$126+ Cheap flights from Washington to Ontario
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 10/20. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — YYZ
Oct 18 — Oct 251
Round-trip
1 adult, Economy
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Cheapest flights from Washington to OntarioExplore the most affordable flight options available from Washington to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 18, 2026.
Explore the most affordable flight options available from Washington to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 18, 2026.
This Kiwi.com deal was found by Cheapflights users on 9/14. 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 10/107:35 pm -
1 stop7h 00m
Mon 10/191:20 pm -
1 stop8h 25m
Deal found 9/14![WestJet logo]()
$277
This Trip.com deal was found by Cheapflights users on 9/16. 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 10/167:35 pm -
1 stop7h 00m
Thu 10/221:20 pm -
1 stop8h 25m
Deal found 9/16![WestJet logo]()
$287
This Kiwi.com deal was found by Cheapflights users on 9/15. 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 10/77:35 pm -
1 stop7h 00m
Wed 10/148:15 pm -
1 stop16h 25m
Deal found 9/15![WestJet logo]()
$297
This Kiwi.com deal was found by Cheapflights users on 9/16. 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 10/77:35 pm -
1 stop7h 00m
Sun 10/114:15 pm -
1 stop20h 25m
Deal found 9/16![WestJet logo]()
$298
This Kiwi.com deal was found by Cheapflights users on 9/15. 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 10/22:30 pm -
2 stops11h 40m
Sun 10/47:00 am -
1 stop9h 50m
Deal found 9/15![WestJet logo]()
$299
This Kiwi.com deal was found by Cheapflights users on 9/15. 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 10/207:35 pm -
1 stop8h 30m
Fri 10/236:45 am -
2 stops15h 00m
Deal found 9/15![WestJet logo]()
$302
This Kiwi.com deal was found by Cheapflights users on 9/14. 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 10/177:35 pm -
1 stop8h 30m
Thu 10/226:45 am -
2 stops15h 00m
Deal found 9/14![WestJet logo]()
$306
This Kiwi.com deal was found by Cheapflights users on 9/18. 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 10/197:35 pm -
1 stop7h 00m
Thu 10/2212:25 pm -
2 stops9h 20m
Deal found 9/18![WestJet logo]()
$308
This Kiwi.com deal was found by Cheapflights users on 9/15. 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 9/282:30 pm -
2 stops11h 40m
Sun 10/49:00 am -
1 stop7h 50m
Deal found 9/15![WestJet logo]()
$310
This Kiwi.com deal was found by Cheapflights users on 9/15. 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 10/167:35 pm -
1 stop8h 30m
Fri 10/236:45 am -
2 stops15h 00m
Deal found 9/15![WestJet logo]()
$310
This Kiwi.com deal was found by Cheapflights users on 9/16. 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 10/167:35 pm -
1 stop8h 30m
Wed 10/216:45 am -
2 stops15h 00m
Deal found 9/16![WestJet logo]()
$314
This Kiwi.com deal was found by Cheapflights users on 9/16. 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 10/177:35 pm -
1 stop8h 30m
Tue 10/208:00 pm -
1 stop16h 40m
Deal found 9/16![WestJet logo]()
$317
Best flights from Washington to OntarioDiscover carefully curated flight deals from Washington to Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 18, 2026.
Discover carefully curated flight deals from Washington to Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 18, 2026.
This Trip.com deal was found by Cheapflights users on 9/16. 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 10/167:35 pm -
1 stop7h 00m
Thu 10/221:20 pm -
1 stop8h 25m
Deal found 9/16![WestJet logo]()
$287
This United Airlines deal was found by Cheapflights users on 9/13. 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 10/111:59 pm -
1 stop11h 25m
Fri 10/25:15 pm -
1 stop8h 08m
Deal found 9/13![United Airlines logo]()
$365
This Delta deal was found by Cheapflights users on 9/14. 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 10/811:12 pm -
1 stop11h 24m
Tue 10/1311:38 am -
1 stop13h 11m
Deal found 9/14![Delta logo]()
$389
This United deal was found by Cheapflights users on 9/15. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/710:43 am -
1 stop7h 49m
Sun 10/116:15 am -
1 stop15h 56m
Deal found 9/15![Multiple Airlines logo]()
$398
This American Airlines deal was found by Cheapflights users on 9/13. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/1111:09 pm -
2 stops9h 50m
Wed 12/1610:45 am -
2 stops12h 02m
Deal found 9/13![American Airlines logo]()
$404
This Air Canada deal was found by Cheapflights users on 9/13. 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.
