$21+ 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 11/24. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — LAX
Nov 25 — Dec 21
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
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.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 October 26, 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 October 26, 2026.
This WAYA deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure WAYA is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/2412:24 pm -
Nonstop1h 20m
Tue 12/112:28 pm -
1 stop5h 43m
Deal found 10/26![Frontier logo]()
$71
This CheapOair deal was found by Cheapflights users on 10/21. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/72:53 pm -
1 stop18h 41m
Tue 12/89:56 pm -
Nonstop1h 27m
Deal found 10/21![Frontier logo]()
$81
This Cheapflightsfares deal was found by Cheapflights users on 10/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/32:00 pm -
1 stop22h 36m
Sat 12/129:56 pm -
Nonstop1h 27m
Deal found 10/23![Frontier logo]()
$82
This Kiwi.com deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/88:44 am -
2 stops11h 24m
Wed 12/99:56 pm -
Nonstop1h 27m
Deal found 10/26![Frontier logo]()
$84
This Kiwi.com deal was found by Cheapflights users on 10/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/17:06 pm -
Nonstop1h 34m
Sat 12/59:56 pm -
Nonstop1h 27m
Deal found 10/24![Frontier logo]()
$85
This CheapOair deal was found by Cheapflights users on 10/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/211:37 pm -
Nonstop1h 20m
Tue 12/112:28 pm -
1 stop24h 11m
Deal found 10/25![Frontier logo]()
$86
This CheapOair deal was found by Cheapflights users on 10/22. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/72:53 pm -
1 stop22h 34m
Fri 12/119:56 pm -
Nonstop1h 27m
Deal found 10/22![Frontier logo]()
$86
This Expedia deal was found by Cheapflights users on 10/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/208:31 pm -
Nonstop1h 33m
Mon 11/239:11 pm -
1 stop22h 25m
Deal found 10/24![Frontier logo]()
$87
This Frontier deal was found by Cheapflights users on 10/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/2412:24 pm -
Nonstop1h 20m
Thu 11/268:35 pm -
Nonstop1h 17m
Deal found 10/25![Frontier logo]()
$88
This CheapOair deal was found by Cheapflights users on 10/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/1212:01 pm -
Nonstop1h 35m
Mon 11/166:04 pm -
Nonstop1h 26m
Deal found 10/25![Frontier logo]()
$88
This Kiwi.com deal was found by Cheapflights users on 10/22. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/22:00 pm -
1 stop21h 33m
Sat 12/512:28 pm -
1 stop6h 03m
Deal found 10/22![Frontier logo]()
$89
This Mytrip deal was found by Cheapflights users on 10/21. 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.
Sat 12/57:26 pm -
Nonstop1h 35m
Sun 12/62:22 pm -
1 stop4h 09m
Deal found 10/21![Frontier logo]()
$90
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 October 26, 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 October 26, 2026.
This Southwest deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/107:05 am -
Nonstop1h 20m
Tue 1/57:40 pm -
Nonstop1h 25m
Deal found 10/26![Southwest logo]()
$117
This United Airlines deal was found by Cheapflights users on 10/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/116:00 am -
Nonstop1h 30m
Tue 1/194:38 pm -
Nonstop1h 25m
Deal found 10/23![United Airlines logo]()
$139
This Southwest deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/1710:25 am -
Nonstop1h 15m
Mon 11/236:30 am -
Nonstop1h 15m
Deal found 10/26![Southwest logo]()
$117
This Kiwi.com deal was found by Cheapflights users on 10/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/2110:47 pm -
1 stop9h 09m
Sat 11/2810:20 pm -
1 stop10h 10m
Deal found 10/24![Multiple Airlines logo]()
$282
This United Airlines deal was found by Cheapflights users on 10/21. 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.
Sun 12/136:00 am -
Nonstop1h 30m
Sun 12/138:45 am -
Nonstop1h 28m
Deal found 10/21![United Airlines logo]()
$154
This Delta deal was found by Cheapflights users on 10/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/176:00 am -
1 stop4h 42m
Tue 12/2211:27 am -
1 stop4h 43m
Deal found 10/25![Delta logo]()
$317
This Southwest deal was found by Cheapflights users on 10/22. 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.
