$164+ Cheap flights from Seattle (SEA) to Toronto (YTO)
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 10/1. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — YTO
Oct 12 — Oct 191
Round-trip
1 adult, Economy
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Find cheap flights from Seattle to Toronto with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheapflights Tip: The best prices from Seattle/Tacoma Intl to Toronto are usually found in January or November, booked 79 days in advance, depart on a Tuesday or Wednesday and return on a Friday
Cheap flight deals from Seattle to Toronto
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Cheapest flights from Seattle to TorontoExplore 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 September 12, 2026.
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 September 12, 2026.
This Kiwi.com deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/2510:30 am -
2 stops15h 40m
Sat 10/1712:00 pm -
1 stop9h 45m
Deal found 9/11![WestJet logo]()
$349
This Kiwi.com deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/287:35 pm -
1 stop8h 20m
Fri 10/28:35 pm -
1 stop16h 07m
Deal found 9/10![Multiple Airlines logo]()
$350
This FlightHub deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/1910:30 am -
2 stops15h 40m
Thu 10/2212:40 pm -
2 stops9h 05m
Deal found 9/10![WestJet logo]()
$351
This FlightHub deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/810:30 am -
1 stop9h 15m
Sun 10/1110:20 pm -
2 stops14h 20m
Deal found 9/10![WestJet logo]()
$352
This Kiwi.com deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/27:35 pm -
1 stop7h 10m
Tue 10/1310:00 am -
1 stop11h 45m
Deal found 9/11![WestJet logo]()
$353
This Kiwi.com deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/3010:30 am -
1 stop9h 15m
Sun 10/1110:25 pm -
1 stop14h 15m
Deal found 9/11![WestJet logo]()
$354
This Justfly.com deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/287:35 pm -
1 stop8h 20m
Fri 10/22:50 pm -
1 stop21h 50m
Deal found 9/11![WestJet logo]()
$356
This Kiwi.com deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/187:35 pm -
2 stops9h 24m
Sat 10/241:30 pm -
1 stop8h 15m
Deal found 9/11![WestJet logo]()
$357
This FlightHub deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/1110:30 am -
2 stops8h 05m
Fri 10/163:30 pm -
2 stops21h 10m
Deal found 9/11![WestJet logo]()
$358
This Justfly.com deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/1010:30 am -
1 stop9h 15m
Thu 10/1512:00 pm -
1 stop9h 45m
Deal found 9/9![WestJet logo]()
$360
This Justfly.com deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/310:30 am -
1 stop9h 15m
Sun 10/1110:20 pm -
2 stops14h 20m
Deal found 9/11![WestJet logo]()
$361
This FlightHub deal was found by Cheapflights users on 9/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/107:35 pm -
1 stop21h 15m
Sun 10/188:40 pm -
1 stop16h 00m
Deal found 9/12![WestJet logo]()
$376
Best flights from Seattle to TorontoDiscover 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 September 12, 2026.
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 September 12, 2026.
