$40+ Cheap flights from Ontario (ONT) to California
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 11/6. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — LAX
Oct 22 — Oct 291
Round-trip
1 adult, Economy
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Find cheap flights from Ontario to California 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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Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Ontario to California
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Cheapest flights from Ontario to CaliforniaExplore the most affordable flight options available from Ontario to California. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 22, 2026.
Explore the most affordable flight options available from Ontario to California. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 22, 2026.
This Cheapflightsfares deal was found by Cheapflights users on 9/19. Clicking the “Pick Dates” 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.
Tue 12/157:26 pm -
Nonstop1h 35m
Thu 12/177:41 am -
Nonstop1h 29m
Deal found 9/19![Frontier logo]()
$60
This Priceline 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/1912:01 pm -
Nonstop1h 31m
Mon 10/266:02 pm -
Nonstop1h 38m
Deal found 9/18![Frontier logo]()
$61
This Priceline 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/27:26 pm -
Nonstop1h 34m
Tue 12/89:56 pm -
Nonstop1h 27m
Deal found 9/18![Frontier logo]()
$62
This Super.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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/1612:01 pm -
Nonstop1h 31m
Mon 10/196:02 pm -
Nonstop1h 38m
Deal found 9/18![Frontier logo]()
$64
This Cheapflightsfares deal was found by Cheapflights users on 9/19. Clicking the “Pick Dates” 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.
Fri 11/612:01 pm -
Nonstop1h 35m
Mon 11/96:02 pm -
Nonstop1h 26m
Deal found 9/19![Frontier logo]()
$65
This Booking.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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/2212:01 pm -
Nonstop1h 31m
Mon 10/266:02 pm -
Nonstop1h 38m
Deal found 9/18![Frontier logo]()
$67
This Trip.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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/37:26 pm -
Nonstop1h 34m
Mon 12/79:56 pm -
Nonstop1h 27m
Deal found 9/18![Frontier logo]()
$69
This FlightHub deal was found by Cheapflights users on 9/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/112:07 pm -
Nonstop1h 36m
Sun 10/46:02 pm -
Nonstop1h 34m
Deal found 9/22![Frontier logo]()
$71
This Super.com deal was found by Cheapflights users on 9/20. Clicking the “Pick Dates” 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.
Fri 10/212:07 pm -
Nonstop1h 36m
Mon 10/126:02 pm -
Nonstop1h 38m
Deal found 9/20![Frontier logo]()
$72
This Super.com deal was found by Cheapflights users on 9/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/1912:01 pm -
Nonstop1h 35m
Mon 11/2310:59 pm -
Nonstop1h 30m
Deal found 9/22![Frontier logo]()
$74
This Trip.com deal was found by Cheapflights users on 9/21. Clicking the “Pick Dates” 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 12/127:26 pm -
Nonstop1h 35m
Sun 12/139:56 pm -
Nonstop1h 27m
Deal found 9/21![Frontier logo]()
$75
This Southwest deal was found by Cheapflights users on 9/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/510:35 am -
Nonstop1h 15m
Tue 11/104:35 pm -
Nonstop1h 15m
Deal found 9/22![Southwest logo]()
$117
Best flights from Ontario to CaliforniaDiscover carefully curated flight deals from Ontario to California that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 22, 2026.
Discover carefully curated flight deals from Ontario to California that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 22, 2026.
This United 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/241:52 pm -
Nonstop1h 29m
Sat 10/316:50 pm -
Nonstop1h 25m
Deal found 9/17![United Airlines logo]()
$119
This Southwest deal was found by Cheapflights users on 9/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/96:50 pm -
1 stop5h 05m
Thu 11/1211:20 am -
Nonstop1h 20m
Deal found 9/20![Southwest logo]()
$127
This Mytrip deal was found by Cheapflights users on 9/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/410:35 am -
2 stops8h 03m
Thu 11/510:56 am -
1 stop8h 32m
Deal found 9/19![Frontier logo]()
$143
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.
