$158+ Cheap flights from California to Ontario
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 7/1. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — YYZ
Jul 13 — Jul 201
Round-trip
1 adult, Economy
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Find cheap flights from California to Ontario with Cheapflights
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Cheapest flights from California to OntarioExplore the most affordable flight options available from California to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 13, 2026.
Explore the most affordable flight options available from California to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 13, 2026.
This Kiwi.com deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/2611:59 pm
LAX
- YTZ
1 stop14h 56m
Multiple Airlines
Tue 9/11:40 pm
YTZ
- LAX
1 stop13h 03m
Multiple Airlines
Deal found 6/11![Multiple Airlines logo]()
$336
This Kiwi.com deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/111:59 pm
LAX
- YTZ
1 stop11h 26m
Multiple Airlines
Tue 9/151:40 pm
YTZ
- LAX
2 stops22h 32m
Multiple Airlines
Deal found 6/9![Multiple Airlines logo]()
$344
This Vliegwinkel deal was found by Cheapflights users on 6/13. 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 Vliegwinkel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/66:05 pm
SFO
- YYZ
1 stop9h 50m
WestJet
Thu 8/1310:50 am
YYZ
- SFO
1 stop8h 50m
WestJet
Deal found 6/13![WestJet logo]()
$352
This Kiwi.com deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/246:05 pm
SFO
- YYZ
1 stop8h 40m
WestJet
Thu 8/276:00 am
YYZ
- SFO
1 stop9h 00m
WestJet
Deal found 6/12![WestJet logo]()
$354
This Kiwi.com deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/151:20 pm
SFO
- YYZ
Nonstop5h 05m
Multiple Airlines
Thu 7/2312:00 pm
YYZ
- SFO
2 stops12h 55m
Multiple Airlines
Deal found 6/9![Multiple Airlines logo]()
$356
This Kiwi.com deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/56:00 am
SFO
- YYZ
2 stops10h 00m
WestJet
Wed 8/193:50 pm
YYZ
- SFO
1 stop9h 05m
WestJet
Deal found 6/11![WestJet logo]()
$357
This Kiwi.com deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/196:00 am
SFO
- YYZ
2 stops12h 10m
WestJet
Thu 7/239:00 am
YYZ
- SFO
1 stop10h 40m
WestJet
Deal found 6/10![WestJet logo]()
$358
This Kiwi.com deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/236:00 am
SFO
- YYZ
2 stops10h 55m
WestJet
Thu 8/273:50 pm
YYZ
- SFO
1 stop9h 05m
WestJet
Deal found 6/11![WestJet logo]()
$359
This Kiwi.com deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/18:15 pm
LAX
- YYZ
1 stop7h 24m
Multiple Airlines
Tue 9/157:00 am
YYZ
- LAX
2 stops11h 52m
Multiple Airlines
Deal found 6/12![Multiple Airlines logo]()
$359
This Kiwi.com deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/83:03 pm
SAN
- YYZ
2 stops31h 02m
Multiple Airlines
Tue 7/147:00 am
YYZ
- SAN
1 stop10h 08m
Multiple Airlines
Deal found 6/12![Multiple Airlines logo]()
$360
This Kiwi.com deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/146:00 am
SFO
- YYZ
2 stops10h 55m
WestJet
Fri 7/246:00 am
YYZ
- SFO
1 stop9h 00m
WestJet
Deal found 6/10![WestJet logo]()
$360
This Kiwi.com deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/141:20 pm
SFO
- YYZ
Nonstop5h 05m
Multiple Airlines
Fri 7/249:00 am
YYZ
- SFO
1 stop10h 40m
Multiple Airlines
Deal found 6/10![Multiple Airlines logo]()
$361
Best flights from California to OntarioDiscover carefully curated flight deals from California to Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated June 13, 2026.
Discover carefully curated flight deals from California to Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated June 13, 2026.
