$184+ Cheap flights from Toronto (YTO) to Seattle (SEA)
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 10/19. Fares are subject to change and may not be available on all flights or dates of travel.
YTO — SEA
Oct 28 — Nov 41
Round-trip
1 adult, Economy
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Find cheap flights from Toronto to Seattle 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 Toronto to Seattle/Tacoma Intl are usually found in February or March, booked 74 days in advance, depart on a Friday or Thursday and return on a Tuesday
Cheap flight deals from Toronto to Seattle
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Cheapest flights from Toronto to SeattleExplore the most affordable flight options available from Toronto to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 28, 2026.
Explore the most affordable flight options available from Toronto to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 28, 2026.
This Trip.com deal was found by Cheapflights users on 9/27. 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.
Sat 10/1012:00 pm -
1 stop9h 45m
Fri 10/2310:30 am -
1 stop9h 15m
Deal found 9/27![WestJet logo]()
$321
This FlightHub deal was found by Cheapflights users on 9/26. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/106:10 am -
2 stops15h 35m
Tue 10/137:35 pm -
1 stop7h 10m
Deal found 9/26![WestJet logo]()
$322
This FlightHub deal was found by Cheapflights users on 9/24. 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.
Thu 10/89:00 am -
1 stop12h 45m
Fri 10/1610:30 am -
1 stop9h 15m
Deal found 9/24![WestJet logo]()
$324
This FlightHub deal was found by Cheapflights users on 9/24. 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.
Thu 10/86:10 am -
2 stops15h 35m
Thu 10/1510:30 am -
1 stop9h 15m
Deal found 9/24![WestJet logo]()
$325
This FlightHub deal was found by Cheapflights users on 9/27. 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 10/1112:40 pm -
2 stops9h 05m
Thu 11/122:30 pm -
2 stops12h 15m
Deal found 9/27![WestJet logo]()
$326
This WestJet deal was found by Cheapflights users on 9/26. 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 WestJet is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/1012:00 pm -
1 stop9h 45m
Tue 10/207:35 pm -
1 stop8h 20m
Deal found 9/26![WestJet logo]()
$327
This Kiwi.com deal was found by Cheapflights users on 9/24. 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 10/89:00 am -
1 stop12h 45m
Tue 10/137:35 pm -
1 stop7h 10m
Deal found 9/24![WestJet logo]()
$328
This FlightHub deal was found by Cheapflights users on 9/26. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/127:30 am -
1 stop9h 10m
Tue 11/172:30 pm -
1 stop25h 50m
Deal found 9/26![WestJet logo]()
$329
This FlightHub deal was found by Cheapflights users on 9/26. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/148:40 pm -
1 stop25h 05m
Tue 10/207:35 pm -
1 stop21h 15m
Deal found 9/26![WestJet logo]()
$330
This Justfly.com deal was found by Cheapflights users on 9/26. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/156:10 am -
2 stops15h 35m
Fri 10/167:35 pm -
1 stop7h 10m
Deal found 9/26![WestJet logo]()
$330
This FlightHub deal was found by Cheapflights users on 9/26. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/146:10 pm -
1 stop18h 30m
Tue 10/207:35 pm -
1 stop18h 40m
Deal found 9/26![WestJet logo]()
$331
This Kiwi.com deal was found by Cheapflights users on 9/24. 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 10/1112:00 pm -
1 stop9h 45m
Sun 10/1810:30 am -
2 stops8h 05m
Deal found 9/24![WestJet logo]()
$331
Best flights from Toronto to SeattleDiscover carefully curated flight deals from Toronto to Seattle that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 28, 2026.
Discover carefully curated flight deals from Toronto to Seattle that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 28, 2026.
This FlightHub deal was found by Cheapflights users on 9/26. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/148:40 pm -
1 stop25h 05m
Tue 10/207:35 pm -
1 stop21h 15m
Deal found 9/26![WestJet logo]()
$330
This Mytrip deal was found by Cheapflights users on 9/25. 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.
