C$ 249 Find Cheap Flights from Ottawa to Washington – 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 departing on 27/8. 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
1 adult, Economy, 0 bags

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Cheap Flights from Ottawa to Washington

 
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.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Ottawa to Washington

Wed, 23 Sep - Wed, 30 Sep
WestJet Logo
1:20 p.m. - 6:45 p.m.YOW  Ottawa-SEA Seattle/Tacoma Intl
8h 25m1 stop Calgary
WestJet Logo
7:35 p.m. - 5:35 a.m.SEA  Seattle/Tacoma Intl-YOW Ottawa
7h 00m1 stop Calgary
C$ 463WestJet
Thu, 3 Sep - Thu, 10 Sep
WestJet Logo
12:25 p.m. - 9:00 p.m.YOW  Ottawa-SEA Seattle/Tacoma Intl
11h 35m2 stops Winnipeg Calgary
WestJet Logo
7:35 p.m. - 5:35 a.m.SEA  Seattle/Tacoma Intl-YOW Ottawa
7h 00m1 stop Calgary
C$ 464WestJet
Thu, 17 Sep - Thu, 24 Sep
Air Canada Logo
2:45 p.m. - 10:47 p.m.YOW  Ottawa-SEA Seattle/Tacoma Intl
11h 02m2 stops Montreal Pierre Elliott Trudeau Intl Vancouver Intl
Air Canada Logo
8:00 a.m. - 7:10 p.m.SEA  Seattle/Tacoma Intl-YOW Ottawa
8h 10m1 stop Toronto Pearson Intl
C$ 570Air Canada
Sat, 24 Oct - Sat, 7 Nov
Air Canada Logo
6:05 p.m. - 10:42 p.m.YOW  Ottawa-SEA Seattle/Tacoma Intl
7h 37m1 stop Vancouver Intl
Air Canada Logo
8:40 a.m. - 11:11 p.m.SEA  Seattle/Tacoma Intl-YOW Ottawa
11h 31m2 stops Vancouver Intl Calgary
C$ 575Air Canada
Wed, 16 Sep - Fri, 25 Sep
United Airlines Logo
3:10 p.m. - 10:03 p.m.YOW  Ottawa-PDX Portland
9h 53m1 stop Newark
United Airlines Logo
6:55 p.m. - 4:38 p.m.PDX  Portland-YOW Ottawa
18h 43m2 stops Denver Intl Newark
C$ 582United Airlines
Wed, 16 Sep - Fri, 25 Sep
United Airlines Logo
5:20 p.m. - 10:52 p.m.YOW  Ottawa-PDX Portland
8h 32m1 stop Chicago O'Hare Intl
United Airlines Logo
11:30 p.m. - 2:09 p.m.PDX  Portland-YOW Ottawa
11h 39m1 stop Chicago O'Hare Intl
C$ 582United Airlines
Mon, 21 Sep - Mon, 28 Sep
Multiple Airlines Logo
2:00 p.m. - 10:05 a.m.YOW  Ottawa-SEA Seattle/Tacoma Intl
23h 05m3 stops Hamilton Calgary Vancouver Intl
Multiple Airlines Logo
7:35 p.m. - 5:35 a.m.SEA  Seattle/Tacoma Intl-YOW Ottawa
7h 00m1 stop Calgary
C$ 625Multiple Airlines
Thu, 17 Sep - Thu, 24 Sep
Multiple Airlines Logo
2:45 p.m. - 10:47 p.m.YOW  Ottawa-SEA Seattle/Tacoma Intl
11h 02m2 stops Montreal Pierre Elliott Trudeau Intl Vancouver Intl
Multiple Airlines Logo
5:50 a.m. - 5:35 a.m.SEA  Seattle/Tacoma Intl-YOW Ottawa
20h 45m3 stops Vancouver Intl Edmonton Calgary
C$ 629Multiple Airlines
Mon, 12 Oct - Thu, 22 Oct
Delta Logo
1:20 p.m. - 6:45 p.m.YOW  Ottawa-SEA Seattle/Tacoma Intl
8h 25m1 stop Calgary
Delta Logo
7:35 p.m. - 5:35 a.m.SEA  Seattle/Tacoma Intl-YOW Ottawa
7h 00m1 stop Calgary
C$ 1,380Delta
Mon, 12 Oct - Mon, 19 Oct
Delta Logo
1:20 p.m. - 6:45 p.m.YOW  Ottawa-SEA Seattle/Tacoma Intl
8h 25m1 stop Calgary
Delta Logo
7:35 p.m. - 5:35 a.m.SEA  Seattle/Tacoma Intl-YOW Ottawa
7h 00m1 stop Calgary
C$ 1,380Delta
Booking Insights

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.

How much is a round-trip flight from Ottawa to State of Washington?

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 State of Washington departing in September.

Flight prices are below average for this route right now.

Flights to State of Washington from Ottawa usually cost between C$ 534 and C$ 800 in September.
The lowest price found in the past 5 days was C$ 463 on WestJet (23 Sep–30 Sep).

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 January, when tickets cost C$ 398 (return) on average. On the other hand, the most expensive months are May and July, when the average cost of round-trip tickets is C$ 800 and C$ 786 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 a flight from Ottawa to Washington, you should book around 4 weeks before departure, which saves you about 39% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 17 weeks before departure.