Mon 10/125:45 pm -
Nonstop1h 40m
Sat 10/173:32 pm -
Nonstop1h 33m
Deal found 9/17![Alaska Airlines logo]()
$157
This Delta deal was found by Cheapflights users on 9/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/316:00 am -
1 stop4h 41m
Mon 11/211:21 am -
1 stop5h 02m
Deal found 9/20![Delta logo]()
$237
This Southwest deal was found by Cheapflights users on 9/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/146:20 am -
Nonstop1h 15m
Fri 10/166:45 am -
Nonstop1h 20m
Deal found 9/21![Southwest logo]()
$144
This Mytrip deal was found by Cheapflights users on 9/20. Clicking the “Pick Dates” 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.
Tue 10/276:25 am -
1 stop9h 33m
Thu 10/2910:48 am -
1 stop8h 40m
Deal found 9/20![Frontier logo]()
$159
This Southwest deal was found by Cheapflights users on 9/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/94:00 pm -
2 stops6h 45m
Thu 11/125:15 am -
1 stop5h 35m
Deal found 9/20![Southwest logo]()
$156
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/174:03 pm -
Nonstop1h 47m
Sat 10/179:25 pm -
Nonstop1h 26m
Deal found 9/18![United Airlines logo]()
$202
This Alaska Airlines deal was found by Cheapflights users on 9/21. Clicking the “Pick Dates” 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 10/175:45 pm -
Nonstop1h 40m
Sun 10/183:32 pm -
Nonstop1h 33m
Deal found 9/21![Alaska Airlines logo]()
$217
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/206:10 am -
2 stops9h 00m
Wed 10/286:55 am -
2 stops8h 40m
Deal found 9/17![Southwest logo]()
$187
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/141:52 pm -
Nonstop1h 29m
Thu 10/159:25 pm -
Nonstop1h 26m
Deal found 9/18![United Airlines logo]()
$207
This Mytrip deal was found by Cheapflights users on 9/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/46:25 am -
1 stop9h 33m
Wed 11/114:53 pm -
1 stop6h 58m
Deal found 9/21![Frontier logo]()
$208
This United Airlines deal was found by Cheapflights users on 9/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/141:52 pm -
Nonstop1h 29m
Wed 10/219:25 pm -
Nonstop1h 26m
Deal found 9/22![United Airlines logo]()
$207
This Delta deal was found by Cheapflights users on 9/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/106:00 am -
1 stop4h 41m
Tue 10/134:49 pm -
1 stop7h 06m
Deal found 9/20![Delta logo]()
$267
This Mytrip deal was found by Cheapflights users on 9/20. Clicking the “Pick Dates” 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 11/212:01 pm -
1 stop6h 37m
Sat 11/144:53 pm -
2 stops18h 23m
Deal found 9/20![Frontier logo]()
$226
This Southwest deal was found by Cheapflights users on 9/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/265:40 am -
2 stops6h 20m
Tue 12/111:55 am -
Nonstop1h 20m
Deal found 9/20![Southwest logo]()
$206
This United Airlines deal was found by Cheapflights users on 9/21. Clicking the “Pick Dates” 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 10/171:52 pm -
Nonstop1h 29m
Mon 10/1910:43 am -
Nonstop1h 35m
Deal found 9/21![United Airlines logo]()
$207
This Alaska Airlines 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/285:45 pm -
1 stop14h 25m
Sat 10/3112:48 pm -
1 stop4h 17m
Deal found 9/18![Alaska Airlines logo]()
$263
This Delta deal was found by Cheapflights users on 9/20. Clicking the “Pick Dates” 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 10/306:00 am -
1 stop4h 41m
Sun 11/14:49 pm -
1 stop5h 22m
Deal found 9/20![Delta logo]()
$267
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/266:00 am -
Nonstop1h 15m
Mon 10/265:15 pm -
2 stops6h 35m
Deal found 9/18![Southwest logo]()
$206
This Mytrip deal was found by Cheapflights users on 9/20. Clicking the “Pick Dates” 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.
