SEA - YOW

$136 Find Cheap Flights from Seattle to Ottawa

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Seattle to Ottawa departing on 8/17. 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 Ottawa

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

Cheap Flights from Seattle to Ottawa (SEA-YOW)

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

Thu, Jul 24 - Sun, Jul 27
WestJet Logo
7:35 pm - 6:45 amSEA-YOW
8h 10m1 stop
WestJet Logo
6:00 am - 12:58 pmYOW-SEA
9h 58m1 stop
$318WestJet
Find Deal
Thu, Jul 24 - Sun, Jul 27
WestJet Logo
1:50 pm - 5:25 amSEA-YOW
12h 35m2 stops
WestJet Logo
6:10 am - 12:58 pmYOW-SEA
9h 48m2 stops
$320WestJet
Find Deal
Thu, Jul 24 - Sun, Jul 27
WestJet Logo
1:50 pm - 5:25 amSEA-YOW
12h 35m2 stops
WestJet Logo
6:00 am - 12:58 pmYOW-SEA
9h 58m1 stop
$327WestJet
Find Deal
Sun, Jul 13 - Sun, Jul 20
 Logo
2:05 pm - 8:05 amSEA-YOW
15h 00m2 stops
 Logo
6:00 am - 12:58 pmYOW-SEA
9h 58m1 stop
Thu, Jul 31 - Fri, Aug 8
 Logo
1:50 pm - 5:58 amSEA-YOW
13h 08m1 stop
 Logo
6:00 am - 6:38 pmYOW-SEA
15h 38m1 stop
Sun, Jun 29 - Wed, Jul 9
Air Canada Logo
5:30 am - 4:16 pmSEA-YOW
7h 46m1 stop
Air Canada Logo
2:25 pm - 8:41 pmYOW-SEA
9h 16m1 stop
$516Air Canada
Find Deal
Fri, Aug 15 - Sun, Aug 17
Air Canada Logo
5:30 am - 7:56 pmSEA-YOW
11h 26m2 stops
Air Canada Logo
6:00 pm - 10:16 pmYOW-SEA
7h 16m1 stop
$522Air Canada
Find Deal
Sun, Aug 17 - Thu, Aug 28
United Airlines Logo
12:20 am - 5:06 pmSEA-YOW
13h 46m1 stop
United Airlines Logo
6:33 am - 11:31 amYOW-SEA
7h 58m1 stop
$531United Airlines
Find Deal
Sat, Aug 16 - Tue, Aug 26
United Airlines Logo
12:20 am - 2:04 pmSEA-YOW
10h 44m1 stop
United Airlines Logo
9:50 am - 10:52 pmYOW-SEA
16h 02m2 stops
$536United Airlines
Find Deal
Thu, Jul 3 - Wed, Jul 9
Delta Logo
6:00 am - 12:22 amSEA-YOW
15h 22m2 stops
Delta Logo
5:55 am - 5:51 pmYOW-SEA
14h 56m2 stops
$1,200Delta
Find Deal
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KAYAK's insights & trends for Seattle to Ottawa flights

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

What’s the cheapest day of the week to fly from Seattle to Ottawa?

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

When flying from Seattle to Ottawa, you should consider leaving on a Thursday and avoid Sundays if you are looking for the best rates. For your return to Seattle, you’ll find the best rates on Saturdays and the most expensive ones on Mondays.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Seattle to Ottawa, 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 Seattle to Ottawa is September, where tickets cost $405 (return) on average. On the other hand, the most expensive months are February and December, where the average cost of round-trip tickets is $658 and $587 respectively.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Seattle to Ottawa, 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 Seattle to Ottawa, you should book around 2 weeks before departure. For the absolute cheapest price, our data suggests you should book 26 weeks before departure.

Good to know

Low seasonJanuary
High seasonAugust
Cheapest flight$136
Best time to beat the crowds but there is an average 4% increase in price.
Most popular time to fly and prices are also 15% lower on average.
Flight from Seattle to Ottawa

When to book flights from Seattle to Ottawa

Are your dates flexible? Find out the best times to travel from Seattle to Ottawa 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 Seattle to Ottawa

  • What is the cheapest flight from Seattle to Ottawa?

    In the last 3 days, the lowest price for a flight from Seattle to Ottawa was $136 for a one-way ticket and $318 for a round-trip.

  • Do I need a passport to fly between Seattle and Ottawa?

    Yes

  • Which airports will I be using when flying from Seattle to Ottawa?

    Seattle and Ottawa are both served by 1 main airport. You will leave Seattle from Seattle/Tacoma Intl and will be arriving at Ottawa.

  • Which aircraft models fly most regularly from Seattle to Ottawa?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Seattle to Ottawa?

    Star Alliance, and SkyTeam are the airline alliances operating flights between Seattle and Ottawa, with Star Alliance being the most commonly used for this route.

  • Which is the best airline for flights from Seattle to Ottawa, United Airlines or WestJet?

    The two airlines most popular with KAYAK users for flights from Seattle to Ottawa are United Airlines and WestJet. With an average price for the route of $586 and an overall rating of 7.4, United Airlines is the most popular choice. WestJet is also a great choice for the route, with an average price of $405 and an overall rating of 7.2.

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

    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 Seattle to Ottawa.

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

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

    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 Ottawa with an airline and back to Seattle with another airline. Booking your flights between Seattle and YOW can sometimes prove cheaper using this method.

