YTO - SEA

C$ 177 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 1/6. 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.
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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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Cheap Flight Deals from Toronto to Seattle (YTO-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.

Recent round-trip flight deals from Toronto to Seattle

KAYAK's recommended round-trip 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
6:00 a.m. - 12:58 p.m.YKF-SEA
9h 58m1 stop
1:50 p.m. - 12:46 a.m.SEA-YKF
7h 56m1 stop
C$ 325WestJet
Find Deal
Wed, 30 Apr - Sat, 31 May
6:00 a.m. - 12:58 p.m.YKF-SEA
9h 58m1 stop
2:05 p.m. - 12:46 a.m.SEA-YKF
7h 41m1 stop
C$ 341WestJet
Find Deal
Sat, 24 May - Sun, 1 Jun
4:45 p.m. - 6:59 p.m.YYZ-SEA
5h 14mdirect
7:15 a.m. - 3:00 p.m.SEA-YYZ
4h 45mdirect
C$ 362Alaska Airlines
Find Deal
Sat, 26 Apr - Tue, 29 Apr
7:20 p.m. - 9:41 p.m.YYZ-SEA
5h 21mdirect
6:00 a.m. - 1:57 p.m.SEA-YYZ
4h 57mdirect
C$ 414Air Canada
Find Deal
Thu, 24 Apr - Wed, 30 Apr
4:45 p.m. - 6:59 p.m.YYZ-SEA
5h 14mdirect
7:15 a.m. - 3:00 p.m.SEA-YYZ
4h 45mdirect
C$ 427Alaska Airlines
Find Deal
Thu, 24 Apr - Sun, 27 Apr
12:25 p.m. - 7:37 p.m.YTZ-SEA
10h 12m1 stop
7:20 a.m. - 7:50 p.m.SEA-YTZ
9h 30m1 stop
C$ 432Air Canada
Find Deal
Sat, 24 May - Mon, 2 Jun
7:20 p.m. - 9:41 p.m.YYZ-SEA
5h 21mdirect
5:14 a.m. - 10:51 p.m.SEA-YYZ
14h 37m1 stop
C$ 457United Airlines
Find Deal
Thu, 24 Apr - Wed, 30 Apr
8:30 a.m. - 10:51 a.m.YYZ-SEA
5h 21mdirect
11:23 p.m. - 5:09 p.m.SEA-YYZ
14h 46m1 stop
C$ 458United Airlines
Find Deal
Wed, 28 May - Fri, 30 May
7:21 p.m. - 11:24 p.m.YYZ-SEA
7h 03m1 stop
7:30 a.m. - 9:57 p.m.SEA-YYZ
11h 27m1 stop
C$ 461Delta
Find Deal
Thu, 24 Apr - Wed, 30 Apr
12:54 p.m. - 8:50 p.m.YYZ-SEA
10h 56m1 stop
12:45 a.m. - 11:59 a.m.SEA-YYZ
8h 14m1 stop
C$ 467Delta
Find Deal
Sat, 26 Apr - Fri, 2 May

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 Toronto to Seattle flight route?

The cheapest price for flight routes found by users searching on KAYAK in the last 2 weeks for round-trip flights from Toronto to Seattle.
Our data shows that the cheapest route for a return flight from Toronto to Seattle cost C$ 397 and was between Toronto Pearson Intl Airport (YYZ) and Seattle (SEA). On average, the best prices are found if you fly this route. The average price for a return flight for this route is C$ 397.

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

The average price of all round-trip flights from Toronto to Seattle clicked on KAYAK for each day over the last 12 months.
For Toronto to Seattle, Thursday is the cheapest day to fly on average and Sunday is the most expensive. Flying from Seattle back to Toronto, the best deals are generally found on Sunday, with Tuesday being the most expensive.

What is the cheapest month to fly from Toronto to Seattle?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Toronto 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 to Seattle is February, where tickets cost C$ 377 (return) on average. On the other hand, the most expensive months are May and July, where the average cost of round-trip tickets is C$ 681 and C$ 669 respectively.

Can I save money by flying with a layover from Toronto 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 1 stop layover the cheapest option at C$ 1,635 on average.

