SEA - YOW

$161 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 5/16. 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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41,299,237 searches in the past 7 days on KAYAK

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Everything you should know

Cheapest round-trip
$333
Typical prices: $719-$522
WestJet
Mon 7/13Tue 7/21
SEA - YOW • 1 stop
Cheapest one-way
$161
Typical prices: $169-$219
WestJet
Sat 5/16
SEA - YOW • 1 stop
Nonstop flights
Not available
There are currently no direct flights between Seattle and Ottawa. You'll need at least 1 connection.
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Top layover airports
Cheapest • Avg $368 (round-trip)
Shortest trip • 7h 12m (one-way)
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When to book
in advance
Our data shows that travelers who book at least 6 weeks in advance save around 61% compared to booking last minute.
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When to travel
Cheapest • 100% price drop
Most popular
Good to know
Good to know
+1
+1
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+1
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KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Ottawa!
Flight Deals
Booking Insights
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

Mon, Jul 13 - Tue, Jul 21
WestJet Logo
7:35 pm - 5:35 am
SEA
-
YOW
7h 00m
1 stop
WestJet Logo
1:20 pm - 6:45 pm
YOW
-
SEA
8h 25m
1 stop
$333WestJet
Sat, May 16 - Mon, Jun 29
WestJet Logo
7:35 pm - 5:35 am
SEA
-
YOW
7h 00m
1 stop
WestJet Logo
1:20 pm - 6:45 pm
YOW
-
SEA
8h 25m
1 stop
$335WestJet
Sat, May 16 - Mon, Jun 29
WestJet Logo
7:35 pm - 5:35 am
SEA
-
YOW
7h 00m
1 stop
WestJet Logo
1:20 pm - 6:45 pm
YOW
-
SEA
8h 25m
1 stop
$336WestJet
Sat, May 16 - Wed, Jul 8
WestJet Logo
7:35 pm - 5:35 am
SEA
-
YOW
7h 00m
1 stop
WestJet Logo
1:20 pm - 6:45 pm
YOW
-
SEA
8h 25m
1 stop
$339WestJet
Thu, May 14 - Mon, Jun 29
WestJet Logo
7:35 pm - 5:35 am
SEA
-
YOW
7h 00m
1 stop
WestJet Logo
1:20 pm - 6:45 pm
YOW
-
SEA
8h 25m
1 stop
$340WestJet
Thu, May 14 - Mon, Jun 29
WestJet Logo
7:35 pm - 5:35 am
SEA
-
YOW
7h 00m
1 stop
WestJet Logo
1:20 pm - 6:45 pm
YOW
-
SEA
8h 25m
1 stop
$341WestJet
Fri, May 15 - Mon, Jun 29
WestJet Logo
7:35 pm - 5:35 am
SEA
-
YOW
7h 00m
1 stop
WestJet Logo
1:20 pm - 6:45 pm
YOW
-
SEA
8h 25m
1 stop
$343WestJet
Tue, Jun 30 - Wed, Jul 15
WestJet Logo
7:35 pm - 5:35 am
SEA
-
YOW
7h 00m
1 stop
WestJet Logo
1:20 pm - 6:45 pm
YOW
-
SEA
8h 25m
1 stop
$344WestJet
Thu, May 14 - Tue, Jul 7
WestJet Logo
7:35 pm - 5:35 am
SEA
-
YOW
7h 00m
1 stop
WestJet Logo
1:20 pm - 6:45 pm
YOW
-
SEA
8h 25m
1 stop
$345WestJet
Fri, May 15 - Tue, Jun 30
WestJet Logo
7:35 pm - 5:35 am
SEA
-
YOW
7h 00m
1 stop
WestJet Logo
1:20 pm - 6:45 pm
YOW
-
SEA
8h 25m
1 stop
$347WestJet
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.

How much is a round-trip flight from Seattle to Ottawa?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Seattle to Ottawa departing in July.

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 March, where tickets cost $0 (return) on average. On the other hand, the most expensive months are December and June, where the average cost of round-trip tickets is $728 and $674 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 6 weeks before departure, which saves you about 61% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 25 weeks before departure.

