$41+ 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 11/23. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — LAX
Nov 5 — Nov 121
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 6, 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 6, 2026.
This Trip.com deal was found by Cheapflights users on 10/1. Clicking the “Pick Dates” 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 11/238:31 pm -
Nonstop1h 33m
Fri 11/2710:59 pm -
Nonstop1h 30m
Deal found 10/1![Frontier logo]()
$72
This Mytrip deal was found by Cheapflights users on 10/5. Clicking the “Pick Dates” 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 11/912:01 pm -
Nonstop1h 35m
Mon 11/2310:59 pm -
Nonstop1h 25m
Deal found 10/5![Frontier logo]()
$75
This Super.com deal was found by Cheapflights users on 10/5. Clicking the “Pick Dates” 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 12/47:26 pm -
Nonstop1h 34m
Sun 12/69:56 pm -
Nonstop1h 27m
Deal found 10/5![Frontier logo]()
$76
This Orbitz deal was found by Cheapflights users on 10/6. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/512:01 pm -
Nonstop1h 35m
Mon 11/96:04 pm -
Nonstop1h 26m
Deal found 10/6![Frontier logo]()
$77
This Kiwi.com deal was found by Cheapflights users on 10/2. Clicking the “Pick Dates” 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 10/2912:01 pm -
Nonstop1h 35m
Mon 11/26:04 pm -
Nonstop1h 26m
Deal found 10/2![Frontier logo]()
$78
This CheapOair deal was found by Cheapflights users on 10/6. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/1312:01 pm -
Nonstop1h 35m
Sun 11/156:04 pm -
Nonstop1h 26m
Deal found 10/6![Frontier logo]()
$79
This Kiwi.com deal was found by Cheapflights users on 10/2. Clicking the “Pick Dates” 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 10/2912:01 pm -
Nonstop1h 35m
Thu 11/56:04 pm -
Nonstop1h 26m
Deal found 10/2![Frontier logo]()
$80
This CheapOair deal was found by Cheapflights users on 10/2. Clicking the “Pick Dates” 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 10/2612:01 pm -
Nonstop1h 31m
Mon 11/26:04 pm -
Nonstop1h 26m
Deal found 10/2![Frontier logo]()
$81
This Gotogate deal was found by Cheapflights users on 10/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/310:35 am -
1 stop3h 45m
Mon 11/96:02 pm -
Nonstop1h 26m
Deal found 10/1![Frontier logo]()
$83
This Super.com deal was found by Cheapflights users on 10/6. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/512:01 pm -
Nonstop1h 35m
Thu 11/126:04 pm -
Nonstop1h 26m
Deal found 10/6![Frontier logo]()
$85
This CheapOair deal was found by Cheapflights users on 10/1. Clicking the “Pick Dates” 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.
Wed 12/28:05 am -
1 stop5h 50m
Thu 12/39:56 pm -
Nonstop1h 23m
Deal found 10/1![Frontier logo]()
$86
This Southwest deal was found by Cheapflights users on 10/1. Clicking the “Pick Dates” 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 11/55:55 am -
Nonstop1h 15m
Mon 11/97:30 pm -
Nonstop1h 25m
Deal found 10/1![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 October 6, 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 6, 2026.
This Southwest deal was found by Cheapflights users on 10/4. Clicking the “Pick Dates” 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 11/35:00 pm -
1 stop4h 20m
Tue 11/107:00 am -
1 stop4h 55m
Deal found 10/4![Southwest logo]()
$151
This Delta deal was found by Cheapflights users on 10/3. Clicking the “Pick Dates” 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 10/246:00 am -
1 stop4h 41m
Sat 10/314:49 pm -
1 stop5h 23m
Deal found 10/3![Delta logo]()
$177
This United Airlines deal was found by Cheapflights users on 10/5. Clicking the “Pick Dates” 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 11/141:35 pm -
Nonstop1h 30m
Sat 11/146:50 pm -
Nonstop1h 25m
Deal found 10/5![United Airlines logo]()
$204
This Mytrip deal was found by Cheapflights users on 10/6. 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.