Sat 10/1010:10 am -
1 stop7h 26m
Sat 10/179:30 pm -
1 stop15h 01m
Deal found 9/13![Air Canada logo]()
$405
This Alaska Airlines deal was found by Cheapflights users on 9/17. 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 10/178:00 am -
Nonstop4h 45m
Tue 10/204:55 pm -
Nonstop5h 31m
Deal found 9/17![Alaska Airlines logo]()
$503
This Kiwi.com deal was found by Cheapflights users on 9/13. 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 00m
Sun 10/1112:25 pm -
2 stops9h 20m
Deal found 9/13![WestJet logo]()
$346
This United Airlines deal was found by Cheapflights users on 9/14. 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 10/207:33 pm -
1 stop9h 43m
Wed 10/2111:23 am -
1 stop13h 04m
Deal found 9/14![United Airlines logo]()
$370
This Delta deal was found by Cheapflights users on 9/15. 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 12/111:55 pm -
1 stop6h 31m
Wed 12/1612:20 pm -
1 stop12h 36m
Deal found 9/15![Delta logo]()
$389
This Trip.com deal was found by Cheapflights users on 9/14. 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 10/157:35 pm -
1 stop21h 15m
Mon 10/198:40 pm -
1 stop25h 05m
Deal found 9/14![WestJet logo]()
$362
This United Airlines deal was found by Cheapflights users on 9/14. 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 9/297:02 am -
1 stop7h 54m
Sun 10/46:10 am -
1 stop8h 51m
Deal found 9/14![United Airlines logo]()
$389
This Delta deal was found by Cheapflights users on 9/14. 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 10/1511:00 pm -
1 stop10h 19m
Sun 10/1811:38 am -
1 stop13h 11m
Deal found 9/14![Delta logo]()
$389
This United deal was found by Cheapflights users on 9/16. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/2911:59 pm -
1 stop11h 01m
Wed 1/67:50 am -
2 stops9h 51m
Deal found 9/16![Multiple Airlines logo]()
$449
This FlightHub deal was found by Cheapflights users on 9/14. 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 9/14![WestJet logo]()
$374
This United Airlines deal was found by Cheapflights users on 9/15. 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 10/275:35 am -
1 stop7h 33m
Sat 10/316:45 am -
1 stop11h 35m
Deal found 9/15![United Airlines logo]()
$389
This Delta deal was found by Cheapflights users on 9/16. 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 11/1311:20 pm -
1 stop8h 59m
Sun 11/152:20 pm -
1 stop10h 47m
Deal found 9/16![Delta logo]()
$389
This Air Canada deal was found by Cheapflights users on 9/15. 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.
Sat 10/245:50 am -
1 stop7h 33m
Sat 10/317:45 am -
1 stop9h 52m
Deal found 9/15![Air Canada logo]()
$482
This FlightHub deal was found by Cheapflights users on 9/14. 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 10/157:35 pm -
1 stop21h 15m
Sun 10/188:40 pm -
1 stop16h 00m
Deal found 9/14![WestJet logo]()
$375
This Alaska Airlines deal was found by Cheapflights users on 9/15. 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 10/248:00 am -
Nonstop4h 45m
Wed 10/285:15 pm -
Nonstop5h 28m
Deal found 9/15![Alaska Airlines logo]()
$509
This United Airlines deal was found by Cheapflights users on 9/13. 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 10/147:02 am -
1 stop7h 54m
Wed 10/211:00 pm -
1 stop8h 53m
Deal found 9/13![United Airlines logo]()
$389
This Mytrip deal was found by Cheapflights users on 9/14. 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 10/1110:30 am -
2 stops8h 39m
Sat 10/176:05 am -
2 stops15h 40m
Deal found 9/14![Multiple Airlines logo]()
$474
This Delta deal was found by Cheapflights users on 9/14. 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 2/1911:55 am -
1 stop8h 40m
Sun 2/287:00 am -
2 stops15h 03m
Deal found 9/14![Delta logo]()
$395
This Air Canada deal was found by Cheapflights users on 9/14. 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.
Tue 10/278:40 am -
2 stops11h 31m
Thu 10/297:50 am -
2 stops13h 32m
Deal found 9/14![Air Canada logo]()
$493
This Alaska Airlines deal was found by Cheapflights users on 9/16. 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 10/178:00 am -
Nonstop4h 45m
Sat 10/244:55 pm -
Nonstop5h 31m
Deal found 9/16![Alaska Airlines logo]()
$510
This United Airlines deal was found by Cheapflights users on 9/14. 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.
