Cheap Flights from Toronto to Seattle

Compare Toronto to Seattle flight deals

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

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Flight deals from Toronto to Seattle

Looking for a cheap last-minute deal or the best return flight from Toronto to Seattle? Find the lowest prices on one-way and return tickets right here.

Seattle.SAR 470 per passenger.Departing Fri, 10 Oct.One-way flight with WestJet.Outbound indirect flight with WestJet, departs from Kitchener / Waterloo on Fri, 10 Oct, arriving in Seattle / Tacoma International.Price includes taxes and charges.From SAR 470, select.

Seattle.SAR 470 per passenger.Departing Tue, 12 Aug.One-way flight with WestJet.Outbound indirect flight with WestJet, departs from Kitchener / Waterloo on Tue, 12 Aug, arriving in Seattle / Tacoma International.Price includes taxes and charges.From SAR 470, select.

Seattle.SAR 472 per passenger.Departing Sat, 7 Jun.One-way flight with WestJet.Outbound indirect flight with WestJet, departs from Kitchener / Waterloo on Sat, 7 Jun, arriving in Seattle / Tacoma International.Price includes taxes and charges.From SAR 472, select.

Seattle.SAR 484 per passenger.Departing Tue, 29 Jul.One-way flight with WestJet.Outbound indirect flight with WestJet, departs from Kitchener / Waterloo on Tue, 29 Jul, arriving in Seattle / Tacoma International.Price includes taxes and charges.From SAR 484, select.

Seattle.SAR 485 per passenger.Departing Sun, 14 Sep.One-way flight with WestJet.Outbound indirect flight with WestJet, departs from Kitchener / Waterloo on Sun, 14 Sep, arriving in Seattle / Tacoma International.Price includes taxes and charges.From SAR 485, select.

Seattle.SAR 516 per passenger.Departing Thu, 29 May.One-way flight with WestJet.Outbound indirect flight with WestJet, departs from Kitchener / Waterloo on Thu, 29 May, arriving in Seattle / Tacoma International.Price includes taxes and charges.From SAR 516, select.

Seattle.SAR 569 per passenger.Departing Sat, 1 Nov.One-way flight with WestJet.Outbound indirect flight with WestJet, departs from Kitchener / Waterloo on Sat, 1 Nov, arriving in Seattle / Tacoma International.Price includes taxes and charges.From SAR 569, select.

Seattle.SAR 607 per passenger.Departing Tue, 10 Jun.One-way flight with United.Outbound direct flight with United departs from Toronto Pearson International on Tue, 10 Jun, arriving in Seattle / Tacoma International.Price includes taxes and charges.From SAR 607, select.

Find the cheapest month to fly from Toronto to Seattle

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

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Direct flights from Toronto to Seattle

Alternative Toronto to Seattle routes

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

Toronto to Seattle: Flight information

The things to know before you go.

Cheapest flight found	SAR 470
Cheapest month to fly	October
Average flight time	5 hrs, 21 mins
Most popular airline	Air Tahiti Nui
Average flights per week	152

Finding cheap flights from Toronto to Seattle: Frequently asked questions

How many airports are there in Seattle?

There are 4 airports in Seattle: Seattle Lake Union SPB, Seattle Boeing Fld, Seattle / Tacoma International, and Paine Field.

How much are return flights from Toronto to Seattle?

The best price we found for a return flight from Toronto to Seattle is SAR 842. 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.

How long does it take to fly from Toronto to Seattle?

5 hours and 21 minutes is the average flight time from Toronto to Seattle.

Which airlines fly direct from Toronto to Seattle?

Air Tahiti Nui, Air Canada and United fly direct from Toronto to Seattle.

How many flights are there a week from Toronto to Seattle?

As of May 2025, there are 38 flights per week flying from Toronto to Seattle.

When is the cheapest time to fly from Toronto to Seattle?

The cheapest month to fly from Toronto to Seattle is usually May 2025.

Which is the cheapest airport to fly into in Seattle?

If you're flying from Toronto, the cheapest airport near Seattle is Seattle / Tacoma International – which is 19.5 km away from the centre of Seattle. We've found flights into this airport from SAR 842.

Which upcoming date is cheapest to fly from Toronto to Seattle on?

After crunching the numbers on our flight calendar, we found that it is currently cheapest to fly from Toronto to Seattle on Tuesday, 15 July 2025.

Can I get a direct flight from Toronto to Seattle?

Yes – the average flight time is 5 hours and 21 minutes.

How can I get the best flight deal from Toronto to Seattle?

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 Seattle 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.

When is the best time to book flights to Seattle?

We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to Seattle is around 40 days in advance, so don’t leave your flight to the last minute.

What’s the weather like in Seattle?

In May, the average temperature is usually around 12°C. August is typically the warmest month in Seattle, when it usually averages around 23°C. You can expect the least rain in July. The coldest month is December, with temperatures averaging 0°C. The rainiest month is November.

Which is the cheapest airline to fly from Toronto to Seattle with?

The cheapest airline that flies to Seattle is WestJet. And the cheapest airline that flies to Seattle Boeing Fld Airport is Alaska Airlines.

How to find cheap flights to Seattle from Toronto

Looking for cheap tickets from Toronto to Seattle? Here are a few tips on how to secure the best flight price and make your journey as smooth as possible.

Simply hit 'search'. From British Airways to international carriers like Emirates, we compare all major airlines along with the most popular online travel agents to find the cheapest plane tickets from Toronto to Seattle. And with us there are no hidden fees - what you see is what you pay.
Compare flight deals to Seattle from Toronto from over 1,000 providers. Then choose the cheapest or fastest plane tickets.
Flex your dates to find the best Toronto-Seattle ticket prices. If you are flexible when it comes to your travel dates, use Skyscanner's 'Whole month' tool to find the cheapest month, and even day to fly to Seattle from Toronto.
Set up a Price Alert. You can easily track the fare of your cheap Toronto-Seattle flights by creating an alert. Whenever prices go down or up, you'll get an email or push notification to help make sure you get the best possible flight deal.
Fly without stops. Only interested in direct flights between Toronto and Seattle? Make sure to tick 'Direct flights only' when performing a search. If there are direct flights available on the route, these will appear in the results.
Find the cheapest Business class flights from Toronto and Seattle. We scour the internet for the best Business, Premium Economy and First Class flight fares to Seattle, too. Check the difference in price as you search – you might just chance upon a last-minute low fare. Note that not all cabin classes are available for every destination or airline.
Include nearby airports in your search. Widen your search for Toronto to Seattle flight deals by selecting the "add nearby airports" option. This will allow you to see flight prices for all the nearest airports at your departure point and your destination and could help you save next time you travel.

Combine your flight to Seattle from Toronto with hotels and car hire

Once you've secured your cheap flight ticket from Toronto to Seattle, discover the best prices and exclusive rates for hotels in Seattle or nearby. You can also compare hundreds of car hire companies in one go so that you get the best car hire price for your trip.