Good to know

Low season

March

Cheapest flight

C$ 249
Best time to beat the crowds but there is an average 11% increase in price.
Most popular time to fly (7% more expensive 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.

Reviews of the top 4 airlines flying 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.
7.8
DeltaOverall score based on 8505 reviews
7.2Food
8.1Boarding
7.8Entertainment
7.8Comfort
8.5Crew
Airline reviews

They did everything right and everything happened right on time.

10.0 ExcellentSteve, Jul 2026
Read more Delta reviews

They did everything right and everything happened right on time.

20 year old 737 but really poor service from the flight attendants who must have been new.

Not really a “Delta” problem but worth mentioning: Boarding was a difficult process. TSA seemed understaffed and Pre-Check took longer than regular TSA. The supervisor was frazzled and yelled at travelers. Once through TSA, we had to put our carry-ons through another x-ray machine. Then queue up to board with both boarding pass and ID. Then, when we got to the stairs on the tarmac, we had to show our boarding pass again. Maybe this is just normal for Kona since the terminal is outdoors (but still a “secured” area).

Checkin was good, fllight ws good. Onlly complaint is lack of foot on 6 hour flight from Seattle to Boston. Snacks were flimsy - chips and cookies. could have offered something more substantial for such a long flight. I know you can buy food in airport but for the price you pay for a ticket, they should step up for the passengers.

Much better than I expected. I had an economy ticket so I was really happy the flight was so comfy and the service so generous. Passengers were all polite too.

After I checked in, I realized we had no seat assignment. It said they would be assigned at the gate. This was really frustrating because I usually use a lounge before flights, but I couldn't because I had to be at the gate to ensure we got our seat assignments. The gate agent arrived an hour before the flight left. I was the first one up to ask about seat assignments. She told us to wait for names to be called. Dozens of other passengers were paged, but we were not. Finally, I asked my husband to ask. He went up and was also told to wait. About 10 minutes later, they called for boarding. We still had not been told our seats. We went back to the desk and they were in a panic, saying we actually weren't on that flight. Then they made an announcement telling the stand by passengers to not board (in case we needed their seats). It was so stressful and unprofessional. Finally they gave us our seats. I have no idea what happened and why the two desk agents seemed to have conflicting ideas about our seats, whether we were on that flight etc.

Very dissatisfied with the fact that I had upgraded to first class for the second part of my trip only to find out that the lounge was still not available to me, as well as not having any food or drink service on the flight due to weather, so I lost out more than what I paid for.

It was very good. Our flight was delayed and we as a result missed our connecting flight but rescheduled to the next day. The Need Help staff was so great and offered us compensation that was beyond satisfactory.

Excellent. No issue and it was on time and arrived early, the best!

It was a Red-Eye flight so was not comfortable enough to sleep, but seat was as expected. Crew was great and in-flight entertainment was excellent. Flight was smooth

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

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.

My flight was delayed by a whole day, so I lost a day of my vacation.

How would you rate my experience when I was stuck in YOW without being offered a cup of water by the airline?

Maybe glass of wine would be nice at no charge

The agents at the Kelowna YLW airport were really grumpy. Same with oversized baggage person. Staff on the plane were great.

Experience was good, the wifi hook up is somewhat tough

I will not be flying with westjet again. I was uncomfortable in my seat. The position made my back hurt so bad. My wife was able to fit the seatbelt around her with out an extension but was unable to put the tray table down or fit in the seat for that matter. Our bag was smashed and I spent two hours trying to fill out the application for a damaged bag before I gave up. The 80 photos I took would not work and nothing telling me the format to upload them as.. I made the mistake of unpacking the bag before taking photos so no claim for me. Next trip to Canada I will have to use air Canada.

Airplane is too small. Crew, especially the flight attendant who looked after our area, was not at all friendly and a touch authoratative. She may have been the most gruff flight attendant i've come across in 40 years of business travel

Good value, minor delay due to waiting for inbound plane but they gave accurate information about wait time. Able to switch to a seat by my husband thanks to a kind flight attendant

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

Terrible! Delayed three times, landed at some corner of airport, walked in bitter cold night, took a bus, bad experience

Not a tonne of food for purchase items for early morning.

Long delay die to pet mix up. Also bags took forever to get to carousel

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😍👍.

It was out first time flying Air Canada and it was ok, comfort-wise. I hope airlines are able to get a quiet room installed for young children flying. Screaming and crying the whole time in business class is quite unfortunate. That was the only thing that really messed up the experience.

Staff were very friendly. Plane left on time and arrived on time.

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

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

One United employee a little impatient, also on flight WiFi was out for some time. I was happy to receive a complimentary alcoholic beverage for volunteering to check my carry on bag.

Everything was great, staff, planes, at the gate. All around everything was a pleasure flying .

I COULD NOT GET ON THE FLIGHT BECAUSE THE AIR CANADA CHECK-IN STAFF COULD NOT CHECK ME IN NEITHER COULD THEY DIRECT ME TO THE ALTERNATIVE CHECK-IN AIRLINE I DIDN'T FLY AND HAD TO REBOOK ANOTHER AIRLINE, PORTER FOR THE FOLLOWING DAY. I NEED MY REFUND FOR THE RETURN LEG

When a person pays 500 $ for one way ticket that person should have better seat not the seat before the bathrooms.🤔🤨

Seating is very tight. We were delayed 90 minutes to board, because the flight crew were late

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

Information on your arrival and departure airports