Sun 10/188:40 pm -
1 stop25h 05m
Fri 10/237:35 pm -
1 stop16h 25m
Deal found 9/25![Multiple Airlines logo]()
$384
This Delta deal was found by Cheapflights users on 9/25. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/3112:10 pm -
1 stop9h 25m
Wed 11/411:10 pm -
1 stop6h 39m
Deal found 9/25![Delta logo]()
$400
This FlightHub deal was found by Cheapflights users on 9/25. 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.
Tue 10/136:10 pm -
1 stop18h 30m
Sat 10/177:35 pm -
1 stop18h 40m
Deal found 9/25![WestJet logo]()
$332
This FlightHub deal was found by Cheapflights users on 9/25. 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 10/146:10 pm -
1 stop18h 30m
Thu 10/157:35 pm -
1 stop18h 40m
Deal found 9/25![WestJet logo]()
$334
This Delta deal was found by Cheapflights users on 9/25. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/285:49 pm -
1 stop7h 16m
Wed 11/411:10 pm -
1 stop6h 39m
Deal found 9/25![Delta logo]()
$400
This FlightHub deal was found by Cheapflights users on 9/24. 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.
Fri 10/166:10 pm -
1 stop18h 30m
Sun 10/187:35 pm -
1 stop18h 40m
Deal found 9/24![WestJet logo]()
$335
This Mytrip deal was found by Cheapflights users on 9/23. 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.
Wed 10/218:40 pm -
1 stop25h 05m
Fri 10/237:35 pm -
1 stop16h 25m
Deal found 9/23![Multiple Airlines logo]()
$420
This Delta deal was found by Cheapflights users on 9/23. 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 10/246:00 am -
1 stop11h 45m
Sat 10/3110:59 pm -
1 stop10h 26m
Deal found 9/23![Delta logo]()
$402
This FlightHub deal was found by Cheapflights users on 9/25. 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 10/216:10 pm -
1 stop18h 30m
Wed 10/283:30 pm -
1 stop20h 55m
Deal found 9/25![WestJet logo]()
$338
This FlightHub deal was found by Cheapflights users on 9/24. 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.
Fri 10/168:40 pm -
1 stop16h 00m
Sun 10/187:35 pm -
1 stop21h 15m
Deal found 9/24![WestJet logo]()
$339
This Delta deal was found by Cheapflights users on 9/25. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/116:00 am -
1 stop11h 23m
Sat 2/209:55 pm -
1 stop10h 19m
Deal found 9/25![Delta logo]()
$430
This Trip.com deal was found by Cheapflights users on 9/26. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/146:10 pm -
1 stop27h 35m
Mon 10/197:35 pm -
1 stop18h 40m
Deal found 9/26![WestJet logo]()
$340
This Mytrip deal was found by Cheapflights users on 9/24. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/246:05 am -
2 stops15h 40m
Sat 10/318:40 am -
1 stop7h 57m
Deal found 9/24![Multiple Airlines logo]()
$513
This Delta deal was found by Cheapflights users on 9/23. 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.
Fri 11/132:20 pm -
1 stop7h 17m
Thu 12/311:15 pm -
1 stop6h 40m
Deal found 9/23![Delta logo]()
$432
This Trip.com deal was found by Cheapflights users on 9/27. 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.
Sun 10/118:40 pm -
1 stop16h 00m
Thu 10/157:35 pm -
1 stop21h 15m
Deal found 9/27![WestJet logo]()
$341
This Justfly.com deal was found by Cheapflights users on 9/26. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/123:25 pm -
1 stop25h 15m
Sun 11/1511:26 am -
1 stop9h 26m
Deal found 9/26![Multiple Airlines logo]()
$520
This Delta deal was found by Cheapflights users on 9/23. 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.
Sun 11/156:15 am -
1 stop9h 16m
Mon 11/1611:15 pm -
1 stop9h 04m
Deal found 9/23![Delta logo]()
$432
This Delta deal was found by Cheapflights users on 9/25. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/116:00 am -
1 stop11h 23m
Fri 2/196:00 am -
1 stop7h 04m
Deal found 9/25![Delta logo]()
$445
This Mytrip deal was found by Cheapflights users on 9/25. 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.