Sat 10/1011:30 pm -
1 stop8h 10m
Fri 10/166:35 pm -
1 stop8h 59m
Deal found 9/14![United Airlines logo]()
$389
This Mytrip deal was found by Cheapflights users on 9/14. 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 10/246:05 am -
2 stops15h 40m
Deal found 9/14![Multiple Airlines logo]()
$477
This Delta deal was found by Cheapflights users on 9/14. 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.
Mon 2/226:15 am -
2 stops13h 55m
Mon 3/112:45 pm -
2 stops14h 06m
Deal found 9/14![Delta logo]()
$400
This American Airlines deal was found by Cheapflights users on 9/16. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/511:34 pm -
2 stops12h 54m
Mon 11/94:06 pm -
2 stops11h 29m
Deal found 9/16![American Airlines logo]()
$620
This Justfly.com deal was found by Cheapflights users on 9/18. 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.
Fri 10/911:10 pm -
1 stop15h 09m
Sun 10/119:30 am -
1 stop10h 30m
Deal found 9/18![WestJet logo]()
$431
Last-minute flights from Washington to OntarioDiscover last-minute flight deals from Washington to Ontario. Data last updated September 18, 2026 and is based on user searches.
Discover last-minute flight deals from Washington to Ontario. Data last updated September 18, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 9/15. 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 9/282:30 pm -
2 stops11h 40m
Sun 10/49:00 am -
1 stop7h 50m
Deal found 9/15![WestJet logo]()
$310
This Kiwi.com deal was found by Cheapflights users on 9/15. 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 10/22:30 pm -
2 stops11h 40m
Sun 10/47:00 am -
1 stop9h 50m
Deal found 9/15![WestJet logo]()
$299
This Kiwi.com deal was found by Cheapflights users on 9/15. 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 10/77:35 pm -
1 stop7h 00m
Wed 10/148:15 pm -
1 stop16h 25m
Deal found 9/15![WestJet logo]()
$297
This Kiwi.com deal was found by Cheapflights users on 9/16. 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 10/77:35 pm -
1 stop7h 00m
Sun 10/114:15 pm -
1 stop20h 25m
Deal found 9/16![WestJet logo]()
$298
This Kiwi.com deal was found by Cheapflights users on 9/14. 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 10/107:35 pm -
1 stop7h 00m
Mon 10/191:20 pm -
1 stop8h 25m
Deal found 9/14![WestJet logo]()
$277
This Trip.com deal was found by Cheapflights users on 9/16. 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 10/167:35 pm -
1 stop7h 00m
Thu 10/221:20 pm -
1 stop8h 25m
Deal found 9/16![WestJet logo]()
$287
This Kiwi.com deal was found by Cheapflights users on 9/15. 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 10/167:35 pm -
1 stop8h 30m
Fri 10/236:45 am -
2 stops15h 00m
Deal found 9/15![WestJet logo]()
$310
This Kiwi.com deal was found by Cheapflights users on 9/16. 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 10/167:35 pm -
1 stop8h 30m
Wed 10/216:45 am -
2 stops15h 00m
Deal found 9/16![WestJet logo]()
$314
This Kiwi.com deal was found by Cheapflights users on 9/14. 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 10/177:35 pm -
1 stop8h 30m
Wed 10/216:45 am -
2 stops15h 00m
Deal found 9/14![WestJet logo]()
$306
This Kiwi.com deal was found by Cheapflights users on 9/16. 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 10/177:35 pm -
1 stop8h 30m
Tue 10/208:00 pm -
1 stop16h 40m
Deal found 9/16![WestJet logo]()
$317
This Kiwi.com deal was found by Cheapflights users on 9/18. 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 10/197:35 pm -
1 stop7h 00m
Thu 10/2212:25 pm -
2 stops9h 20m
Deal found 9/18![WestJet logo]()
$308
This Kiwi.com deal was found by Cheapflights users on 9/15. 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 10/207:35 pm -
1 stop8h 30m
Fri 10/236:45 am -
2 stops15h 00m
Deal found 9/15![WestJet logo]()
$302
One-way flights from Washington to OntarioSearch for one-way flight options from Washington to Ontario. Find affordable one-way fares based on user searches. Data last updated September 18, 2026.
Search for one-way flight options from Washington to Ontario. Find affordable one-way fares based on user searches. Data last updated September 18, 2026.
