Cheap flights from Seattle / Tacoma International to Toronto

Compare Seattle / Tacoma International to Toronto flight deals

Find the cheapest month or even day of the year to fly to Toronto

Book the best Toronto fare with no extra fees

Flight deals from Seattle / Tacoma International to Toronto

Looking for a cheap last-minute deal or the best round-trip flight from Seattle / Tacoma International Airport to Toronto? If you want to travel next month, round-trip fares start from $263. Find the lowest prices on one-way and round-trip tickets right here.

Find the cheapest month to fly from Seattle / Tacoma International to Toronto

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Seattle / Tacoma International to Toronto flights are currently cheapest in July.

Direct flights from Seattle / Tacoma International to Toronto

Alternative Seattle / Tacoma International to Toronto routes

Looking for the cheapest, fastest or easiest route from Seattle / Tacoma International to Toronto? You could fly into the following airports instead.

Seattle to Toronto: Flight information

The things to know before you go.
Cheapest flight found$244
Cheapest month to flyJuly
Average flight time4 hrs, 48 mins
Most popular airlineAlaska Airlines
Average flights per week44

Finding cheap flights from Seattle / Tacoma International to Toronto: Frequently asked questions

There are 4 airports in Toronto: Toronto Island, Toronto Pearson International, John C. Munro Hamilton, and Kitchener / Waterloo.
The best price we found for a round-trip flight from Seattle / Tacoma International to Toronto is $244. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
4 hours and 48 minutes is the average flight time from Seattle / Tacoma International to Toronto.
Alaska Airlines, United and Qatar Airways fly direct from Seattle / Tacoma International to Toronto.
There are 44 flights per week flying from Seattle / Tacoma International to Toronto, as of May 2026.
The cheapest month to fly from Seattle / Tacoma International to Toronto is usually July.
If you're flying from Seattle / Tacoma International Airport, the cheapest airport near Toronto is Toronto Pearson International – which is 20.4 km away from the center of Toronto. We've found flights to this airport from $244.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Seattle / Tacoma International Airport to Toronto on Sunday, July 26, 2026.
Yes – the average flight time is 4 hours and 48 minutes.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Toronto but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
We crunched all the numbers in our flight calendar, and it looks like the cheapest time to book a flight to Toronto is around 40 days in advance, so don’t leave your flight to the last minute.
In May, the average temperature is usually around 12°C. July is typically the warmest month in Toronto, when it usually averages around 25°C. You can expect the least rain in February. The coldest month is January, with temperatures averaging -8°C. The rainiest month is September.
Currently, WestJet and Air Canada offer the cheapest flight tickets to Toronto.

Traveling from Seattle-Tacoma International Airport (SEA) to Toronto: what you need to know

  • Expect to be traveling for 5 hours 25 minutes. On average, that's the duration of a direct flight from Seattle-Tacoma International Airport to Toronto.

  • The timezone in Toronto is UTC-5. The city is three hours ahead of Seattle, where Seattle-Tacoma International Airport is located.

  • With 13 flights a week between the two airports, Seattle-Tacoma International Airport (SEA) to Toronto Pearson International Airport (YYZ) is the most popular route. Air Canada operates the earliest flight at 06:00. If you prefer to get more out of your day before you fly, the last flight from SEA to YYZ is with Air Canada at 12:20.

  • Give yourself enough time to catch your SEA to Toronto flight. A good rule of thumb is to arrive at least two hours before international departures and an hour ahead for domestic flights.

  • You can expect bigger queues during popular months like July. Arriving up to four hours ahead of an international flight and two hours for domestic departures will give you plenty of time for security and boarding.

  • Begin your journey at SEA and fly nonstop to Toronto Pearson International Airport (YYZ). That's where you can expect to land when searching for Seattle-Tacoma International Airport to Toronto tickets.

  • Air Canada is a popular carrier that operates direct flights from Seattle-Tacoma International Airport to Toronto.

  • A stopover is the perfect opportunity to take a break from traveling and maybe even tick off a new city. When browsing for plane tickets from SEA to Toronto, uncheck the 'Direct flights only' box to see where you can visit along the way. Consider one of these popular options:

    • Orlando International Airport (MCO)

    • Minneapolis-Saint Paul International Airport (MSP)

    • Vancouver International Airport (YVR)

  • SEA is around 18 kilometers from central Seattle. If you're ride-sharing, driving or catching a cab from the center, it'll take 25 minutes or so to get there, depending on the traffic. If you're taking public transport, expect the trip time to be around 35 minutes.

  • In search of a hotel close to SEA? If you've booked an early flight from Seattle-Tacoma International Airport to Toronto, these accommodation options will put you moments from your departure gate:

  • 80% of flights leaving Seattle-Tacoma International Airport land at their destination according to schedule. Given its dependable on-time performance, you're unlikely to experience delays when jetting out of SEA.