This Trip.com deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/226:00 am
SFO
- YKF
1 stop10h 50m
WestJet
Sat 8/298:40 pm
YKF
- SFO
1 stop18h 20m
WestJet
Deal found 6/10![WestJet logo]()
$412
This United Airlines deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/308:10 am
SFO
- YYZ
Nonstop5h 00m
United Airlines
Tue 7/146:30 am
YYZ
- SFO
Nonstop5h 39m
United Airlines
Deal found 6/11![United Airlines logo]()
$439
This Delta deal was found by Cheapflights users on 6/13. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/310:00 pm
SFO
- YYZ
1 stop11h 23m
Delta
Mon 9/76:00 am
YYZ
- SFO
1 stop12h 51m
Delta
Deal found 6/13![Delta logo]()
$475
This United deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/610:35 pm
LAX
- YYZ
1 stop8h 19m
Multiple Airlines
Wed 7/156:35 pm
YYZ
- LAX
Nonstop5h 18m
Multiple Airlines
Deal found 6/12![Multiple Airlines logo]()
$500
This Sun Country Air deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Sun Country Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/2711:59 pm
SFO
- YYZ
1 stop13h 51m
Sun Country Air
Thu 7/211:41 am
YYZ
- SFO
1 stop23h 30m
Sun Country Air
Deal found 6/9![Sun Country Air logo]()
$566
This Justfly.com deal was found by Cheapflights users on 6/13. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/66:05 pm
SFO
- YKF
1 stop22h 45m
WestJet
Tue 7/218:40 pm
YKF
- SFO
1 stop28h 15m
WestJet
Deal found 6/13![WestJet logo]()
$457
This United Airlines deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/188:10 am
SFO
- YYZ
Nonstop5h 04m
United Airlines
Mon 9/286:30 am
YYZ
- SFO
Nonstop5h 38m
United Airlines
Deal found 6/12![United Airlines logo]()
$460
This Delta deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/1310:55 pm
SFO
- YYZ
1 stop7h 00m
Delta
Thu 7/305:45 pm
YYZ
- SFO
1 stop9h 07m
Delta
Deal found 6/10![Delta logo]()
$486
This United Airlines deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/512:35 am
SFO
- YYZ
1 stop10h 07m
United Airlines
Sun 9/64:18 pm
YYZ
- SFO
1 stop9h 37m
United Airlines
Deal found 6/11![United Airlines logo]()
$461
This oojo deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/246:05 pm
SFO
- YKF
1 stop22h 45m
WestJet
Wed 8/268:40 pm
YKF
- SFO
1 stop23h 00m
WestJet
Deal found 6/11![WestJet logo]()
$463
This United deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/216:38 pm
SFO
- YTZ
1 stop12h 29m
Multiple Airlines
Mon 8/2412:30 pm
YTZ
- SFO
1 stop11h 21m
Multiple Airlines
Deal found 6/11![Multiple Airlines logo]()
$523
This Delta deal was found by Cheapflights users on 6/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/1512:59 pm
SAN
- YYZ
1 stop7h 59m
Delta
Fri 7/1711:40 am
YYZ
- SAN
1 stop10h 55m
Delta
Deal found 6/8![Delta logo]()
$509
This Booking.com deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/216:00 am
SFO
- YKF
1 stop10h 50m
WestJet
Mon 8/248:40 pm
YKF
- SFO
1 stop28h 15m
WestJet
Deal found 6/11![WestJet logo]()
$467
This United deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/611:38 pm
SFO
- YUL
Nonstop5h 38m
Multiple Airlines
Thu 8/138:10 am
YUL
- SFO
Nonstop6h 11m
Multiple Airlines
Deal found 6/12![Multiple Airlines logo]()
$535
This United Airlines deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/2410:35 pm
SFO
- YYZ
1 stop9h 34m
United Airlines
Sat 8/156:30 am
YYZ
- SFO
Nonstop5h 38m
United Airlines
Deal found 6/11![United Airlines logo]()
$502
This Delta deal was found by Cheapflights users on 6/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/236:15 am
