YYZ - SEA

$123 Find Cheap Flights from Toronto to Seattle

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Toronto to Seattle departing on 8/22. 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 Seattle

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Toronto to Seattle.
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Toronto to Seattle.
Travelers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

Save 22% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Bundle and saveSave money when you bundle your flight + hotel.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Flights Deals
Expert advice
Booking Insights
Flights Deals

Cheap Flights from Toronto to Seattle (YYZ-SEA)

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

Wed, Sep 10 - Wed, Sep 17
WestJet Logo
8:00 am - 12:59 pmYYZ-SEA
7h 59m1 stop
WestJet Logo
8:40 am - 6:52 pmSEA-YYZ
7h 12m1 stop
$204WestJet
Find Deal
Wed, Sep 10 - Wed, Sep 17
WestJet Logo
6:30 am - 12:59 pmYYZ-SEA
9h 29m1 stop
WestJet Logo
8:40 am - 12:31 amSEA-YYZ
12h 51m2 stops
$205WestJet
Find Deal
Sun, Sep 21 - Tue, Sep 30
WestJet Logo
3:00 pm - 8:29 pmYYZ-SEA
8h 29m1 stop
WestJet Logo
2:05 pm - 12:22 amSEA-YYZ
7h 17m1 stop
$206WestJet
Find Deal
Fri, Aug 29 - Fri, Sep 5
WestJet Logo
1:30 pm - 8:28 pmYYZ-SEA
9h 58m1 stop
WestJet Logo
8:40 am - 8:52 pmSEA-YYZ
9h 12m1 stop
$208WestJet
Find Deal
Fri, Aug 22 - Wed, Aug 27
WestJet Logo
9:00 am - 6:38 pmYYZ-SEA
12h 38m2 stops
WestJet Logo
1:50 pm - 12:24 amSEA-YYZ
7h 34m1 stop
$209WestJet
Find Deal
Fri, Sep 5 - Mon, Sep 8
WestJet Logo
3:00 pm - 8:29 pmYYZ-SEA
8h 29m1 stop
WestJet Logo
8:40 am - 12:31 amSEA-YYZ
12h 51m2 stops
$210WestJet
Find Deal
Wed, Sep 17 - Wed, Sep 24
WestJet Logo
12:00 pm - 8:29 pmYYZ-SEA
11h 29m2 stops
WestJet Logo
1:50 pm - 5:51 amSEA-YYZ
13h 01m2 stops
$211WestJet
Find Deal
Fri, Aug 22 - Thu, Aug 28
WestJet Logo
9:00 am - 8:28 pmYYZ-SEA
14h 28m2 stops
WestJet Logo
7:05 am - 9:03 pmSEA-YYZ
10h 58m2 stops
$212WestJet
Find Deal
Wed, Sep 17 - Wed, Sep 24
Air Canada Logo
8:40 am - 10:59 amYYZ-SEA
5h 19mnonstop
Air Canada Logo
7:15 pm - 7:00 amSEA-YYZ
8h 45m1 stop
$254Air Canada
Find Deal
Wed, Aug 27 - Sun, Aug 31
 Logo
9:00 am - 6:38 pmYYZ-SEA
12h 38m2 stops
 Logo
5:30 am - 5:45 pmSEA-YYZ
9h 15m2 stops
Expert advice

Expert advice for your flight from Toronto to Seattle

 
Snippets provided in this section are AI-generated based on a summarization of KAYAK-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.
KAYAK teamed up with top travel experts to share the best tips for your journey.
Airlines
Alaska Airlines

Enjoy priority boarding and extra legroom in Premium Class, with complimentary drinks on flights over 350 miles.


Benefit from Alaska’s 20-minute baggage guarantee or receive a discount code or bonus miles if delayed.

Air Canada

Air Canada’s Business Class offers spacious recliners with ample legroom, ideal for comfort on medium-haul flights.


Access Maple Leaf Lounges with Business Class or Aeroplan Elite Status for a relaxing pre-flight experience.

