This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 7/12. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — YTO
26 Nov — 3 Dec1
Round-trip
1 adult
Economy
Round-trip
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from Seattle/Tacoma Intl to Toronto are usually found in January or November, booked 87 days in advance, depart on a Thursday or Wednesday and return on a Friday
Cheap flight deals from Seattle to Toronto
Enter your travel dates to find the best prices.
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Cheapest flights from Seattle to Toronto
Explore the most affordable flight options available from Seattle to Toronto. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 27 October 2026.
Mon 7/122:30 p.m. -
2 stops12h 15m
Mon 14/126:10 a.m. -
1 stop10h 30m
Deal found 23/10C$ 530
Sat 21/112:20 p.m. -
2 stops12h 25m
Tue 1/127:30 a.m. -
1 stop9h 10m
Deal found 24/10C$ 546
Tue 1/122:30 p.m. -
2 stops12h 15m
Tue 8/127:30 a.m. -
1 stop9h 10m
Deal found 25/10C$ 551
Sat 5/122:20 p.m. -
2 stops12h 25m
Sun 13/127:30 a.m. -
1 stop9h 10m
Deal found 24/10C$ 561
Tue 17/112:30 p.m. -
2 stops12h 15m
Mon 23/117:30 a.m. -
1 stop9h 10m
Deal found 27/10C$ 563
Sun 6/122:30 p.m. -
2 stops12h 15m
Thu 28/17:30 a.m. -
1 stop9h 10m
Deal found 24/10C$ 570
Tue 24/112:30 p.m. -
2 stops12h 15m
Tue 1/127:30 a.m. -
1 stop9h 10m
Deal found 27/10C$ 572
Tue 17/112:30 p.m. -
2 stops12h 15m
Tue 24/117:30 a.m. -
1 stop9h 10m
Deal found 27/10C$ 574
Fri 11/122:30 p.m. -
2 stops12h 15m
Fri 18/126:10 a.m. -
1 stop10h 30m
Deal found 26/10C$ 578
Fri 11/122:30 p.m. -
2 stops12h 15m
Sun 13/127:30 a.m. -
1 stop9h 10m
Deal found 26/10C$ 579
Best flights from Seattle to Toronto
Discover carefully curated flight deals from Seattle to Toronto that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated 27 October 2026.
Wed 9/128:33 a.m. -
Nonstop4h 32m
Wed 16/125:15 p.m. -
Nonstop5h 41m
Deal found 25/10C$ 676
Sat 9/18:43 a.m. -
2 stops12h 13m
Wed 20/19:45 a.m. -
2 stops12h 19m
Deal found 24/10C$ 880
Fri 27/118:31 a.m. -
Nonstop4h 34m
Wed 2/125:15 p.m. -
Nonstop5h 41m
Deal found 26/10C$ 690
Sun 29/118:58 p.m. -
2 stops8h 57m
Sat 5/127:35 a.m. -
1 stop10h 03m
Deal found 22/10C$ 908
Sun 13/1211:35 a.m. -
1 stop9h 06m
Wed 16/125:15 p.m. -
Nonstop5h 41m
Deal found 26/10C$ 826
Sat 9/19:05 a.m. -
2 stops11h 51m
Sat 23/16:30 a.m. -
2 stops12h 32m
Deal found 24/10C$ 918
Sat 21/118:31 a.m. -
Nonstop4h 34m
Mon 23/115:15 p.m. -
Nonstop5h 32m
Deal found 22/10C$ 889
Sat 19/127:56 p.m. -
2 stops12h 11m
Sun 3/16:10 a.m. -
1 stop11h 10m
Deal found 27/10C$ 1,026
Fri 25/128:33 a.m. -
Nonstop4h 32m
Wed 6/15:15 p.m. -
Nonstop5h 27m
Deal found 26/10C$ 936
Mon 21/128:33 a.m. -
Nonstop4h 32m
Thu 31/125:15 p.m. -
Nonstop5h 58m
Deal found 27/10C$ 1,028
Tue 10/118:19 a.m. -
Nonstop4h 46m
Thu 12/115:15 p.m. -
Nonstop5h 30m
Deal found 26/10C$ 1,028
Direct flights from Seattle to Toronto
Explore direct flight options from Seattle to Toronto based on user searches, and compare prices and availability for your desired travel dates. Data last updated 27 October 2026.