SAN
- YYZ
1 stop12h 46m
Delta
Tue 7/286:10 am
YYZ
- SAN
1 stop7h 17m
Delta
Deal found 6/8![Delta logo]()
$509
This FlightHub deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/46:00 am
SFO
- YKF
1 stop10h 50m
WestJet
Wed 8/128:40 pm
YKF
- SFO
1 stop28h 15m
WestJet
Deal found 6/10![WestJet logo]()
$468
This United deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/610:38 pm
SFO
- YUL
1 stop9h 02m
Multiple Airlines
Fri 7/108:10 am
YUL
- SFO
Nonstop6h 11m
Multiple Airlines
Deal found 6/12![Multiple Airlines logo]()
$539
This United Airlines deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/166:00 am
LAX
- YYZ
1 stop7h 10m
United Airlines
Tue 7/215:15 pm
YYZ
- LAX
1 stop8h 40m
United Airlines
Deal found 6/10![United Airlines logo]()
$503
This Delta deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/258:10 am
LAX
- YYZ
1 stop12h 48m
Delta
Wed 7/89:45 am
YYZ
- LAX
1 stop10h 48m
Delta
Deal found 6/10![Delta logo]()
$515
This FlightHub deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/124:55 pm
LAX
- YKF
2 stops23h 55m
WestJet
Sun 8/168:40 pm
YKF
- LAX
1 stop28h 25m
WestJet
Deal found 6/9![WestJet logo]()
$475
This Mytrip deal was found by Cheapflights users on 6/13. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/136:05 pm
SFO
- YKF
1 stop22h 45m
Multiple Airlines
Wed 7/156:10 am
YKF
- SFO
2 stops14h 50m
Multiple Airlines
Deal found 6/13![Multiple Airlines logo]()
$553
This United Airlines deal was found by Cheapflights users on 6/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/94:30 pm
LAX
- YYZ
Nonstop4h 43m
United Airlines
Sat 7/116:10 am
YYZ
- LAX
1 stop10h 56m
United Airlines
Deal found 6/8![United Airlines logo]()
$506
This Delta deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/271:18 pm
LAX
- YYZ
1 stop7h 40m
Delta
Wed 7/89:45 am
YYZ
- LAX
1 stop10h 48m
Delta
Deal found 6/10![Delta logo]()
$515
This oojo deal was found by Cheapflights users on 6/13. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/46:00 am
SFO
- YKF
1 stop10h 50m
WestJet
Thu 8/138:40 pm
YKF
- SFO
1 stop18h 20m
WestJet
Deal found 6/13![WestJet logo]()
$479
This Kiwi.com deal was found by Cheapflights users on 6/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/153:03 pm
SAN
- YYZ
2 stops12h 52m
Multiple Airlines
Fri 7/177:00 am
YYZ
- SAN
1 stop10h 10m
Multiple Airlines
Deal found 6/8![Multiple Airlines logo]()
$555
This United Airlines deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/612:13 am
LAX
- YTZ
1 stop6h 53m
United Airlines
Tue 7/1412:15 pm
YTZ
- LAX
1 stop10h 01m
United Airlines
Deal found 6/9![United Airlines logo]()
$507
This Delta deal was found by Cheapflights users on 6/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/46:25 am
LAX
- YYZ
1 stop9h 09m
Delta
Fri 8/145:50 pm
YYZ
- LAX
1 stop8h 55m
Delta
Deal found 6/8![Delta logo]()
$519
This oojo deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/61:00 pm
SFO
- YKF
1 stop27h 50m
WestJet
Mon 8/108:40 pm
YKF
- SFO
1 stop18h 20m
WestJet
Deal found 6/10![WestJet logo]()
$479
This United Airlines deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/3111:30 pm
LAX
- YTZ
1 stop7h 36m
United Airlines
Fri 8/73:15 pm
YTZ
- LAX
1 stop10h 40m
United Airlines
Deal found 6/9![United Airlines logo]()
$507
Last-minute flights from California to OntarioDiscover last-minute flight deals from California to Ontario. Data last updated June 13, 2026 and is based on user searches.
