SEA - YOW

$168 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 11/20. 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

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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Flight 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

Tue, Mar 10 - Wed, Mar 11
United Airlines Logo
11:59 pm - 10:26 amSEA-YOW
7h 27m1 stop
United Airlines Logo
2:15 pm - 8:35 pmYOW-SEA
9h 20m1 stop
$259United Airlines
Find Deal
Tue, Mar 10 - Wed, Mar 11
United Airlines Logo
9:19 am - 10:26 amSEA-YOW
22h 07m2 stops
United Airlines Logo
2:15 pm - 8:35 pmYOW-SEA
9h 20m1 stop
$264United Airlines
Find Deal
Mon, Feb 9 - Wed, Feb 25
WestJet Logo
3:10 pm - 4:53 pmSEA-YOW
22h 43m1 stop
WestJet Logo
5:40 am - 2:19 pmYOW-SEA
11h 39m2 stops
$277WestJet
Find Deal
Wed, Jan 21 - Fri, Jan 23
Air Canada Logo
5:50 am - 3:45 pmSEA-YOW
6h 55m1 stop
Air Canada Logo
5:45 am - 2:31 pmYOW-SEA
11h 46m2 stops
$278Air Canada
Find Deal
Fri, Feb 6 - Tue, Feb 24
Air Canada Logo
5:50 am - 3:45 pmSEA-YOW
6h 55m1 stop
Air Canada Logo
4:15 pm - 10:16 pmYOW-SEA
9h 01m1 stop
$279Air Canada
Find Deal
Tue, Feb 24 - Wed, Mar 11
WestJet Logo
3:10 pm - 12:39 amSEA-YOW
30h 29m2 stops
WestJet Logo
5:40 am - 2:19 pmYOW-SEA
11h 39m2 stops
$282WestJet
Find Deal
Sat, Feb 14 - Sun, Mar 1
Air Canada Logo
8:00 pm - 6:43 amSEA-YOW
7h 43m1 stop
Air Canada Logo
5:00 am - 3:01 pmYOW-SEA
13h 01m2 stops
$284Air Canada
Find Deal
Wed, Feb 11 - Tue, Feb 24
Air Canada Logo
8:10 am - 6:38 pmSEA-YOW
7h 28m1 stop
Air Canada Logo
4:15 pm - 10:16 pmYOW-SEA
9h 01m1 stop
$286Air Canada
Find Deal
Sat, Feb 21 - Sun, Mar 8
Multiple Airlines Logo
8:00 am - 12:39 amSEA-YOW
13h 39m1 stop
Multiple Airlines Logo
5:40 am - 1:19 pmYOW-SEA
11h 39m2 stops
$324Multiple Airlines
Find Deal
Mon, Feb 23 - Sun, Mar 8
Multiple Airlines Logo
3:10 pm - 2:01 pmSEA-YOW
19h 51m2 stops
Multiple Airlines Logo
6:00 am - 2:19 pmYOW-SEA
11h 19m1 stop
$332Multiple Airlines
Find Deal

Everything you should know

Top airlines
United Airlines
Cheapest • from $259 (round-trip)
United Airlines
Best reviews • 7.4 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to book
2 weeks
in advance
Our data shows that travelers who book at least 2 weeks in advance save around 52% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
October
Cheapest • 21% price drop
March
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Cheapest round-trip
$259
Overall average: $494
United Airlines
Tue 3/10Wed 3/11
SEA - YOW • 1 stop
Cheapest one-way
$168
Typical prices: $485-$521
Multiple Airlines
Thu 11/20
SEA - YOW • 1 stop
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Ottawa!
Booking Insights

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 October, where tickets cost $393 (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 $614 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, which saves you about 52% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 26 weeks before departure.

Good to know

Low seasonJanuary
Cheapest flight$168
Best time to beat the crowds but there is an average 5% increase in price.
Most popular time to fly and prices are also 2% 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 $168 for a one-way ticket and $259 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 is the only airline alliance operating flights between Seattle and Ottawa.

  • 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 $592 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 $403 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.

Reviews of the 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 8999 reviews
6.6Food
7.3Comfort
7.1Entertainment
8.1Crew
7.7Boarding
Airline reviews

Not the fault of United—weather, reroute around weather, time sitting on tarmac, arrived couple hours late, too late for train into city necessitating a much pricier cab but weather…can’t be helped.