Mon 10/197:05 pm -
2 stops26h 40m
Fri 10/237:35 pm -
2 stops19h 45m
Deal found 9/25![Multiple Airlines logo]()
$542
This Justfly.com deal was found by Cheapflights users on 9/24. 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.
Sun 10/118:40 pm -
1 stop16h 00m
Sun 10/187:35 pm -
1 stop21h 15m
Deal found 9/24![WestJet logo]()
$375
This Delta deal was found by Cheapflights users on 9/25. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/299:40 am -
1 stop11h 55m
Sun 11/111:10 pm -
1 stop6h 39m
Deal found 9/25![Delta logo]()
$445
This Flightnetwork deal was found by Cheapflights users on 9/25. 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 Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/287:05 am -
1 stop8h 56m
Wed 11/42:30 pm -
1 stop20h 55m
Deal found 9/25![Multiple Airlines logo]()
$552
This WestJet deal was found by Cheapflights users on 9/27. 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.
Mon 10/198:40 pm -
1 stop25h 05m
Thu 10/227:35 pm -
1 stop21h 15m
Deal found 9/27![WestJet logo]()
$387
This Delta deal was found by Cheapflights users on 9/23. 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.
Wed 10/216:00 am -
1 stop11h 45m
Tue 10/276:00 am -
1 stop8h 18m
Deal found 9/23![Delta logo]()
$458
This Mytrip deal was found by Cheapflights users on 9/27. 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 10/106:55 pm -
1 stop17h 45m
Tue 10/137:35 pm -
1 stop18h 40m
Deal found 9/27![Multiple Airlines logo]()
$567
This Delta deal was found by Cheapflights users on 9/26. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/106:30 am -
2 stops11h 55m
Tue 11/1711:40 pm -
1 stop8h 29m
Deal found 9/26![Delta logo]()
$466
This Mytrip deal was found by Cheapflights users on 9/25. 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.
Fri 10/236:05 am -
3 stops15h 40m
Fri 10/303:30 pm -
3 stops20h 55m
Deal found 9/25![Multiple Airlines logo]()
$585
This Flightnetwork deal was found by Cheapflights users on 9/25. 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 Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/148:40 pm -
1 stop25h 05m
Sat 10/177:35 pm -
1 stop21h 15m
Deal found 9/25![WestJet logo]()
$480
This Delta deal was found by Cheapflights users on 9/25. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 1/65:25 pm -
1 stop9h 44m
Wed 1/138:30 am -
2 stops12h 31m
Deal found 9/25![Delta logo]()
$482
Last-minute flights from Toronto to SeattleDiscover last-minute flight deals from Toronto to Seattle. Data last updated September 28, 2026 and is based on user searches.
Discover last-minute flight deals from Toronto to Seattle. Data last updated September 28, 2026 and is based on user searches.
This FlightHub deal was found by Cheapflights users on 9/24. 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.
Thu 10/89:00 am -
1 stop12h 45m
Fri 10/1610:30 am -
1 stop9h 15m
Deal found 9/24![WestJet logo]()
$324
This FlightHub deal was found by Cheapflights users on 9/24. 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.
Thu 10/86:10 am -
2 stops15h 35m
Thu 10/1510:30 am -
1 stop9h 15m
Deal found 9/24![WestJet logo]()
$325
This Kiwi.com deal was found by Cheapflights users on 9/24. 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 10/89:00 am -
1 stop12h 45m
Tue 10/137:35 pm -
1 stop7h 10m
Deal found 9/24![WestJet logo]()
$328
This Trip.com deal was found by Cheapflights users on 9/27. 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.