Read more about Air Canadaby Stefanie Waldek
Airports
YYZ

Pearson's security lines can be long; arrive early. Check wait times online or use YYZ Express to save time.

Read more about YYZby Stefanie Waldek
SEA

Use the Link light rail for a cost-effective 40-minute trip from SEA to downtown Seattle.

Read more about SEAby Harriet Baskas
Our travel experts
Harriet Baskas

Harriet Baskas

Expert on Alaska Airlines and SEA

Harriet Baskas

Harriet Baskas

Harriet is an award-winning journalist who is happiest in an airport or an unusual museum. Her stories about airports, air travel, and the business of travel have appeared on NBC News, CNBC, USA TODAY, The Points Guy and other outlets. She is the creator of the StuckatTheAirport.com blog and the author of nine books. When not out on the road or exploring the latest airport amenities, she’s home in Seattle getting ready for the next adventure.

Read more
Stefanie Waldek

Stefanie Waldek

Expert on Air Canada and YYZ

Stefanie Waldek

Stefanie Waldek

Stefanie Waldek is a freelance space, travel, and design writer based in Saratoga Springs, NY. Her words have appeared in Space.com, Travel + Leisure, Condé Nast Traveler, Architectural Digest, and House Beautiful, among other publications. An expert in aviation and expedition cruising, Stefanie is frequently up in the air or on the sea, likely en route to Antarctica or the Arctic.

Read more
Booking Insights

KAYAK's insights & trends for Toronto to Seattle flights

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

How much is a round-trip flight from Toronto Pearson Intl Airport to Seattle?

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

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

If your flying dates are flexible, you should consider flying to Seattle on a Thursday, as we generally find the cheapest rates on that day for this route. On the other hand, Sunday is the most expensive day to fly from Toronto to Seattle. For your return ticket, we recommend flying on a Tuesday and avoiding Saturdays for the best deals.

What is the cheapest month to fly from Toronto Pearson Intl Airport to Seattle?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Toronto Pearson Intl Airport to Seattle, 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 Toronto Pearson Intl Airport to Seattle is February, where tickets cost $269 (return) on average. On the other hand, the most expensive months are July and December, where the average cost of round-trip tickets is $449 and $447 respectively.

Can I save money by flying with a layover from Toronto Pearson Intl Airport to Seattle?

The average round-trip price for all non-stop flights, flights with one layover, and flights with two layovers for the route found by users searching on KAYAK in the last 2 weeks.

Yes, flying with a layover may cost you more time, but you can also save money on the route, with a 2 stops layover the cheapest option at $302 on average.

How far in advance should I book a flight from Toronto Pearson Intl Airport to Seattle?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Toronto Pearson Intl Airport to Seattle, 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 Toronto Pearson Intl Airport to Seattle, you should book around 3 weeks before departure, which saves you about 45% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 7 weeks before departure.

Good to know

Low seasonMarch
Cheapest flight$123
Best time to beat the crowds with an average 13% drop in price.
Most popular time to fly with an average 6% increase in price.
Flight from Toronto to Seattle

When to book flights from Toronto to Seattle

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

  • What is the cheapest flight from Toronto Pearson Intl Airport to Seattle?

    In the last 3 days, the lowest price for a flight from Toronto Pearson Intl Airport to Seattle was $123 for a one-way ticket and $204 for a round-trip.

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

    Yes, you’ll need a passport to travel to Seattle from Toronto.

  • Which airlines offer Wi-Fi service onboard planes from Toronto to Seattle?

    Air Canada, United Airlines, Alaska Airlines, Delta, and WestJet offer inflight Wi-Fi service on the Toronto to Seattle flight route.

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

    The Airbus A220-300 is the aircraft model that flies most regularly on the Toronto to Seattle flight route.

  • Which airline alliances offer flights from Toronto to Seattle?

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

  • On which days can I fly direct from Toronto to Seattle?

    There are nonstop flights from Toronto to Seattle on a daily basis.