How far in advance should I book a flight from Toronto 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 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 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

Low season

January

High season

August

Cheapest flight

C$ 177
Best time to beat the crowds (32% less expensive on average)
Most popular time to fly (5% more expensive on average)
Flight from Toronto Region of Waterloo Intl 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 flights from Toronto to Seattle

  • Is there accommodation at Seattle-Tacoma Airport?

    There are several hotels situated to the east of Seattle-Tacoma Airport where travelers can find comfortable accommodation. Top-rated hotels like Hilton Seattle Airport & Conference Center, Seattle Airport Marriott, and the Radisson Hotel provide top-notch service to travelers.

  • Which services for passengers with limited mobility are available at Toronto Pearson Airport?

    Apps like BlindSquare and Aira are available at Toronto Pearson Airport to help those with sight loss to navigate through the vast airport with ease. There are also accessible self-service check-in kiosks, wheelchair-accessible restrooms, and an in-terminal shuttle service.

  • Which transportation means are available to Toronto Pearson Airport from Downtown Toronto?

    The Union Pearson Express train provides a fast and efficient transportation means to Toronto Pearson Airport. The public transit buses, rideshares, taxis, and shuttles offer alternative means of transport to the bustling Toronto Pearson Airport.

  • Are there special services at Seattle-Tacoma Airport for VIP passengers?

    VIP passengers receive special treatment at Seattle-Tacoma Airport. Upon arrival, VIPs get the meet and greet service, after which they are escorted to the VIP lounge, which has plenty of refreshments and exclusive services.

  • How do I get to Seattle city center from Seattle-Tacoma International Airport (SEA)?

    There are seven ways to get from Seattle-Tacoma International Airport (SEA) to the city center. You can use a town car, shuttle, taxi, bus 156, bus 150, or a tram to drive to the city center. The bus is the recommended means, with Flixbus operating between the destinations regularly. However, a shuttle is the fasted means.

  • What are the parking options at Toronto Pearson International Airport (YYZ)?

    You'll need a parking lot if you're accessing the YYZ with your vehicle. You can park and Park'N Fly with both valet and self-parking options. Value Park Lot, Dixon Park Lot, and Aerospot Toronto outdoor parking offer affordable parking charges.

  • Which hotels are near Seattle-Tacoma International Airport (SEA)?

    Passengers arriving late at the airport shouldn’t worry about where to spend their night since the airport houses several hotels. Skyway Inn & Airport Parking, Rodeway, and Motel 6 Seattle-WA, Airport are the top hotels near the airport. However, its proximity makes Crowne Plaza Seattle Airport Hotel more convenient. It's located across the sky bridge.

  • What are the flight options for passengers traveling from Toronto to Seattle?

    Several airlines offer one-stop flights from Toronto Pearson International Airport (YYZ) to Seattle-Tacoma International Airport (SEA). Air Canada, Delta, WestJet, and United Airlines are some carriers you’ll encounter.

  • What is the cheapest flight from Toronto to Seattle?

    In the last 3 days, the lowest price for a flight from Toronto to Seattle was C$ 124 for a one-way ticket and C$ 228 for a round-trip.

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

    When flying out of Toronto you will be using one of these airports: Toronto Region of Waterloo Intl, Toronto Island, or Toronto Pearson Intl. You will be landing at 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, Jazz, Delta, 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.

  • 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 C$ 578 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 C$ 646 and an overall rating of 8.0.

  • 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.

