$172+ 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 12/7. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — YTO
Nov 26 — Dec 31
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 87 days in advance, depart on a Tuesday or Wednesday and return on a Thursday
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 October 27, 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 October 27, 2026.
This Kiwi.com deal was found by Cheapflights users on 10/22. 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.
Tue 12/152:30 pm -
2 stops12h 15m
Fri 12/186:10 am -
1 stop10h 30m
Deal found 10/22![WestJet logo]()
$362
This Kiwi.com deal was found by Cheapflights users on 10/22. 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 11/162:30 pm -
2 stops12h 15m
Thu 1/76:10 am -
1 stop10h 30m
Deal found 10/22![WestJet logo]()
$363
This Trip.com deal was found by Cheapflights users on 10/23. 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.
Mon 12/72:30 pm -
2 stops12h 15m
Mon 12/146:10 am -
1 stop10h 30m
Deal found 10/23![WestJet logo]()
$378
This Kiwi.com deal was found by Cheapflights users on 10/24. 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.
Sat 11/212:20 pm -
2 stops12h 25m
Tue 12/17:30 am -
1 stop9h 10m
Deal found 10/24![WestJet logo]()
$389
This Kiwi.com deal was found by Cheapflights users on 10/26. 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.
Tue 11/242:30 pm -
2 stops12h 15m
Tue 12/17:30 am -
1 stop9h 10m
Deal found 10/26![WestJet logo]()
$393
This Kiwi.com deal was found by Cheapflights users on 10/24. 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.
Sat 12/52:20 pm -
2 stops12h 25m
Sun 12/137:30 am -
1 stop9h 10m
Deal found 10/24![WestJet logo]()
$400
This Justfly.com deal was found by Cheapflights users on 10/24. 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.
Tue 11/172:30 pm -
2 stops12h 15m
Tue 11/247:30 am -
1 stop9h 10m
Deal found 10/24![WestJet logo]()
$401
This Kiwi.com deal was found by Cheapflights users on 10/24. 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 12/62:30 pm -
2 stops12h 15m
Thu 1/287:30 am -
1 stop9h 10m
Deal found 10/24![WestJet logo]()
$406
This Justfly.com deal was found by Cheapflights users on 10/25. 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.
Wed 11/252:30 pm -
2 stops12h 15m
Tue 12/17:30 am -
1 stop9h 10m
Deal found 10/25![WestJet logo]()
$409
This Kiwi.com deal was found by Cheapflights users on 10/22. 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 11/114:27 pm -
2 stops19h 33m
Wed 11/1810:30 am -
1 stop11h 18m
Deal found 10/22![Multiple Airlines logo]()
$483
This Kiwi.com deal was found by Cheapflights users on 10/25. 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 12/310:40 pm -
1 stop9h 39m
Sun 12/64:35 pm -
2 stops26h 08m
Deal found 10/25![Multiple Airlines logo]()
$521
This Kiwi.com deal was found by Cheapflights users on 10/26. 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 12/109:09 pm -
2 stops38h 51m
Thu 12/174:35 pm -
1 stop10h 18m
Deal found 10/26![Multiple Airlines logo]()
$523
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 October 27, 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 October 27, 2026.
This Alaska Airlines deal was found by Cheapflights users on 10/22. 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.
Sat 11/288:31 am -
Nonstop4h 34m
Sat 12/55:15 pm -
Nonstop5h 41m
Deal found 10/22![Alaska Airlines logo]()
$482
This Delta deal was found by Cheapflights users on 10/23. 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 2/2012:00 pm -
1 stop8h 04m
Sat 2/275:15 pm -
1 stop7h 50m
Deal found 10/23![Delta logo]()
$528
This Kiwi.com deal was found by Cheapflights users on 10/26. 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 11/264:37 pm -
2 stops25h 28m
Tue 12/110:30 am -
1 stop10h 41m
Deal found 10/26![Multiple Airlines logo]()
$560
This FlightHub deal was found by Cheapflights users on 10/25. 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.
