Book Cheap United flight from Seattle (SEA) to Toronto (YYZ)

Find The Best Day to Book a Cheap United Flights From Seattle to Toronto

Cheapest United Flights from Seattle (SEA) to Toronto (YYZ)

The cheapest flights to Pearson Intl. found within the past 7 days were CA $454 round trip and one way. Prices and availability subject to change. Additional terms may apply.

Mon, Sep. 29 - Tue, Oct. 28
SEA
Seattle
YYZ
Toronto
CA $454 Roundtrip, found 4 days ago
CA $454
Roundtrip
found 4 days ago
Select United flight, departing Mon, Sep. 29 from Seattle to Toronto, returning Tue, Oct. 28, priced at CA $454 found 4 days ago

Frequently asked questions

Can I catch a flight from SEA to Pearson Intl. Airport (YYZ) right now?
It's always wise to find out about any travel advice reports and quarantine requirements in effect in your destination city. Ensure you check out the Covid-19 Travel Advisor for up-to-date info on catching a flight to Pearson Intl. Airport (YYZ) from SEA.
What terminal is United Airlines at Sea-Tac Airport?
If you're flying from Sea-Tac Airport to Toronto Pearson Airport, you'll probably be exiting the plane at terminal 1. We can't say for sure which terminal you'll be departing from — it's wise to consult your airline.
Are there United Airlines non-stop flights from SEA to YYZ?
Plan for at least one stopover when flying from Seattle - Tacoma Intl. Airport (SEA) to Toronto Pearson Airport, as United Airlines doesn't offer any direct flights on this route. While in transit, you might like to buy a newspaper or an interesting magazine from the airport bookstore to make the time go quicker.
How long is a United Airlines flight from SEA to YYZ?
Lose yourself in a movie or two, listen to some music or just recline your seat and drift off. Whatever interests you, you'll need to find a way to entertain yourself during the 5 hours and 36 minutes that it takes to journey from Sea-Tac Airport to Pearson Intl. Airport (YYZ) with United Airlines.
What type of aircraft does United Airlines fly from SEA to YYZ?
Secured a seat with United Airlines? You'll likely be flying aboard the Airbus A220-300 airplane on the SEA to YYZ route.
How many direct and indirect flights does United Airlines fly from SEA to YYZ?
You can choose from about 4 flights per day with United Airlines from Sea-Tac Airport to YYZ.
If I am not able to travel due to COVID-19, can I change my booking to a later date?
For more info about changing your flight to Toronton Pearson, please visit our Customer Service Portal.
What is the best day to buy a plane ticket?
This just in! Airfares offered on Thursdays tend to be the cheapest, according to flight demand on Travelocity in 2021. Tuesday and Wednesday prices are also good, but you may want to prepare your budget if booking during the weekend, as data shows that is when prices are generally at their highest.
What are the cheapest days to fly?
Frequent travelers may already know this, but earlier in the week can be the cheapest time to fly. In 2021, flights departing on a Monday were generally the cheapest of the week, whereas you may pay a premium for weekend flights when demand is usually high. On average, tickets were most expensive for Saturday departures, so if you need to fly out on a weekend, you might look for deals ahead of time.
How far in advance can you book a flight?
Trying to figure out how early you should book your flight? It's possible to start comparing international airfares on Travelocity up to 12 months in advance. However, it does depend on the carrier as not all airlines release their prices that far out. According to our 2021 flight demand trends, last minute planners can still bag a bargain with some of the cheapest fares appearing 0-2 weeks prior to their travel dates.*According to flight demand on Travelocity.com from January to December 2021. Savings are subject to change based on departure location, date and destination.

Grab a great United flight from SEA to YYZ 

To find a great deal on United flights with Travelocity, simply enter your origin and destination airports, pick your travel dates, and hit search. From here, you can sort by price, flight duration, and arrival/departure time. You can also filter to find nonstop flights. 

Flying United Seattle to Toronto gives you 1 fights to choose from. With that direct flight time of 40, you’ll be touching down before you know it.  

 

Find cheap flights with United between Seattle and Toronto 

United has a range of great fares on stacks of flights, and to find the most affordable for you, there are a few tricks you can try. Booking in advance, for example, is a great way to grab a fantastic deal. Also, choose the cheapest month, if you can. One-way flights from Seattle to Toronto with United are .  

The more flexible you are, the more affordable flights you’re likely to find. Consider one-way flights and connecting flights, as well as standard roundtrip and direct options. Even if you’re flying today, cheap last-minute flights are easy to find by entering your travel dates and hitting search.  

 

Reasons to book your United flights with Travelocity 

Travelocity makes it easy to book a seat, anywhere in the world. The vast inventory, fast search, and advanced filters put some of the best deals on the planet in one place. Whether you’re traveling on business, with friends, family, or on your own, take your pick from some fantastic options. And with free cancellation and pay later options, you can travel more and worry less.  

United Airports
Hop on a(n) United flight today by flying to many destinations out of these domestic and international airports:
Airport code
Country
Airport name
Number of flights
ORDUSAO'Hare Intl.227
DENUSADenver Intl.226
IAHUSAGeorge Bush Intercontinental136
IADUSAWashington Dulles Intl.100
SFOUSASan Francisco Intl.64
LAXUSALos Angeles Intl.23
EWRUSALiberty Intl.20
FRADEUFrankfurt Intl.19
NRTJPNNarita Intl.19
PEKCHNCapital Intl.16

Travelers ❤️ these 🏨 after their flight to Toronto

Hilton Toronto Airport Hotel & Suites

Hilton Toronto Airport Hotel & Suites

4 out of 5
5875 Airport Road, Mississauga, ON
Stay at this 4-star eco-certified hotel in Mississauga. Enjoy breakfast (surcharge), a free airport shuttle, and a fitness center. Our guests praise the pool ...
8.2/10 Very Good! (3,318 reviews)
"Clean; easy access."

Reviewed on Aug. 2, 2025

Hilton Toronto Airport Hotel & Suites
The Westin Toronto Airport

The Westin Toronto Airport

4 out of 5
950 Dixon Rd, Toronto, ON
Book a stay at this business-friendly hotel in Toronto. Enjoy free WiFi, 2 restaurants, and breakfast (surcharge). Our guests praise the helpful staff and the ...
8.6/10 Excellent! (1,014 reviews)
"Very good hotel close to Airport. Shuttle are not easy to come by airport. You must call them from airport. They will take 15-20 min"

Reviewed on Aug. 2, 2025

The Westin Toronto Airport
Holiday Inn Toronto - Int'l Airport by IHG

Holiday Inn Toronto - Int'l Airport by IHG

3.5 out of 5
970 Dixon Rd, Toronto, ON
Stay at this 3.5-star spa hotel in Toronto. Enjoy free WiFi, a full-service spa, and breakfast (surcharge). Our guests praise the helpful staff and the clean ...
8.2/10 Very Good! (1,944 reviews)
"*"

Reviewed on Aug. 2, 2025

Holiday Inn Toronto - Int'l Airport by IHG
Lowest nightly price found within the past 24 hours based on a 1 night stay for 2 adults. Prices and availability subject to change. Additional terms may apply.
*Price based on the lowest price found within past 24 hours and based upon one night stay for two adults over the next thirty days. Prices and availability subject to change. Additional terms may apply.