Sat 10/1012:00 pm -
1 stop9h 45m
Fri 10/2310:30 am -
1 stop9h 15m
Deal found 9/27![WestJet logo]()
$321
This FlightHub deal was found by Cheapflights users on 9/26. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/106:10 am -
2 stops15h 35m
Tue 10/137:35 pm -
1 stop7h 10m
Deal found 9/26![WestJet logo]()
$322
This WestJet deal was found by Cheapflights users on 9/26. 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 WestJet is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/1012:00 pm -
1 stop9h 45m
Wed 10/147:35 pm -
1 stop8h 20m
Deal found 9/26![WestJet logo]()
$327
This FlightHub deal was found by Cheapflights users on 9/27. 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 10/1112:40 pm -
2 stops9h 05m
Thu 11/122:30 pm -
2 stops12h 15m
Deal found 9/27![WestJet logo]()
$326
This Kiwi.com deal was found by Cheapflights users on 9/24. 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 10/1112:00 pm -
1 stop9h 45m
Sun 10/1810:30 am -
2 stops8h 05m
Deal found 9/24![WestJet logo]()
$331
This FlightHub deal was found by Cheapflights users on 9/26. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/148:40 pm -
1 stop25h 05m
Tue 10/207:35 pm -
1 stop21h 15m
Deal found 9/26![WestJet logo]()
$330
This FlightHub deal was found by Cheapflights users on 9/26. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/146:10 pm -
1 stop18h 30m
Tue 10/207:35 pm -
1 stop18h 40m
Deal found 9/26![WestJet logo]()
$331
This FlightHub deal was found by Cheapflights users on 9/25. 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 10/146:10 pm -
1 stop18h 30m
Sun 10/187:35 pm -
1 stop18h 40m
Deal found 9/25![WestJet logo]()
$332
This Justfly.com deal was found by Cheapflights users on 9/26. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/156:10 am -
2 stops15h 35m
Fri 10/167:35 pm -
1 stop7h 10m
Deal found 9/26![WestJet logo]()
$330
One-way flights from Toronto to SeattleSearch for one-way flight options from Toronto to Seattle. Find affordable one-way fares based on user searches. Data last updated September 28, 2026.
Search for one-way flight options from Toronto to Seattle. Find affordable one-way fares based on user searches. Data last updated September 28, 2026.
This Kissandfly.com deal was found by Cheapflights users on 9/25. 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 Kissandfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/196:10 pm -
1 stop27h 35m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/25![WestJet logo]()
$184
This Trip.com deal was found by Cheapflights users on 9/25. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/216:10 pm -
1 stop18h 30m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/25![WestJet logo]()
$188
This Trip.com deal was found by Cheapflights users on 9/26. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/116:10 pm -
1 stop18h 30m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/26![WestJet logo]()
$189
This Justfly.com deal was found by Cheapflights users on 9/24. 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.
Mon 10/126:10 pm -
1 stop27h 35m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/24![WestJet logo]()
$191
This FlightHub deal was found by Cheapflights users on 9/27. 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 12/83:25 pm -
1 stop25h 15m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/27![WestJet logo]()
$194
This FlightHub deal was found by Cheapflights users on 9/26. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/136:10 pm -
1 stop27h 35m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/26![WestJet logo]()
$199
This Mytrip deal was found by Cheapflights users on 9/26. 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 10/166:10 pm -
1 stop18h 30m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/26![WestJet logo]()
$202
This Trip.com deal was found by Cheapflights users on 9/23. 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.
Tue 12/153:25 pm -
1 stop25h 15m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/23![WestJet logo]()
$204
This WestJet deal was found by Cheapflights users on 9/27. 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.
Thu 10/226:10 pm -
1 stop27h 35m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/27![WestJet logo]()
$206
This Kiwi.com deal was found by Cheapflights users on 9/28. 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 10/2211:10 pm -
3 stops22h 35m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/28![WestJet logo]()
$224
This FlightHub deal was found by Cheapflights users on 9/27. 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 3/42:10 pm -
2 stops26h 30m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/27![WestJet logo]()
$225
This Kiwi.com deal was found by Cheapflights users on 9/28. 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 10/2011:10 pm -
2 stops13h 30m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/28![WestJet logo]()
$227
Find flight deals from Toronto to Seattle
Discover tips and strategies to find the most affordable flight options for your journey from Toronto (YTO) to Seattle (SEA). 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 28, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $320 (Justfly.com) |
One-way from | $184 (Kissandfly.com) |
Popular in | June |
Cheapest in | February |
Average price | $389 |
Good round-trip deal | $435 or less |
Good one-way deal | $244 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Toronto to Seattle 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 28, 2026.