  • 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

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

  • Looking for a cheap flight? 25% of our users found flights on this route for C$ 318 or less one-way and C$ 513 or less round-trip.
  • If you want to fly nonstop to Seattle from Toronto Pearson Airport (YYZ), you can find some direct flights operated by Air Canada. There are also many other options that require at least one or two layovers at either Dallas Fort Worth, Charlotte Douglas, Detroit, Chicago, Denver, Atlanta, San Antonio, Sacramento, or Salt Lake City.
  • You can take the light rail from Seattle-Tacoma Airport (SEA), but if you have luggage and want a more convenient transportation means, rideshares or cabs are a great choice. Shuttles like the Shuttle Express are affordable alternative transportation means to Downtown Seattle.
  • Take a trip back in time to the Jurassic period while at Toronto Pearson Airport. The impressive dinosaur model displays are found in Terminal 1.
  • Seattle-Tacoma Airport has several lounges for travelers looking for a quiet place to relax during lengthy layovers. The cozy Alaska Lounge, located on Concourse C and D, is accessible for about C$ 63. The lounge has runway views, a pancake machine, and a Starbucks coffee machine.
  • Toronto Pearson Airport has multiple parking lots for those looking for a safe place to leave their vehicle. The long-term parking lot charges around C$ 63 a day. The Daily Park is available at around C$ 31, the Express Park at around C$ 41, and the Value Park at about C$ 25 a day.
  • Seattle-Tacoma Airport does provide luggage trolleys for a small fee. If you wish to leave your bag shortly, there is a baggage storage facility at the airport’s terminal building reclaim section.
  • Those bringing the entire family on their trip to Seattle-Tacoma Airport have will appreciate the family toilets, the baby rooms on Concourse A, nursing rooms at Concourse A and D, and kids play zones near the central terminal. In case you bring pets with you, the pet relief area on Concourse D will come in handy.
  • Toronto Pearson Airport serves as a hub for several airlines operating flights from Toronto to Seattle, including WestJet, American, and Delta Air Lines.
  • Travellers moving from Toronto to Seattle have a couple of airports. Still, the journey is likelier to begin at Toronto Pearson International Airport (YYZ) and end at Seattle-Tacoma International Airport (SEA). The two major airports in Toronto and Seattle, respectively, are the hubs of international flights between the two destinations.
  • Passengers traveling to Seattle through Toronto Pearson International Airport (YYZ) have several options when it comes to getting into the airport. You can access the airport Terminal 3 by train, which takes about 43 minutes, or a bus, taking approximately the same time. However, the fastest means is by taxi, 22 minutes.
See more tips

Prefer to fly direct from Toronto to Seattle?

Find which airlines fly direct from Toronto to Seattle/Tacoma Intl Airport, which days they fly and book direct flights.

Direct departures

Toronto 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 nonstop flights

Direct returns

Seattle/Tacoma Intl to Toronto

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 nonstop flights
See more nonstop flights

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 9798 reviews
7.9Comfort
8.5Crew
7.1Food
8.2Boarding
7.1Entertainment
Airline reviews

They always change the schedule. My original flight got canceled. They put me up in the air flight. I had to stay seven hours in Seattle. That is bad.

4.0 OkayAnonymous, Mar 2025PHX - SEA
Read more Alaska Airlines reviews

They always change the schedule. My original flight got canceled. They put me up in the air flight. I had to stay seven hours in Seattle. That is bad.

I had a great travel experience with Alaska. The agents and cabin crew were all so pleasant and helpful. The plane was clean and comfortable. The connecting flights went smoothly even with some minor delays. All in all, it was nice not to be upset with the journey. I say that because over the last few years all my travel has been on Delta and American, and always involved cranky employees and flight issues. I wish Alaska flew everywhere I need to go. Will definitely fly Alaska every time I have a choice. Thanks for helping me look forward to traveling again.

Disappointed that there were no TV screens to watch a movie on the six hour flight. Disappointed that the plane did not have the right adapter to connect my phone and my iPad and charge them.

Ted. F/A in fist class did a great job! Very nice

The plane was freezing and no blanquets available unless you buy them. My screen was bad so I couldn’t watch any entertainment.

The flight attendants on this flight were fabulous! I flew with my two kids and it was their first flight ever. One attendant in particular learned it was my kids first flight so she took extra care of them. She brought them some wings and extra cookies which made the experience positive and memorable. Thank you so much!

Have I received a refund yet? They wouldn’t let me on the airplane it took hours. I lost my bag that told me what I needed to do to bring the dogs, and then they kept changing their minds.

Flying in both directions across country the gate designated on my boarding pass was wrong. From w to e across the country the passenger next to me coughed the entire way.

Even though we checked in, checked bags, and went through security, I was told at the gate that I hadn’t checked in. I was pulled aside and had to verify my identity yet again. Otherwise, the flight was fine.

Everything smooth (including the landing) and on time. Easy. Thanks.