Thu 10/2912:01 pm -
2 stops7h 46m
Sun 11/110:56 am -
1 stop8h 34m
Deal found 10/6![Frontier logo]()
$275
This Alaska Airlines deal was found by Cheapflights users on 10/3. Clicking the “Pick Dates” 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 10/245:45 pm -
1 stop14h 25m
Tue 10/278:01 am -
1 stop9h 04m
Deal found 10/3![Alaska Airlines logo]()
$312
This Kiwi.com deal was found by Cheapflights users on 10/4. Clicking the “Pick Dates” 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 11/62:23 pm -
1 stop7h 09m
Sat 11/711:09 am -
1 stop5h 12m
Deal found 10/4![Multiple Airlines logo]()
$335
This Southwest deal was found by Cheapflights users on 10/3. Clicking the “Pick Dates” 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 10/315:40 am -
1 stop3h 55m
Sat 11/75:00 am -
2 stops7h 50m
Deal found 10/3![Southwest logo]()
$170
This Southwest deal was found by Cheapflights users on 10/3. Clicking the “Pick Dates” 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 11/1812:50 pm -
2 stops7h 20m
Sun 11/225:30 pm -
1 stop4h 30m
Deal found 10/3![Southwest logo]()
$176
This United Airlines deal was found by Cheapflights users on 10/1. Clicking the “Pick Dates” 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 10/286:00 am -
Nonstop1h 30m
Mon 11/29:20 pm -
Nonstop1h 28m
Deal found 10/1![United Airlines logo]()
$207
This Southwest deal was found by Cheapflights users on 10/6. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/35:45 am -
1 stop6h 30m
Tue 11/103:00 pm -
2 stops6h 25m
Deal found 10/6![Southwest logo]()
$182
This Delta deal was found by Cheapflights users on 10/2. Clicking the “Pick Dates” 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 10/309:45 am -
1 stop6h 20m
Mon 11/211:21 am -
1 stop5h 02m
Deal found 10/2![Delta logo]()
$237
This Southwest deal was found by Cheapflights users on 10/5. Clicking the “Pick Dates” 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 11/219:30 pm -
Nonstop1h 20m
Mon 11/235:00 pm -
2 stops5h 00m
Deal found 10/5![Southwest logo]()
$186
This United Airlines deal was found by Cheapflights users on 10/3. Clicking the “Pick Dates” 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 11/181:35 pm -
Nonstop1h 30m
Mon 11/236:50 pm -
Nonstop1h 25m
Deal found 10/3![United Airlines logo]()
$235
This Delta deal was found by Cheapflights users on 10/1. Clicking the “Pick Dates” 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
Sat 11/711:21 am -
1 stop5h 02m
Deal found 10/1![Delta logo]()
$237
This Mytrip deal was found by Cheapflights users on 10/2. Clicking the “Pick Dates” 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 11/192:23 pm -
1 stop5h 24m
Sun 11/224:29 pm -
1 stop8h 00m
Deal found 10/2![Frontier logo]()
$282
This Southwest deal was found by Cheapflights users on 10/4. Clicking the “Pick Dates” 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 10/303:55 pm -
2 stops7h 25m
Mon 11/24:10 pm -
2 stops6h 45m
Deal found 10/4![Southwest logo]()
$197
This United Airlines deal was found by Cheapflights users on 10/6. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/271:35 pm -
Nonstop1h 30m
Tue 10/276:50 pm -
Nonstop1h 25m
Deal found 10/6![United Airlines logo]()
$244
This Delta deal was found by Cheapflights users on 10/6. 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 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 11/24:49 pm -
1 stop5h 23m
Deal found 10/6![Delta logo]()
$266
This Frontier deal was found by Cheapflights users on 10/2. Clicking the “Pick Dates” 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.