Fri 11/128:33 a.m. -
Nonstop4h 32m
Fri 18/125:15 p.m. -
Nonstop5h 58m
Deal found 26/10C$ 661
Wed 24/28:21 a.m. -
Nonstop4h 44m
Sun 28/25:15 p.m. -
Nonstop5h 28m
Deal found 24/10C$ 671
Sat 20/28:21 a.m. -
Nonstop4h 44m
Sat 27/25:15 p.m. -
Nonstop5h 28m
Deal found 27/10C$ 676
Thu 25/28:21 a.m. -
Nonstop4h 44m
Mon 1/35:15 p.m. -
Nonstop5h 28m
Deal found 23/10C$ 685
Wed 25/118:31 a.m. -
Nonstop4h 34m
Mon 30/115:15 p.m. -
Nonstop5h 32m
Deal found 25/10C$ 690
Sun 13/128:33 a.m. -
Nonstop4h 32m
Wed 16/125:15 p.m. -
Nonstop5h 41m
Deal found 23/10C$ 798
Mon 7/128:33 a.m. -
Nonstop4h 32m
Mon 14/126:25 p.m. -
Nonstop5h 34m
Deal found 23/10C$ 800
Wed 27/18:29 a.m. -
Nonstop4h 36m
Sun 31/15:15 p.m. -
Nonstop5h 27m
Deal found 25/10C$ 849
Sat 14/118:19 a.m. -
Nonstop4h 46m
Sat 12/125:15 p.m. -
Nonstop5h 41m
Deal found 27/10C$ 853
Fri 15/18:29 a.m. -
Nonstop4h 36m
Tue 19/15:15 p.m. -
Nonstop5h 27m
Deal found 23/10C$ 863
Last-minute flights from Seattle to Toronto
Discover last-minute flight deals from Seattle to Toronto. Data last updated 27 October 2026 and is based on user searches.
Sun 1/112:30 p.m. -
1 stop17h 25m
Tue 3/117:30 a.m. -
1 stop9h 10m
Deal found 25/10C$ 1,003
Tue 3/112:30 p.m. -
2 stops12h 15m
Tue 17/1110:20 p.m. -
1 stop18h 20m
Deal found 23/10C$ 809
Thu 5/119:13 p.m. -
2 stops21h 30m
Sat 21/117:30 a.m. -
1 stop9h 10m
Deal found 24/10C$ 953
Fri 6/114:27 p.m. -
2 stops42h 13m
Tue 17/119:50 a.m. -
1 stop13h 04m
Deal found 24/10C$ 797
Fri 6/114:27 p.m. -
2 stops42h 13m
Tue 1/127:30 a.m. -
1 stop9h 10m
Deal found 27/10C$ 814
Fri 6/114:27 p.m. -
2 stops24h 12m
Sat 21/117:30 a.m. -
1 stop9h 10m
Deal found 24/10C$ 867
Fri 6/114:27 p.m. -
2 stops42h 13m
Wed 18/119:55 a.m. -
1 stop11h 38m
Deal found 24/10C$ 873
Fri 6/114:27 p.m. -
2 stops24h 12m
Thu 19/117:30 a.m. -
1 stop9h 10m
Deal found 24/10C$ 971
One-way flights from Seattle to Toronto
Search for one-way flight options from Seattle to Toronto. Find affordable one-way fares based on user searches. Data last updated 27 October 2026.
