$138 Cheap Flights from Toronto (YYZ) to Seattle (SEA)

View $138 flight on Tue, Nov 11, 2025Opens in a new window

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

Cheap Flights from Toronto to Seattle (YYZ-SEA)

Prices were available within the past 7 days and start at $138 for one-way flights and $227 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Air Canada
Fri, Oct 17 - Tue, Oct 28
YYZ
Toronto
SEA
Seattle
$227 Roundtrip, found 1 hour ago
$227
Roundtrip
found 1 hour ago
Select Air Canada flight, departing Fri, Oct 17 from Toronto to Seattle, returning Tue, Oct 28, priced at $227 found 1 hour ago
WestJet
Fri, Sep 26 - Thu, Oct 2
YYZ
Toronto
SEA
Seattle
$228 Roundtrip, just found
$228
Roundtrip
just found
Select WestJet flight, departing Fri, Sep 26 from Toronto to Seattle, returning Thu, Oct 2, priced at $228 just found
WestJet
Sun, Sep 14 - Fri, Sep 19
YYZ
Toronto
SEA
Seattle
$230 Roundtrip, found 2 days ago
$230
Roundtrip
found 2 days ago
Select WestJet flight, departing Sun, Sep 14 from Toronto to Seattle, returning Fri, Sep 19, priced at $230 found 2 days ago
Air Canada
Tue, Sep 9 - Mon, Sep 15
YYZ
Toronto
SEA
Seattle
$232 Roundtrip, just found
$232
Roundtrip
just found
Select Air Canada flight, departing Tue, Sep 9 from Toronto to Seattle, returning Mon, Sep 15, priced at $232 just found
Air Canada
Mon, Oct 20 - Sun, Oct 26
YYZ
Toronto
SEA
Seattle
$233 Roundtrip, found 3 days ago
$233
Roundtrip
found 3 days ago
Select Air Canada flight, departing Mon, Oct 20 from Toronto to Seattle, returning Sun, Oct 26, priced at $233 found 3 days ago
WestJet
Sat, Oct 25 - Sun, Nov 2
YYZ
Toronto
SEA
Seattle
$235 Roundtrip, found 2 days ago
$235
Roundtrip
found 2 days ago
Select WestJet flight, departing Sat, Oct 25 from Toronto to Seattle, returning Sun, Nov 2, priced at $235 found 2 days ago
Air Canada
Tue, Sep 2 - Fri, Sep 5
YYZ
Toronto
SEA
Seattle
$236 Roundtrip, found 2 hours ago
$236
Roundtrip
found 2 hours ago
Select Air Canada flight, departing Tue, Sep 2 from Toronto to Seattle, returning Fri, Sep 5, priced at $236 found 2 hours ago
United
Wed, Nov 26 - Fri, Nov 28
YYZ
Toronto
SEA
Seattle
$242 Roundtrip, found 2 days ago
$242
Roundtrip
found 2 days ago
Select United flight, departing Wed, Nov 26 from Toronto to Seattle, returning Fri, Nov 28, priced at $242 found 2 days ago
Alaska Airlines
Wed, Oct 8 - Sat, Oct 18
YYZ
Toronto
SEA
Seattle
$250 Roundtrip, found 15 hours ago
$250
Roundtrip
found 15 hours ago
Select Alaska Airlines flight, departing Wed, Oct 8 from Toronto to Seattle, returning Sat, Oct 18, priced at $250 found 15 hours ago
Porter Airlines
Wed, Aug 13 - Mon, Aug 18
YYZ
Toronto
PAE
Seattle
$474 Roundtrip, found 2 days ago
$474
Roundtrip
found 2 days ago
Select Porter Airlines flight, departing Wed, Aug 13 from Toronto to Seattle, returning Mon, Aug 18, priced at $474 found 2 days ago

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

September is typically the cheapest month to fly

From $229 - $323 per traveler.

Graph displaying average flight prices per month

Flights from Toronto (YYZ) to Seattle (SEA)
Origin airport
Pearson Intl.
Destination airport
Seattle - Tacoma Intl.
Airlines serving
Air Canada, Alaska Airlines, American Airlines, Delta, United, WestJet
Roundtrip price
$225
Distance
2055 mi
Average flight time
2 hours 22 mins

Toronto to Seattle Flights

The cheapest times to fly from Toronto to Seattle

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Toronto to Seattle are during the month of October. You can find some of the cheapest flights from Toronto to Seattle with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Toronto to Seattle

Sunday is one of the best days to book for cheap flights from Toronto to Seattle: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Toronto to Seattle

