and baggage drop. No in seat entertainment, but wifi and app worked well

it's all good nothing you can do make better 😌

Boarding was challenging as we had to use the stairs from the tarmac. Stairs are okay but a roller bag makes it challenging.

Ensure prepaid food arrangements are appropriately understood by flight crew of who purchased and who did not

All was fine. Weather was a bit stormy, but nothing kayak can do about that! 😊

I paid for a comfort class seat and was seated in economy.

The take off was delayed as we were told that the baggages had to be rearranged to balance the weight. I only took a carry-on and a personal item, but the overhead bin was extremely small, even a normal size carryon can’t fit it, so they had to check it in for free. The seat was really tight and no entertainment at all.

My plane was cancelled and had to be rebook for the evening was not happy.

The flight was cancelled and we had to rebook on Porter to make our cruise the next day. Air Canada has not compensated. We won’t be flying with them again. This is the second time this has happened. Also the return flight was delayed 2 hours who knows why.

Separated me and my wife and wife’s sister in far apart different seats even though I booked them all together. Just scams after scams to make us pay more. Worst airline

The pork noodles were disgusting. The tuna sandwich had hardly any tuna and the bread was stale. A salad would have been better. An apple or a muffin.

My one complaint was that while we boarded using the standard enclosed gangway, when we arrived at SEATAC, the ground crew were slow to hook up the stairs. After reaching the tarmac we had to walk up a long ramp all outside in 35° weather. We just came from Bali and did not have warm weather clothes. This was in addition to having to collect our bags in Vancouver, take them through security again and then having to show our passports 4 more times all within the Air Canada section.

Everything you need to know for your flight from Ottawa to Washington

Information on your arrival and departure airports

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