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

    The two airlines most popular with KAYAK users for flights from Toronto to Seattle are United Airlines and WestJet. With an average price for the route of $448 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 $302 and an overall rating of 7.2.

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

    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 Toronto to Seattle.

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

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

    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 Seattle with an airline and back to Toronto with another airline. Booking your flights between Toronto and SEA 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 Toronto to Seattle?

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

KAYAK’s top tips for finding a cheap flight from Toronto Pearson Intl Airport to Seattle

  • Looking for a cheap flight? 25% of our users found flights on this route for $209 or less one-way and $349 or less round-trip.

Prefer to fly direct from Toronto to Seattle?

 
Direct data is based off flight results for the next 60 days. Find direct flights from all airlines flying direct from Toronto Pearson Intl to Seattle/Tacoma Intl.
Find which airlines fly direct from Toronto Pearson Intl Airport to Seattle/Tacoma Intl Airport, which days they fly and book direct flights.

Direct departures

Toronto Pearson Intl to Seattle/Tacoma Intl

Monday

Air Canada, Air Tahiti Nui, Alaska Airlines, +2 more

Air Canada, Air Tahiti Nui, +3 more

Tuesday

Air Canada, Air Tahiti Nui, Alaska Airlines, +3 more

Air Canada, Air Tahiti Nui, +4 more

Wednesday

Air Canada, Air Tahiti Nui, Alaska Airlines, +3 more

Air Canada, Air Tahiti Nui, +4 more

Thursday

Air Canada, Air Tahiti Nui, Alaska Airlines, +2 more

Air Canada, Air Tahiti Nui, +3 more

Friday

Air Canada, Air Tahiti Nui, Alaska Airlines, +3 more

Air Canada, Air Tahiti Nui, +4 more

Saturday

Air Canada, Air Tahiti Nui, Alaska Airlines, +2 more

Air Canada, Air Tahiti Nui, +3 more

Sunday

Air Canada, Air Tahiti Nui, Alaska Airlines, +3 more

Air Canada, Air Tahiti Nui, +4 more

See more direct flights

Direct returns

Seattle/Tacoma Intl to Toronto Pearson Intl

Monday

Air Canada, Air Tahiti Nui, Alaska Airlines, +2 more

Air Canada, Air Tahiti Nui, +3 more

Tuesday

Air Canada, Air Tahiti Nui, Alaska Airlines, +3 more

Air Canada, Air Tahiti Nui, +4 more

Wednesday

Air Canada, Air Tahiti Nui, Alaska Airlines, +3 more

Air Canada, Air Tahiti Nui, +4 more

Thursday

Air Canada, Air Tahiti Nui, Alaska Airlines, +4 more

Air Canada, Air Tahiti Nui, +5 more

Friday

Air Canada, Air Tahiti Nui, Alaska Airlines, +3 more

Air Canada, Air Tahiti Nui, +4 more

Saturday

Air Canada, Air Tahiti Nui, Alaska Airlines, +4 more

Air Canada, Air Tahiti Nui, +5 more

Sunday

Air Canada, Air Tahiti Nui, Alaska Airlines, +4 more

Air Canada, Air Tahiti Nui, +5 more

See more direct flights

Reviews of the top 5 airlines serving from Toronto to Seattle

 
See real verified KAYAK customer reviews for airlines flying from Toronto to Seattle. 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 Toronto to Seattle? 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.
8.0
Alaska AirlinesOverall score based on 10000 reviews
7.1Food
7.8Comfort
8.1Boarding
8.5Crew
7.1Entertainment
Airline reviews

My experience was great with Alaska Airlines. They were very helpful when I was checking in. The flight crew was very helpful with our needs.

10.0 ExcellentAnonymous, Jul 2025CLE - SEA
Read more Alaska Airlines reviews

My experience was great with Alaska Airlines. They were very helpful when I was checking in. The flight crew was very helpful with our needs.