Wed 11/252:30 pm -
1 stop20h 55m
Tue 12/13:25 pm -
1 stop25h 15m
Deal found 10/25![WestJet logo]()
$634
This United Airlines deal was found by Cheapflights users on 10/22. 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.
Sun 12/65:28 pm -
2 stops37h 39m
Sun 12/137:40 pm -
2 stops25h 48m
Deal found 10/22![United Airlines logo]()
$733
This Alaska Airlines deal was found by Cheapflights users on 10/25. 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 12/98:33 am -
Nonstop4h 32m
Wed 12/165:15 pm -
Nonstop5h 41m
Deal found 10/25![Alaska Airlines logo]()
$482
This Alaska Airlines deal was found by Cheapflights users on 10/26. 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 12/118:33 am -
Nonstop4h 32m
Fri 12/185:15 pm -
Nonstop5h 58m
Deal found 10/26![Alaska Airlines logo]()
$503
This Kiwi.com deal was found by Cheapflights users on 10/25. 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 12/93:44 pm -
1 stop14h 55m
Wed 12/164:35 pm -
1 stop19h 25m
Deal found 10/25![Multiple Airlines logo]()
$564
This Delta deal was found by Cheapflights users on 10/22. 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.
Sun 11/298:58 pm -
2 stops8h 57m
Sat 12/57:35 am -
1 stop10h 03m
Deal found 10/22![Delta logo]()
$647
This Kiwi.com deal was found by Cheapflights users on 10/22. 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 12/610:40 pm -
1 stop9h 39m
Sun 12/134:35 pm -
1 stop19h 22m
Deal found 10/22![Multiple Airlines logo]()
$590
This oojo deal was found by Cheapflights users on 10/23. 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.
Mon 11/162:30 pm -
1 stop20h 55m
Thu 11/193:25 pm -
1 stop25h 15m
Deal found 10/23![WestJet logo]()
$670
This KAYAK deal was found by Cheapflights users on 10/26. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/1311:35 am -
1 stop9h 06m
Wed 12/165:15 pm -
Nonstop5h 41m
Deal found 10/26![Alaska Airlines logo]()
$589
This Delta deal was found by Cheapflights users on 10/24. 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 1/99:05 am -
2 stops11h 51m
Sat 1/236:30 am -
2 stops12h 32m
Deal found 10/24![Delta logo]()
$654
This United Airlines deal was found by Cheapflights users on 10/23. 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.
Mon 11/167:35 pm -
2 stops18h 07m
Thu 11/1912:05 pm -
2 stops24h 35m
Deal found 10/23![United Airlines logo]()
$754
This Kiwi.com deal was found by Cheapflights users on 10/23. 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.
Tue 11/1011:42 pm -
1 stop12h 18m
Thu 11/1210:30 am -
1 stop13h 59m
Deal found 10/23![Multiple Airlines logo]()
$651
This Alaska Airlines deal was found by Cheapflights users on 10/24. 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.
Sat 12/511:40 pm -
1 stop8h 16m
Fri 12/115:15 pm -
Nonstop5h 41m
Deal found 10/24![Alaska Airlines logo]()
$599
This Kiwi.com deal was found by Cheapflights users on 10/24. 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 11/299:45 pm -
1 stop12h 05m
Sat 12/1212:10 pm -
1 stop12h 49m
Deal found 10/24![Multiple Airlines logo]()
$702
This Mytrip deal was found by Cheapflights users on 10/26. 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 12/1110:10 am -
1 stop10h 55m
Fri 12/187:05 am -
1 stop17h 52m
Deal found 10/26![Multiple Airlines logo]()
$728
This Alaska Airlines deal was found by Cheapflights users on 10/22. 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.