Sun 12/610:35 am -
Nonstop1h 15m
Sun 12/136:20 am -
1 stop4h 30m
Deal found 10/22![Southwest logo]()
$153
This United Airlines deal was found by Cheapflights users on 10/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/196:00 am -
Nonstop1h 33m
Sat 12/199:30 pm -
Nonstop1h 23m
Deal found 10/23![United Airlines logo]()
$191
This Southwest deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 1/72:00 pm -
Nonstop1h 15m
Sun 1/109:20 am -
Nonstop1h 15m
Deal found 10/26![Southwest logo]()
$201
This United Airlines deal was found by Cheapflights users on 10/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/184:00 pm -
Nonstop1h 50m
Sun 12/209:30 pm -
Nonstop1h 23m
Deal found 10/24![United Airlines logo]()
$201
This Alaska Airlines deal was found by Cheapflights users on 10/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 1/1511:36 am -
1 stop28h 08m
Mon 1/184:24 pm -
2 stops24h 53m
Deal found 10/23![Alaska Airlines logo]()
$495
This United Airlines deal was found by Cheapflights users on 10/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 1/911:20 am -
Nonstop1h 33m
Sat 1/168:30 am -
Nonstop1h 27m
Deal found 10/25![United Airlines logo]()
$207
This Southwest deal was found by Cheapflights users on 10/22. 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.
Tue 11/175:45 am -
1 stop4h 00m
Tue 11/248:05 pm -
Nonstop1h 25m
Deal found 10/22![Southwest logo]()
$220
This Delta deal was found by Cheapflights users on 10/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/116:00 am -
1 stop4h 42m
Sun 12/134:50 pm -
1 stop7h 07m
Deal found 10/24![Delta logo]()
$317
This Southwest deal was found by Cheapflights users on 10/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/114:00 pm -
2 stops6h 45m
Sun 12/132:15 pm -
1 stop8h 45m
Deal found 10/24![Southwest logo]()
$222
This United Airlines deal was found by Cheapflights users on 10/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/196:00 am -
Nonstop1h 33m
Sun 1/178:30 am -
Nonstop1h 27m
Deal found 10/25![United Airlines logo]()
$228
This Southwest deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/41:30 pm -
Nonstop1h 25m
Sun 12/68:25 pm -
1 stop3h 15m
Deal found 10/26![Southwest logo]()
$223
This United Airlines deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/2011:27 am -
Nonstop1h 33m
Sun 2/218:55 am -
Nonstop1h 27m
Deal found 10/26![United Airlines logo]()
$228
This Delta deal was found by Cheapflights users on 10/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/46:00 am -
1 stop4h 42m
Sat 12/511:27 am -
1 stop5h 01m
Deal found 10/23![Delta logo]()
$337
This Southwest deal was found by Cheapflights users on 10/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/196:45 pm -
1 stop4h 35m
Sat 1/166:00 am -
2 stops10h 20m
Deal found 10/25![Southwest logo]()
$226
This United Airlines deal was found by Cheapflights users on 10/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/244:00 pm -
Nonstop1h 50m
Sun 12/279:30 pm -
Nonstop1h 23m
Deal found 10/23![United Airlines logo]()
$248
This Southwest deal was found by Cheapflights users on 10/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/51:25 pm -
1 stop4h 45m
Mon 12/75:05 pm -
Nonstop1h 20m
Deal found 10/23![Southwest logo]()
$227
This United Airlines deal was found by Cheapflights users on 10/22. 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.
Mon 2/16:00 am -
Nonstop1h 33m
Fri 2/58:30 am -
Nonstop1h 27m
Deal found 10/22![United Airlines logo]()
$249
This Southwest deal was found by Cheapflights users on 10/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 1/95:25 am -
1 stop4h 25m
Sun 1/107:00 pm -
Nonstop1h 20m
Deal found 10/23![Southwest logo]()
$227
This Delta deal was found by Cheapflights users on 10/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/106:00 am -
1 stop4h 42m
Sun 1/34:50 pm -
1 stop7h 09m
Deal found 10/24![Delta logo]()
$437
This United Airlines deal was found by Cheapflights users on 10/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/26:00 am -
Nonstop1h 33m
Sun 3/710:50 am -
Nonstop1h 30m
Deal found 10/23![United Airlines logo]()
$249
This Southwest deal was found by Cheapflights users on 10/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/259:35 pm -
1 stop10h 25m
Mon 11/309:55 pm -
Nonstop1h 35m
Deal found 10/23![Southwest logo]()
$231
This Southwest deal was found by Cheapflights users on 10/21. 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 11/188:40 am -
2 stops6h 35m
Wed 11/256:00 am -
Nonstop1h 25m
Deal found 10/21![Southwest logo]()
$231
This Delta deal was found by Cheapflights users on 10/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/86:00 am -
1 stop4h 41m
Wed 11/114:47 pm -
1 stop7h 02m
Deal found 10/23![Delta logo]()
$457
This United Airlines deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/196:00 am -
Nonstop1h 33m
Mon 12/2110:33 am -
Nonstop1h 25m
Deal found 10/26![United Airlines logo]()
$274
Last-minute flights from Ontario to CaliforniaDiscover last-minute flight deals from Ontario to California. Data last updated October 26, 2026 and is based on user searches.