Wed 11/1811:52 am -
1 stop12h 05m
Sat 11/218:11 pm -
1 stop4h 13m
Deal found 10/2![Frontier logo]()
$296
This United Airlines deal was found by Cheapflights users on 10/2. Clicking the “Pick Dates” 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 10/316:00 am -
Nonstop1h 30m
Mon 11/29:20 pm -
Nonstop1h 28m
Deal found 10/2![United Airlines logo]()
$249
This Southwest deal was found by Cheapflights users on 10/5. Clicking the “Pick Dates” 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 55m
Mon 12/75:05 pm -
Nonstop1h 20m
Deal found 10/5![Southwest logo]()
$220
This Kiwi.com deal was found by Cheapflights users on 10/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/1812:01 pm -
1 stop25h 15m
Thu 10/223:14 pm -
1 stop28h 26m
Deal found 10/2![Frontier logo]()
$307
This Alaska Airlines deal was found by Cheapflights users on 10/2. Clicking the “Pick Dates” 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 10/235:45 pm -
1 stop14h 25m
Sun 10/258:01 am -
1 stop9h 04m
Deal found 10/2![Alaska Airlines logo]()
$373
This Delta deal was found by Cheapflights users on 10/4. Clicking the “Pick Dates” 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 11/96:00 am -
1 stop4h 43m
Mon 12/144:50 pm -
1 stop7h 07m
Deal found 10/4![Delta logo]()
$297
This United Airlines deal was found by Cheapflights users on 10/6. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 1/166:00 am -
Nonstop1h 33m
Tue 1/1910:55 am -
Nonstop1h 24m
Deal found 10/6![United Airlines logo]()
$281
This Southwest deal was found by Cheapflights users on 10/6. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/412:50 pm -
2 stops5h 55m
Wed 11/115:20 pm -
1 stop3h 20m
Deal found 10/6![Southwest logo]()
$234
This Frontier deal was found by Cheapflights users on 10/1. Clicking the “Pick Dates” 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.
Fri 10/168:00 am -
1 stop5h 20m
Sun 10/189:02 pm -
1 stop10h 02m
Deal found 10/1![Frontier logo]()
$320
This Delta deal was found by Cheapflights users on 10/2. Clicking the “Pick Dates” 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 stop6h 02m
Sat 12/125:01 pm -
1 stop5h 28m
Deal found 10/2![Delta logo]()
$303
This Southwest deal was found by Cheapflights users on 10/5. Clicking the “Pick Dates” 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 1/512:50 pm -
2 stops7h 20m
Thu 1/72:15 pm -
1 stop4h 15m
Deal found 10/5![Southwest logo]()
$235
This United Airlines deal was found by Cheapflights users on 10/6. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/16:00 am -
1 stop3h 36m
Mon 11/22:15 pm -
1 stop6h 00m
Deal found 10/6![United Airlines logo]()
$298
Last-minute flights from Ontario to CaliforniaDiscover last-minute flight deals from Ontario to California. Data last updated October 6, 2026 and is based on user searches.
Discover last-minute flight deals from Ontario to California. Data last updated October 6, 2026 and is based on user searches.
