Cheap Flights from Toronto (YYZ) to Seattle (SEA)

View AU$247 flight on Tue, 7 Oct. 2025Opens in a new window

Popular airlines from Toronto Pearson Intl. Airport (YYZ) to Seattle-Tacoma International Airport (SEA)

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Cheap Flights from Toronto (YYZ) to Seattle (SEA)

Prices were available within the past 7 days for one-way flights and round trip tickets for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Wed, 10 Sep. - Wed, 17 Sep.
YYZ
Toronto
SEA
Seattle
AU$423 Return, found 6 days ago
AU$423
Return
found 6 days ago
Select United flight, departing Wed, 10 Sep. from Toronto to Seattle, returning Wed, 17 Sep., priced at AU$423 found 6 days ago
Air Canada
Wed, 10 Sep. - Wed, 17 Sep.
YYZ
Toronto
SEA
Seattle
AU$427 Return, found 6 days ago
AU$427
Return
found 6 days ago
Select Air Canada flight, departing Wed, 10 Sep. from Toronto to Seattle, returning Wed, 17 Sep., priced at AU$427 found 6 days ago
WestJet
Fri, 10 Oct. - Wed, 15 Oct.
YYZ
Toronto
SEA
Seattle
AU$439 Return, found 3 days ago
AU$439
Return
found 3 days ago
Select WestJet flight, departing Fri, 10 Oct. from Toronto to Seattle, returning Wed, 15 Oct., priced at AU$439 found 3 days ago
Air Canada
Wed, 10 Sep. - Wed, 17 Sep.
YYZ
Toronto
SEA
Seattle
AU$452 Return, found 6 days ago
AU$452
Return
found 6 days ago
Select Air Canada flight, departing Wed, 10 Sep. from Toronto to Seattle, returning Wed, 17 Sep., priced at AU$452 found 6 days ago
United
Wed, 10 Sep. - Wed, 17 Sep.
YYZ
Toronto
SEA
Seattle
AU$453 Return, found 6 days ago
AU$453
Return
found 6 days ago
Select United flight, departing Wed, 10 Sep. from Toronto to Seattle, returning Wed, 17 Sep., priced at AU$453 found 6 days ago
Air Canada
Fri, 10 Oct. - Wed, 15 Oct.
YYZ
Toronto
SEA
Seattle
AU$454 Return, found 3 days ago
AU$454
Return
found 3 days ago
Select Air Canada flight, departing Fri, 10 Oct. from Toronto to Seattle, returning Wed, 15 Oct., priced at AU$454 found 3 days ago
Air Canada
Wed, 10 Sep. - Wed, 17 Sep.
YYZ
Toronto
SEA
Seattle
AU$457 Return, found 6 days ago
AU$457
Return
found 6 days ago
Select Air Canada flight, departing Wed, 10 Sep. from Toronto to Seattle, returning Wed, 17 Sep., priced at AU$457 found 6 days ago
United
Wed, 10 Sep. - Wed, 17 Sep.
YYZ
Toronto
SEA
Seattle
AU$460 Return, found 6 days ago
AU$460
Return
found 6 days ago
Select United flight, departing Wed, 10 Sep. from Toronto to Seattle, returning Wed, 17 Sep., priced at AU$460 found 6 days ago
Delta
Wed, 10 Sep. - Wed, 17 Sep.
YYZ
Toronto
SEA
Seattle
AU$466 Return, found 6 days ago
AU$466
Return
found 6 days ago
Select Delta flight, departing Wed, 10 Sep. from Toronto to Seattle, returning Wed, 17 Sep., priced at AU$466 found 6 days ago
Alaska Airlines
Fri, 10 Oct. - Wed, 15 Oct.
YYZ
Toronto
SEA
Seattle
AU$520 Return, found 3 days ago
AU$520
Return
found 3 days ago
Select Alaska Airlines flight, departing Fri, 10 Oct. from Toronto to Seattle, returning Wed, 15 Oct., priced at AU$520 found 3 days ago

Find the cheapest month to fly from Toronto (YYZ) to Seattle (SEA)

October is typically the cheapest month to fly

From AU$352 - AU$488 per traveller.

