$136+ Cheap flights from California 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 10/1. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — YYZ
Oct 12 — Oct 191
Round-trip
1 adult, Economy
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Find cheap flights from California to Ontario 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
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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 September 12, 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 September 12, 2026.
This Kiwi.com deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/36:10 pm -
1 stop9h 45m
Mon 10/512:40 pm -
1 stop8h 50m
Deal found 9/8![WestJet logo]()
$279
This Jettzy deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Jettzy is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/1611:20 pm -
Nonstop4h 19m
Mon 10/199:00 am -
1 stop9h 30m
Deal found 9/10![Multiple Airlines logo]()
$280
This Trip.com deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/238:30 am -
2 stops11h 55m
Fri 10/309:10 am -
2 stops13h 05m
Deal found 9/8![WestJet logo]()
$281
This FlightHub deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/117:45 am -
2 stops12h 55m
Tue 11/2410:20 pm -
1 stop15h 50m
Deal found 9/8![WestJet logo]()
$282
This Kiwi.com deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/91:20 pm -
1 stop8h 45m
Sun 10/118:00 am -
2 stops12h 15m
Deal found 9/8![WestJet logo]()
$283
This Trip.com deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/3112:50 pm -
2 stops14h 55m
Fri 11/62:05 pm -
1 stop9h 00m
Deal found 9/8![Multiple Airlines logo]()
$286
This Trip.com deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/166:10 pm -
1 stop8h 35m
Mon 10/1910:50 am -
1 stop9h 25m
Deal found 9/8![WestJet logo]()
$287
This MakeMyTrip deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure MakeMyTrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/2311:20 pm -
Nonstop4h 19m
Fri 10/308:40 pm -
Nonstop5h 07m
Deal found 9/8![Multiple Airlines logo]()
$288
This lastminute.com deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure lastminute.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/224:35 pm -
1 stop9h 35m
Wed 10/289:10 am -
2 stops13h 05m
Deal found 9/9![WestJet logo]()
$289
This Kiwi.com deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/57:20 pm -
1 stop11h 25m
Thu 10/812:00 pm -
1 stop10h 55m
Deal found 9/9![WestJet logo]()
$290
This Kiwi.com deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/145:15 pm -
1 stop10h 35m
Mon 11/168:30 pm -
1 stop15h 49m
Deal found 9/8![Multiple Airlines logo]()
$298
This Kiwi.com deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/2810:05 am -
2 stops11h 50m
Thu 11/58:30 pm -
1 stop14h 18m
Deal found 9/10![Multiple Airlines logo]()
$316
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 September 12, 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 September 12, 2026.
This Kiwi.com deal was found by Cheapflights users on 9/6. Clicking the “Pick Dates” 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 10/108:30 am -
1 stop9h 45m
Tue 10/1310:50 am -
1 stop9h 25m
Deal found 9/6![WestJet logo]()
$309
This FlightHub deal was found by Cheapflights users on 9/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/252:35 pm -
Nonstop4h 15m
Sun 11/2910:50 pm -
1 stop21h 45m
Deal found 9/6![Multiple Airlines logo]()
$315
This United Airlines deal was found by Cheapflights users on 9/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/267:00 am -
1 stop7h 56m
Tue 9/295:15 pm -
1 stop7h 58m
Deal found 9/7![United Airlines logo]()
$383
This Porter Airlines deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Porter Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/121:35 pm -
Nonstop4h 43m
Mon 11/169:55 am -
Nonstop5h 39m
Deal found 9/8![Porter Airlines logo]()
$441
This Delta deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/2811:45 am -
1 stop8h 44m
Mon 11/26:28 pm -
1 stop9h 47m
Deal found 9/8![Delta logo]()
$464
This Alaska Airlines deal was found by Cheapflights users on 9/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/1711:53 am -
2 stops25h 12m
Fri 11/205:15 pm -
1 stop8h 31m
Deal found 9/7![Alaska Airlines logo]()
$485
This Air Canada deal was found by Cheapflights users on 9/6. Clicking the “Pick Dates” 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 12/512:55 pm -
Nonstop5h 00m