Mon 7/121:21 p.m. -
2 stops14h 31m
Wed 31/1212:00 a.m. -
Nonstop0h 00m
Deal found 23/10C$ 241
Mon 16/112:30 p.m. -
2 stops12h 15m
Wed 31/1212:00 a.m. -
Nonstop0h 00m
Deal found 23/10C$ 253
Mon 14/128:56 p.m. -
3 stops46h 59m
Wed 31/1212:00 a.m. -
Nonstop0h 00m
Deal found 24/10C$ 254
Mon 23/112:30 p.m. -
2 stops12h 15m
Wed 31/1212:00 a.m. -
Nonstop0h 00m
Deal found 23/10C$ 255
Sat 21/112:20 p.m. -
2 stops12h 25m
Wed 31/1212:00 a.m. -
Nonstop0h 00m
Deal found 23/10C$ 257
Fri 4/121:32 p.m. -
2 stops31h 15m
Wed 31/1212:00 a.m. -
Nonstop0h 00m
Deal found 25/10C$ 258
Mon 21/122:30 p.m. -
2 stops12h 15m
Wed 31/1212:00 a.m. -
Nonstop0h 00m
Deal found 23/10C$ 264
Tue 17/112:30 p.m. -
2 stops12h 15m
Wed 31/1212:00 a.m. -
Nonstop0h 00m
Deal found 24/10C$ 268
Sun 22/112:30 p.m. -
2 stops12h 15m
Wed 31/1212:00 a.m. -
Nonstop0h 00m
Deal found 24/10C$ 269
Find flight deals from Seattle to Toronto
Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Toronto (YTO). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 27 October 2026.
Customize your flight search to find flights from Seattle to Toronto that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 7,457,451 searches. Data last updated 27 October 2026.
Use the filters below to find and compare flights from Seattle to Toronto that are best for you.
Fly from
Fly to
Route
Depart
Return
Price
Cheapest round-trip
Quickest round-trip
SeattleToronto
SEA Seattle/Tacoma Intl - YYZ Toronto Pearson Intl
SEAYYZ
Seattle/Tacoma Intl
Sat 26/12
8:33 a.m.-4:05 p.m.
Nonstop4h 32m
Toronto Pearson Intl
Wed 31/12
12:00 a.m.-9:00 p.m.
Nonstop0h 00m
C$ 302
SeattleToronto
SEA Seattle/Tacoma Intl - YYZ Toronto Pearson Intl
SEAYYZ
Seattle/Tacoma Intl
Wed 6/1
8:29 a.m.-4:05 p.m.
Nonstop4h 36m
Toronto Pearson Intl
Wed 31/12
12:00 a.m.-9:00 p.m.
Nonstop0h 00m
C$ 302
SeattleToronto
SEA Seattle/Tacoma Intl - YYZ Toronto Pearson Intl
SEAYYZ
Seattle/Tacoma Intl
Tue 5/1
8:29 a.m.-4:05 p.m.
Nonstop4h 36m
Toronto Pearson Intl
Wed 31/12
12:00 a.m.-9:00 p.m.
Nonstop0h 00m
C$ 302
SeattleToronto
SEA Seattle/Tacoma Intl - YYZ Toronto Pearson Intl
SEAYYZ
Seattle/Tacoma Intl
Mon 14/12
8:33 a.m.-4:05 p.m.
Nonstop4h 32m
Toronto Pearson Intl
Wed 31/12
12:00 a.m.-9:00 p.m.
Nonstop0h 00m
C$ 317
SeattleToronto
SEA Seattle/Tacoma Intl - YYZ Toronto Pearson Intl
SEAYYZ
Seattle/Tacoma Intl
Fri 11/12
8:33 a.m.-4:05 p.m.
Nonstop4h 32m
Toronto Pearson Intl
Wed 31/12
12:00 a.m.-9:00 p.m.
Nonstop0h 00m
C$ 317
SeattleToronto
SEA Seattle/Tacoma Intl - YYZ Toronto Pearson Intl
SEAYYZ
Seattle/Tacoma Intl
Mon 28/12
8:33 a.m.-4:05 p.m.
Nonstop4h 32m
Toronto Pearson Intl
Wed 31/12
12:00 a.m.-9:00 p.m.
Nonstop0h 00m
C$ 317
SeattleToronto
SEA Seattle/Tacoma Intl - YYZ Toronto Pearson Intl
SEAYYZ
Seattle/Tacoma Intl
Fri 27/11
8:31 a.m.-4:05 p.m.
Nonstop4h 34m
Toronto Pearson Intl
Wed 31/12
12:00 a.m.-9:00 p.m.
Nonstop0h 00m
C$ 317
SeattleToronto
SEA Seattle/Tacoma Intl - YYZ Toronto Pearson Intl
SEAYYZ
Seattle/Tacoma Intl
Mon 23/11
8:31 a.m.-4:05 p.m.
Nonstop4h 34m
Toronto Pearson Intl
Wed 31/12
12:00 a.m.-9:00 p.m.
