YYZ - SEA

$153 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 12/2. 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 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.
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Flight 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

Tue, Nov 25 - Wed, Dec 3
WestJet Logo
7:45 am - 2:20 pmYYZ-SEA
9h 35m1 stop
WestJet Logo
3:15 pm - 5:58 amSEA-YYZ
11h 43m2 stops
$211WestJet
Find Deal
Tue, Nov 25 - Sat, Nov 29
WestJet Logo
7:45 am - 2:20 pmYYZ-SEA
9h 35m1 stop
WestJet Logo
3:20 pm - 5:58 amSEA-YYZ
11h 38m2 stops
$213WestJet
Find Deal
Wed, Dec 3 - Fri, Dec 12
WestJet Logo
7:45 am - 2:35 pmYYZ-SEA
9h 50m1 stop
WestJet Logo
3:10 pm - 5:58 amSEA-YYZ
11h 48m2 stops
$218WestJet
Find Deal
Tue, Nov 25 - Fri, Nov 28
WestJet Logo
7:45 am - 2:20 pmYYZ-SEA
9h 35m1 stop
WestJet Logo
3:10 pm - 5:58 amSEA-YYZ
11h 48m2 stops
$219WestJet
Find Deal
Wed, Nov 26 - Wed, Dec 3
Alaska Airlines Logo
4:45 pm - 7:17 pmYYZ-SEA
5h 32mnonstop
Alaska Airlines Logo
7:55 am - 3:35 pmSEA-YYZ
4h 40mnonstop
$223Alaska Airlines
Find Deal
Tue, Nov 25 - Tue, Dec 2
Multiple Airlines Logo
7:45 am - 2:20 pmYYZ-SEA
9h 35m1 stop
Multiple Airlines Logo
7:55 am - 3:35 pmSEA-YYZ
4h 40mnonstop
$230Multiple Airlines
Find Deal
Tue, Nov 25 - Fri, Nov 28
Multiple Airlines Logo
4:45 pm - 7:17 pmYYZ-SEA
5h 32mnonstop
Multiple Airlines Logo
11:55 am - 11:39 pmSEA-YYZ
8h 44m2 stops
$237Multiple Airlines
Find Deal
Tue, Nov 25 - Tue, Dec 2
Alaska Airlines Logo
4:45 pm - 7:17 pmYYZ-SEA
5h 32mnonstop
Alaska Airlines Logo
7:55 am - 3:35 pmSEA-YYZ
4h 40mnonstop
$240Alaska Airlines
Find Deal
Sat, Nov 22 - Sat, Nov 29
Air Canada Logo
7:50 pm - 10:16 pmYYZ-SEA
5h 26mnonstop
Air Canada Logo
8:10 am - 3:53 pmSEA-YYZ
4h 43mnonstop
$253Air Canada
Find Deal
Tue, Nov 25 - Sat, Nov 29
Air Canada Logo
7:50 pm - 10:16 pmYYZ-SEA
5h 26mnonstop
Air Canada Logo
8:10 am - 3:53 pmSEA-YYZ
4h 43mnonstop
$265Air Canada
Find Deal

Everything you should know

Our travelers' advice
AI-generated summary based on content written by travel experts
Alaska Airlines offers priority boarding and extra legroom.
Pearson's security lines can be long; arrive early.
Expert advice
Expert advice
Expert advice
Expert advice
Top airlines
WestJet
Cheapest • from $211 (round-trip)
Alaska Airlines
Best reviews • 8.0 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to book
3 weeks
in advance
Our data shows that travelers who book at least 3 weeks in advance save around 49% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
February
Cheapest • 24% price drop
August
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Cheapest round-trip
$211
Typical prices: $268-$519
WestJet
Tue 11/25Wed 12/3
YYZ - SEA • 1 stop
Cheapest non-stop
$223
Typical prices: $275-$562
Alaska Airlines
Wed 11/26Wed 12/3
YYZ - SEA • Non-stop
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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 Seattle!
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?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Toronto Pearson Intl Airport to Seattle departing in November.

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 Tuesday, 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 August, where the average cost of round-trip tickets is $449 and $413 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.