Crew members were friendly, but I wouldn’t use “entertaining” to describe them. Exact step by step instructions on getting wi-fi on the phone would be helpful.

Ease of reservations, confirmation. Cramped seating, very, very uncomfortable! Claustrophobic.

My husband unfortunately had a very large lady next to him who did not fit in the seat and had to have the armrest up so she was partially in his seat and she also had horrible BO

I liked the legroom even in row 26! I fell asleep immediately and slept the whole flight.

Alaska Airlines was hit with a bad IT outage. I think its a one off and dont want to give a bad feedback to them because of that. In addition, to all the delays our particular flight had a health incident and had to stop midway. Again no negative feedback because of that. However the way they dealt with the delay was not genuine. First the communication was not consistent and always kept changing. I lost a day and $647, completely because of them. They promised a refund which i have complaints about. First it was never given to me. They aksed me to call them or text them and the wait time was 1.56 hour for calls and 3:50 hours for texts. Finally when they texted back, the support executive was rude and asked me to get my refund from Delta the other airline that i booked my ticket because Alaska cancelled their flight. When I asked why Delta would pay me for Alaska’s delay she just ended the chat. To get back on the chat I had to wait for 3.5 hours. I could not. Second they announced that even if they pay us, they would not refund us cash but were giving us a discount on future travel. I vowed never to go back to Alaska so, i do not want the discount refund. Overall, I am terribly unhappy with Alaska Airlines and never going back.

delayed flight 3 hours, then took 45 min to get to gate and another 10 min to open door

The plane was put out of service and had to wait for a new plane to be assigned. No one had any information and the information on the screens was never updated. The call wait time was 2 hours and the estimated time for text assistance was 55 minutes which was a lie because after 55 minutes nothing happened. I understand that delays happen but to not have anyone available to provide any update or reassurance was just negligent. Also, what is the point of having an 800 number if no one answers it and don’t get me started on the text message system. Ridiculous!

Very good; ohana atmosphere and taking care of customer care

Flight was delayed an hour, so that was inconvenient. But they tried to make it up in the air, which I appreciated. Crew was very nice, service was excellent. Description of food didn’t quite match what was served, but it was tasty. 👍🏽

For a 69 year old with health problems I had the worse experience, no wheelchair when I entered a lady told me to sit and wait while a gentleman told me I had to walk to the Delta station, which I did. I had a carry on and a bag, and I was traveling with my service dog, which was on his carrier and the lady charged me for my carry on luggage, beside all the waiting cause of the delay, I had to walk to get my luggage cause no wheelchair showed up, I am so disappointed. I will get in touch with the company. I got home at 3:00 am, not good for my health situation.

Great experience on Delta. Staff from baggage check to flight attendants were very courteous and professional. My only issue was a personal preference for pretzels instead of the chips and cookies that were offered.

The crew was amazing; Von, Vera and Guadalupe were very friendly and attentive throughout the entire flight. They were friendly and welcoming to everyone. A solid and dedicated team for sure!

Terrible. I was bumped off of my original flight and spent the next six days fighting to get back on it. I lost hours of my vacation trying to get this situation corrected.

There was no problems, just a little uncomfortable with seats that do not lay back a little

Always good but we must do something about people in rows ahead of you that don't put their seats back up when they are suppose to. And It's rough to not be able to even lean over to get something out of my purse.

Flight was delayed, 30+ bags had to be gate checked. Crew were very friendly!

There was a security issue at the airport and we were unable to land. We circled endlessly and then landed at another airfield for fuel. We then circled the airport again, almost landed but didn’t fully touch down before circling again. I am thankful to the crew for keeping us safe- the issue was the airline and staff at the airport getting us seats on our connecting flights. That part was hours of searching for someone and getting in double my steps.

Boarding was organised and relaxed. Crew were fantastic! Seats were lacking padding causing butt pain and stiffness.

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.