Mon 12/149:20 am -
Nonstop5h 40m
Deal found 9/6![Air Canada logo]()
$493
This FlightHub deal was found by Cheapflights users on 9/6. Clicking the “Pick Dates” 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 10/34:40 pm -
Nonstop4h 19m
Wed 10/1410:30 pm -
1 stop24h 25m
Deal found 9/6![Multiple Airlines logo]()
$342
This oojo deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/38:30 am -
2 stops23h 45m
Thu 10/89:00 am -
2 stops13h 55m
Deal found 9/9![WestJet logo]()
$350
This United Airlines deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/1311:43 pm -
1 stop7h 11m
Sat 10/179:44 am -
1 stop13h 24m
Deal found 9/11![United Airlines logo]()
$383
This Justfly.com deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/57:20 pm -
1 stop12h 55m
Mon 10/126:10 am -
2 stops12h 20m
Deal found 9/8![WestJet logo]()
$358
This United deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/86:00 am -
1 stop6h 46m
Tue 10/138:35 pm -
Nonstop4h 47m
Deal found 9/8![Multiple Airlines logo]()
$367
This United Airlines deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/267:00 am -
1 stop8h 28m
Thu 10/15:15 pm -
1 stop7h 58m
Deal found 9/11![United Airlines logo]()
$383
This FlightHub deal was found by Cheapflights users on 9/6. Clicking the “Pick Dates” 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 10/38:30 am -
2 stops22h 15m
Wed 10/144:15 pm -
1 stop30h 40m
Deal found 9/6![WestJet logo]()
$374
This Delta deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/1210:05 pm -
1 stop10h 14m
Mon 10/196:10 pm -
1 stop7h 24m
Deal found 9/8![Delta logo]()
$466
This Alaska Airlines deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/186:59 pm -
2 stops18h 06m
Sun 11/225:15 pm -
2 stops18h 46m
Deal found 9/8![Alaska Airlines logo]()
$490
This KAYAK deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/138:15 am -
1 stop8h 35m
Thu 10/1512:30 pm -
1 stop10h 24m
Deal found 9/11![Air Canada logo]()
$501
This Porter Airlines deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Porter Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/261:45 pm -
Nonstop4h 54m
Mon 11/29:50 am -
Nonstop5h 55m
Deal found 9/11![Porter Airlines logo]()
$509
This Delta deal was found by Cheapflights users on 9/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/110:40 pm -
1 stop7h 15m
Sat 12/56:00 am -
1 stop7h 46m
Deal found 9/7![Delta logo]()
$486
This Mytrip deal was found by Cheapflights users on 9/6. Clicking the “Pick Dates” 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 10/31:15 pm -
3 stops25h 20m
Wed 10/76:05 am -
3 stops19h 00m
Deal found 9/6![Multiple Airlines logo]()
$448
This Alaska Airlines deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/263:31 pm -
2 stops21h 34m
Tue 11/35:15 pm -
2 stops18h 45m
Deal found 9/11![Alaska Airlines logo]()
$494
This Alaska Airlines deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/3111:00 am -
1 stop27h 05m
Tue 11/35:15 pm -
2 stops25h 25m
Deal found 9/8![Alaska Airlines logo]()
$496
This Delta deal was found by Cheapflights users on 9/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/1211:53 am -
1 stop8h 04m
Mon 11/166:10 pm -
1 stop7h 24m
Deal found 9/7![Delta logo]()
$497
This United Airlines deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/2010:55 am -
1 stop7h 37m
Thu 10/227:00 am -
1 stop9h 06m
Deal found 9/11![United Airlines logo]()
$497
This Porter Airlines deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Porter Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/291:35 pm -
1 stop8h 00m
Fri 11/135:55 pm -
2 stops21h 39m
Deal found 9/11![Porter Airlines logo]()
$574
This Mytrip deal was found by Cheapflights users on 9/6. Clicking the “Pick Dates” 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 10/266:00 pm -
3 stops25h 05m
Fri 10/306:05 am -
3 stops19h 15m
Deal found 9/6![Multiple Airlines logo]()
$480
This Alaska Airlines deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/243:37 pm -
2 stops21h 28m
Tue 11/35:15 pm -
2 stops18h 59m
Deal found 9/10![Alaska Airlines logo]()
$512
This Porter Airlines deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Porter Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/202:15 pm -
1 stop7h 22m
Mon 10/266:45 am -
1 stop8h 49m
Deal found 9/9![Porter Airlines logo]()
$577
This Air Canada deal was found by Cheapflights users on 9/6. Clicking the “Pick Dates” 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.
