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

View AU$262 flight on Tue, 22 Sept 2026Opens 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.

WestJet
Sat, 5 Sept - Fri, 11 Sept
YYZ
Toronto
SEA
Seattle
AU$448 Return, found 3 days ago
AU$448
Return
found 3 days ago
Select WestJet flight, departing Sat, 5 Sept from Toronto to Seattle, returning Fri, 11 Sept, priced at AU$448 found 3 days ago
WestJet
Wed, 30 Sept - Wed, 7 Oct
YYZ
Toronto
SEA
Seattle
AU$486 Return, found 19 hours ago
AU$486
Return
found 19 hours ago
Select WestJet flight, departing Wed, 30 Sept from Toronto to Seattle, returning Wed, 7 Oct, priced at AU$486 found 19 hours ago
WestJet
Sun, 6 Sept - Fri, 11 Sept
YYZ
Toronto
SEA
Seattle
AU$491 Return, found 2 days ago
AU$491
Return
found 2 days ago
Select WestJet flight, departing Sun, 6 Sept from Toronto to Seattle, returning Fri, 11 Sept, priced at AU$491 found 2 days ago
WestJet
Sat, 5 Sept - Fri, 11 Sept
YYZ
Toronto
SEA
Seattle
AU$516 Return, found 3 days ago
AU$516
Return
found 3 days ago
Select WestJet flight, departing Sat, 5 Sept from Toronto to Seattle, returning Fri, 11 Sept, priced at AU$516 found 3 days ago
WestJet
Sun, 27 Sept - Sun, 4 Oct
YYZ
Toronto
SEA
Seattle
AU$528 Return, found 3 days ago
AU$528
Return
found 3 days ago
Select WestJet flight, departing Sun, 27 Sept from Toronto to Seattle, returning Sun, 4 Oct, priced at AU$528 found 3 days ago
WestJet
Wed, 30 Sept - Wed, 7 Oct
YYZ
Toronto
SEA
Seattle
AU$554 Return, found 19 hours ago
AU$554
Return
found 19 hours ago
Select WestJet flight, departing Wed, 30 Sept from Toronto to Seattle, returning Wed, 7 Oct, priced at AU$554 found 19 hours ago
Alaska Airlines
Sat, 5 Sept - Fri, 11 Sept
YYZ
Toronto
SEA
Seattle
AU$595 Return, found 3 days ago
AU$595
Return
found 3 days ago
Select Alaska Airlines flight, departing Sat, 5 Sept from Toronto to Seattle, returning Fri, 11 Sept, priced at AU$595 found 3 days ago
Delta
Sat, 24 Oct - Sat, 31 Oct
YYZ
Toronto
SEA
Seattle
AU$595 Return, found 2 days ago
AU$595
Return
found 2 days ago
Select Delta flight, departing Sat, 24 Oct from Toronto to Seattle, returning Sat, 31 Oct, priced at AU$595 found 2 days ago
Air Canada
Sat, 24 Oct - Sat, 31 Oct
YYZ
Toronto
SEA
Seattle
AU$638 Return, found 2 days ago
AU$638
Return
found 2 days ago
Select Air Canada flight, departing Sat, 24 Oct from Toronto to Seattle, returning Sat, 31 Oct, priced at AU$638 found 2 days ago
American Airlines
Sat, 26 Sept - Sat, 3 Oct
YYZ
Toronto
SEA
Seattle
AU$648 Return, found 5 days ago
AU$648
Return
found 5 days ago
Select American Airlines flight, departing Sat, 26 Sept from Toronto to Seattle, returning Sat, 3 Oct, priced at AU$648 found 5 days ago

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

November is typically the cheapest month to fly

From AU$452 - AU$682 per traveller.