The Dekta Rep that checked us in was great. She's very personable, pleasant, and can tell she enjoys her job.

The plane was old with small storage areas that had problems closing/latching and not enough storage for everyone, and worn, damaged seats. Service was great but feel a little unsafe on such well used planes.

Terrible and im avoiding them in the future. My initial flight was delayed causing me to rebook my flight and when speaking with the representative to rebook I explained this is the second time my flights were delayed and they did nothing to help me. I wasn't booked to comfort plus or given a voucher or anything. I was almost late for my meeting that I needed to attend on Monday because of the games delta played delaying my flights even more and putting me in the very back of the plane next to an extremely intoxicated passenger

Flights on time. .Ride was as comfortable as can be expected in steerage. Luggage arrived at destination. Attendants were fairly friendly.

Great staff. Wifi is terrible. Signing up for skylines is a painstaking process. Had to call customer service just to get my flight itinerary and confirmation sent to me. Consistent delays. A well staffed company that is run so poorly. Upper management needs to be renewed.

The WiFi didn't seem as fast as it normally is

Thank you for not flipping the plane on the run way. You guys get a 5 star rating for the flight!!!

The crew was wonderful and attentive. The seats near exit row were restrictive. Offer healthy snacks please

Delta is a premier airline so my expectations are most always met.

Flight left early and arrived early. the whole trip was excellent.

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)

We tried to upgrade to economy premium but were told this was not possible as we had booked through United Airlines (and Air Canada was operating the flight). This seemed silly given there was ample space in economy premium. Additionally, we had to wait almost 1.5 hours upon arrival to taxi to the gate. Otherwise, the crew were very pleasant and passengers were friendly.

It was my first time with United Airlines and I would say it was very good experience and best of all the flights were on time. Will definitely fly with United Airlines next time.

headphone jack didnt work for the first flight and not much variety

The seats on this flight were almost roomy enough to be the basic amount needed for human existence. I think my favorite part of this flight was it landed at an A gate, which was the most palatial part of Sea-Tac I've ever seen - a massive improvement from the S gates.

The seats on this flight were almost roomy enough to be the basic amount needed for human existence.

Plane 3 hours late. Missed connection. No help from gate staff. App horrible. Lost connection repeatedly. No service desk. Finally got help from young girl driving cart.

Not as good as expected Air Can needs to improve totally rated on internet as worst

The flight was delayed, it took longer than anticipated because of weather, and they broke my luggage.

Everything was good. Flight was on time, luggage pickup was quick. The staff were great. Could not ask for anything more.

It took 30 minutes to check in with the Westjet rep. They didn’t have enough seats and she needed to make a call… I am always “randomly” selected to be checked at security. Their “randomly “ selection system may need some updating. They treat people like criminals. It is not appropriate behavior.

Found the seats very crowded—too close together ! And waited a long time for our luggage All staff at both ends were excellent!!!

Flight cancelled and Kayak switched our return flight to a red eye. Ridiculous.

Will never book through you again. Very disappointed in the notices and action taken or provided when planes are rescheduled, enough to cause missed connections

Lost my luggage. Filed a report and there is no response. Received a phone call from another airline that said they had the bag and they did not know what to do with it

Very good over all , would have been nice to have entertainment on the flight

Absolutely the worst airline I have ever taken. They lost my baggage and told me my bag tags had been cancelled. When my bags arrived days later I had to pick them up at 3:15 am. My return flight was delayed another 6 hours and they broke my bag. Westjet does nothing to try and make it a better customer experience and all the customers services representatives I spoke with were useless and incompetent. Never flying westjet again.

Easy self checkin and baggage drop. No in seat entertainment, but wifi and app worked well

it's all good nothing you can do make better 😌

Single flights to Cancun purchased through third-party, initially had issues printing luggage labels with the lady at the airport Pearson… Was super friendly and assisted quickly despite being very busy

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!

flight was delayed 6 hours for weather, then cancelled because of the crash in toronto, but none of the links to cancel or rebook my flights are working

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

Other airlines flying from Toronto to Seattle

Flights from the other most popular airlines that fly from Toronto to Seattle according to KAYAK users. Prices are the lowest found on KAYAK over the last 7 days. Price and availability are not guaranteed.

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