Discover last-minute flight deals from Ontario to California. Data last updated October 26, 2026 and is based on user searches.
This CheapOair deal was found by Cheapflights users on 10/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/1212:01 pm -
Nonstop1h 35m
Mon 11/166:04 pm -
Nonstop1h 26m
Deal found 10/25![Frontier logo]()
$88
This Mytrip deal was found by Cheapflights users on 10/22. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/1410:00 am -
1 stop8h 19m
Tue 11/179:14 am -
1 stop7h 07m
Deal found 10/22![Frontier logo]()
$90
This Mytrip deal was found by Cheapflights users on 10/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/1410:00 am -
1 stop8h 19m
Mon 11/166:04 pm -
Nonstop1h 26m
Deal found 10/24![Frontier logo]()
$91
This Mytrip deal was found by Cheapflights users on 10/21. 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.
Sat 11/1410:00 am -
1 stop8h 19m
Wed 11/189:14 am -
1 stop7h 07m
Deal found 10/21![Frontier logo]()
$92
This CheapOair deal was found by Cheapflights users on 10/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/162:23 pm -
1 stop17h 56m
Mon 11/2310:59 pm -
Nonstop1h 25m
Deal found 10/24![Frontier logo]()
$86
This Expedia deal was found by Cheapflights users on 10/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/208:31 pm -
Nonstop1h 33m
Mon 11/239:11 pm -
1 stop22h 25m
Deal found 10/24![Frontier logo]()
$87
This CheapOair deal was found by Cheapflights users on 10/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/211:37 pm -
Nonstop1h 20m
Tue 12/112:28 pm -
1 stop24h 11m
Deal found 10/25![Frontier logo]()
$86
This WAYA deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure WAYA is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/2412:24 pm -
Nonstop1h 20m
Tue 12/112:28 pm -
1 stop5h 43m
Deal found 10/26![Frontier logo]()
$71
This Frontier deal was found by Cheapflights users on 10/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/2412:24 pm -
Nonstop1h 20m
Thu 11/268:35 pm -
Nonstop1h 17m
Deal found 10/25![Frontier logo]()
$88
This CheapOair deal was found by Cheapflights users on 10/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/2412:24 pm -
Nonstop1h 20m
Mon 11/3011:24 am -
1 stop25h 15m
Deal found 10/24![Frontier logo]()
$91
This CheapOair deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/261:43 pm -
Nonstop1h 20m
Tue 12/112:28 pm -
1 stop24h 11m
Deal found 10/26![Frontier logo]()
$81
This CheapOair deal was found by Cheapflights users on 10/21. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/308:31 pm -
Nonstop1h 33m
Wed 12/29:35 pm -
Nonstop1h 23m
Deal found 10/21![Frontier logo]()
$93
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 October 26, 2026.
Search for one-way flight options from Ontario to California. Find affordable one-way fares based on user searches. Data last updated October 26, 2026.
This CheapOair deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/2412:24 pm -
Nonstop1h 20m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/26![Frontier logo]()
$21
This CheapOair deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/261:43 pm -
Nonstop1h 20m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/26![Frontier logo]()
$24
This Trip.com deal was found by Cheapflights users on 10/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/12:00 pm -
1 stop21h 33m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/24![Frontier logo]()
$41
This Super.com deal was found by Cheapflights users on 10/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/47:06 pm -
Nonstop1h 34m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/23![Frontier logo]()
$44
This Trip.com deal was found by Cheapflights users on 10/22. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 1/68:50 am -
1 stop12h 14m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/22![Frontier logo]()
$44
This Mytrip deal was found by Cheapflights users on 10/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/128:44 am -
1 stop10h 53m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/23![Frontier logo]()
$45
This Trip.com deal was found by Cheapflights users on 10/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/1710:35 am -
1 stop25h 18m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/24![Frontier logo]()
$46
This CheapOair deal was found by Cheapflights users on 10/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/1612:01 pm -
Nonstop1h 35m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/25![Frontier logo]()
$46
This Trip.com deal was found by Cheapflights users on 10/22. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/92:53 pm -
1 stop24h 10m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/22![Frontier logo]()
$46
This Trip.com deal was found by Cheapflights users on 10/22. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/2910:48 pm -
1 stop22h 54m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/22![Frontier logo]()
$48
This Trip.com deal was found by Cheapflights users on 10/21. 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.