Nonstop0h 00m
C$ 317
SeattleToronto
SEA Seattle/Tacoma Intl - YYZ Toronto Pearson Intl
SEAYYZ
Seattle/Tacoma Intl
Fri 4/12
8:33 a.m.-4:05 p.m.
Nonstop4h 32m
Toronto Pearson Intl
Wed 31/12
12:00 a.m.-9:00 p.m.
Nonstop0h 00m
C$ 317
SeattleToronto
SEA Seattle/Tacoma Intl - YYZ Toronto Pearson Intl
SEAYYZ
Seattle/Tacoma Intl
Sun 10/1
6:00 a.m.-4:19 p.m.
1 stop7h 19m
Toronto Pearson Intl
Wed 31/12
12:00 a.m.-9:00 p.m.
Nonstop0h 00m
C$ 330
Flights are sorted by cheapest round-trip flights first.
Deals found on 25/10
Showing 1-10 of 21 resultsSorted by cheapest first
1
2
3
Best time to book a flight from Seattle to Toronto
Have a flexible travel schedule? Discover the best time to fly to Toronto from Seattle with our price prediction graph.
SEA-YTO
SEA-YYZ
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from Seattle to Toronto
SEA-YTO
SEA-YYZ
What is the cheapest month to book a flight from Seattle to Toronto?
Currently, January is the cheapest month in which you can book a flight from Seattle to Toronto (average of C$ 359). Flying from Seattle to Toronto in December is currently the most expensive (average of C$ 894). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
What is the cheapest time of day to fly from SEA to YTO?
Find hourly flight availability from Seattle to Toronto. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 27 October 2026.
Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Seattle to Toronto as you normally would.
How much does it cost to fly round-trip from Seattle to Toronto?
Airfare is typical for this route at the moment.
Seattle to Toronto flights typically cost between C$ 366 and C$ 689 in December.The cheapest round-trip price found within the last 5 days was C$ 530 on WestJet (7 Dec-14 Dec).
What’s the top layover airport for flights from Seattle to Toronto?
Share of one-stop round-trip flights from Seattle to Toronto chosen by Cheapflights users in the past 12 months, using the same layover each way.
Calgary (YYC) – chosen by Cheapflights users on 75% of one-stop itineraries from Seattle to Toronto on Cheapflights.
What’s the cheapest layover airport for flights from Seattle to Toronto?
Average round-trip fare for 1-stop flights from Seattle to Toronto, chosen by Cheapflights users in the past 12 months, with the same layover each way.
Calgary (YYC) is the most affordable 1-stop option, with an average round-trip price of C$ 382.
What’s the fastest layover option from Seattle to Toronto?
Shortest average travel time for 1-stop one-way flights from Seattle to Toronto, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by layover airport.
Flights via Calgary (YYC) have the shortest average one-way travel time for 1-stop routes: 7h 10m.
Which airport typically offers the quickest layover for flights from Seattle to Toronto?
Average layover duration for 1-stop one-way flights from Seattle to Toronto, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.
Flights via Calgary (YYC) offer the fastest connection on this route, with an average layover time of 1h 43m.
How far ahead should I book a flight from Seattle to Toronto?
Booking 64 days in advance of your planned departure date is, on average, the best time to get cheap flights from Seattle to Toronto. The general trend is that the closer you book to the departure date, the more expensive your flight will be.
Reviews of airlines servicing Toronto
Get insights into the airlines that provide service to Toronto. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Toronto. Reviews last updated 27 October 2026.