No, with an average price for the route of $336, prices are generally cheapest when you fly direct.

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 49% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 4 weeks before departure.

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

Good to know

Low seasonJanuary
Cheapest flight$153
Best time to beat the crowds with an average 24% drop in price.
Most popular time to fly with an average 16% 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 $153 for a one-way ticket and $211 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?

    SkyTeam, oneworld, and Star Alliance are the airline alliances operating flights between Toronto and Seattle, with SkyTeam 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, Alaska Airlines or Delta?

    The two airlines most popular with KAYAK users for flights from Toronto to Seattle are Alaska Airlines and Delta. With an average price for the route of $416 and an overall rating of 8.0, Alaska Airlines is the most popular choice. Delta is also a great choice for the route, with an average price of $364 and an overall rating of 7.9.

  • 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 $198 or less one-way and $299 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, Alaska Airlines

Air Canada, Alaska Airlines

Tuesday

Air Canada, Alaska Airlines

Air Canada, Alaska Airlines

Wednesday

Air Canada, Alaska Airlines

Air Canada, Alaska Airlines

Thursday

Air Canada, Alaska Airlines

Air Canada, Alaska Airlines

Friday

Air Canada, Alaska Airlines

Air Canada, Alaska Airlines

Saturday

Air Canada, Alaska Airlines

Air Canada, Alaska Airlines

Sunday

Air Canada, Alaska Airlines

Air Canada, Alaska Airlines

See more direct flights

Direct returns

Seattle/Tacoma Intl to Toronto Pearson Intl

Monday

Air Canada, Alaska Airlines

Air Canada, Alaska Airlines

Tuesday

Air Canada, Alaska Airlines

Air Canada, Alaska Airlines

Wednesday

Air Canada, Alaska Airlines

Air Canada, Alaska Airlines

Thursday

Air Canada, Alaska Airlines

Air Canada, Alaska Airlines

Friday

Air Canada, Alaska Airlines

Air Canada, Alaska Airlines

Saturday

Air Canada, Alaska Airlines

Air Canada, Alaska Airlines

Sunday

Air Canada, Alaska Airlines

Air Canada, Alaska Airlines

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 11214 reviews
7.8Comfort
8.1Boarding
7.1Food
7.0Entertainment
8.5Crew
Airline reviews

Check in went pretty well and you didn't lose my bag. After I got a drink from the drink cart they charged me for it, and at the crazy overpriced airport rates. Never had that happen before, is that an american thing? what madness.

6.0 GoodAnonymous, Oct 2025SJC - SEA
Read more Alaska Airlines reviews

Check in went pretty well and you didn't lose my bag. After I got a drink from the drink cart they charged me for it, and at the crazy overpriced airport rates. Never had that happen before, is that an american thing? what madness.

In both halves of the trip (going and returning) there were problems. Not exactly Alaska's fault, but still really difficult. Outgoing flight was canceled and rebooked twice due to a total ground stop of all Alaska's flights. This required me to change airports with minimal notice and I almost missed my flight transferring to the other airport (which was roughly an hour and a half away). On the return, the first leg was delayed by an hour, and the second leg was delayed by nearly 3 hours. This was a rough set of flights and the communication about all of these changes was minimal. Crew did their best however, so no fault there. Other thing to remember is there is no food on Alaska flights unless you pre-order. Take that into account when you choose airlines.

My flight was canceled because of an IT outage, and they did not answer the phone for 8 hrs. There was no next flight out, I have missed my wedding because of this.

Liked the crew. Multiple delays. Altered my complete day and plans

Apart from the man snoring very loudly across the aisle from us for about 3.5 of the 5 hour flight it was a great flight. I couldn't get the internet to work and stay working. Texting was intermittent for me.

The plane boarded late and arrived late which wasn't really ideal.

The pretzels have no taste. How about a choice of snacks? The flight itself was fine.

This was my first time using Alaska. The best thing about Alaska is the people. Everyone that I had any contact with couldn’t have been better. So far on this trip no complaints. I will use Alaska again

Full, attentive service from the fist class cabin flight attendant was superb. Really exceeded expectations.