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Toronto to Seattle in 2025. You can also book with separate airlines for your outbound and return journeys, from $138 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Toronto to Seattle flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Toronto to Seattle airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from Pearson Intl. Airport (YYZ) to Seattle - Tacoma Intl. Airport (SEA) cost?
You can score cheap return flights from Pearson Intl. Airport (YYZ) to Seattle - Tacoma Intl. Airport (SEA) starting from $269. Book your seat and start your adventure. This information is based on the cheapest price found on Expedia for this return journey departing within the next three months. This airfare is for a Alaska Airlines flight leaving YYZ on July 16 2025 and touching down at SEA. The price was last updated on July 10 2025 and has not changed since.
What is the cheapest month to fly from YYZ to SEA?
The cheapest flights from YYZ to SEA are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
Which airlines fly direct from Pearson Intl. Airport (YYZ) to Seattle - Tacoma Intl. Airport (SEA)?
Fly directly from Pearson Intl. Airport (YYZ) to Seattle - Tacoma Intl. Airport (SEA) on an Alaska Airlines flight.
What is the cheapest airline that flies from YYZ to SEA?
With prices as low as $140 for a one-way flight from YYZ to SEA, Alaska Airlines is currently the cheapest carrier flying this route. This fare is based on the lowest price found on Expedia departing within the next three months. The flight takes off from YYZ on October 4 2025. Prices were last updated on July 10 2025 and have not changed since.
How many flights per day from Pearson Intl. Airport (YYZ) to Seattle - Tacoma Intl. Airport (SEA)?
Each day on average, 2 direct flights take off from Pearson Intl. Airport (YYZ) to Seattle - Tacoma Intl. Airport (SEA). Select the departure time that best suits your plans.
What are the most popular departure times for flights from Pearson Intl. Airport (YYZ) to Seattle - Tacoma Intl. Airport (SEA)?
The 7 PM departures from YYZ to SEA are typically the busiest. Prices can be higher for these popular slots. If you're hoping to save money, pick a less crowded time to fly.
What day of the week has the most flights from YYZ to SEA?
If you depart on a Tuesday, you'll get the largest range of choices for flights from Pearson Intl. Airport (YYZ) to Seattle - Tacoma Intl. Airport (SEA).
What is the earliest flight from Pearson Intl. Airport (YYZ) to Seattle - Tacoma Intl. Airport (SEA)?
The earliest flight leaving Pearson Intl. Airport (YYZ) is at around 4:20PM UTC-5. Catch this flight and you'll reach Seattle - Tacoma Intl. Airport (SEA) at approximately 6:43PM UTC-8. The entire trip takes 5h 23m.
How long does it take to fly from Pearson Intl. Airport (YYZ) to Seattle - Tacoma Intl. Airport (SEA)?
The average flight duration from YYZ to SEA is 5 hours and 24 minutes, covering a total distance of 2,100 mi.
What airline has the least delays from YYZ to SEA?
Alaska Airlines has the strongest track record for on-time direct flights from Pearson Intl. Airport (YYZ) to Seattle - Tacoma Intl. Airport (SEA), with an on-time score of 80%. Use the Expedia App to see your flight schedule before you jet off and get real-time alerts about any trip changes.
What is the best time to fly from Pearson Intl. Airport (YYZ) to Seattle - Tacoma Intl. Airport (SEA)?
To avoid possible delays on the Pearson Intl. Airport (YYZ) to Seattle - Tacoma Intl. Airport (SEA) route, aim to travel before 3 PM. Later departures have a 22% higher chance of being canceled.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
What airports do you fly into for Seattle from Pearson Intl. Airport (YYZ)?
Seattle - Tacoma Intl. Airport (SEA) is the only airport in Seattle with direct flights from Pearson Intl. Airport (YYZ). Consider the options and discover cheap fares on Expedia.
Is it cheaper to buy a plane ticket from Pearson Intl. Airport (YYZ) to Seattle - Tacoma Intl. Airport (SEA) last-minute?
Holding off until just before your departure to book your flight from YYZ to SEA often results in higher prices. While it's possible to find some last-minute deals, they're not always guaranteed. Keep your travel plans flexible to boost your chances of snagging a bargain.
Is it cheaper to book a YYZ to SEA flight and hotel package?
Compared with arranging flights and hotels separately, booking a YYZ to SEA flight and hotel package with Expedia could lead to significant savings. Better still, having everything in one easy place will take the hassle out of planning your trip. Just pick your flights and choose from our wide range of hotels, then customize your trip with extras like tours and car rentals.
Can I cancel or change the date of my flight from Pearson Intl. Airport (YYZ) to Seattle - Tacoma Intl. Airport (SEA)?
In most instances, you're able to reschedule or cancel your YYZ to SEA flight. However, there may be additional charges, especially if you booked over 24 hours ago. Check your itinerary for the airline's policies and fees on flight changes, or if you want more information, visit our Customer Service portal.

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*Available to One Key members.