Tue 1/52:12 pm -
1 stop8h 25m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/21![Frontier logo]()
$49
This Trip.com deal was found by Cheapflights users on 10/22. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/252:01 pm -
1 stop20h 28m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/22![Frontier logo]()
$51
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 October 26, 2026.
Round-trip from | $82 (Cheapflightsfares) |
|---|---|
One-way from | $21 (CheapOair) |
Good round-trip deal | $158 or less |
Good one-way deal | $93 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 October 26, 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
Thu 12/17
5:55 am-7:10 am
Nonstop1h 15m
San Jose
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$59
OntarioSan Jose
ONT Ontario - SJC San Jose
ONTSJC
Ontario
Sat 11/21
8:05 pm-11:55 pm
1 stop3h 50m
San Jose
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$69
OntarioSan Jose
ONT Ontario - SJC San Jose
ONTSJC
Ontario
Tue 11/24
9:30 am-10:50 am
Nonstop1h 20m
San Jose
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$72
OntarioSacramento
ONT Ontario - SMF Sacramento Intl
ONTSMF
Ontario
Tue 11/17
10:35 am-5:24 pm
1 stop6h 49m
Sacramento Intl
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$76
OntarioSan Jose
ONT Ontario - SJC San Jose
ONTSJC
Ontario
Wed 11/18
5:45 am-12:00 pm
2 stops6h 15m
San Jose
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$87
OntarioSan Jose
ONT Ontario - SJC San Jose
ONTSJC
Ontario
Sun 12/13
5:20 pm-11:55 pm
1 stop6h 35m
San Jose
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$89
OntarioSan Francisco
ONT Ontario - SFO San Francisco
ONTSFO
Ontario
Thu 11/12
5:35 am-11:30 am
1 stop5h 55m
San Francisco
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$93
OntarioSan Francisco
ONT Ontario - SFO San Francisco
ONTSFO
Ontario
Fri 1/15
5:00 pm-11:30 pm
2 stops6h 30m
San Francisco
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$95
OntarioSan Francisco
ONT Ontario - SFO San Francisco
ONTSFO
Ontario
Wed 11/18
6:00 am-7:30 am
Nonstop1h 30m
San Francisco
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$104
OntarioSan Francisco
ONT Ontario - SFO San Francisco
ONTSFO
Ontario
Mon 11/23
6:00 am-7:30 am
Nonstop1h 30m
San Francisco
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$104
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-OAK
ONT-SFO
ONT-SJC
ONT-FAT
ONT-STS
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-OAK
ONT-SFO
ONT-SJC
ONT-FAT
What is the cheapest month to book a flight from Ontario to California?
Currently, November is the cheapest month in which you can book a flight from Ontario to California (average of $224). Flying from Ontario to California in January is currently the most expensive (average of $319). 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 October 26, 2026.
Unlike at noon, when flights are generally more expensive, you can save up to 12% 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 October 17, 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 October 26, 2026.
Get a feel of what it's like to fly with Alaska Airlines,Southwest, 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.
Overall
7.9
Crew
8.5
Comfort
7.8
Food
7.0
Boarding
8.1
Entertainment
7.0
Reviews
1 / 20
10.0
ExcellentAnonymous,Jan 2026
STS - LAX
Overall
7.9
Crew
8.5
Comfort
7.8
Food
7.0
Boarding
8.1
Entertainment
7.0
Reviews
1 / 20
10.0
ExcellentAnonymous,Jan 2026
STS - LAX
Overall
7.9
Crew
8.5
Comfort
7.8
Food
7.0
Boarding
8.1
Entertainment
7.0
Reviews
1 / 20
10.0
ExcellentAnonymous,Jan 2026
STS - LAX
Overall
7.9
Crew
8.5
Comfort
7.8
Food
7.0
Boarding
8.1
Entertainment
7.0
Reviews
1 / 20
10.0
ExcellentAnonymous,Jan 2026
STS - LAX
Overall
7.9
Crew
8.5
Comfort
7.8
Food
7.0
Boarding
8.1
Entertainment
7.0
Reviews
1 / 20
10.0
ExcellentAnonymous,Jan 2026
STS - LAX
Overall
7.9
Crew
8.5
Comfort
7.8
Food
7.0
Boarding
8.1
Entertainment
7.0
Reviews
1 / 20
10.0
ExcellentAnonymous,Jan 2026
STS - LAX
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 October 26, 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 October 26, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$29 | Average$168 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$99 | Average$211 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$117 | Average$336 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$117 | Average$319 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$120 | Average$169 | FlexibilityNo cancel fee | On-time62% |