Sat 11/1411:23 am -
1 stop9h 23m
Sat 12/125:15 pm -
Nonstop5h 41m
Deal found 10/22![Alaska Airlines logo]()
$730
This Kiwi.com deal was found by Cheapflights users on 10/26. 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 11/268:40 am -
1 stop10h 04m
Wed 12/22:20 pm -
2 stops22h 12m
Deal found 10/26![Multiple Airlines logo]()
$732
This Kiwi.com deal was found by Cheapflights users on 10/24. 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 12/1711:39 pm -
1 stop12h 21m
Sun 12/204:35 pm -
1 stop19h 25m
Deal found 10/24![Multiple Airlines logo]()
$737
This Gotogate deal was found by Cheapflights users on 10/24. 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.
Sun 11/295:48 pm -
1 stop20h 38m
Sat 12/57:05 am -
1 stop8h 56m
Deal found 10/24![Multiple Airlines logo]()
$756
This Mytrip deal was found by Cheapflights users on 10/25. 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 11/288:40 am -
1 stop8h 13m
Sat 12/57:05 am -
1 stop14h 17m
Deal found 10/25![Multiple Airlines logo]()
$783
This Booking.com deal was found by Cheapflights users on 10/25. 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 12/2511:29 am -
1 stop9h 36m
Thu 12/317:05 am -
1 stop8h 54m
Deal found 10/25![Multiple Airlines logo]()
$806
This Mytrip deal was found by Cheapflights users on 10/22. 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.
Sun 12/610:10 am -
1 stop10h 55m
Sun 12/136:05 am -
2 stops15h 17m
Deal found 10/22![Multiple Airlines logo]()
$811
This Mytrip deal was found by Cheapflights users on 10/23. 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.
Sun 11/221:52 pm -
3 stops22h 53m
Sat 11/287:00 pm -
2 stops16h 45m
Deal found 10/23![Multiple Airlines logo]()
$1,260
Last-minute flights from Seattle to TorontoDiscover last-minute flight deals from Seattle to Toronto. Data last updated October 27, 2026 and is based on user searches.
Discover last-minute flight deals from Seattle to Toronto. Data last updated October 27, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 10/22. 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 11/114:27 pm -
2 stops19h 33m
Wed 11/1810:30 am -
1 stop11h 18m
Deal found 10/22![Multiple Airlines logo]()
$483
This Kiwi.com deal was found by Cheapflights users on 10/22. 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 11/162:30 pm -
2 stops12h 15m
Thu 1/76:10 am -
1 stop10h 30m
Deal found 10/22![WestJet logo]()
$363
This Kiwi.com deal was found by Cheapflights users on 10/22. 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 11/164:27 pm -
2 stops19h 33m
Fri 11/204:35 pm -
1 stop19h 06m
Deal found 10/22![Multiple Airlines logo]()
$536
This Justfly.com deal was found by Cheapflights users on 10/24. 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.
Tue 11/172:30 pm -
2 stops12h 15m
Tue 11/247:30 am -
1 stop9h 10m
Deal found 10/24![WestJet logo]()
$401
This Kiwi.com deal was found by Cheapflights users on 10/26. 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.
Tue 11/179:18 pm -
1 stop11h 01m
Fri 11/204:35 pm -
1 stop19h 06m
Deal found 10/26![Multiple Airlines logo]()
$534
This Kiwi.com deal was found by Cheapflights users on 10/25. 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 11/199:13 pm -
1 stop30h 38m
Tue 12/16:10 am -
1 stop10h 30m
Deal found 10/25![Multiple Airlines logo]()
$412
This Kiwi.com deal was found by Cheapflights users on 10/24. 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.
Sat 11/212:20 pm -
2 stops12h 25m
Tue 12/17:30 am -
1 stop9h 10m
Deal found 10/24![WestJet logo]()
$389
This Kiwi.com deal was found by Cheapflights users on 10/25. 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.
Sat 11/214:37 pm -
2 stops19h 23m
Tue 12/110:30 am -
1 stop10h 41m
Deal found 10/25![Multiple Airlines logo]()
$552
This Kiwi.com deal was found by Cheapflights users on 10/26. 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.
Tue 11/242:30 pm -
2 stops12h 15m
Tue 12/17:30 am -
1 stop9h 10m
Deal found 10/26![WestJet logo]()
$393
This Justfly.com deal was found by Cheapflights users on 10/25. 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.