This Kiwi.com deal was found by Cheapflights users on 9/17. 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 10/207:35 pm -
1 stop8h 30m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/17![WestJet logo]()
$126
This Kiwi.com deal was found by Cheapflights users on 9/17. 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 -
1 stop8h 30m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/17![WestJet logo]()
$128
This Kiwi.com deal was found by Cheapflights users on 9/16. 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 10/167:35 pm -
1 stop8h 30m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/16![WestJet logo]()
$130
This Kiwi.com deal was found by Cheapflights users on 9/16. 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 10/197:35 pm -
1 stop8h 30m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/16![WestJet logo]()
$133
This Kiwi.com deal was found by Cheapflights users on 9/13. 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 10/112:30 pm -
2 stops11h 40m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/13![WestJet logo]()
$135
This Kiwi.com deal was found by Cheapflights users on 9/14. 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 10/162:30 pm -
2 stops11h 40m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/14![WestJet logo]()
$139
This Kiwi.com deal was found by Cheapflights users on 9/14. 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 10/1510:30 am -
2 stops10h 55m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/14![WestJet logo]()
$145
This Trip.com deal was found by Cheapflights users on 9/17. 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 11/15:58 pm -
1 stop27h 03m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/17![Multiple Airlines logo]()
$148
This Trip.com deal was found by Cheapflights users on 9/15. 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 10/1010:30 am -
2 stops10h 55m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/15![WestJet logo]()
$150
This Kiwi.com deal was found by Cheapflights users on 9/16. 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 10/67:35 pm -
1 stop25h 10m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/16![WestJet logo]()
$156
This FlightHub deal was found by Cheapflights users on 9/16. 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 10/2110:30 am -
2 stops10h 55m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/16![WestJet logo]()
$158
This Jetabroad deal was found by Cheapflights users on 9/14. 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.
Wed 10/77:35 pm -
2 stops13h 55m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/14![WestJet logo]()
$158
Find flight deals from Washington to Ontario
Keep the following information in mind while searching for Washington to Ontario flight deals. Data was last updated September 18, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $277 (Kiwi.com) |
One-way from | $126 (Kiwi.com) |
Popular in | July |
Cheapest in | January |
Average price | $580 |
Good round-trip deal | $545 or less |
Good one-way deal | $309 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Washington to Ontario 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 18, 2026.
Use the filters below to find and compare flights from Washington to Ontario that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
PortlandToronto
PDX Portland - YYZ Toronto Pearson Intl
PDXYYZ
Portland
Sun 10/11
2:30 pm-5:10 am
2 stops11h 40m
Toronto Pearson Intl
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$135
PortlandToronto
PDX Portland - YYZ Toronto Pearson Intl
PDXYYZ
Portland
Fri 11/13
7:10 pm-6:52 am
1 stop8h 42m
Toronto Pearson Intl
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$161
PortlandToronto
PDX Portland - YYZ Toronto Pearson Intl
PDXYYZ
Portland
Tue 10/13
11:30 pm-9:54 am
1 stop7h 24m
Toronto Pearson Intl
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$165
PortlandToronto
PDX Portland - YYZ Toronto Pearson Intl
PDXYYZ
Portland
Thu 10/15
11:00 pm-10:23 am
1 stop8h 23m
Toronto Pearson Intl
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$165
PortlandToronto
PDX Portland - YYZ Toronto Pearson Intl
PDXYYZ
Portland
Thu 10/1
10:33 pm-9:19 am
1 stop7h 46m
Toronto Pearson Intl
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$165
PortlandToronto
PDX Portland - YYZ Toronto Pearson Intl
PDXYYZ
Portland
Thu 10/15
7:29 pm-7:00 am
1 stop8h 31m
Toronto Pearson Intl
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$165
SeattleMontreal
SEA Seattle/Tacoma Intl - YUL Montreal Pierre Elliott Trudeau Intl
SEAYUL
Seattle/Tacoma Intl
Fri 10/30
11:10 pm-11:57 am
1 stop9h 47m
Montreal Pierre Elliott Trudeau Intl
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$171
SeattleMontreal
SEA Seattle/Tacoma Intl - YUL Montreal Pierre Elliott Trudeau Intl
SEAYUL
Seattle/Tacoma Intl
Sat 10/31
1:42 pm-11:22 pm
1 stop6h 40m
Montreal Pierre Elliott Trudeau Intl
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$171
PortlandToronto
PDX Portland - YYZ Toronto Pearson Intl
PDXYYZ
Portland
Sat 10/10
7:29 pm-11:49 am
2 stops13h 20m
Toronto Pearson Intl
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$171
SeattleMontreal
SEA Seattle/Tacoma Intl - YUL Montreal Pierre Elliott Trudeau Intl
SEAYUL
Seattle/Tacoma Intl
Sun 11/1
8:25 am-11:22 pm
1 stop11h 57m
Montreal Pierre Elliott Trudeau Intl
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$171
Showing 1-10 of 60 resultsSorted by cheapest first
Best time to book a flight from Washington to Ontario
Have a flexible travel schedule? Discover the best time to fly to Ontario from Washington with our price prediction graph.