Wed 10/287:15 am -
1 stop9h 20m
Tue 11/36:15 pm -
Nonstop6h 24m
Deal found 9/6![Air Canada logo]()
$638
This Mytrip deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/257:15 am -
1 stop9h 22m
Sat 10/316:05 am -
2 stops14h 50m
Deal found 9/9![Multiple Airlines logo]()
$486
Last-minute flights from California to OntarioDiscover last-minute flight deals from California to Ontario. Data last updated September 12, 2026 and is based on user searches.
Discover last-minute flight deals from California to Ontario. Data last updated September 12, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/110:04 pm -
3 stops20h 31m
Sat 10/319:55 am -
Nonstop5h 39m
Deal found 9/10![Multiple Airlines logo]()
$318
This Kiwi.com deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/36:10 pm -
1 stop9h 45m
Mon 10/512:40 pm -
1 stop8h 50m
Deal found 9/8![WestJet logo]()
$279
This Kiwi.com deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/57:20 pm -
1 stop11h 25m
Thu 10/812:00 pm -
1 stop10h 55m
Deal found 9/9![WestJet logo]()
$290
This Kiwi.com deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/91:20 pm -
1 stop8h 45m
Sun 10/118:00 am -
2 stops12h 15m
Deal found 9/8![WestJet logo]()
$283
This Jettzy deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Jettzy is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/1611:20 pm -
Nonstop4h 19m
Mon 10/199:00 am -
1 stop9h 30m
Deal found 9/10![Multiple Airlines logo]()
$280
This Trip.com deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/166:10 pm -
1 stop8h 35m
Mon 10/1910:50 am -
1 stop9h 25m
Deal found 9/8![WestJet logo]()
$287
This Air Canada deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/1611:30 pm -
Nonstop4h 19m
Mon 10/198:35 pm -
Nonstop4h 47m
Deal found 9/8![Air Canada logo]()
$291
This lastminute.com deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure lastminute.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/224:35 pm -
1 stop9h 35m
Wed 10/289:10 am -
2 stops13h 05m
Deal found 9/9![WestJet logo]()
$289
This Trip.com deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/238:30 am -
2 stops11h 55m
Fri 10/309:10 am -
2 stops13h 05m
Deal found 9/8![WestJet logo]()
$281
This MakeMyTrip deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure MakeMyTrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/2311:20 pm -
Nonstop4h 19m
Fri 10/308:40 pm -
Nonstop5h 07m
Deal found 9/8![Multiple Airlines logo]()
$288
This Kiwi.com deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/2810:05 am -
2 stops11h 50m
Thu 11/58:30 pm -
1 stop14h 18m
Deal found 9/10![Multiple Airlines logo]()
$316
This Trip.com deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/3112:50 pm -
2 stops14h 55m
Fri 11/62:05 pm -
1 stop9h 00m
Deal found 9/8![Multiple Airlines logo]()
$286
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 September 12, 2026.
Search for one-way flight options from California to Ontario. Find affordable one-way fares based on user searches. Data last updated September 12, 2026.