Frequently asked questions

How much does a flight from Toronto, ON (YYZ-Pearson Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.) cost?
You can find one-way and return flights from YYZ to SEA with Expedia. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see our cheapest fares first, and use the Price Tracking tool to receive alerts when YYZ to SEA ticket fares go up or down.
What is the cheapest month to fly from Toronto, ON (YYZ-Pearson Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
The cheapest months to fly from YYZ to SEA are typically during off-peak season when demand is low. Traveling in off-peak or shoulder months is usually a good way to secure cheap tickets, just remember to avoid flying during holidays if you are able to. Use the calendar view in your search to see which months have low fares on this route.
Which airlines fly direct from Toronto, ON (YYZ-Pearson Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
Only one airline offers direct flights from Toronto, ON (YYZ-Pearson Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.). Air Canada operates 7 direct flights from Toronto, ON (YYZ-Pearson Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.) every week.
How do I find cheap flights from Toronto, ON (YYZ) to Seattle, WA (SEA)?
To find a cheap flight from Toronto, ON (YYZ) to Seattle, WA (SEA), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best airline to fly with from Toronto, ON (YYZ-Pearson Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
The best airline to fly with from Toronto, ON (YYZ-Pearson Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.) will differ from traveler to traveler. If you like to fly early, Alaska Airlines offers early morning flights. If price is the most important factor, Alaska Airlines typically offers the lowest fares. Air Canada offers the most daily flights from Toronto, ON (YYZ-Pearson Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.), which is great if flexibility is what you value most. The best carrier for this journey could also be the one you have a loyalty membership with, as flying with that airline or another airline within the same alliance could help you collect points or enjoy lounge access.
What is the best time to fly from Toronto, ON (YYZ-Pearson Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
The best time to fly is usually mid-week (Tuesday or Wednesday) and during early morning hours as flights tend to be cheaper, less crowded, and generally more on-time. Avoid major holidays and peak vacation seasons for smoother travel. Combining off-peak days and hours often gives the best combination of cost, comfort, and convenience.
How many flights per day from Toronto, ON (YYZ-Pearson Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
There are approximately 139 connecting flights per day from Toronto Pearson International (YYZ) to Seattle-Tacoma International (SEA). Some common connection points include O'Hare International (ORD), Calgary International (YYC), and Vancouver International (YVR).
What is the earliest flight from Toronto, ON (YYZ-Pearson Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
The earliest flight from Toronto, ON (YYZ-Pearson Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.) typically departs around 12:30 AM local time. This service is operated by Air Canada. This is a seasonal service active in June. An early departure like this can help you make the most of your time at your destination. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
What day of the week has the most flights from Toronto, ON (YYZ-Pearson Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
If you're flying from Toronto, ON (YYZ-Pearson Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.), you'll generally find the most flights on a Friday, with around 91 flights available. This gives you a good selection of options for your travel plans. Major airlines on this route include Air Canada, United, and American Airlines. Friday offers notably more flight options compared to other days of the week, making it a great day to find a flight that suits your schedule.
What are the most popular departure times for flights from Toronto, ON (YYZ-Pearson Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
The most popular departure times for flights from Toronto, ON (YYZ-Pearson Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.) are in the morning, from 6am to 9am. Many major carriers, including Air Canada, Delta and United, offer flights during this window. Many travellers prefer this because it allows for an early start to their journey, giving them more time to settle in at their destination.
How long does it take to fly from Toronto, ON (YYZ-Pearson Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
A nonstop flight from Toronto Pearson International Airport (YYZ) to Seattle-Tacoma International Airport (SEA) typically takes around 5 hours 30 minutes. This route covers a distance of approximately 3307 kilometres. If you opt for a one-stop flight, your travel time will be longer, usually around 9 hours 18 minutes, while flights with two or more stops generally take about 13 hours 30 minutes. Keep in mind that actual flight times can vary due to factors like wind patterns and air traffic, so it's always a good idea to allow for some extra time when planning your trip.
Can you fly business or first class from Toronto, ON (YYZ-Pearson Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
Yes, you can fly business class or first class between YYZ and SEA.Airlines that offer business class service on this route include:
  • Alaska Airlines
  • Air Canada
  • Delta
  • American Airlines
First class cabins are available on:
  • Alaska Airlines
  • Air Canada
  • Delta
  • Skywest Air
  • United
  • American Airlines
How do I earn miles on a Toronto, ON (YYZ) to Seattle, WA (SEA) flight with Expedia?
It's easy to earn miles on a Toronto, ON (YYZ) to Seattle, WA (SEA) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia.*Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
What airports do you fly into for Seattle, WA (SEA) from Toronto, ON (YYZ)?
If you're planning to travel to Seattle from Pearson Intl. (YYZ), you can fly directly into Seattle - Tacoma Intl. (SEA). Some flights may connect through major hubs like Edmonton Intl. (YEG), Calgary Intl. (YYC), or Macdonald-Cartier Intl. (YOW) before reaching Seattle. Compare routes and airports on Expedia to find the best flight options for your travel plans.
Is it cheaper to buy a plane ticket from Toronto, ON (YYZ) to Seattle, WA (SEA) at the last minute?
Typically, booking a last minute flight from Toronto, ON (YYZ) to Seattle, WA (SEA) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a Toronto, ON (YYZ) to Seattle, WA (SEA) flight and hotel package?
Securing a Toronto, ON (YYZ) to Seattle, WA (SEA) flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Toronto, ON (YYZ) to Seattle, WA (SEA)?
If you booked your Toronto, ON (YYZ) to Seattle, WA (SEA) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

Travel information

Origin airport
Pearson Intl.
Destination airport
Seattle - Tacoma Intl.
Airlines serving
Air Canada, Alaska Airlines, American Airlines, Delta, United, WestJet
Roundtrip price
AU$448
Distance
3288 km
Average flight time
2 hours 26 mins

Book with confidence

Your quick guide to flights from Toronto to Seattle

Pick up great flights from Toronto to Seattle

With Expedia, you have your pick of 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 hours.

Find cheap flights from Toronto to Seattle

From the great flight deals with prices currently ranging from AU$448 to AU$648, 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.

Your quick guide to flights from Toronto to Seattle

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*Available to Expedia members.