Thu 10/158:35 pm -
2 stops16h 41m
Mon 10/193:14 pm -
2 stops19h 15m
Deal found 9/20![Frontier logo]()
$229
This United Airlines deal was found by Cheapflights users on 9/21. Clicking the “Pick Dates” 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 10/611:10 am -
Nonstop1h 33m
Fri 10/169:25 pm -
Nonstop1h 26m
Deal found 9/21![United Airlines logo]()
$219
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/226:00 am -
1 stop4h 41m
Mon 10/264:49 pm -
1 stop7h 06m
Deal found 9/17![Delta logo]()
$288
This Alaska Airlines deal was found by Cheapflights users on 9/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/232:13 pm -
1 stop22h 53m
Sat 10/243:32 pm -
Nonstop1h 33m
Deal found 9/21![Alaska Airlines logo]()
$292
This Mytrip deal was found by Cheapflights users on 9/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/2111:26 am -
2 stops12h 30m
Thu 10/223:14 pm -
2 stops19h 15m
Deal found 9/19![Frontier logo]()
$245
This Southwest deal was found by Cheapflights users on 9/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/175:45 am -
1 stop6h 15m
Sat 10/247:10 pm -
Nonstop1h 20m
Deal found 9/19![Southwest logo]()
$227
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/16:00 am -
Nonstop1h 30m
Tue 11/311:00 am -
Nonstop1h 29m
Deal found 9/18![United Airlines logo]()
$228
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/206:00 am -
1 stop4h 41m
Wed 10/284:49 pm -
1 stop7h 06m
Deal found 9/17![Delta logo]()
$288
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.
Wed 10/215:45 pm -
1 stop14h 25m
Wed 10/288:01 am -
1 stop9h 04m
Deal found 9/17![Alaska Airlines logo]()
$296
Last-minute flights from Ontario to CaliforniaDiscover last-minute flight deals from Ontario to California. Data last updated September 22, 2026 and is based on user searches.
Discover last-minute flight deals from Ontario to California. Data last updated September 22, 2026 and is based on user searches.
This FlightHub deal was found by Cheapflights users on 9/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/112:07 pm -
Nonstop1h 36m
Sun 10/46:02 pm -
Nonstop1h 34m
Deal found 9/22![Frontier logo]()
$71
This Super.com deal was found by Cheapflights users on 9/20. Clicking the “Pick Dates” 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.
Fri 10/212:07 pm -
Nonstop1h 36m
Mon 10/126:02 pm -
Nonstop1h 38m
Deal found 9/20![Frontier logo]()
$72
This Cheapflightsfares deal was found by Cheapflights users on 9/19. Clicking the “Pick Dates” 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.
Thu 10/1512:01 pm -
Nonstop1h 31m
Fri 10/166:02 pm -
Nonstop1h 38m
Deal found 9/19![Frontier logo]()
$65
This Super.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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/1512:01 pm -
Nonstop1h 31m
Sun 10/186:02 pm -
Nonstop1h 38m
Deal found 9/18![Frontier logo]()
$77
This Mytrip deal was found by Cheapflights users on 9/19. Clicking the “Pick Dates” 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.
Thu 10/151:38 pm -
1 stop5h 26m
Mon 10/196:02 pm -
Nonstop1h 38m
Deal found 9/19![Frontier logo]()
$83
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/156:00 am -
Nonstop1h 15m
Thu 10/226:45 am -
Nonstop1h 20m
Deal found 9/17![Southwest logo]()
$117
This Super.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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/1612:01 pm -
Nonstop1h 31m
Mon 10/196:02 pm -
Nonstop1h 38m
Deal found 9/18![Frontier logo]()
$64
This Priceline 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/1612:01 pm -
Nonstop1h 31m
Fri 10/236:02 pm -
Nonstop1h 38m
Deal found 9/18![Frontier logo]()
$82
This Priceline 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/1912:01 pm -
Nonstop1h 31m
Mon 10/266:02 pm -
Nonstop1h 38m
Deal found 9/18![Frontier logo]()
$61
This Super.com deal was found by Cheapflights users on 9/21. Clicking the “Pick Dates” 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.
Mon 10/1912:01 pm -
Nonstop1h 31m
Thu 10/226:02 pm -
Nonstop1h 38m
Deal found 9/21![Frontier logo]()
$81
This Booking.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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/2212:01 pm -
Nonstop1h 31m
Mon 10/266:02 pm -
Nonstop1h 38m
Deal found 9/18![Frontier logo]()
$67
This Booking.com deal was found by Cheapflights users on 9/19. Clicking the “Pick Dates” 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.