Discover last-minute flight deals from California to Ontario. Data last updated June 13, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/83:03 pm
SAN
- YYZ
2 stops31h 02m
Multiple Airlines
Tue 7/147:00 am
YYZ
- SAN
1 stop10h 08m
Multiple Airlines
Deal found 6/12![Multiple Airlines logo]()
$360
This Kiwi.com deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/86:30 am
LAX
- YYZ
1 stop21h 09m
Multiple Airlines
Wed 7/227:00 am
YYZ
- LAX
2 stops16h 03m
Multiple Airlines
Deal found 6/12![Multiple Airlines logo]()
$362
This Kiwi.com deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/83:03 pm
SAN
- YYZ
1 stop12h 36m
Multiple Airlines
Mon 7/139:00 am
YYZ
- SAN
2 stops32h 08m
Multiple Airlines
Deal found 6/12![Multiple Airlines logo]()
$365
This Kiwi.com deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/131:20 pm
SFO
- YYZ
Nonstop5h 05m
Multiple Airlines
Wed 7/2212:40 pm
YYZ
- SFO
2 stops12h 15m
Multiple Airlines
Deal found 6/9![Multiple Airlines logo]()
$359
This Kiwi.com deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/136:00 am
SFO
- YYZ
2 stops10h 55m
WestJet
Wed 7/222:50 pm
YYZ
- SFO
1 stop10h 05m
WestJet
Deal found 6/10![WestJet logo]()
$364
This Kiwi.com deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/146:00 am
SFO
- YYZ
2 stops10h 55m
WestJet
Fri 7/246:00 am
YYZ
- SFO
1 stop9h 00m
WestJet
Deal found 6/10![WestJet logo]()
$360
This Kiwi.com deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/141:20 pm
SFO
- YYZ
Nonstop5h 05m
Multiple Airlines
Fri 7/249:00 am
YYZ
- SFO
1 stop10h 40m
Multiple Airlines
Deal found 6/10![Multiple Airlines logo]()
$361
This Kiwi.com deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/146:00 am
SFO
- YYZ
2 stops10h 55m
WestJet
Wed 7/222:50 pm
YYZ
- SFO
1 stop10h 05m
WestJet
Deal found 6/9![WestJet logo]()
$362
This Kiwi.com deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/151:20 pm
SFO
- YYZ
Nonstop5h 05m
Multiple Airlines
Thu 7/2312:00 pm
YYZ
- SFO
2 stops12h 55m
Multiple Airlines
Deal found 6/9![Multiple Airlines logo]()
$356
This Kiwi.com deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/151:20 pm
SFO
- YYZ
Nonstop5h 05m
Multiple Airlines
Fri 7/248:00 am
YYZ
- SFO
2 stops11h 40m
Multiple Airlines
Deal found 6/9![Multiple Airlines logo]()
$357
This Kiwi.com deal was found by Cheapflights users on 6/13. 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.
Wed 7/156:05 pm
SFO
- YYZ
1 stop9h 50m
WestJet
Wed 7/2212:40 pm
YYZ
- SFO
2 stops12h 15m
WestJet
Deal found 6/13![WestJet logo]()
$363
This Kiwi.com deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/196:00 am
SFO
- YYZ
2 stops12h 10m
WestJet
Thu 7/239:00 am
YYZ
- SFO
1 stop10h 40m
WestJet
Deal found 6/10![WestJet logo]()
$358
One-way flights from California to OntarioSearch for one-way flight options from California to Ontario. Find affordable one-way fares based on user searches. Data last updated June 13, 2026.
Search for one-way flight options from California to Ontario. Find affordable one-way fares based on user searches. Data last updated June 13, 2026.
This Kiwi.com deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/13:34 pm
ONT
- YYZ
3 stops34h 36m
Multiple Airlines
Deal found 6/9![Multiple Airlines logo]()
$158
This Kiwi.com deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/293:40 pm
ONT
- YYZ
3 stops34h 30m
Multiple Airlines
Deal found 6/9![Multiple Airlines logo]()
$160
This Kiwi.com deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/153:03 pm
SAN
- YYZ
2 stops12h 52m
Multiple Airlines
Deal found 6/12![Multiple Airlines logo]()
$160
This Kiwi.com deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/19:46 am
SAN
- YYZ
2 stops31h 19m
Multiple Airlines
Deal found 6/11![Multiple Airlines logo]()
$161
This Kiwi.com deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/143:03 pm
SAN
- YYZ
2 stops35h 07m
Multiple Airlines
Deal found 6/12![Multiple Airlines logo]()
$163
This Kiwi.com deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/283:40 pm
ONT
- YYZ
2 stops30h 25m
Multiple Airlines
Deal found 6/9![Multiple Airlines logo]()
$168
This Kiwi.com deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/259:53 pm
SAN
- YYZ
3 stops28h 17m
Multiple Airlines
Deal found 6/10![Multiple Airlines logo]()
$170
This Trip.com deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/83:40 pm
ONT
- YYZ
1 stop11h 59m
Multiple Airlines
Deal found 6/10![Multiple Airlines logo]()
$172
This Kiwi.com deal was found by Cheapflights users on 6/13. 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.