This Trip.com deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/18:24 pm -
3 stops24h 01m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/11![Multiple Airlines logo]()
$136
This Kiwi.com deal was found by Cheapflights users on 9/6. Clicking the “Pick Dates” 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 10/197:20 pm -
1 stop12h 55m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/6![WestJet logo]()
$143
This FlightHub deal was found by Cheapflights users on 9/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/221:45 pm -
2 stops12h 25m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/7![WestJet logo]()
$144
This SmartFares deal was found by Cheapflights users on 9/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/251:20 pm -
1 stop8h 45m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/6![WestJet logo]()
$145
This Cheapflightsfares deal was found by Cheapflights users on 9/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/181:20 pm -
1 stop8h 45m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/6![WestJet logo]()
$146
This SmartFares deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/111:20 pm -
Nonstop4h 19m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/11![Air Transat logo]()
$147
This Air Canada deal was found by Cheapflights users on 9/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/611:30 pm -
Nonstop4h 19m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/7![Air Canada logo]()
$148
This Air Canada deal was found by Cheapflights users on 9/6. Clicking the “Pick Dates” 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.
Mon 10/1911:30 pm -
Nonstop4h 19m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/6![Air Canada logo]()
$150
This FlightHub deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/248:30 am -
2 stops21h 05m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/11![WestJet logo]()
$152
This Super.com deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/1511:20 pm -
Nonstop4h 19m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/8![Air Transat logo]()
$153
This deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/104:40 pm -
Nonstop4h 19m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/8![Porter Airlines logo]()
$154
This Kiwi.com deal was found by Cheapflights users on 9/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/151:00 pm -
2 stops13h 10m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/12![WestJet logo]()
$156
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 September 12, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $277 (Kiwi.com) |
One-way from | $136 (Trip.com) |
Popular in | July |
Cheapest in | January |
Average price | $441 |
Good round-trip deal | $444 or less |
Good one-way deal | $233 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 7,457,451 searches. Data last updated September 12, 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
Las VegasToronto
LAS Las Vegas Harry Reid Intl - YYZ Toronto Pearson Intl
LASYYZ
Las Vegas Harry Reid Intl
Fri 10/16
12:59 am-11:59 am
1 stop8h 00m
Toronto Pearson Intl
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$155
Las VegasToronto
LAS Las Vegas Harry Reid Intl - YYZ Toronto Pearson Intl
LASYYZ
Las Vegas Harry Reid Intl
Tue 10/6
7:45 am-10:23 pm
2 stops11h 38m
Toronto Pearson Intl
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$160
Las VegasToronto
LAS Las Vegas Harry Reid Intl - YYZ Toronto Pearson Intl
LASYYZ
Las Vegas Harry Reid Intl
Fri 9/25
11:59 pm-11:43 am
1 stop8h 44m
Toronto Pearson Intl
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$162
Las VegasToronto
LAS Las Vegas Harry Reid Intl - YYZ Toronto Pearson Intl
LASYYZ
Las Vegas Harry Reid Intl
Wed 9/23
12:40 am-11:35 am
1 stop7h 55m
Toronto Pearson Intl
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$162
Las VegasToronto
LAS Las Vegas Harry Reid Intl - YYZ Toronto Pearson Intl
LASYYZ
Las Vegas Harry Reid Intl
Wed 11/4
2:34 pm-11:59 pm
1 stop6h 25m
Toronto Pearson Intl
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$162
Las VegasToronto
LAS Las Vegas Harry Reid Intl - YYZ Toronto Pearson Intl
LASYYZ
Las Vegas Harry Reid Intl
Sun 9/27
6:00 am-9:32 pm
2 stops12h 32m
Toronto Pearson Intl
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$168
Las VegasToronto
LAS Las Vegas Harry Reid Intl - YYZ Toronto Pearson Intl
LASYYZ
Las Vegas Harry Reid Intl
Wed 9/23
6:00 am-10:23 pm
2 stops13h 23m
Toronto Pearson Intl
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$168
Las VegasToronto
LAS Las Vegas Harry Reid Intl - YYZ Toronto Pearson Intl
LASYYZ
Las Vegas Harry Reid Intl
Mon 10/19
5:55 pm-9:54 am
2 stops12h 59m
Toronto Pearson Intl
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$171
Las VegasToronto
LAS Las Vegas Harry Reid Intl - YYZ Toronto Pearson Intl
LASYYZ
Las Vegas Harry Reid Intl
Thu 11/12
1:57 pm-8:32 am
2 stops15h 35m
Toronto Pearson Intl
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$177
Las VegasToronto
LAS Las Vegas Harry Reid Intl - YYZ Toronto Pearson Intl
LASYYZ
Las Vegas Harry Reid Intl
Thu 9/24
4:30 pm-11:25 pm
2 stops27h 55m
Toronto Pearson Intl
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$178
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.