This FlightHub deal was found by Cheapflights users on 9/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/107:35 pm -
1 stop21h 15m
Sun 10/188:40 pm -
1 stop16h 00m
Deal found 9/12![WestJet logo]()
$376
This Mytrip deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/167:35 pm -
1 stop16h 25m
Thu 10/226:05 am -
1 stop15h 40m
Deal found 9/11![Multiple Airlines logo]()
$481
This Alaska Airlines deal was found by Cheapflights users on 9/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/228:00 am -
Nonstop4h 45m
Sat 10/244:55 pm -
Nonstop5h 31m
Deal found 9/7![Alaska Airlines logo]()
$525
This Delta deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/176:00 am -
1 stop8h 19m
Sat 10/247:45 am -
1 stop11h 31m
Deal found 9/11![Delta logo]()
$537
This Air Canada deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/27:15 pm -
2 stops12h 40m
Sat 10/103:35 pm -
2 stops10h 12m
Deal found 9/11![Air Canada logo]()
$561
This United Airlines deal was found by Cheapflights users on 9/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/272:30 pm -
1 stop23h 12m
Thu 10/2912:05 pm -
1 stop27h 14m
Deal found 9/7![United Airlines logo]()
$662
This Booking.com deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/257:35 pm -
1 stop21h 15m
Sun 9/278:40 pm -
1 stop16h 00m
Deal found 9/11![WestJet logo]()
$414
This Trip.com deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/87:35 pm -
1 stop18h 40m
Tue 10/136:10 pm -
1 stop18h 30m
Deal found 9/8![WestJet logo]()
$417
This Mytrip deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/1010:30 am -
1 stop9h 43m
Sat 10/176:55 pm -
1 stop17h 45m
Deal found 9/11![Multiple Airlines logo]()
$487
This WestJet deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure WestJet is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/27:35 pm -
1 stop21h 15m
Sun 10/118:40 pm -
1 stop16h 00m
Deal found 9/11![WestJet logo]()
$433
This Alaska Airlines deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/138:19 am -
Nonstop4h 46m
Mon 11/165:15 pm -
Nonstop5h 30m
Deal found 9/8![Alaska Airlines logo]()
$547
This Mytrip deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/177:15 pm -
2 stops21h 00m
Sat 10/242:05 pm -
2 stops22h 22m
Deal found 9/9![Multiple Airlines logo]()
$521
This Mytrip deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/2210:30 am -
1 stop9h 43m
Thu 10/296:05 am -
2 stops11h 35m
Deal found 9/11![Multiple Airlines logo]()
$527
This oojo deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/2310:30 am -
1 stop27h 45m
Fri 9/256:10 pm -
1 stop18h 30m
Deal found 9/9![WestJet logo]()
$481
This Alaska Airlines deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/27:52 am -
Nonstop4h 53m
Tue 10/64:55 pm -
Nonstop5h 31m
Deal found 9/9![Alaska Airlines logo]()
$585
This United Airlines deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/257:00 am -
1 stop6h 47m
Mon 12/286:45 am -
1 stop8h 41m
Deal found 9/9![United Airlines logo]()
$670
This Mytrip deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/1710:30 am -
1 stop9h 43m
Sat 10/247:25 am -
1 stop14h 07m
Deal found 9/9![Multiple Airlines logo]()
$529
This oojo deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/810:30 am -
1 stop27h 45m
Sun 10/116:10 pm -
1 stop18h 30m
Deal found 9/9![WestJet logo]()
$503
This United Airlines deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/1710:42 am -
1 stop10h 17m
Tue 10/65:16 pm -
1 stop9h 10m
Deal found 9/8![United Airlines logo]()
$681
This Alaska Airlines deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/237:52 am -
Nonstop4h 53m
Tue 9/294:55 pm -
Nonstop5h 18m
Deal found 9/9![Alaska Airlines logo]()
$642
This Mytrip deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/87:35 pm -
3 stops23h 50m
Tue 10/136:05 am -
3 stops15h 40m
Deal found 9/10![Multiple Airlines logo]()
$538
This United Airlines deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/177:00 am -
1 stop7h 56m
Sun 9/276:10 am -
1 stop11h 43m
Deal found 9/8![United Airlines logo]()
$681
This WestJet deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure WestJet is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/37:35 pm -
1 stop21h 15m
Mon 10/58:40 pm -
1 stop25h 05m
Deal found 9/8![WestJet logo]()
$512
This Alaska Airlines deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/48:00 am -
Nonstop4h 45m
Sat 10/104:55 pm -
Nonstop5h 31m
Deal found 9/11![Alaska Airlines logo]()
$656
This Gotogate deal was found by Cheapflights users on 9/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/227:35 pm -
1 stop18h 40m
Thu 10/294:25 pm -
1 stop25h 15m
Deal found 9/7![WestJet logo]()
$519
This Kiwi.com deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/2611:41 pm -
1 stop12h 25m
Mon 11/210:35 am -
1 stop13h 54m
Deal found 9/10![Multiple Airlines logo]()
$578
This Alaska Airlines deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/27:52 am -
Nonstop4h 53m
Sat 10/104:55 pm -
Nonstop5h 31m
Deal found 9/11![Alaska Airlines logo]()
$656
This Mytrip deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/207:35 pm -
3 stops23h 50m
Sat 10/247:25 am -
2 stops14h 20m
Deal found 9/8![Multiple Airlines logo]()
$595
This Alaska Airlines deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/27:52 am -
Nonstop4h 53m
Fri 10/94:55 pm -
Nonstop5h 31m
Deal found 9/11![Alaska Airlines logo]()
$656
This FlightHub deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/47:35 pm -
1 stop21h 15m
Sun 10/118:40 pm -
1 stop16h 00m
Deal found 9/8![WestJet logo]()
$584
Last-minute flights from Seattle to TorontoDiscover last-minute flight deals from Seattle to Toronto. Data last updated September 12, 2026 and is based on user searches.