Good to know

Low seasonOctober
Cheapest flight$161
Best time to beat the crowds with an average 23% drop in price.
Most popular time to fly and prices are also 14% 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 $161 for a one-way ticket and $335 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 $614 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 $394 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 9680 reviews
8.1Crew
7.7Boarding
7.1Entertainment
7.3Comfort
6.6Food
Airline reviews

Some crew were unfriendly or in some cases just straight up rude.

6.0 GoodAnonymous, Apr 2026
SFO - YVR
Read more United Airlines reviews

Some crew were unfriendly or in some cases just straight up rude.

Putting people that close to the bathroom, where you have to look into the bathroom as people are exiting and entering was not great and the smell was also not great. I know the airlines are desperate for more chairs, but that seat is a crime.

one staffer was frustrated (it happen); the flight was late and the pilot mentioned they'll make amend but the snacks were the same, other than that the aircraft was clean and everything went smooth, no complaints

ticket agent lady wás very helpful , she arranged wheel chair for my elderly mother

Entertainment kept turning itself off. Gave up on watching a movie.

Wifi took a while to kick in and we had a maintenance issue that took over 40 mins at the gate in Washington before pulling back

Not United Airlines' fault. It's ORL airport's fault.

United overall experience is great these days. Airport experience was very organized. Staff on flight were great. App and information as good as it gets.

Very nice flight love the small aircraft. We had a wonderful flight attendant. Nice to see someone that really enjoys her job. Don't have her name but had a southern accent.

Seats in waiting area and on plane hard as rock. Fast internet on the flight was great! Crew was kind.

Westjet was late and we missed our connecting flight with Cathay. Had to wait 8 hours. Westjet only allows 1 checked in baggage for international flights- it’s always been 2. Canada allows only 1 sandwhich bag size full off small liquids. Everything else will be tossed. Awful trip. Will never fly west jet or go to Toronto to connect flights!

I didn’t have any food but my Prosecco hit the spot. We left on time and the crew was friendly.

I thought the coffee was excellent! The wait for the luggage was acceptable.. It left and arrived on time. My son found that his device worked very well and he really enjoyed his flight! The stewardess moved him up to the emergency exit and he very much appreciated that!

I wasn’t able to book or pay for a seat and they forgot to check me in for my third flight so I spent 24 hours in Toronto waiting for another one.

I didn't think about not having the right app for wifi because my connecting flight was with Westjet and when I took off from Seattle I was thinking I would use my wifi, but realized I couldn't on my Westjet app and I did not have Delta's app downloaded.

Everything was good except for flight delay, but it was because of the snow storm in the arrival airport.

The flight was cancelled less than 24 hours before departure. The alternate flight was a day later going from Grenada to Toronto to Vancouver to Calgary to Montreal. 2 days in the air. Not serious, Very bad service

I like the wider seats, Plus lots of legroom, Lacking entertainment, no tv or screen to play with

Liked in-flight wifi Did not like - nothing to complain, really. All good

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

Very tight seats - no legroom at all, very tight to the person in front of you. If you have basic fare, you are loading zone 6 regardless of where you are sitting in the plane - meaning even as a middle aisle person at the front of the plane, I had to get people to get up and let me in as they had boarded earlier. Having to pay for a carry on is criminal. I am a frequent flyer, and air Canada has now joined the list of other terrible North American Airlines.

All good……but luggage didn’t make it on the airplane. Had to wait 3 days. Was a bummer.

Small suitcase used for carryon the last time was refused by boarding crew this time. Appears to be at the discretion and mood of the person on the day. Flight was only half booked, there would have been no problem with space.

Delayed by 5+ hours and they give a voucher for only $20 CAD which isn’t even redeemable at any place with edible food. Then took almost an hour to clean craft after it landed. And nonsensical boarding delayed even further. We didn’t leave until 1:30am….

I travelled in Business class for the first time and wish I could do that again.

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.

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

Information on your arrival and departure airports