Wed 7/151:38 pm
ONT
- YYZ
2 stops12h 32m
Multiple Airlines
Deal found 6/13![Multiple Airlines logo]()
$175
This Trip.com deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/301:33 pm
ONT
- YYZ
2 stops14h 22m
Multiple Airlines
Deal found 6/11![Multiple Airlines logo]()
$177
This Kiwi.com deal was found by Cheapflights users on 6/13. 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.
Tue 7/283:03 pm
SAN
- YYZ
3 stops35h 07m
Multiple Airlines
Deal found 6/13![Multiple Airlines logo]()
$177
This Kiwi.com deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/113:03 pm
SAN
- YYZ
2 stops31h 02m
Multiple Airlines
Deal found 6/11![Multiple Airlines logo]()
$178
Find flight deals from California to Ontario
Keep the following information in mind while searching for California to Ontario flight deals. Data was last updated June 13, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $336 (Kiwi.com) |
One-way from | $158 (Kiwi.com) |
Popular in | June |
Cheapest in | September |
Average price | $504 |
Good round-trip deal | $525 or less |
Good one-way deal | $273 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from California 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 2,558,603 searches. Data last updated June 13, 2026.
Use the filters below to find and compare flights from California to Ontario that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
San FranciscoToronto
SFO - YKF
SFOYKF
San Francisco
Sat 8/22
6:00 am-7:50 pm
1 stop10h 50m
Toronto Region of Waterloo Intl
Sat 8/29
8:40 pm-12:00 pm
1 stop18h 20m
$412
Quickest round-trip
San FranciscoToronto
SFO - YYZ
SFOYYZ
San Francisco
Tue 6/30
8:10 am-4:10 pm
Nonstop5h 00m
Toronto Pearson Intl
Tue 7/14
6:30 am-9:09 am
Nonstop5h 39m
$439
San FranciscoToronto
SFO - YKF
SFOYKF
San Francisco
Mon 7/6
6:05 pm-7:50 pm
1 stop22h 45m
Toronto Region of Waterloo Intl
Tue 7/21
8:40 pm-9:55 pm
1 stop28h 15m
$457
San FranciscoToronto
SFO - YYZ
SFOYYZ
San Francisco
Fri 9/18
8:10 am-4:14 pm
Nonstop5h 04m
Toronto Pearson Intl
Mon 9/28
6:30 am-9:08 am
Nonstop5h 38m
$460
San FranciscoToronto
SFO - YYZ
SFOYYZ
San Francisco
Sat 9/5
12:35 am-1:42 pm
1 stop10h 07m
Toronto Pearson Intl
Sun 9/6
4:18 pm-10:55 pm
1 stop9h 37m
$461
San FranciscoToronto
SFO - YKF
SFOYKF
San Francisco
Mon 8/24
6:05 pm-7:50 pm
1 stop22h 45m
Toronto Region of Waterloo Intl
Wed 8/26
8:40 pm-4:40 pm
1 stop23h 00m
$463
San FranciscoToronto
SFO - YKF
SFOYKF
San Francisco
Fri 8/21
6:00 am-7:50 pm
1 stop10h 50m
Toronto Region of Waterloo Intl
Mon 8/24
8:40 pm-9:55 pm
1 stop28h 15m
$467
San FranciscoToronto
SFO - YKF
SFOYKF
San Francisco
Tue 8/4
6:00 am-7:50 pm
1 stop10h 50m
Toronto Region of Waterloo Intl
Wed 8/12
8:40 pm-9:55 pm
1 stop28h 15m
$468
San FranciscoToronto
SFO - YYZ
SFOYYZ
San Francisco
Thu 9/3
10:00 pm-12:23 pm
1 stop11h 23m
Toronto Pearson Intl
Mon 9/7
6:00 am-3:51 pm
1 stop12h 51m
$475
Los AngelesToronto
LAX - YKF
LAXYKF
Los Angeles
Wed 8/12
4:55 pm-7:50 pm
2 stops23h 55m
Toronto Region of Waterloo Intl
Sun 8/16
8:40 pm-10:05 pm
1 stop28h 25m
$475
Showing 1-10 of 60 resultsSorted by cheapest first
Best time to book a flight from California to Ontario
Have a flexible travel schedule? Discover the best time to fly to Ontario from California with our price prediction graph.