The stewards were too loud and chatty with each other

Staff were friendly and happy. Delta could make sure passengers that don't have the app know of changes. Without Kayak I would not have known about the change of gate or the delay. Kayak was faster to notify me.

They ended up paying for the bag twice, but the counter wouldn't take my baggage receipt. Left it to me to resolve. Not sure how to resolve the issue.

The customer service before board was very rude and when I expressed my concerns about making the connecting flight she laughed and told me I bought the wrong ticket. I explained once it showed the flight was delayed it no longer let me change seats or anything. I was trying to upgrade to make sure I would get to the next gate on time.

Non stop on long haul is the way to go. Great experience

Seats comfortable, service and food very mediocre, staff not very attentive, worse than many other our flights with Delta.

Overall good experience; however, there was one flight attendant who was rather rough compared to everyone else. Everything else was good: entertainment, food. Delta keeps on delivering! Thank you!

Flight delayed for two and half hours and then canceled altogether due to mechanical issues. No mechanic onsite to fix so had to send one from LAX.

It was beautiful easy and smooth experience. Thank you. Will definitely get Delta for my next travel.

Check in process was terrible. Lady at counter didn’t know what she was doing

Delayed and took off even later than the scheduled delay time

The food quality sucks. One must starve if they do not eat flesh Or wheat based products Some variety would be expected. The trivial amount of snacks and or food is inhumane

We Left Calgary 1/2 hour late and that made for a tight connection in Denver. After arriving everything was done to help us make our connection. That was a great effort. Thank You United

Efficient all round, very good crew. Short flight so the food, of course, was just snacks

Overall, it was good. I was seating next to a wonderful lady and did not notice how time flew. Thanks

My flight was delayed about 1 1/2 hours in Chicago, but other then that it was a good flight.

The experience was great, the crew was very polite and hospitable. I will definitely make if my go to airlines.

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.

We landed 26 min early. It was awesome! Smooth ride too.

There is no snack and nit much that would be considered gluten free in yiur food selections. One of your snacks should be a gluten free cookie or small bar etc. maybe it was me but I didn’t see any free movies just internet connection and YouTube .

I like how spacious the plane was but I did not like the fact that there was no entertainment

No dogs! Can we have no dogs in the cabin? Why was there a yappy little dog behind me? Lucky I had ear plugs. Sorry for others without

In spite of purchasing premium, I felt it was perhaps the most uncomfortable seat I have flown in. The base was either broken or poorly made and had no support. Even placing pillows and blankets on the seat (1D aisle) didn’t help. It made for a long and mostly sleepless six hour flight. Crew also were very loudly talking to each other through the night making it very hard to sleep. It was purchased for the price, so I get the risk, but was not impressed.

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

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.

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.

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.

The free Wi-fi for Aeroplan members was a great touch. The time passed quickly. I found the seats seemed a little closer together than I remember. Not Air Canada's fault, but we were about 20 minutes late landing because the airport was too busy. We had to circle around for a while. The boarding and disembarking went very smoothly.

Extremely turbulent landing. Crew was friendly and plane comfortable. Airport and US pre clearance was understaffed

The airplane is way too tight, you can hardly enter into your row to sit.. more like kids seats than adults.

Wifi was great. Kind air crew and comfortable seating. Also liked the entertainment options.

First message when all on board was that we didnt have a pilot, then they found one, then it was something about the bridge something not working, they will either fix or do manually. Flight of course was leaving late with all the cruise guests worrying about making it to their ship in time. Then only some luggage made it off the ship. Around 15 to 20 people waiting. 45 min later arrived except mine. I asked the rep at the luggage conveyor, he asked me my name. Then said it was not picked up with the first batch so they put it in a room. I was going to take public transport but now worried about time so took a taxi that cost me $65 USD

The flight was very smooth and good. Boarding was fast, but the staff was just decently friendly.

Air Canada flight staff are in contact negotiations and they are less than happy and it show. The process of self checking baggage is less than desirable with lack of support staff to help

A sandwich and a drink would have been better thank a snack bar...

I liked the behaviour of the crew members.The flight was good.

I swear airplane seats keep getting smaller and smaller but everything else was great. Smooth sailing and we got in early.

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

Information on your arrival and departure airports

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