This CheapOair deal was found by Cheapflights users on 10/2. Clicking the “Pick Dates” 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 10/2612:01 pm -
Nonstop1h 31m
Mon 11/26:04 pm -
Nonstop1h 26m
Deal found 10/2![Frontier logo]()
$81
This Kiwi.com deal was found by Cheapflights users on 10/2. Clicking the “Pick Dates” 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 10/2912:01 pm -
Nonstop1h 35m
Mon 11/26:04 pm -
Nonstop1h 26m
Deal found 10/2![Frontier logo]()
$78
This Kiwi.com deal was found by Cheapflights users on 10/2. Clicking the “Pick Dates” 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 10/2912:01 pm -
Nonstop1h 35m
Thu 11/56:04 pm -
Nonstop1h 26m
Deal found 10/2![Frontier logo]()
$80
This Frontier deal was found by Cheapflights users on 10/6. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/298:35 pm -
1 stop17h 11m
Mon 11/22:41 pm -
1 stop18h 59m
Deal found 10/6![Frontier logo]()
$118
This Gotogate deal was found by Cheapflights users on 10/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/310:35 am -
1 stop3h 45m
Mon 11/96:02 pm -
Nonstop1h 26m
Deal found 10/1![Frontier logo]()
$83
This Super.com deal was found by Cheapflights users on 10/2. Clicking the “Pick Dates” 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 11/512:01 pm -
Nonstop1h 35m
Sun 11/86:04 pm -
Nonstop1h 26m
Deal found 10/2![Frontier logo]()
$76
This Orbitz deal was found by Cheapflights users on 10/6. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/512:01 pm -
Nonstop1h 35m
Mon 11/96:04 pm -
Nonstop1h 26m
Deal found 10/6![Frontier logo]()
$77
This Super.com deal was found by Cheapflights users on 10/6. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/512:01 pm -
Nonstop1h 35m
Thu 11/126:04 pm -
Nonstop1h 26m
Deal found 10/6![Frontier logo]()
$85
This Southwest deal was found by Cheapflights users on 10/1. Clicking the “Pick Dates” 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 11/55:55 am -
Nonstop1h 15m
Mon 11/97:30 pm -
Nonstop1h 25m
Deal found 10/1![Southwest logo]()
$117
This Mytrip deal was found by Cheapflights users on 10/5. Clicking the “Pick Dates” 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 11/912:01 pm -
Nonstop1h 35m
Mon 11/2310:59 pm -
Nonstop1h 25m
Deal found 10/5![Frontier logo]()
$75
This CheapOair deal was found by Cheapflights users on 10/6. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/1312:01 pm -
Nonstop1h 35m
Sun 11/156:04 pm -
Nonstop1h 26m
Deal found 10/6![Frontier logo]()
$79
This Trip.com deal was found by Cheapflights users on 10/1. Clicking the “Pick Dates” 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 11/238:31 pm -
Nonstop1h 33m
Fri 11/2710:59 pm -
Nonstop1h 30m
Deal found 10/1![Frontier logo]()
$72
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 6, 2026.
Search for one-way flight options from Ontario to California. Find affordable one-way fares based on user searches. Data last updated October 6, 2026.
This Super.com deal was found by Cheapflights users on 10/5. Clicking the “Pick Dates” 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 11/238:31 pm -
Nonstop1h 33m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/5![Frontier logo]()
$41
This Super.com deal was found by Cheapflights users on 10/2. Clicking the “Pick Dates” 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.
Sun 11/1512:01 pm -
Nonstop1h 35m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/2![Frontier logo]()
$42
This Super.com deal was found by Cheapflights users on 10/6. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/512:01 pm -
Nonstop1h 35m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/6![Frontier logo]()
$43
This Trip.com deal was found by Cheapflights users on 10/2. Clicking the “Pick Dates” 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 10/2212:01 pm -
Nonstop1h 31m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/2![Frontier logo]()
$44
This Kissandfly.com deal was found by Cheapflights users on 10/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kissandfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/57:26 pm -
Nonstop1h 35m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/4![Frontier logo]()
$45
This Mytrip deal was found by Cheapflights users on 10/3. Clicking the “Pick Dates” 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 -
Nonstop1h 35m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/3![Frontier logo]()
$46
This Super.com deal was found by Cheapflights users on 10/6. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/253:55 pm -
Nonstop1h 36m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/6![Frontier logo]()
$50
This Super.com deal was found by Cheapflights users on 10/1. Clicking the “Pick Dates” 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.
Sat 11/218:31 pm -
Nonstop1h 33m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/1![Frontier logo]()
$51
This CheapOair deal was found by Cheapflights users on 10/1. Clicking the “Pick Dates” 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 10/1![Frontier logo]()
$52
This Kiwi.com deal was found by Cheapflights users on 10/5. Clicking the “Pick Dates” 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 12/37:26 pm -
Nonstop1h 34m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/5![Frontier logo]()
$53
This Super.com deal was found by Cheapflights users on 10/6. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/2912:01 pm -
Nonstop1h 35m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/6![Frontier logo]()
$54
This CheapOair deal was found by Cheapflights users on 10/5. Clicking the “Pick Dates” 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 10/2612:01 pm -
Nonstop1h 31m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/5![Frontier logo]()
$55
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 6, 2026.
