Cheap flights from Toronto to Seattle from C$ 145
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Toronto to Seattle departing on 18/9. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Alaska Airlines flights from Toronto to Seattle
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WestJet flights from Toronto to Seattle
Our best WestJet deals on Toronto to Seattle flight tickets
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How to get the cheapest flight ticket from Toronto to Seattle
Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip
What is the typical price of a round-trip flight between Toronto and Seattle?
What is the cheapest month to fly to Seattle?
If you aren’t able to travel to Seattle during the month of February, then flying in January is also cheap. Prices for this month can be found on momondo for an average of C$ 361.
What is the cheapest day to depart on your flight to Seattle?
Our data shows that Thursday is the least expensive day to fly to Seattle. Tickets to fly out on this day can be as low as C$ 547. If your travel schedule is flexible, try to avoid departing on a Sunday because tickets tend to average around C$ 715. These prices are subject to change though, so be sure to set up a Price Alert for flights to Seattle.
What is the cheapest time of day to depart on your flight to Seattle?
Our most recent data shows that the best time of day to fly to Seattle is in the evening. Flights from Toronto to Seattle during this time can be as low as C$ 503. Flights in the morning are often more expensive with an average ticket price of C$ 765.
What is the cheapest Toronto to Seattle/Tacoma Intl flight route?
Fly from Toronto Pearson Intl to Seattle/Tacoma Intl for the best Toronto - Seattle/Tacoma Intl flight prices
How far in advance should I book a flight to Seattle?
You are more likely to see cheaper flights to Seattle from Toronto when booking 7 weeks ahead of your departure date. In general, you can expect to find flights to Seattle for around C$ 492 when searching 7 weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Seattle from Toronto for as low as C$ 428 on momondo.
What cabin class options are available on Toronto to Seattle/Tacoma Intl flights?
There are 4 cabin classes available to choose from on Toronto to Seattle/Tacoma Intl flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.
What is the cheapest airline that flies from Toronto to Seattle/Tacoma Intl?
Alaska Airlines, WestJet, and Air Canada are the most popular carriers operating from Toronto to Seattle/Tacoma Intl
Which airlines fly to Seattle?
Alaska Airlines, Air Canada and WestJet are the top three most popular airlines that fly to Seattle from Toronto according to our data. Alaska Airlines is the first choice among our users, with 36% of people opting to fly with this airline when travelling to Seattle. Keep in mind that there are 6 different airlines that fly to Seattle on a routine basis, so you have a few additional options to choose from.
How many flights depart from Toronto to Seattle on average per day?
The number of flights available between Toronto and Seattle is 5 per day as of June 2025. The most frequent departure time is 8:00a.m., with 64% of daily flights leaving at noon.
How many flights depart from Toronto to Seattle on average per week?
As of June 2025, 35 flights take off from Toronto and land in Seattle each week. The most common flight departure day for this route is Fri, with 17% of weekly flights taking off on this day.
When to book flights from Toronto to Seattle
Cheap Toronto to Seattle (YTO to SEA) flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Toronto to Seattle
How far is Toronto to Seattle/Tacoma Intl by plane?
The distance between Toronto and Seattle/Tacoma Intl is about 3323.4 km. A reasonable flight in good conditions will take 5h 15m.
When did momondo last update prices for flights from Toronto to Seattle/Tacoma Intl Airport?
Prices for flights from Toronto to Seattle/Tacoma Intl Airport are refreshed on a daily basis.
How many operators does momondo search for flights from Toronto to Seattle/Tacoma Intl Airport?
As of June 2025, there are 6 operators available to choose from for flights from Toronto to Seattle/Tacoma Intl Airport.
How old do you have to be to fly from Toronto to Seattle/Tacoma Intl Airport?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Toronto to Seattle/Tacoma Intl Airport.
What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?
The travel and health documents required for your trip to Seattle/Tacoma Intl Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Seattle/Tacoma Intl Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.
What is the most popular plane model from Toronto to Seattle?
Based on momondo bookings for this flight route, the most popular plane model on flight routes from Toronto to Seattle is Airbus A220-300 (43.32% of total bookings). The next most popular plane models are Boeing 737 MAX 8 (26.23%), Boeing 737-900 Passenger/BBJ3 (winglets) (12.11%), and Boeing 737 MAX 9 (4.16%).
What is the most popular airline from Toronto to Seattle?
Based on momondo bookings for flights between Toronto and Seattle, the leading airline is Alaska Airlines, making up 34% of the total bookings. Other popular airlines include Air Canada with 30%, WestJet with 27%, and United Airlines with 7%.
Best airlines flying from Toronto to Seattle
Compare and see reviews for airlines that fly from Toronto to Seattle with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom C$ 187 | Free Cancellation | Rating 7.2 2,873 reviews | |||
| PriceFrom C$ 326 | Free Cancellation | Rating 8.0 10,000 reviews | |||
| PriceFrom C$ 356 | Free Cancellation | Rating 7.1 9,554 reviews | |||
| PriceFrom C$ 357 | Free Cancellation | Rating 7.4 8,801 reviews | |||
| PriceFrom C$ 367 | Free Cancellation | Rating 8.0 7,963 reviews | |||
| PriceFrom C$ 404 | Free Cancellation | Rating 7.8 2,501 reviews |
Alaska Airlines Flights From Toronto to Seattle
Alaska Airlines operates around 5 flights from Toronto to Seattle every week. The average price of these flights found in the last 72 hours has been C$ 367, but momondo users have found Alaska Airlines deals from Toronto to Seattle from as low as C$ 240 round-trip. Alaska Airlines has been scored 8.0/10 in 10,000 reviews.
Hawaiian Airlines Flights From Toronto to Seattle
Hawaiian Airlines is also a popular choice for this route. Hawaiian Airlines flight deals for Toronto to Seattle start from as low as C$ 297 round-trip, depending on your selected dates, with average Hawaiian Airlines deals seen on momondo around C$ 336. Hawaiian Airlines operates 7 flights to Seattle from Toronto in an average week. Users have rated it 7.8/10 across 2,500 reviews.
Travelling to a place near Seattle?
Book flights to Seattle if you plan to visit one of these locationsWhy use momondo?
Why should I use momondo to find a flight deal from Toronto to Seattle?
It is quick and easy to find Toronto to Seattle flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Seattle that suits you.
Can I find flights from Toronto to Seattle with flexible booking policies on momondo?
Flights from Toronto to Seattle with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.
How can momondo help me find flights from Toronto to Seattle?
momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Toronto to Seattle.
I’m not ready to book a flight from Toronto to Seattle right now. Can momondo alert me if prices change?
If you are simply researching potential flights to Seattle, momondo offers a useful price alert feature which will track prices for flights to Seattle from Toronto and alert you when they change.