Thu 10/2212:01 pm -
Nonstop1h 31m
Sun 10/256:02 pm -
Nonstop1h 38m
Deal found 9/19![Frontier logo]()
$78
One-way flights from Ontario to CaliforniaSearch for one-way flight options from Ontario to California. Find affordable one-way fares based on user searches. Data last updated September 22, 2026.
Search for one-way flight options from Ontario to California. Find affordable one-way fares based on user searches. Data last updated September 22, 2026.
This Super.com deal was found by Cheapflights users on 9/19. Clicking the “Pick Dates” 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.
Fri 11/612:01 pm -
Nonstop1h 35m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/19![Frontier logo]()
$40
This Booking.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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/1312:01 pm -
Nonstop1h 35m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/18![Frontier logo]()
$41
This Booking.com deal was found by Cheapflights users on 9/19. Clicking the “Pick Dates” 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 10/1612:01 pm -
Nonstop1h 31m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/19![Frontier logo]()
$42
This Super.com deal was found by Cheapflights users on 9/19. Clicking the “Pick Dates” 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.
Mon 9/2812:07 pm -
Nonstop1h 36m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/19![Frontier logo]()
$43
This Trip.com deal was found by Cheapflights users on 9/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/17:26 pm -
Nonstop1h 34m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/19![Frontier logo]()
$45
This FlightHub 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/1912:01 pm -
Nonstop1h 31m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/18![Frontier logo]()
$46
This Super.com deal was found by Cheapflights users on 9/20. Clicking the “Pick Dates” 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.
Fri 10/212:07 pm -
Nonstop1h 36m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/20![Frontier logo]()
$48
This Super.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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/112:07 pm -
Nonstop1h 36m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/18![Frontier logo]()
$49
This Super.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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/2612:01 pm -
Nonstop1h 31m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/18![Frontier logo]()
$50
This Trip.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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/212:01 pm -
1 stop6h 37m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/18![Frontier logo]()
$51
This Super.com deal was found by Cheapflights users on 9/20. Clicking the “Pick Dates” 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.
Mon 10/198:00 am -
1 stop5h 20m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/20![Frontier logo]()
$58
This Southwest deal was found by Cheapflights users on 9/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/197:05 pm -
Nonstop1h 10m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/20![Southwest logo]()
$59
Find flight deals from Ontario to California
Keep the following information in mind while searching for Ontario to California flight deals. Data was last updated September 22, 2026.
Round-trip from | $60 (Cheapflightsfares) |
|---|---|
One-way from | $40 (Super.com) |
Good round-trip deal | $185 or less |
Good one-way deal | $106 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Ontario to California 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 22, 2026.
Use the filters below to find and compare flights from Ontario to California that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
Quickest round-trip
OntarioSan Jose
ONT Ontario - SJC San Jose
ONTSJC
Ontario
Tue 10/20
6:20 am-7:35 am
Nonstop1h 15m
San Jose
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$59
OntarioSan Francisco
ONT Ontario - SFO San Francisco
ONTSFO
Ontario
Thu 12/17
6:00 am-7:33 am
Nonstop1h 33m
San Francisco
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$59
OntarioSan Francisco
ONT Ontario - SFO San Francisco
ONTSFO
Ontario
Wed 10/14
1:52 pm-3:21 pm
Nonstop1h 29m
San Francisco
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$59
OntarioSan Jose
ONT Ontario - SJC San Jose
ONTSJC
Ontario
Sat 10/17
3:10 pm-7:10 pm
1 stop4h 00m
San Jose
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$69
OntarioSan Francisco
ONT Ontario - SFO San Francisco
ONTSFO
Ontario
Sat 10/31
9:30 am-4:20 pm
2 stops6h 50m
San Francisco
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$81
OntarioSan Francisco
ONT Ontario - SFO San Francisco
ONTSFO
Ontario
Mon 12/14
12:50 pm-8:10 pm
2 stops7h 20m
San Francisco
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$81
OntarioSan Diego
ONT Ontario - SAN San Diego
ONTSAN
Ontario
Thu 10/29
12:01 pm-6:38 pm
1 stop6h 37m
San Diego
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$87
OntarioSan Diego
ONT Ontario - SAN San Diego
ONTSAN
Ontario
Wed 10/21
11:26 am-1:16 pm
2 stops25h 50m
San Diego
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$104
OntarioSan Diego
ONT Ontario - SAN San Diego
ONTSAN
Ontario
Tue 11/3
11:52 am-11:57 pm
1 stop12h 05m
San Diego
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$107
OntarioSanta Rosa
ONT Ontario - STS Santa Rosa Sonoma County
ONTSTS
Ontario
Mon 10/12
5:45 pm-7:25 pm
Nonstop1h 40m
Santa Rosa Sonoma County
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$109
Showing 1-10 of 60 resultsSorted by cheapest first
Best time to book a flight from Ontario to California
Have a flexible travel schedule? Discover the best time to fly to California from Ontario with our price prediction graph.