Wed 11/252:30 pm -
2 stops12h 15m
Tue 12/17:30 am -
1 stop9h 10m
Deal found 10/25![WestJet logo]()
$409
This Kiwi.com deal was found by Cheapflights users on 10/26. 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 11/262:30 pm -
2 stops12h 15m
Tue 12/16:10 am -
1 stop10h 30m
Deal found 10/26![WestJet logo]()
$417
This Kiwi.com deal was found by Cheapflights users on 10/23. 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.
Sat 11/282:20 pm -
2 stops12h 25m
Sat 12/59:50 am -
1 stop11h 23m
Deal found 10/23![Multiple Airlines logo]()
$414
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 October 27, 2026.
Search for one-way flight options from Seattle to Toronto. Find affordable one-way fares based on user searches. Data last updated October 27, 2026.
This Kiwi.com deal was found by Cheapflights users on 10/23. 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 12/71:21 pm -
2 stops14h 31m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/23![Multiple Airlines logo]()
$172
This Kiwi.com deal was found by Cheapflights users on 10/23. 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 11/162:30 pm -
2 stops12h 15m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/23![WestJet logo]()
$180
This Kiwi.com deal was found by Cheapflights users on 10/23. 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 11/184:27 pm -
3 stops46h 48m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/23![Multiple Airlines logo]()
$180
This Kiwi.com deal was found by Cheapflights users on 10/24. 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 12/148:56 pm -
3 stops46h 59m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/24![Multiple Airlines logo]()
$181
This Kiwi.com deal was found by Cheapflights users on 10/23. 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 11/232:30 pm -
2 stops12h 15m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/23![WestJet logo]()
$182
This Kiwi.com deal was found by Cheapflights users on 10/23. 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.
Sat 11/212:20 pm -
2 stops12h 25m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/23![WestJet logo]()
$183
This Kiwi.com deal was found by Cheapflights users on 10/25. 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 12/41:32 pm -
2 stops31h 15m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/25![Multiple Airlines logo]()
$184
This Jetabroad deal was found by Cheapflights users on 10/22. 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.
Sat 12/122:20 pm -
2 stops12h 25m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/22![WestJet logo]()
$185
This Justfly.com deal was found by Cheapflights users on 10/23. 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 12/212:30 pm -
2 stops12h 15m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/23![WestJet logo]()
$188
This FlightHub deal was found by Cheapflights users on 10/24. 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.
Tue 11/172:30 pm -
2 stops12h 15m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/24![WestJet logo]()
$191
This Kiwi.com deal was found by Cheapflights users on 10/24. 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 11/222:30 pm -
2 stops12h 15m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/24![WestJet logo]()
$192
This Kiwi.com deal was found by Cheapflights users on 10/23. 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 11/164:27 pm -
3 stops41h 23m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/23![Multiple Airlines logo]()
$209
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 October 27, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $362 (Kiwi.com) |
One-way from | $172 (Kiwi.com) |
Popular in | July |
Cheapest in | January |
Average price | $591 |
Good round-trip deal | $578 or less |
Good one-way deal | $310 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 October 27, 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 - YYZ Toronto Pearson Intl
SEAYYZ
Seattle/Tacoma Intl
Sun 1/3
2:30 pm-5:45 am
2 stops12h 15m
Toronto Pearson Intl
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$202
Quickest round-trip