LAX-YTZ
SFO-YYZ
LAX-YYZ
SAN-YYZ
LAX-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 California to Ontario
USCA-CAON
LAX-YTZ
SFO-YYZ
LAX-YYZ
SAN-YYZ
What is the cheapest month to book a flight from California to Region of Ontario?
Currently, September is the cheapest month in which you can book a flight from California to Region of Ontario (average of $359). Flying from California to Region of Ontario in December is currently the most expensive (average of $706). 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 CA to ON?
Find hourly flight availability from California 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 June 13, 2026.
A simple way to save on the total cost of your ticket is to fly from California to Region of Ontario at noon. If you’re flexible enough to do this you can expect to save up to 33% on your trip compared to booking a flight in the evening.
How much does it cost to fly round-trip from California to Region of Ontario?
How far ahead should I book a flight from California to Region of Ontario?
The best time to book flights from California to Region of Ontario is 45 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.
What is the cheapest day to fly from California to Region of Ontario?
Use this chart to determine the cheapest time to fly round-trip from California to Ontario. Price data was last updated on June 13, 2026.
Travelers seeking maximum savings on their California to Region of Ontario flight should consider departing on Sunday evenings when fares are most often at their lowest. Sunday mornings flights should be avoided if possible as fares are typically the most expensive at this time.
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 June 13, 2026.
Get a feel of what it's like to fly with Porter Airlines,Delta, andUnited Airlines from California to Ontario by reading reviews from past customers. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Overall
8.0
Boarding
8.2
Crew
8.6
Comfort
8.0
Food
7.6
Entertainment
6.9
Reviews
1 / 20
6.0
GoodJustin,May 2026
YYZ - MCO
Overall
8.0
Boarding
8.2
Crew
8.6
Comfort
8.0
Food
7.6
Entertainment
6.9
Reviews
1 / 20
6.0
GoodJustin,May 2026
YYZ - MCO
Overall
8.0
Boarding
8.2
Crew
8.6
Comfort
8.0
Food
7.6
Entertainment
6.9
Reviews
1 / 20
6.0
GoodJustin,May 2026
YYZ - MCO
Overall
8.0
Boarding
8.2
Crew
8.6
Comfort
8.0
Food
7.6
Entertainment
6.9
Reviews
1 / 20
6.0
GoodJustin,May 2026
YYZ - MCO
Overall
8.0
Boarding
8.2
Crew
8.6
Comfort
8.0
Food
7.6
Entertainment
6.9
Reviews
1 / 20
6.0
GoodJustin,May 2026
YYZ - MCO
Overall
8.0
Boarding
8.2
Crew
8.6
Comfort
8.0
Food
7.6
Entertainment
6.9
Reviews
1 / 20
6.0
GoodJustin,May 2026
YYZ - MCO
Related info for your journey
Find useful and relevant information for your journey from California to Ontario. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Browse thousands of different options on Cheapflights for your next trip
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Alternative routes for California 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 California to Ontario by cabin class
Find flights from California to Ontario, based on your preferred cabin class, be it economy, premium economy, business, or first class.
California and Ontario flights
Browse other California and Ontario flight options. Last updated on June 13, 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 California after your stay in Ontario
California to Ontario flights
Consider these flights traveling from California to Ontario.
Top 8 airlines flying from California to Ontario
Discover the top 8 airlines that operate flights from California 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 2,558,603 searches. Data last updated June 13, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$110 | Average$457 | FlexibilityNo cancel fee | On-time60% | |
| Cheapest$114 | Average$419 | FlexibilityNo cancel fee | On-time50% | |
| Cheapest$123 | Average$412 | FlexibilityNo cancel fee | On-time52% | |
| Cheapest$136 | Average$467 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$153 | Average$654 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$159 | Average$625 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$293 | Average$430 | FlexibilityNo cancel fee | On-time68% | |
| Cheapest$325 | Average$610 | FlexibilityNo cancel fee | On-time71% |