How to find the cheapest flights from Seattle-Tacoma International Airport (SEA) to Toronto

  • $105 is the lowest price we've found for a one-way Seattle-Tacoma International Airport to Toronto flight. A round-trip ticket right now is $244. Depending on when you book and the availability, these fares may change.

  • Booking ahead of time is often the key to finding a cheap flight from SEA to Toronto. Airlines adjust prices based on demand, so the nearer you get to departure, the more it could cost you.

  • The 'Whole month' search tool will show you the cheapest tickets from Seattle-Tacoma International Airport to Toronto across every month. It's a great way to snap up a bargain if your dates aren't set in stone.

  • Picking up a cheap flight from SEA to Toronto couldn't be easier with Price Alerts. All you need to do is create one of these automatic notifications and we'll let you know when a lower fare pops up.

  • Pick your ideal departure and arrival times, number of stops and airlines with our filters. Then, sort the results for your flight from Seattle-Tacoma International Airport to Toronto by 'Best,' 'Cheapest' or 'Fastest.'

Airports in Toronto

Toronto Pearson International Airport (YYZ)

  • Toronto Pearson International Airport (YYZ) is around 27 kilometers from the center of Toronto. If you're grabbing a cab or a ride-share, the drive takes roughly 30 minutes.

  • Traveling to the center on public transport typically takes 25 minutes.

  • If you have a late flight from Seattle-Tacoma International Airport to Toronto, nothing beats the convenience of staying close to the terminal. Pick up your bags from the carousel and then be showered and sleeping soon after at one of these hotels near YYZ:

  • Lock in the best rate by booking your ride from Toronto Pearson International Airport around three weeks before your flight from SEA to Toronto.

Billy Bishop Toronto City Airport (YTZ)

  • The center of Toronto is about 3 kilometers from Billy Bishop Toronto City Airport (YTZ). After your flight from Seattle-Tacoma International Airport to Toronto has hit the runway and you've made your way out of the airport, expect a drive of around 10 minutes.

  • The journey will take about 20 minutes on public transport.

  • After stepping off your SEA to Toronto flight, rest your head at a hotel close to YTZ. These are some comfortable accommodation options that'll help you get into relaxation mode:

  • Call dibs on the best options. Reserving your ride from YTZ one week in advance often means better prices and a wider range of vehicles.

John C. Munro Hamilton International Airport (YHM)

  • John C. Munro Hamilton International Airport (YHM) is around 72 kilometers from the center of Toronto. It takes about 1 hour 10 minutes to reach the city center in a cab or ride-share once you've hopped off your flight from Seattle-Tacoma International Airport to Toronto.

  • Public transport can take you there in around 1 hour 50 minutes.

  • Enjoy an unhurried start to your trip by checking in to a hotel near YHM after your SEA to Toronto flight. Rest up after a long day of travel or just give yourself time to find your footing in a new place at:

  • Rental agencies sometimes offer promotions for early bookings, so secure your ride from YHM a few weeks in advance of your flight from Seattle-Tacoma International Airport to Toronto. A bit of planning goes a long way in savings.

Best time to go to Toronto

  • It's time to work out your dates for your flight from Seattle-Tacoma International Airport to Toronto. July is the most popular month to visit Toronto. If you like a quieter vibe, go in January.

  • Lock in a Seattle-Tacoma International Airport to Toronto plane ticket with a departure in July if you're eager to explore the city during its warmest month. Expect temperatures to range from 15ºC (59ºF) to 28ºC (82ºF).

  • Look for cheap tickets from SEA to Toronto in February if you'd rather travel during cooler conditions. Temperatures are at their lowest then, ranging between -15ºC (5ºF) and 3ºC (37ºF) on average.

More about Toronto

  • Once you've booked your flight from Seattle-Tacoma International Airport to Toronto, find a hotel that offers the right mix of comfort and location. Make one of these accommodation options your base for exploring Toronto:

  • There are so many things to explore in this city it can be tricky to know where to begin. The Top CN Tower, CN Tower and Royal Ontario Museum are leading attractions which should feature on any well-planned Toronto itinerary.

Explore more of Canada

  • You've seen Toronto, now it's time to discover other parts of Canada. Journey about 499 kilometers northeast to Montreal to tick off its top attractions. From Cirque du Soleil - KURIOS to Montreal Botanical Garden and Saint Joseph's Oratory of Mount Royal, you'll have a full itinerary ahead.

  • If you're ready to explore another well-known destination in Canada, head for Ottawa, roughly 354 kilometers northeast of Toronto. Rideau Canal National Historic Site, Parliament Hill and Rideau Canal, Locks 1 - 8 - Ottawa are among its highlights.

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.