PDX-YYZ
SEA-YUL
SEA-YKF
SEA-YYZ
PDX-YUL
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 Washington to Ontario
USWA-CAON
PDX-YYZ
SEA-YUL
SEA-YKF
SEA-YYZ
What is the cheapest month to book a flight from State of Washington to Region of Ontario?
Currently, January is the cheapest month in which you can book a flight from State of Washington to Region of Ontario (average of $278). Flying from State of Washington to Region of Ontario in July is currently the most expensive (average of $588). 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 WA to ON?
Find hourly flight availability from Washington to Ontario. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 18, 2026.
When flying from State of Washington to Region of Ontario, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.
Weekly flight availability from State of Washington to Region of Ontario
Explore weekly flight availability from Washington to Ontario. 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 18, 2026.
The most flights from USWA to CAON are scheduled on a Monday (5 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (4 on average).
How much does it cost to fly round-trip from State of Washington to Region of Ontario?
Airfare is below average for this route at the moment.
State of Washington to Region of Ontario flights typically cost between $438 and $741 in October.The cheapest round-trip price found within the last 5 days was $345 on WestJet (Oct 15-Oct 19).
How far ahead should I book a flight from State of Washington to Region of Ontario?
Booking 59 days in advance of your planned departure date is, on average, the best time to get cheap flights from State of Washington to Region of Ontario. The general trend is that the closer you book to the departure date, the more expensive your flight will be.
Reviews of airlines servicing Ontario
Get insights into the airlines that provide service to Ontario. 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 Ontario. Reviews last updated September 18, 2026.
Peruse reviews from past customers who have flown with Alaska Airlines,Delta, andUnited Airlines from Washington to Ontario to help guide your decision. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Entertainment
7.0
Food
7.0
Boarding
8.1
Overall
7.9
Comfort
7.8
Crew
8.5
Reviews
1 / 20
2.0
MediocreChris,Aug 2026
GEG - SFO
Entertainment
7.0
Food
7.0
Boarding
8.1
Overall
7.9
Comfort
7.8
Crew
8.5
Reviews
1 / 20
2.0
MediocreChris,Aug 2026
GEG - SFO
Entertainment
7.0
Food
7.0
Boarding
8.1
Overall
7.9
Comfort
7.8
Crew
8.5
Reviews
1 / 20
2.0
MediocreChris,Aug 2026
GEG - SFO
Entertainment
7.0
Food
7.0
Boarding
8.1
Overall
7.9
Comfort
7.8
Crew
8.5
Reviews
1 / 20
2.0
MediocreChris,Aug 2026
GEG - SFO
Entertainment
7.0
Food
7.0
Boarding
8.1
Overall
7.9
Comfort
7.8
Crew
8.5
Reviews
1 / 20
2.0
MediocreChris,Aug 2026
GEG - SFO
Entertainment
7.0
Food
7.0
Boarding
8.1
Overall
7.9
Comfort
7.8
Crew
8.5
Reviews
1 / 20
2.0
MediocreChris,Aug 2026
GEG - SFO
Related info for your journey
Find useful and relevant information for your journey from Washington to Ontario. 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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Alternative routes for Washington to Ontario
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to Ontario by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Washington to Ontario by cabin class
Find flights from Washington to Ontario, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Washington and Ontario flights
Browse other Washington and Ontario flight options. Last updated on September 18, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Find a return flight route from Ontario
Find the right flight back to Washington after your stay in Ontario
Washington to Ontario flights
Consider these flights traveling from Washington to Ontario.
Top 5 airlines flying from Washington to Ontario
Discover the top 5 airlines that operate flights from Washington to Ontario. 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 18, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$132 | Average$393 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$132 | Average$519 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$228 | Average$394 | FlexibilityNo cancel fee | On-time60% | |
| Cheapest$250 | Average$481 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$277 | Average$546 | FlexibilityNo cancel fee | On-time69% |