Use the filters below to find and compare flights from Toronto to Seattle that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
HamiltonSeattle
YHM Hamilton - SEA Seattle/Tacoma Intl
YHMSEA
Hamilton
Mon 10/19
6:10 pm-6:45 pm
1 stop27h 35m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$184
HamiltonSeattle
YHM Hamilton - SEA Seattle/Tacoma Intl
YHMSEA
Hamilton
Fri 10/23
6:10 pm-6:45 pm
1 stop27h 35m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$188
HamiltonSeattle
YHM Hamilton - SEA Seattle/Tacoma Intl
YHMSEA
Hamilton
Tue 10/13
6:10 pm-6:45 pm
1 stop27h 35m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$190
HamiltonSeattle
YHM Hamilton - SEA Seattle/Tacoma Intl
YHMSEA
Hamilton
Thu 11/12
3:25 pm-1:40 pm
1 stop25h 15m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$193
HamiltonSeattle
YHM Hamilton - SEA Seattle/Tacoma Intl
YHMSEA
Hamilton
Wed 10/21
6:10 pm-9:40 am
1 stop18h 30m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$193
HamiltonSeattle
YHM Hamilton - SEA Seattle/Tacoma Intl
YHMSEA
Hamilton
Tue 12/8
3:25 pm-1:40 pm
1 stop25h 15m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$194
HamiltonSeattle
YHM Hamilton - SEA Seattle/Tacoma Intl
YHMSEA
Hamilton
Mon 10/12
6:10 pm-6:45 pm
1 stop27h 35m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$201
HamiltonSeattle
YHM Hamilton - SEA Seattle/Tacoma Intl
YHMSEA
Hamilton
Tue 12/15
3:25 pm-1:40 pm
1 stop25h 15m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$204
TorontoSeattle
YYZ Toronto Pearson Intl - SEA Seattle/Tacoma Intl
YYZSEA
Toronto Pearson Intl
Tue 11/10
2:20 pm-9:58 pm
1 stop10h 38m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$229
TorontoSeattle
YKF Toronto Region of Waterloo Intl - SEA Seattle/Tacoma Intl
YKFSEA
Toronto Region of Waterloo Intl
Wed 10/21
8:40 pm-9:40 am
1 stop16h 00m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$233
Showing 1-10 of 59 resultsSorted by cheapest first
Compare providers for flights from Toronto to Seattle
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 Toronto to Seattle in September.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy1 star | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on Toronto-Seattle flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Toronto-Seattle flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Toronto-Seattle flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Toronto-Seattle 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 Toronto-Seattle 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 Toronto to Seattle
Have a flexible travel schedule? Discover the best time to fly to Seattle from Toronto with our price prediction graph.
YTO-SEA
YHM-SEA
YYZ-SEA
YKF-SEA
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 Toronto to Seattle
YTO-SEA
YHM-SEA
YYZ-SEA
YKF-SEA
What is the cheapest month to book a flight from Toronto to Seattle?
Currently, February is the cheapest month in which you can book a flight from Toronto to Seattle (average of $239). Flying from Toronto to Seattle in June is currently the most expensive (average of $460). 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 YTO to SEA?
Find hourly flight availability from Toronto to Seattle. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 28, 2026.
Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Toronto to Seattle as you normally would.
Weekly flight availability from Toronto to Seattle
Explore weekly flight availability from Toronto to Seattle. 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 28, 2026.
The most flights from YTO to SEA are scheduled on a Thursday (4 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (2 on average).
How much does it cost to fly round-trip from Toronto to Seattle?
Airfare is below average for this route at the moment.