LAS-YYZ
LAX-YYZ
SFO-YYZ
LAX-YTZ
SAN-YYZ
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
LAS-YYZ
LAX-YYZ
SFO-YYZ
LAX-YTZ
What is the cheapest month to book a flight from California to Region of Ontario?
Currently, February is the cheapest month in which you can book a flight from California to Region of Ontario (average of $395). Flying from California to Region of Ontario in December is currently the most expensive (average of $587). 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 September 12, 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 34% on your trip compared to booking a flight in the evening.
Weekly flight availability from California to Region of Ontario
Explore weekly flight availability from California 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 12, 2026.
The most flights from USCA to CAON are scheduled on a Thursday (29 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (9 on average).
How much does it cost to fly round-trip from California to Region of Ontario?
Airfare is typical for this route at the moment.
California to Region of Ontario flights typically cost between $295 and $566 in November.The cheapest round-trip price found within the last 5 days was $298 on Multiple Airlines (Nov 14-Nov 16).
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 89 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 September 5, 2026.
Travelers seeking maximum savings on their California to Region of Ontario flight should consider departing on Wednesday mornings when fares are most often at their lowest. Saturday evenings 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 September 12, 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
Comfort
8.0
Crew
8.6
Food
7.6
Boarding
8.2
Entertainment
6.9
Reviews
1 / 20
6.0
GoodShannon,Jul 2026
YQT - YOW
Overall
8.0
Comfort
8.0
Crew
8.6
Food
7.6
Boarding
8.2
Entertainment
6.9
Reviews
1 / 20
6.0
GoodShannon,Jul 2026
YQT - YOW
Overall
8.0
Comfort
8.0
Crew
8.6
Food
7.6
Boarding
8.2
Entertainment
6.9
Reviews
1 / 20
6.0
GoodShannon,Jul 2026
YQT - YOW
Overall
8.0
Comfort
8.0
Crew
8.6
Food
7.6
Boarding
8.2
Entertainment
6.9
Reviews
1 / 20
6.0
GoodShannon,Jul 2026
YQT - YOW
Overall
8.0
Comfort
8.0
Crew
8.6
Food
7.6
Boarding
8.2
Entertainment
6.9
Reviews
1 / 20
6.0
GoodShannon,Jul 2026
YQT - YOW
Overall
8.0
Comfort
8.0
Crew
8.6
Food
7.6
Boarding
8.2
Entertainment
6.9
Reviews
1 / 20
6.0
GoodShannon,Jul 2026
YQT - YOW
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
Toggle through the tabs below to find thousands of 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 September 12, 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 7,457,451 searches. Data last updated September 12, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$135 | Average$431 | FlexibilityNo cancel fee | On-time52% | |
| Cheapest$142 | Average$487 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$147 | Average$473 | FlexibilityNo cancel fee | On-time60% | |
| Cheapest$151 | Average$650 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$160 | Average$439 | FlexibilityNo cancel fee | On-time50% | |
| Cheapest$167 | Average$648 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$293 | Average$430 | FlexibilityNo cancel fee | On-time68% | |
| Cheapest$321 | Average$614 | FlexibilityNo cancel fee | On-time71% |