YYZ - SEA

£111 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 31/5. 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

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, 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 Toronto to Seattle, as well as popular online travel agencies
Travellers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

Save 26% 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.

Cheap Flight Deals from Toronto to Seattle (YYZ-SEA)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for return 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.

Recent return flight deals from Toronto to Seattle

KAYAK's recommended return flight deals from the most popular airlines that fly from Toronto to Seattle.
Discover the best prices for you by selecting your travel dates on KAYAK.
Choose your dates
WestJet Logo
06:45 - 12:31YYZ-SEA
8h 46m1 stop
WestJet Logo
07:05 - 06:12SEA-YYZ
20h 07m1 stop
£190WestJet
Find Deal
Fri, 6 Jun - Sun, 8 Jun
Alaska Airlines Logo
16:45 - 19:04YYZ-SEA
5h 19mdirect
Alaska Airlines Logo
07:23 - 15:00SEA-YYZ
4h 37mdirect
£202Alaska Airlines
Find Deal
Thu, 29 May - Mon, 2 Jun
Alaska Airlines Logo
16:45 - 19:04YYZ-SEA
5h 19mdirect
Alaska Airlines Logo
07:23 - 15:00SEA-YYZ
4h 37mdirect
£211Alaska Airlines
Find Deal
Wed, 21 May - Wed, 28 May
Delta Logo
15:59 - 20:30YYZ-SEA
7h 31m1 stop
Delta Logo
05:45 - 16:46SEA-YYZ
8h 01m1 stop
£212Delta
Find Deal
Wed, 17 Sep - Tue, 23 Sep
Delta Logo
17:50 - 22:25YYZ-SEA
7h 35m1 stop
Delta Logo
21:58 - 09:21SEA-YYZ
8h 23m1 stop
£217Delta
Find Deal
Thu, 12 Jun - Mon, 16 Jun
Delta Logo
17:50 - 22:25YYZ-SEA
7h 35m1 stop
Delta Logo
21:58 - 11:20SEA-YYZ
10h 22m1 stop
£218Delta
Find Deal
Thu, 12 Jun - Sun, 15 Jun
United Airlines Logo
08:25 - 10:45YYZ-SEA
5h 20mdirect
United Airlines Logo
23:50 - 11:49SEA-YYZ
8h 59m1 stop
£219United Airlines
Find Deal
Sun, 25 May - Sun, 1 Jun
 Logo
06:45 - 12:31YYZ-SEA
8h 46m1 stop
 Logo
07:23 - 15:00SEA-YYZ
4h 37mdirect
Fri, 6 Jun - Sun, 8 Jun
United Airlines Logo
19:00 - 00:59YYZ-SEA
8h 59m1 stop
United Airlines Logo
23:45 - 18:35SEA-YYZ
15h 50m1 stop
£251United Airlines
Find Deal
Mon, 16 Jun - Fri, 27 Jun
 Logo
19:45 - 00:10YYZ-SEA
31h 25m2 stops
 Logo
05:35 - 06:55SEA-YYZ
22h 20m2 stops
Fri, 6 Jun - Sun, 8 Jun

Expert advice for your flight from Toronto to Seattle

 
Snippets provided in this section are AI-generated based on a summarisation 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 specific 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.
Airports
YYZ

Pearson is known for long security queues. Arrive early: at least two hours for domestic and three for international flights.

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
Stefanie Waldek

Stefanie Waldek

Expert on 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 out at sea, likely en route to Antarctica or the Arctic.

Read more
Harriet Baskas

Harriet Baskas

Expert on 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, 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

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.

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 £202 (return) on average. On the other hand, the most expensive months are May and December, where the average cost of round-trip tickets is £342 and £339 respectively.

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. For the absolute cheapest price, our data suggests you should book 7 weeks before departure.

Good to know - Cheap tickets from Toronto to Seattle

Low season

March

High season

August

Cheapest flight

£111
Best time to beat the crowds (16% less expensive on average)
Most popular time to fly (10% more expensive on average)
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 return price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or returns 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 £148 for a one-way ticket and £253 for a return.

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

    Toronto airport is called Toronto Pearson Intl and the only airport in Seattle is Seattle/Tacoma Intl.

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

    All the following airlines offer inflight Wi-Fi service on the Toronto to Seattle flight route: Air Canada, Alaska Airlines, United Airlines, Delta, Jazz, WestJet, and American Airlines.

  • 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 direct flights from Toronto to Seattle on a daily basis.

  • 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 travellers 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 return ticket. You could then fly to Seattle with an airline and back to Toronto with another airline.

  • 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.

See more FAQs

Prefer to fly direct from Toronto to Seattle?

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, +3 more

Air Canada, Air Tahiti Nui, +4 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, +3 more

Air Canada, Air Tahiti Nui, +4 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, +3 more

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

Air Canada, Air Tahiti Nui, +5 more

Thursday

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

Air Canada, Air Tahiti Nui, +4 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, +3 more

Air Canada, Air Tahiti Nui, +4 more

Sunday

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

Air Canada, Air Tahiti Nui, +5 more

See more direct flights
See more direct flights

Top airline flying 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.
7.0
Air CanadaOverall score based on 9192 reviews
7.0Comfort
6.3Food
7.3Boarding
7.8Crew
6.8Entertainment
Airline reviews

Overall good experience. The flight from Toronto to Denver does not have entertainment - movies to watch.

10.0 ExcellentAnonymous, Apr 2025YYZ - DEN
Read more Air Canada reviews

Overall good experience. The flight from Toronto to Denver does not have entertainment - movies to watch.

Boarding was challenging as we had to use the stairs from the tarmac. Stairs are okay but a roller bag makes it challenging.

Ensure prepaid food arrangements are appropriately understood by flight crew of who purchased and who did not

All was fine. Weather was a bit stormy, but nothing kayak can do about that! 😊

I paid for a comfort class seat and was seated in economy.

My plane was cancelled and had to be rebook for the evening was not happy.

The flight was cancelled and we had to rebook on Porter to make our cruise the next day. Air Canada has not compensated. We won’t be flying with them again. This is the second time this has happened. Also the return flight was delayed 2 hours who knows why.

Separated me and my wife and wife’s sister in far apart different seats even though I booked them all together. Just scams after scams to make us pay more. Worst airline

If you want your flight to get delayed constantly for 13+ hours and given a 10 dollar food voucher the. I would say take air canada. Worst experience ever.

My flight was cancelled and I was left to figure out where to find a hotel, something to eat and how to get a new flight at 11:30pm. Wasted a day. Thanks, Air Canada!

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 hires and package deals with KAYAK.