Graph displaying average flight prices per month

Flight from Toronto to Seattle route information
Origin airport
Pearson Intl.
Destination airport
Seattle - Tacoma Intl.
Return price
AU$423
Distance
3288 km
Average flight time
2 hours 22 mins

Your quick guide to flights from Toronto to Seattle

Pick up great flights from Toronto to Seattle

With Expedia, you have your pick of 6 flights a day with 20 airlines covering flights from Toronto to Seattle. Whether you’re on a business trip, a family holiday or a luxury break, just enter your travel dates, hit search then check out your choice of flights. Select from return, one way or multi-city flights, and use the advance search tool if you want a direct or refundable flight. You can narrow your search to show you just your preferred cabin class and airline, too. It’s all easy. You can book direct flights from Toronto to Seattle that take around 5 hours.

Find cheap flights from Toronto to Seattle

From the great flight deals with prices currently ranging from AU$423 to AU$520, you can choose to see the cheapest flights first. Generally, you can book the cheapest flights from Toronto to Seattle around 4 to 6 weeks in advance. If your travel dates are flexible, try to avoid weekends and peak seasons – when you are more likely to grab the lowest prices. Even last minute, there are some impressive deals. The cheapest time to fly to Seattle is normally in September.

Reasons to book your flight from Toronto to Seattle with Expedia

Expedia makes it easy to find, book, and travel, with everything you need all in one place. When you enter your travel details, find fantastic deals just for you on flight tickets from Toronto to Seattle across all the main airline carriers, so you can save time, dollars, and hassle finding the perfect flight. If you think your plans could change, choose refundable flights so any changes won’t cost you more. Book your flight to Seattle right now and, if you join Expedia Rewards, you earn points this time and every time you travel with Expedia.

Frequently asked questions

How much is a flight from Toronto Pearson Airport to SEA?
If you're travelling from Toronton Pearson to SEA, round-trip journeys start from AU$423. This figure is based on fares quoted within the last 7 days on Expedia for flights departing within the next year, so don't hang about. Book today and save yourself both money and time. Prices and availability are subject to change. Additional terms apply.
Do I need to pay a cancellation fee if I cancel my flight from Pearson Intl. Airport (YYZ) to Sea-Tac Airport?
The majority of flights can be cancelled online, but whether you are charged a fee all comes down to your airline. If you do have to cancel your escape, follow the easy instructions in the Customer Service Portal.
How do I find cheap flights from Toronton Pearson to SEA that have flexible change policies?
Many airlines offer the option to reschedule your flight without a change fee. All you pay is the difference between the original flight and the new flight. When you're searching for Pearson Intl. Airport (YYZ) to SEA flights, you'll see a "no change fees" filter for you to select.
How far is the flight from Toronton Pearson to Sea-Tac Airport?
Around 3 300 kilometres separates Mississauga and SeaTac, so pack some in-flight entertainment to help you while away a couple of hours. That thrilling novel you haven't had time to start will be ideal.
Which airlines fly direct from Toronto Pearson Airport to SEA?
Air Canada (AC) will get you from Pearson Intl. Airport (YYZ) to Seattle - Tacoma Intl. Airport (SEA) safely and reliably. Take your pick of 30 flights every month along this route.
Are Toronto Pearson Airport to Sea-Tac Airport flight tickets cheaper when they're purchased at the last minute?
It is possible to nab great last-minute deals from Toronton Pearson to Sea-Tac Airport, but it's also possible to miss out entirely! As many airlines release seats up to 12 months in advance, it's worthwhile keeping an eye on fares early and being ready to book when you see a bargain. Expedia compares air carrier prices and updates flight deals often, so you can be certain you're always seeing the latest offers.

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