Cheap flights from Toronto Pearson Intl Airport to Seattle from $131
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 Pearson Intl Airport to Seattle departing on 7/4. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
Discover deals from 900+ travel sites with momondo.
Save money when you book flights with momondo
Big names and deals
Big names and deals
Search 100s of travel sites to compare prices.Filter for what you want
Filter for what you want
Free Wi-Fi? Stopover? Instantly customize your results.Trusted and free
Trusted and free
We’re completely free to use - no hidden charges or fees.Price Alerts
Price Alerts
Not ready to book? to track prices.Find the cheapest flights from Toronto Pearson Intl Airport to Seattle
Cheap round-trip flights
Cheap one-way flights
Cheap last minute flights
Cheap direct flights
Air Canada flights from Toronto Pearson Intl Airport to Seattle
Our best Air Canada deals on Toronto Pearson Intl Airport to Seattle flight tickets
United Airlines flights from Toronto Pearson Intl Airport to Seattle
Our best United Airlines deals on Toronto Pearson Intl Airport to Seattle flight tickets
See travel insights to Seattle from
How to get the cheapest flight ticket from Toronto Pearson Intl Airport 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 cheapest month to fly to Seattle?
In general, February is the cheapest month to fly from Toronto Pearson Intl Airport to Seattle. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $269. If you don’t want to visit Seattle in February, then you should wait until January to fly from Toronto Pearson Intl Airport, when ticket prices are also cheap, with an average price of $279.
What is the cheapest day to depart on your flight to Seattle?
On average, the least expensive day to fly to Seattle from Toronto Pearson Intl Airport is on a Thursday. momondo users have found tickets for Thursday departures for as low as $418. However, this price may fluctuate depending on the airline, the season, and holidays. On the other hand, Sunday is the most expensive day to depart from Toronto Pearson Intl Airport because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $616.
What is the cheapest time of day to depart on your flight to Seattle?
Flying to Seattle from Toronto Pearson Intl Airport in the evening is the least expensive time of day to depart. momondo users have found prices as low as $359 when looking at flights departing in the evening. Flights to Seattle are more costly at noon, with an average ticket price of $539. Departure times at noon fall within the peak daily travel times, which is why tickets can be more expensive.
What is the cheapest Toronto Pearson Intl to Seattle/Tacoma Intl flight route?
Fly from Toronto Pearson Intl to Seattle/Tacoma Intl for the best Toronto Pearson Intl - 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 Pearson Intl Airport when booking 7 weeks ahead of your departure date. In general, you can expect to find flights to Seattle for around $362 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 Pearson Intl Airport for as low as $315 on momondo.
What cabin class options are available on Toronto Pearson Intl to Seattle/Tacoma Intl flights?
There are 4 cabin classes available to choose from on Toronto Pearson Intl 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 Pearson Intl to Seattle/Tacoma Intl?
WestJet, Alaska Airlines, and Air Canada are the most popular carriers operating from Toronto Pearson Intl to Seattle/Tacoma Intl
What airlines fly to Seattle?
Air Canada, Alaska Airlines and WestJet are the top three most popular airlines that fly to Seattle from Toronto Pearson Intl Airport according to our data. Air Canada is the first choice among our users, with 37% of people opting to fly with this airline when traveling to Seattle. Keep in mind that there are 5 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 Pearson Intl Airport to Seattle on average per day?
As of June 2025, 4 flights take off from Toronto Pearson Intl Airport and land in Seattle each day. The most common flight departure time for this route is 8:00AM, with 64% of daily flights taking off at noon.
How many flights depart from Toronto Pearson Intl Airport to Seattle on average per week?
The number of flights available between Toronto Pearson Intl Airport and Seattle is 29 per week as of June 2025. The most frequent departure day is Mon, with 17% of weekly flights leaving on this day.
When to book flights from Toronto Pearson Intl Airport to Seattle
Cheap Toronto Pearson Intl Airport to Seattle (YYZ to SEA) flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Toronto Pearson Intl Airport to Seattle
How far is Toronto Pearson Intl to Seattle/Tacoma Intl by plane?
The distance between Toronto Pearson Intl and Seattle/Tacoma Intl is about 2053.4 mi. In terms of flight time, this usually takes a little over 5h 19m.
When did momondo last update prices for flights from Toronto Pearson Intl Airport to Seattle/Tacoma Intl Airport?
Prices for flights from Toronto Pearson Intl Airport to Seattle/Tacoma Intl Airport were last updated today.
How many operators does momondo search for flights from Toronto Pearson Intl Airport to Seattle/Tacoma Intl Airport?
The number of operators available for flights from Toronto Pearson Intl Airport to Seattle/Tacoma Intl Airport is 5 as of June 2025.
How old do you have to be to fly from Toronto Pearson Intl Airport to Seattle/Tacoma Intl Airport?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Toronto Pearson Intl Airport to Seattle/Tacoma Intl Airport.
What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?
The required travel and health documents for your Seattle/Tacoma Intl Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Seattle/Tacoma Intl Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.
What is the most popular plane model from Toronto Pearson Intl Airport to Seattle?
momondo data reveals that the most frequently booked plane model on the route from Toronto Pearson Intl Airport to Seattle is Airbus A220-300, representing 47.30% of all bookings. The subsequent popular models are Boeing 737 MAX 8 at 23.98%, Boeing 737-900 Passenger/BBJ3 (winglets) at 10.56%, and Embraer 195 E2 at 4.61%.
What is the most popular airline from Toronto Pearson Intl Airport to Seattle?
Based on momondo bookings for this flight route, the most popular airline on flight routes from Toronto Pearson Intl Airport to Seattle is Air Canada (35% of total bookings). The next most popular airlines are Alaska Airlines (33%), WestJet (15%), and United Airlines (12%).
Best airlines flying from Toronto Pearson Intl Airport to Seattle
Compare and see reviews for airlines that fly from Toronto Pearson Intl Airport to Seattle with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $227 | Free Cancellation | Rating 7.2 2,868 reviews | |||
| PriceFrom $240 | Free Cancellation | Rating 7.4 8,790 reviews | |||
| PriceFrom $246 | Free Cancellation | Rating 8.0 10,000 reviews | |||
| PriceFrom $250 | Free Cancellation | Rating 7.1 9,537 reviews | |||
| PriceFrom $292 | Free Cancellation | Rating 8.0 7,946 reviews |
Alaska Airlines Flights From Toronto Pearson Intl Airport to Seattle
Alaska Airlines flies from Toronto Pearson Intl Airport to Seattle around 2 times per week, with 10,000 momondo users rating the airline 8.0/10. The cheapest Alaska Airlines deal from Toronto Pearson Intl Airport to Seattle in the last 72 hours was $246 (round-trip), much lower than the average airfare cost of $415 for Alaska Airlines flights on this route.
United Airlines Flights From Toronto Pearson Intl Airport to Seattle
The best United Airlines deal for Toronto Pearson Intl Airport to Seattle flight tickets found on momondo in the last 72 hours was $240, round-trip. It should be noted that an average United Airlines flight deal for this route in this time was higher, at $448 round-trip. United Airlines operates 7 flights out of Toronto Pearson Intl Airport into Seattle in an average week, so prices vary by time and availability. 8,790 United Airlines reviews by users on momondo have scored the airline at 7.4/10.
Traveling 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?
momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Toronto to Seattle. Millions of users trust and use momondo every year so you are in good hands.
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?
Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Seattle from Toronto.
I’m not ready to book a flight from Toronto to Seattle right now. Can momondo alert me if prices change?
Price alerts on flights to Seattle from Toronto are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.