See what other customers who have flown with Alaska Airlines,WestJet, andAir Canada from Seattle to Toronto have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska has a brilliant crew. And the seats are good. As much as i loved my trip from Heathrow to Seattle, i definitely did not feel the same on the return flight. A lot was due to feeling very cramped and unfortunately for me, i had a kicker behind me and a passenger who did not stop moving (but constantly) next to me. The good was not good and i noticed that most people around me left most of their meal. The ice cream was very nice. I did not have breakfast. However the food was very nice on the way to Seattle
Alaska has a brilliant crew. And the seats are good. As much as i loved my trip from Heathrow to Seattle, i definitely did not feel the same on the return flight. A lot was due to feeling very cramped and unfortunately for me, i had a kicker behind me and a passenger who did not stop moving (but constantly) next to me. The good was not good and i noticed that most people around me left most of their meal. The ice cream was very nice. I did not have breakfast. However the food was very nice on the way to Seattle
Alaska has a brilliant crew. And the seats are good. As much as i loved my trip from Heathrow to Seattle, i definitely did not feel the same on the return flight. A lot was due to feeling very cramped and unfortunately for me, i had a kicker behind me and a passenger who did not stop moving (but constantly) next to me. The good was not good and i noticed that most people around me left most of their meal. The ice cream was very nice. I did not have breakfast. However the food was very nice on the way to Seattle
Alaska has a brilliant crew. And the seats are good. As much as i loved my trip from Heathrow to Seattle, i definitely did not feel the same on the return flight. A lot was due to feeling very cramped and unfortunately for me, i had a kicker behind me and a passenger who did not stop moving (but constantly) next to me. The good was not good and i noticed that most people around me left most of their meal. The ice cream was very nice. I did not have breakfast. However the food was very nice on the way to Seattle
Related info for your journey
Find useful and relevant information for your journey from Seattle to Toronto. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
What airport do you fly from for flights from Seattle to Toronto?
Seattle/Tacoma Intl (SEA), located 18.4 km from the city centre, is the airport you fly out of when you book flights from Seattle to Toronto. 3 airlines have flights from Seattle/Tacoma Intl to Toronto on a regular basis. Booking flights from Seattle/Tacoma Intl to Toronto should not be difficult; the airport handles an average of 3 outbound flights to Toronto per day.
How long is the flight from Seattle to Toronto?
For as low as C$ 676, Alaska Airlines can have you in Toronto from Seattle in 4h 32m. Airlines will cover a distance of 3306 km. Both multi-stop and direct flights can be found to your destination and back.
What are the cheapest airlines flying from Seattle to Toronto round-trip?
According to our current data, Alaska Airlines (C$ 317), WestJet (C$ 356), and Air Canada (C$ 370) offers the cheapest pricing from Seattle to Toronto. You may be able to fly from Seattle to Toronto for 49% less than the average price by searching for these airlines.
What are the cheapest airlines to fly from Seattle to Toronto one-way?
For one-way options, check prices for Alaska Airlines. According to our data, you can fly for as low as C$ 130. Users have also found prices from C$ 140 and C$ 150 on Air Canada and WestJet, respectively.
What are the most popular routes from Seattle to Toronto?
Most travellers choose Seattle/Tacoma Intl - Toronto Pearson Intl, Seattle/Tacoma Intl - Toronto Island or Seattle/Tacoma Intl - Hamilton when deciding on the best route from Seattle to Toronto.
What are the most reliable airlines from Seattle to Toronto?
Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Seattle to Toronto on time: Qatar Airways (100%), Alaska Airlines (100%), Air Canada (92%).
What are the cheapest flights from Seattle to Toronto?
On average you can expect to pay C$ 567 for a flight from Seattle to Toronto. The cheapest flight overall is C$ 294 while the most popular route, (Seattle/Tacoma Intl - Toronto Pearson Intl) is currently priced at C$ 598.
Can I find deals for business class flights from Seattle to Toronto?
Yes. Cheapflights offers flight deals from Seattle to Toronto by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
What is the cheapest month to book a flight from Seattle to Toronto?
Currently, January is the cheapest month in which you can book a flight from Seattle to Toronto (average of C$ 359). Flying from Seattle to Toronto in December is currently the most expensive (average of C$ 894). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
Explore flights to Toronto departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on 27 October 2026.
Discover the top 3 airlines that operate flights from Seattle to Toronto. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 7,457,451 searches. Data last updated 27 October 2026.
Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.
How does Cheapflights help users find flights from Seattle to Toronto?
Deals for Seattle to Toronto flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.
Why should you use Cheapflights to find cheap flight tickets from Seattle to Toronto?
Millions of users choose and trust Cheapflights to book the best flight deals from Seattle to Toronto for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.
Can Cheapflights find flights from Seattle to Toronto with no change fees?
Need flexible booking options for your flight to Toronto from Seattle? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.
Can Cheapflights notify me if prices for flights from Seattle to Toronto become cheaper?
Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Toronto from Seattle today and book when prices fit your budget.
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