Round-trip from | $72 (Trip.com) |
|---|---|
One-way from | $41 (Super.com) |
Good round-trip deal | $172 or less |
Good one-way deal | $85 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 6, 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
OntarioSan Francisco
ONT Ontario - SFO San Francisco
ONTSFO
Ontario
Fri 11/6
7:00 am-11:30 am
1 stop4h 30m
San Francisco
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$77
OntarioSan Francisco
ONT Ontario - SFO San Francisco
ONTSFO
Ontario
Sat 10/31
5:40 am-9:35 am
1 stop3h 55m
San Francisco
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$90
OntarioSan Francisco
ONT Ontario - SFO San Francisco
ONTSFO
Ontario
Thu 12/3
8:40 am-4:15 pm
2 stops7h 35m
San Francisco
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$95
OntarioOakland
ONT Ontario - OAK Oakland
ONTOAK
Ontario
Wed 11/4
6:55 pm-8:25 pm
Nonstop1h 30m
Oakland
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$96
OntarioSan Francisco
ONT Ontario - SFO San Francisco
ONTSFO
Ontario
Sat 11/14
1:35 pm-3:05 pm
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
Wed 11/25
6:30 pm-12:30 am
1 stop6h 00m
San Francisco
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$106
OntarioSanta Rosa
ONT Ontario - STS Santa Rosa Sonoma County
ONTSTS
Ontario
Tue 10/27
5:45 pm-7:25 pm
Nonstop1h 40m
Santa Rosa Sonoma County
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$109
OntarioSan Diego
ONT Ontario - SAN San Diego
ONTSAN
Ontario
Mon 11/9
12:01 pm-6:38 pm
1 stop6h 37m
San Diego
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$114
Quickest round-trip
OntarioOakland
ONT Ontario - OAK Oakland
ONTOAK
Ontario
Mon 11/9
11:20 am-12:40 pm
Nonstop1h 20m
Oakland
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$114
OntarioSan Jose
ONT Ontario - SJC San Jose
ONTSJC
Ontario
Wed 11/25
6:30 pm-11:55 pm
1 stop5h 25m
San Jose
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$118
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-STS
ONT-SAN
ONT-FAT
ONT-SJC
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-STS
ONT-SAN
ONT-FAT
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 $190). Flying from Ontario to California in February is currently the most expensive (average of $322). 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 6, 2026.
Unlike at noon, when flights are generally more expensive, you can save up to 14% 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 3, 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 6, 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.
Crew
8.5
Overall
7.9
Food
7.0
Comfort
7.8
Boarding
8.1
Entertainment
7.0
Reviews
1 / 20
10.0
ExcellentAnonymous,Jan 2026
STS - LAX
Crew
8.5
Overall
7.9
Food
7.0
Comfort
7.8
Boarding
8.1
Entertainment
7.0
Reviews
1 / 20
10.0
ExcellentAnonymous,Jan 2026
STS - LAX
Crew
8.5
Overall
7.9
Food
7.0
Comfort
7.8
Boarding
8.1
Entertainment
7.0
Reviews
1 / 20
10.0
ExcellentAnonymous,Jan 2026
STS - LAX
Crew
8.5
Overall
7.9
Food
7.0
Comfort
7.8
Boarding
8.1
Entertainment
7.0
Reviews
1 / 20
10.0
ExcellentAnonymous,Jan 2026
STS - LAX
Crew
8.5
Overall
7.9
Food
7.0
Comfort
7.8
Boarding
8.1
Entertainment
7.0
Reviews
1 / 20
10.0
ExcellentAnonymous,Jan 2026
STS - LAX
Crew
8.5
Overall
7.9
Food
7.0
Comfort
7.8
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.
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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 6, 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 6, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$29 | Average$180 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$91 | Average$192 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$117 | Average$317 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$120 | Average$169 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$136 | Average$335 | FlexibilityNo cancel fee | On-time63% |