Discover last-minute flight deals from Seattle to Toronto. Data last updated September 12, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/2510:30 am -
2 stops15h 40m
Sat 10/1712:00 pm -
1 stop9h 45m
Deal found 9/11![WestJet logo]()
$349
This Kiwi.com deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/287:35 pm -
1 stop8h 20m
Fri 10/28:35 pm -
1 stop16h 07m
Deal found 9/10![Multiple Airlines logo]()
$350
This Justfly.com deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/287:35 pm -
1 stop8h 20m
Fri 10/22:50 pm -
1 stop21h 50m
Deal found 9/11![WestJet logo]()
$356
This Kiwi.com deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/3010:30 am -
1 stop9h 15m
Sun 10/1110:25 pm -
1 stop14h 15m
Deal found 9/11![WestJet logo]()
$354
This Kiwi.com deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/27:35 pm -
1 stop7h 10m
Tue 10/1310:00 am -
1 stop11h 45m
Deal found 9/11![WestJet logo]()
$353
This Justfly.com deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/310:30 am -
1 stop9h 15m
Sun 10/1110:20 pm -
2 stops14h 20m
Deal found 9/11![WestJet logo]()
$361
This FlightHub deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/810:30 am -
1 stop9h 15m
Sun 10/1110:20 pm -
2 stops14h 20m
Deal found 9/10![WestJet logo]()
$352
This Justfly.com deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/1010:30 am -
1 stop9h 15m
Thu 10/1512:00 pm -
1 stop9h 45m
Deal found 9/9![WestJet logo]()
$360
This FlightHub deal was found by Cheapflights users on 9/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/107:35 pm -
1 stop21h 15m
Sun 10/188:40 pm -
1 stop16h 00m
Deal found 9/12![WestJet logo]()
$376
This FlightHub deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/1110:30 am -
2 stops8h 05m
Fri 10/163:30 pm -
2 stops21h 10m
Deal found 9/11![WestJet logo]()
$358
This Kiwi.com deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/187:35 pm -
2 stops9h 24m
Sat 10/241:30 pm -
1 stop8h 15m
Deal found 9/11![WestJet logo]()
$357
This FlightHub deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/1910:30 am -
2 stops15h 40m
Thu 10/2212:40 pm -
2 stops9h 05m
Deal found 9/10![WestJet logo]()
$351
One-way flights from Seattle to TorontoSearch for one-way flight options from Seattle to Toronto. Find affordable one-way fares based on user searches. Data last updated September 12, 2026.
Search for one-way flight options from Seattle to Toronto. Find affordable one-way fares based on user searches. Data last updated September 12, 2026.