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

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

Top 3 airlines serving from Seattle to Ottawa

 
See real verified KAYAK customer reviews for airlines flying from Seattle to Ottawa. 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 Seattle to Ottawa? 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 8801 reviews
8.1Crew
7.0Entertainment
7.3Comfort
6.6Food
7.7Boarding
Airline reviews

Boarding experience was smooth. Flight attendants were friendly and helpful. Entertainment system on the Houston-Edmonton flight did not function for passengers on the left side of the aisle. On the bird's eye flight from Quito to Houston, they should not serve a meal. No one needs to eat after midnight and it is disturbing for those passengers trying to sleep.

8.0 ExcellentAnonymous, Jun 2025IAH - YEG
Read more United Airlines reviews

Boarding experience was smooth. Flight attendants were friendly and helpful. Entertainment system on the Houston-Edmonton flight did not function for passengers on the left side of the aisle. On the bird's eye flight from Quito to Houston, they should not serve a meal. No one needs to eat after midnight and it is disturbing for those passengers trying to sleep.

Flight was late as pilot crew had to land at different airport in their previous flight. Passengers boarded and had to wait for pilots inside plane. Series of incomplete and unnecessary announcements by an annoying voice, rather than complete, informative announcements.

Delay and keep changing gates. I have to run around from B to C then to E.

Boarding was a little difficult. The gate area at O'Hare was very small and crowded due to multiple gates in the area. Could not hear the intercom, so had to rely on signage to see when my group was boarding and the signage was blocked by passengers standing in the gate. Flight was great and we arrived in Montreal on time.

My suitcase was completed destroyed. The top part is broken and unusable now.

When I booked it on Kayak it aaid that I wasn't allowed hamd luggage. I called United Airlines and it took them 6 minutes to figure out if I was allowed free hand luggage. Surely something that simple they should be able to tell me instantly.

I do prefer to fly United and have always had excellent service, except for bad weather. Flights are on time and staff is alway curtious and helpful

We were delayed in Toronto on the tarmac for THREE hours with no clear indication as to why except that it was not a safety hazard. Pilot did apologize more than once but even he was unable to explain why exactly we were delayed. I overheard the stewards saying that the captain was very frustrated with the situation as well because he was not able to explain why except it had something to do with water supply or system on the aircraft and now we needed to wait for an engineer to approve the aircraft for flight. It was very frustrating and distressing as a passenger and we should have been given complimentary meals at the very least.

All male crew was just too woke for me. I felt like a sardine. I will never take a window seat or the rearmost seat again. I booked early and did not pay for seat selection and that was a mistake. The security at IAH was atrocious. I was violated and radiated as I was in a hurry to connect to my other flight. I may have lost items under the seat in front of me that I couldn't see nor bend over to look.

Liked nothing. As per previous segment it was delay delay delay.

Not only was the flight delayed more than 3 hours but also there was no internet or movies on the flight. It was Flair/Spirit quality of experience at Westjet prices

West Jet flight was cancelled and I was not notified. I found out when I tried to check in on-line. Spent 4 hours on the phone with West Jet and Just Fly trying to figure what happened.

Only issue was checking in took over an hour and was very stressful. It all worked out, but we weren't sure for a while.

We didn’t make the flight due to Delta’s check in line moving too slow.

The flight was ahead of schedule. A half glass of juice and a cookie is pathetic! No entertainment possibilities. Not even a plug-in for phone or IPad if you wanted to watch a downloaded movie. Back to flying Air Canada!

It was good, flight was on time, boarding was smooth and done in zones, food was good too but there was no form of entertainment. Luggage’s were intact. So an overall good flight

Flight was delayed 3 times. Then cancelled due to pilot being timed out. They refused hotel vouchers. Gate attendants were very rude and could not help you at all.

No access to any entertainment No food other than a cookie or pretzels even tho flight was over the supper hour Seats very close together and very little leg room Staff was very good

The cancelation of my flight from Toronto to Edmonton without any solution given to me for my next flight. Very poor connection from Toronto to Edmonton

Too squished in seats. I'm 110 lbs and 5'6....can't imagine being any bigger and flying

Flight was delayed but the real issue is how long we sat after boarding. Space very limited for an overnight flight and seatbacks didn’t recline so it was almost impossible to sleep.

The staff made sure I was comfortable, moved me to a better seat with more leg room

Somehow, my booking was under my preferred name instead of my legal name so they almost didn’t let me board the plane at LAX. This problem should have been notified to me when I was still in Toronto.

the seats aren't the most comfy -- too little padding and I could feel whatever the passenger behind me was doing. Otherwise, it's all good.

This flight didn't happen for me because of overbooking.

Everything was simple and easy. The lady at the gate was super friendly, I wish I had her name to share. She's a little older, dark-haired. You can tell she likes her job and would be a great influence on any young people training with her.

During the pre-departure safety briefing, the flight attendants rushed through the mandatory safety announcements in both official languages, making it difficult for passengers to clearly understand the instructions. Given the importance of these messages for passenger safety, this lack of clarity was concerning. Perhaps use a recoded message to alleviate this concern. Additionally, the flight attendants appeared to lack the professional attentiveness typically expected during a flight. Rather than focusing on timely and courteous service, they seemed more engaged in personal conversations than in addressing the needs of passengers. I hope this feedback is taken constructively and helps in maintaining the high standards of professionalism and care that travelers expect from a national carrier: AC.

Service is pretty good. Sandwiches have to be purchased but I’ve bought my own food. Seat was comfortable and various movies to chose from.

All was good with comfort and ease of boarding. There was confusion from what gate to board at. Meant moving a long distance but I allowed plenty of time for this.

Good airport. Good entertainment on the big flight. Did not have a good way to prop up or mount my phone/ipad

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

Information on your arrival and departure airports

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