It was all good flight was on time, service was good I enjoyed a few movies and everything was smooth

Efficient, calm when things were delayed and kept us regularly informed of what was happening.

it was so bad. I tried to board my flight from vancouver to saskatoon. And to my surprise they did not board me cause the flight was changed and no email was send to me. and on my boarding pass which i got from seattle says different flight. I did not knew anyone from Vancouver, air canada crew was rude, i asked for today flight but they were rude and i had early morning dental appointment in saskatoon. I was so much in pain and my whole day is wasted today. and i suffered alot. They did provide me hotel but they did not provide me any food. I am really really disappointed first time had so bad experience with air canada. I may think twice to book it again. If i can get any reply or any composition that would be great. Thanks

Airbus plane, nice and polite staff, entertainment even as it was a short flight.

Very nice and clean plane. Transit time between flights was tight though

Our flights got changed from United to Air Canada and our purchased seats did not get transferred so we had to pay for seats twice. I brought it up with Air Canada and they stated I had to go back and chase it with United. The united seats were $21 Canadian each and Air Canada were $56 each so we have paid $77 for each seat. Very unhappy

So far so good but food and entertainment are not available for this flight

leg space better than expected. two washrooms for one plane isn't enough.

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)

Absolutely terrible, from the customer service to boarding the plane. On the phone, there was some mishaps with getting in my correct date and they did not help me retrieve a refund or any assistance. I’m gonna be reporting to all my followers and family around the region of Los Angeles to New York.

Could not fly out of Canada. Called airlines on Monday, July 14th. Tried to cancel the flight 7 days away, but they said I could not cancel and there would be no refund.

A little disorganized but overall good. The Delta flights were great though

Price was good. Entertainment and food could have been better

Arrival at Comox from, London,ON 6 hours later... No bueano

Generally good. However. The flight left 30 mins behind schedule with no reason given.

Flight delayed, missed my pick-up had to Uber, plus missed dinner and medication, so sad!

Nothing to like because my inbound flight was cancelled without notification by West Jet or third party, JustFly. I couldn’t take the inbound flight due to cancellation; therefore could not take the outbound flight back.

Not the greatest experience everything was pretty mediocre. My seat was by the washroom in the aisle and was not located well as everyone past each other people were right in my seat and space.

The small prop plane was crowded and the overhead luggage storage is a smaller than on the jets. Other than that, the crew was good, the flight was on time and the landing was smooth.

Flight got delayed for no reason. And Air Canada was doing 3 boardings via the same gate. It was chaotic!

Wonderful airline. All staff were pleasant and helpful. What is sad is that it wasn’t grand gestures just everyday pleasantness and friendliness that are missing from the other airlines I have flown recently.

Friendly efficient crew, but plane had no way to charge phone. That is a near necessity with today’s travel where we carry out travel documents on our phones.

Orlando to Canada, despite being close and an international flight, the plane was not at all comfortable. It felt like the chair was being pushed forward, in addition to not having a TV and having to choose from a tiny glass of drink, for example, water or soda. I couldn't have both. When I asked the flight attendant for an extra glass of water, she looked at me with an ugly face. This is ridiculous. They don't want to give water to passengers. I will never fly with this airline again in my life.

In a nutshell, my bag, the one I have to pay for, because now you can’t even bring a carry on, did not make it. I am still waiting for an update. The fact that not only were have to pay for it, but on top of that we are stuck without getting it, it’s ridiculous..

This was an excellent experience for a very short flight.

No space in overhead bin, one cookie, 2 oz of juice - is not customer service.

Somebody either kayak or Air Canada booked my flight under my preferred name Betty instead of my legal name and I almost was denied boarding my flight

The ground staff was so rude in Toronto airport ...very rude and did not answer simple questions, and made me look like a fool. Very rude ground staff.

My flight got delayed 5 times and then got cancelled eventually, I had to get a hotel and uber and pay for food for an extra night without any plans. It was a horrible experience, instead of Air Canada, I was flying with United .

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

Information on your arrival and departure airports

Not what you’re looking for? Find thousands of other hotels, flights, car rentals and package deals with KAYAK.