SeattleToronto
SEA Seattle/Tacoma Intl - YYZ Toronto Pearson Intl
SEAYYZ
Seattle/Tacoma Intl
Sat 12/26
8:33 am-4:05 pm
Nonstop4h 32m
Toronto Pearson Intl
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$215
SeattleToronto
SEA Seattle/Tacoma Intl - YTZ Toronto Island
SEAYTZ
Seattle/Tacoma Intl
Sat 11/21
4:37 pm-3:00 pm
2 stops19h 23m
Toronto Island
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$215
SeattleToronto
SEA Seattle/Tacoma Intl - YYZ Toronto Pearson Intl
SEAYYZ
Seattle/Tacoma Intl
Tue 1/5
8:29 am-4:05 pm
Nonstop4h 36m
Toronto Pearson Intl
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$215
SeattleToronto
SEA Seattle/Tacoma Intl - YYZ Toronto Pearson Intl
SEAYYZ
Seattle/Tacoma Intl
Wed 1/6
8:29 am-4:05 pm
Nonstop4h 36m
Toronto Pearson Intl
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$215
SeattleToronto
SEA Seattle/Tacoma Intl - YYZ Toronto Pearson Intl
SEAYYZ
Seattle/Tacoma Intl
Tue 12/15
7:15 am-9:56 pm
2 stops11h 41m
Toronto Pearson Intl
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$224
SeattleToronto
SEA Seattle/Tacoma Intl - YYZ Toronto Pearson Intl
SEAYYZ
Seattle/Tacoma Intl
Fri 1/1
8:33 am-4:05 pm
Nonstop4h 32m
Toronto Pearson Intl
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$226
SeattleToronto
SEA Seattle/Tacoma Intl - YYZ Toronto Pearson Intl
SEAYYZ
Seattle/Tacoma Intl
Fri 1/8
8:29 am-4:05 pm
Nonstop4h 36m
Toronto Pearson Intl
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$226
SeattleToronto
SEA Seattle/Tacoma Intl - YYZ Toronto Pearson Intl
SEAYYZ
Seattle/Tacoma Intl
Mon 12/28
8:33 am-4:05 pm
Nonstop4h 32m
Toronto Pearson Intl
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$226
SeattleToronto
SEA Seattle/Tacoma Intl - YYZ Toronto Pearson Intl
SEAYYZ
Seattle/Tacoma Intl
Fri 12/4
8:33 am-4:05 pm
Nonstop4h 32m
Toronto Pearson Intl
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$226
Showing 1-10 of 56 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 October.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy2 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-YYZ
SEA-YTZ
SEA-YHM
SEA-YKF
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
SEA-YTZ
SEA-YHM
SEA-YKF
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 $256). Flying from Seattle to Toronto in December is currently the most expensive (average of $637). 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 October 27, 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 $261 and $491 in December.The cheapest round-trip price found within the last 5 days was $362 on WestJet (Dec 15-Dec 18).
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.
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 October 27, 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.
Overall
7.9
Comfort
7.8
Entertainment
7.0
Boarding
8.1
Food
7.0
Crew
8.5
Reviews
1 / 20
6.0
GoodAnonymous,Jul 2026
SEA - LHR
Overall
7.9
Comfort
7.8
Entertainment
7.0
Boarding
8.1
Food
7.0
Crew
8.5
Reviews
1 / 20
6.0
GoodAnonymous,Jul 2026
SEA - LHR
Overall
7.9
Comfort
7.8
Entertainment
7.0
Boarding
8.1
Food
7.0
Crew
8.5
Reviews
1 / 20
6.0
GoodAnonymous,Jul 2026
SEA - LHR
Overall
7.9
Comfort
7.8
Entertainment
7.0
Boarding
8.1
Food
7.0
Crew
8.5
Reviews
1 / 20
6.0
GoodAnonymous,Jul 2026
SEA - LHR
Overall
7.9
Comfort
7.8
Entertainment
7.0
Boarding
8.1
Food
7.0
Crew
8.5
Reviews
1 / 20
6.0
GoodAnonymous,Jul 2026
SEA - LHR
Overall
7.9
Comfort
7.8
Entertainment
7.0
Boarding
8.1
Food
7.0
Crew
8.5
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 October 27, 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 October 27, 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 October 27, 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 October 27, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$132 | Average$445 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$142 | Average$393 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$240 | Average$366 | FlexibilityNo cancel fee | On-time60% | |
| Cheapest$245 | Average$528 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$277 | Average$579 | FlexibilityNo cancel fee | On-time69% |