8.0 ExcellentBrad, Oct 2025ORD - YYZ
Read more United Airlines reviews

Not the fault of United—weather, reroute around weather, time sitting on tarmac, arrived couple hours late, too late for train into city necessitating a much pricier cab but weather…can’t be helped.

Flight was good but there are way to many announcements for credit cards etc.

I had no checked baggage but was required to hand over carry on baggage at the door of the plane. There was a lot of overboard space in the plane and I was one of the last ones. I ran to get my carry on but it was gone. I was given back at the plane door in Toronto, so the wait was not as long as it would have been at the carousel.

We had a layover from YVR to Denver. We bought 4 bottles of Absolut Vodka at the YVR Duty Free for $116.20, after going through security and American Customs Pre Clearance at YVR, Vancouver. When we landed in Denver, United put us behind the American Customs as well as TSA again for some reason. We were forced to go through American Customs and TSA again. TSA confiscated our rightfully owned Duty Free Absolut Vodka bottles. Because United incorrectly forced our flight behind American border and TSA again, we missed the connecting flight. After United put us on a later flight, we eventually arrived in Chicago very late, with hardly any sleep. I am looking for compensation from United for our incorrectly confiscated Absolut Vodka bottles worth $116.20, as well as compensation for incorrectly putting us behind American Customs and TSA again, causing us to miss our connecting flight, making us arrive extremely late in Chicago.

From the first moment you interact with United Airlines, you can expect nothing less but extreme frustration. The baggage handler at the bag drop seems completely unbothered by the presence of customers waiting in line. No help was extended to load the baggage whatsoever. And if any of your bags is overweight by 0.01 pound they will make you re-distribute everything in your suitcase just to play power trip. When it was time to board no help was extended to customers to locate their seats. Moreover. It was a chaotic mess at the gate when it was unclear who should board first and everyone just bunched up, trying to get on the plane. I am sure the crew was doing their best to perform their jobs while being paid their wages however it shouldn’t be that hard to smile once or twice when you’re in the business if serving customers. It is a shame for the United States of America to have a flagship carrier of such low caliber. Our flight was also delayed by about an hour and a half due to further delays prior to our inbound flight. Being someone who has travelled for both business and leisure in Asia, Europe, and South America I have never experienced such poor quality of service.

Had to cancel first flight because Airporter Bus took over 3 hrs to get to airport which resulted in an extra $378 dollar fare . Is there anyway I can be reimbursed for initial fare since it was not my fault? Sent from my iPhone EJ Ledet

The pilots were late and it made us 1 hour late. The meat was tough and bok choy was also tough.

the delay for 3 hours was understandable due to weather conditions but the flight should’ve provided some on flight compensations or at least provide more food.

Flight was actually on Air Canada. The flight itself was fine. Nothing special. Food was pretty pathetic except for cookies. They offered plenty of food and drinks but just wasn't very good. Even for airline food.

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.

The keg from Edmonton to Toronto My wife found it very cold. Other than that great flight.

Smooth flight Staff were courteous and welcoming upon entering and exiting the plane Pilot and crew provided frequent updates Leg space was not pleasant but manageable

Everything was good except I was a bit disappointed that I had to pay US $150 for bags.

Flight itself good .Landing at terminal3 and connections to terminal1,it is connections nightmare,specially for disable person

The seats very Uncomfortable, no meal and no entertainment for a 4Hours flight. Smooth Flight, Great Take off and landing. Superb crew!

The flight attendants were super! They created a cosy and warm flight atmosphere!

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.

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

I would like to get my money back. I flight was 4 hours late on the way to detroit, And same on my way back to Brussels they cancelled my flight and give me an other ticket and i had to wait 5 hours.

All attendents were very efficient, pleasant and happy. Everything went smoothly. The seats could have been wider. There could have been more free food instead of just one small bar.

They could care less about you. Just under a 4 hour delay in Seattle, leading into a missed connection in Vancouver, which led to 2 more delays that added up to 3 more hours leaving us to have to sleep on the floor of the Toronto airport cause they don't help you find accomodations and they just book you on the next flight out. Took an additional 14 hours to get home. Always given the brush off to get rid of us. Worst airline ever

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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