This FlightHub deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/110:30 am -
2 stops21h 45m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/10![WestJet logo]()
$164
This Trip.com deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/303:30 pm -
2 stops14h 05m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/10![WestJet logo]()
$165
This Kiwi.com deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/64:27 pm -
2 stops46h 48m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/11![Multiple Airlines logo]()
$165
This Jetabroad deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Jetabroad is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/810:30 am -
2 stops21h 45m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/10![WestJet logo]()
$166
This FlightHub deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/107:35 pm -
1 stop21h 15m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/11![WestJet logo]()
$166
This Kiwi.com deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/299:13 pm -
2 stops30h 32m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/11![Multiple Airlines logo]()
$167
This Kiwi.com deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/229:16 pm -
2 stops20h 59m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/11![Multiple Airlines logo]()
$170
This Kiwi.com deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/48:55 pm -
1 stop30h 55m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/9![Multiple Airlines logo]()
$171
This Justfly.com deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/227:35 pm -
2 stops23h 00m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/8![WestJet logo]()
$172
This Kissandfly.com deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kissandfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/1710:30 am -
2 stops21h 45m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/9![WestJet logo]()
$174
This FlightHub deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/1810:30 am -
2 stops18h 29m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/8![WestJet logo]()
$176
This Kissandfly.com deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kissandfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/187:35 pm -
1 stop21h 15m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/9![WestJet logo]()
$179
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 September 12, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $349 (Kiwi.com) |
One-way from | $164 (FlightHub) |
Popular in | July |
Cheapest in | January |
Average price | $580 |
Good round-trip deal | $557 or less |
Good one-way deal | $309 or less |
Cheapflights Fare Finder
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 September 12, 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
Cheapest round-trip
SeattleToronto
SEA Seattle/Tacoma Intl - YKF Toronto Region of Waterloo Intl
SEAYKF
Seattle/Tacoma Intl
Sat 10/10
7:35 pm-7:50 pm
1 stop21h 15m
Toronto Region of Waterloo Intl
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$166
SeattleToronto
SEA Seattle/Tacoma Intl - YKF Toronto Region of Waterloo Intl
SEAYKF
Seattle/Tacoma Intl
Sat 10/17
7:35 pm-7:50 pm
1 stop21h 15m
Toronto Region of Waterloo Intl
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$180
SeattleToronto
SEA Seattle/Tacoma Intl - YKF Toronto Region of Waterloo Intl
SEAYKF
Seattle/Tacoma Intl
Fri 9/25
7:35 pm-7:50 pm
1 stop21h 15m
Toronto Region of Waterloo Intl
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$182
SeattleHamilton
SEA Seattle/Tacoma Intl - YHM Hamilton
SEAYHM
Seattle/Tacoma Intl
Sat 9/26
7:35 pm-5:15 pm
1 stop18h 40m
Hamilton
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$183
SeattleHamilton
SEA Seattle/Tacoma Intl - YHM Hamilton
SEAYHM
Seattle/Tacoma Intl
Sat 10/24
7:35 pm-3:25 pm
1 stop16h 50m
Hamilton
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$184
SeattleHamilton
SEA Seattle/Tacoma Intl - YHM Hamilton
SEAYHM
Seattle/Tacoma Intl
Sat 10/3
7:35 pm-5:15 pm
1 stop18h 40m
Hamilton
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$185
SeattleToronto
SEA Seattle/Tacoma Intl - YKF Toronto Region of Waterloo Intl
SEAYKF
Seattle/Tacoma Intl
Thu 10/15
7:35 pm-7:50 pm
1 stop21h 15m
Toronto Region of Waterloo Intl
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$186
SeattleHamilton
SEA Seattle/Tacoma Intl - YHM Hamilton
SEAYHM
Seattle/Tacoma Intl
Sat 10/10
7:35 pm-5:15 pm
1 stop18h 40m
Hamilton
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$187
SeattleHamilton
SEA Seattle/Tacoma Intl - YHM Hamilton
SEAYHM
Seattle/Tacoma Intl
Sun 10/11
7:35 pm-5:15 pm
1 stop18h 40m
Hamilton
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$187
SeattleToronto
SEA Seattle/Tacoma Intl - YKF Toronto Region of Waterloo Intl
SEAYKF
Seattle/Tacoma Intl
Thu 10/1
7:35 pm-7:50 pm
1 stop21h 15m
Toronto Region of Waterloo Intl
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$187
Showing 1-10 of 60 resultsSorted by cheapest first
Compare providers for flights from Seattle to Toronto
Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Seattle to Toronto in September.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy1 star | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on Seattle-Toronto flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Seattle-Toronto flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Seattle-Toronto flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Seattle-Toronto flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Seattle-Toronto flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.