ONT-SFO
ONT-SJC
ONT-SAN
ONT-STS
ONT-SMF
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 Ontario to California
ONT-USCA
ONT-SFO
ONT-SJC
ONT-SAN
ONT-STS
What is the cheapest month to book a flight from Ontario to California?
Currently, October is the cheapest month in which you can book a flight from Ontario to California (average of $176). Flying from Ontario to California in January is currently the most expensive (average of $323). 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 ONT to CA?
Find hourly flight availability from Ontario to California. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 22, 2026.
Unlike in the morning, when flights are generally more expensive, you can save up to 15% on flights from Ontario to California by exploring options for tickets in the evening.
How far ahead should I book a flight from Ontario to California?
The price you pay for your flight from Ontario to California may vary depending on when you book. For the best chance of a lower fare, look to book 72 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.
What is the cheapest day to fly from Ontario to California?
Use this chart to determine the cheapest time to fly round-trip from Ontario to California. Price data was last updated on September 19, 2026.
Travelers seeking maximum savings on their Ontario to California flight should consider departing on Saturday at noon when fares are most often at their lowest. Sunday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.
Reviews of airlines servicing California
Get insights into the airlines that provide service to California. 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 California. Reviews last updated September 22, 2026.
Get a feel of what it's like to fly with Southwest,Alaska Airlines, andUnited Airlines from Ontario to California by reading reviews from past customers. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Boarding
8.1
Comfort
8.0
Overall
8.0
Crew
8.6
Entertainment
7.5
Food
7.0
Reviews
1 / 20
8.0
ExcellentWalter,Aug 2025
OAK - SAN
Boarding
8.1
Comfort
8.0
Overall
8.0
Crew
8.6
Entertainment
7.5
Food
7.0
Reviews
1 / 20
8.0
ExcellentWalter,Aug 2025
OAK - SAN
Boarding
8.1
Comfort
8.0
Overall
8.0
Crew
8.6
Entertainment
7.5
Food
7.0
Reviews
1 / 20
8.0
ExcellentWalter,Aug 2025
OAK - SAN
Boarding
8.1
Comfort
8.0
Overall
8.0
Crew
8.6
Entertainment
7.5
Food
7.0
Reviews
1 / 20
8.0
ExcellentWalter,Aug 2025
OAK - SAN
Boarding
8.1
Comfort
8.0
Overall
8.0
Crew
8.6
Entertainment
7.5
Food
7.0
Reviews
1 / 20
8.0
ExcellentWalter,Aug 2025
OAK - SAN
Boarding
8.1
Comfort
8.0
Overall
8.0
Crew
8.6
Entertainment
7.5
Food
7.0
Reviews
1 / 20
8.0
ExcellentWalter,Aug 2025
OAK - SAN
Related info for your journey
Find useful and relevant information for your journey from Ontario to California. 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 Ontario to California
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to California by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Ontario to California by cabin class
Find flights from Ontario to California, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Ontario and California flights
Browse other Ontario and California flight options. Last updated on September 22, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Ontario to California flights
Consider these flights traveling from Ontario to California.
Top 5 airlines flying from Ontario to California
Discover the top 5 airlines that operate flights from Ontario to California. 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 22, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$29 | Average$165 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$91 | Average$192 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$106 | Average$314 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$120 | Average$188 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$137 | Average$336 | FlexibilityNo cancel fee | On-time63% |