Toronto to Seattle flights typically cost between $349 and $457 in January.The cheapest round-trip price found within the last 5 days was $320 on WestJet (Jan 8-Jan 20).
How often are flights from Toronto to Seattle delayed?
About 30% of weekly flights between Toronto and Seattle have experienced delays in the past year, with the average delay time being 154 minutes.
What is the most punctual flight time for Toronto to Seattle flights?
Historically, flights departing in the early afternoon are less likely to be delayed, whereas flights leaving in the evening tend to experience delays more often.
What day of the week experiences the fewest flight delays on this route?
Saturday tends to have the lowest number of delays on this route, whereas Monday has historically faced a higher average of delays compared to other days of the week.
Which airline has the best punctuality record on Toronto to Seattle flights?
Over the last year, Alaska Airlines have had the lowest number of delays on this route, with just 18% of flights being delayed.
How far ahead should I book a flight from Toronto to Seattle?
The price you pay for your flight from Toronto to Seattle may vary depending on when you book. For the best chance of a lower fare, look to book 32 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.
Reviews of airlines servicing Seattle
Get insights into the airlines that provide service to Seattle. 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 Seattle. Reviews last updated September 28, 2026.
Peruse reviews from past customers who have flown with Alaska Airlines,Delta, andUnited Airlines from Toronto to Seattle to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Food
7.0
Overall
7.9
Boarding
8.1
Crew
8.5
Comfort
7.8
Entertainment
7.0
Reviews
1 / 20
10.0
ExcellentAnonymous,Jun 2026
LHR - SEA
Food
7.0
Overall
7.9
Boarding
8.1
Crew
8.5
Comfort
7.8
Entertainment
7.0
Reviews
1 / 20
10.0
ExcellentAnonymous,Jun 2026
LHR - SEA
Food
7.0
Overall
7.9
Boarding
8.1
Crew
8.5
Comfort
7.8
Entertainment
7.0
Reviews
1 / 20
10.0
ExcellentAnonymous,Jun 2026
LHR - SEA
Food
7.0
Overall
7.9
Boarding
8.1
Crew
8.5
Comfort
7.8
Entertainment
7.0
Reviews
1 / 20
10.0
ExcellentAnonymous,Jun 2026
LHR - SEA
Food
7.0
Overall
7.9
Boarding
8.1
Crew
8.5
Comfort
7.8
Entertainment
7.0
Reviews
1 / 20
10.0
ExcellentAnonymous,Jun 2026
LHR - SEA
Food
7.0
Overall
7.9
Boarding
8.1
Crew
8.5
Comfort
7.8
Entertainment
7.0
Reviews
1 / 20
10.0
ExcellentAnonymous,Jun 2026
LHR - SEA
Related info for your journey
Find useful and relevant information for your journey from Toronto to Seattle. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Traveling to a place near Seattle?
Book flights to Seattle if you plan to visit one of these locationsSeaTac
Renton
Tacoma
Lacey
Leavenworth
Olympia
Tukwila
Snoqualmie
Puyallup
Lynnwood
Centralia
Kent
Tumwater
Ellensburg
Issaquah
Marysville
Ocean Shores
Lakewood
Fife
Poulsbo
Browse thousands of different options on Cheapflights for your next trip
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
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Search flights from Toronto to Seattle by cabin class
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Toronto and Seattle flights
Browse other Toronto and Seattle flight options. Last updated on September 28, 2026.
Other flights from Toronto
Browse through other flights departing from Toronto. Flights are based on user searches made on Cheapflights and were last updated on September 28, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Other flights to Seattle
Explore flights to Seattle departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on September 28, 2026.
Top 5 airlines flying from Toronto to Seattle
Discover the top 5 airlines that operate flights from Toronto to Seattle. 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 28, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$202 | Average$437 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$206 | Average$444 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$209 | Average$455 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$213 | Average$355 | FlexibilityNo cancel fee | On-time60% | |
| Cheapest$219 | Average$464 | FlexibilityNo cancel fee | On-time69% |