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-YKF
SEA-YYZ
SEA-YTZ
SEA-YHM
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-YKF
SEA-YYZ
SEA-YTZ
SEA-YHM
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 $255). Flying from Seattle to Toronto in July is currently the most expensive (average of $600). 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 September 12, 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.
Weekly flight availability from Seattle to Toronto
Explore weekly flight availability from Seattle to Toronto. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated September 12, 2026.
The most flights from SEA to YTO are scheduled on a Wednesday (5 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (1 on average).
How much does it cost to fly round-trip from Seattle to Toronto?
Airfare is below average for this route at the moment.
Seattle to Toronto flights typically cost between $398 and $701 in September.The cheapest round-trip price found within the last 5 days was $349 on WestJet (Sep 25-Oct 17).
How far ahead should I book a flight from Seattle to Toronto?
Booking 59 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.
The best insider tips for Seattle to Toronto flights
AI-powered summary based on content written by travel experts. AI can make mistakes.
Cheapflights partnered with top experts to bring you the best recommendations for your Seattle to Toronto trip
Our travel experts
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 September 12, 2026.
Get a feel of what it's like to fly with Alaska Airlines,Delta, andUnited Airlines from Seattle to Toronto by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Entertainment
7.0
Food
7.0
Overall
7.9
Crew
8.5
Boarding
8.1
Comfort
7.8
Reviews
1 / 20
6.0
GoodAnonymous,Jul 2026
SEA - LHR
Entertainment
7.0
Food
7.0
Overall
7.9
Crew
8.5
Boarding
8.1
Comfort
7.8
Reviews
1 / 20
6.0
GoodAnonymous,Jul 2026
SEA - LHR
Entertainment
7.0
Food
7.0
Overall
7.9
Crew
8.5
Boarding
8.1
Comfort
7.8
Reviews
1 / 20
6.0
GoodAnonymous,Jul 2026
SEA - LHR
Entertainment
7.0
Food
7.0
Overall
7.9
Crew
8.5
Boarding
8.1
Comfort
7.8
Reviews
1 / 20
6.0
GoodAnonymous,Jul 2026
SEA - LHR
Entertainment
7.0
Food
7.0
Overall
7.9
Crew
8.5
Boarding
8.1
Comfort
7.8
Reviews
1 / 20
6.0
GoodAnonymous,Jul 2026
SEA - LHR
Entertainment
7.0
Food
7.0
Overall
7.9
Crew
8.5
Boarding
8.1
Comfort
7.8
Reviews
1 / 20
6.0
GoodAnonymous,Jul 2026
SEA - LHR
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.
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Complete your trip
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Search flights from Seattle to Toronto by cabin class
Find flights from Seattle to Toronto, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Seattle and Toronto flights
Browse other Seattle and Toronto flight options. Last updated on September 12, 2026.
Other flights from Seattle
Browse through other flights departing from Seattle. Flights are based on user searches made on Cheapflights and were last updated on September 12, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Other flights to Toronto
Explore flights to Toronto departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on September 12, 2026.
Top 5 airlines flying from Seattle to Toronto
Discover the top 5 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 September 12, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$132 | Average$393 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$132 | Average$445 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$228 | Average$362 | FlexibilityNo cancel fee | On-time60% | |
| Cheapest$250 | Average$481 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$277 | Average$519 | FlexibilityNo cancel fee | On-time69% |