$28+ Cheap flights from Ontario (ONT) to California
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/1. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — LAX
sep. 14 — sep. 211
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 august 15, 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 august 15, 2026.
This Kiwi.com deal was found by Cheapflights users on 8/15. Clicking the “Pick Dates” 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.
man. 9/2812:07 pm -
Nonstop1h 36m
man. 10/56:02 pm -
Nonstop1h 34m
Deal found 8/15![Frontier logo]()
$64
This Booking.com deal was found by Cheapflights users on 8/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
fre. 9/1112:07 pm -
Nonstop1h 36m
fre. 9/116:02 pm -
Nonstop1h 34m
Deal found 8/13![Frontier logo]()
$66
This Super.com deal was found by Cheapflights users on 8/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
tir. 9/13:13 pm -
Nonstop1h 27m
fre. 9/116:02 pm -
Nonstop1h 34m
Deal found 8/11![Frontier logo]()
$70
This Frontier deal was found by Cheapflights users on 8/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
tir. 9/83:13 pm -
Nonstop1h 27m
fre. 9/116:02 pm -
Nonstop1h 34m
Deal found 8/11![Frontier logo]()
$71
This Trip.com deal was found by Cheapflights users on 8/14. Clicking the “Pick Dates” 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.
man. 10/512:07 pm -
Nonstop1h 36m
tor. 10/86:02 pm -
Nonstop1h 38m
Deal found 8/14![Frontier logo]()
$72
This Super.com deal was found by Cheapflights users on 8/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
tir. 9/13:13 pm -
Nonstop1h 27m
tor. 9/39:00 am -
Nonstop1h 29m
Deal found 8/12![Frontier logo]()
$73
This Kiwi.com deal was found by Cheapflights users on 8/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
søn. 9/68:48 am -
Nonstop1h 27m
fre. 9/116:02 pm -
Nonstop1h 34m
Deal found 8/13![Frontier logo]()
$77
This Super.com deal was found by Cheapflights users on 8/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
tor. 9/1012:07 pm -
Nonstop1h 36m
fre. 9/116:02 pm -
Nonstop1h 34m
Deal found 8/13![Frontier logo]()
$78
This Mytrip deal was found by Cheapflights users on 8/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
fre. 9/1112:07 pm -
Nonstop1h 36m
man. 9/146:02 pm -
Nonstop1h 34m
Deal found 8/12![Frontier logo]()
$79
This Super.com deal was found by Cheapflights users on 8/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ons. 9/23:13 pm -
Nonstop1h 27m
søn. 9/69:00 am -
Nonstop1h 29m
Deal found 8/13![Frontier logo]()
$80
This Southwest deal was found by Cheapflights users on 8/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lør. 9/54:40 pm -
Nonstop1h 20m
søn. 9/67:45 am -
Nonstop1h 15m
Deal found 8/12![Southwest logo]()
$109
This Southwest deal was found by Cheapflights users on 8/14. Clicking the “Pick Dates” 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.
lør. 9/1211:00 am -
Nonstop1h 10m
lør. 9/125:00 pm -
Nonstop1h 25m
Deal found 8/14![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 august 15, 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 august 15, 2026.
This Southwest deal was found by Cheapflights users on 8/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lør. 9/55:50 am -
1 stop5h 15m
søn. 9/67:45 am -
Nonstop1h 15m
Deal found 8/10![Southwest logo]()
$118
This Alaska Airlines deal was found by Cheapflights users on 8/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
tor. 10/225:45 pm -
Nonstop1h 40m
lør. 10/243:32 pm -
Nonstop1h 33m
Deal found 8/11![Alaska Airlines logo]()
$157
This Delta deal was found by Cheapflights users on 8/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
tor. 10/226:00 am -
1 stop4h 41m
lør. 10/2411:21 am -
1 stop5h 02m
Deal found 8/11![Delta logo]()
$177
This United Airlines deal was found by Cheapflights users on 8/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ons. 10/148:03 am -
Nonstop1h 27m
man. 10/197:00 pm -
Nonstop1h 31m
Deal found 8/13![United Airlines logo]()
$187
This Southwest deal was found by Cheapflights users on 8/14. Clicking the “Pick Dates” 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.
fre. 9/1810:55 am -
Nonstop1h 10m
man. 9/216:30 am -
Nonstop1h 20m
Deal found 8/14![Southwest logo]()
$134
This Kiwi.com deal was found by Cheapflights users on 8/14. Clicking the “Pick Dates” 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.
lør. 9/53:40 pm -
1 stop19h 16m
man. 9/711:51 am -
2 stops22h 13m
Deal found 8/14![Frontier logo]()
$343
This Southwest deal was found by Cheapflights users on 8/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
fre. 9/118:30 am -
1 stop5h 50m
man. 9/142:55 pm -
1 stop6h 55m
Deal found 8/10![Southwest logo]()
$167
This United Airlines deal was found by Cheapflights users on 8/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lør. 9/511:00 am -
Nonstop1h 29m
søn. 9/610:37 am -
Nonstop1h 35m
Deal found 8/10![United Airlines logo]()
$228
This Southwest deal was found by Cheapflights users on 8/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
fre. 10/303:00 pm -
Nonstop1h 15m
fre. 10/306:00 pm -
1 stop5h 45m
Deal found 8/11![Southwest logo]()
$191
This United Airlines deal was found by Cheapflights users on 8/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lør. 9/196:08 am -
Nonstop1h 27m
lør. 9/1910:37 am -
Nonstop1h 35m
Deal found 8/11![United Airlines logo]()
$232
This Southwest deal was found by Cheapflights users on 8/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ons. 9/94:45 pm -
1 stop4h 35m
tir. 9/155:40 am -
2 stops7h 00m
Deal found 8/9![Southwest logo]()
$193
This Delta deal was found by Cheapflights users on 8/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lør. 8/225:05 pm -
1 stop5h 06m
tor. 8/277:18 pm -
1 stop4h 16m
Deal found 8/13![Delta logo]()
$263
This Alaska Airlines deal was found by Cheapflights users on 8/14. Clicking the “Pick Dates” 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.
man. 10/125:45 pm -
Nonstop1h 40m
tir. 10/133:32 pm -
Nonstop1h 33m
Deal found 8/14![Alaska Airlines logo]()
$267
This Southwest deal was found by Cheapflights users on 8/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ons. 9/91:10 pm -
2 stops6h 00m
ons. 9/166:50 am -
1 stop5h 50m
Deal found 8/9![Southwest logo]()
$193
This United Airlines deal was found by Cheapflights users on 8/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
tir. 9/226:08 am -
Nonstop1h 27m
tir. 9/297:00 pm -
Nonstop1h 31m
Deal found 8/13![United Airlines logo]()
$237
This Delta deal was found by Cheapflights users on 8/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
fre. 1/295:05 pm -
1 stop6h 29m
man. 2/15:20 pm -
1 stop6h 28m
Deal found 8/12![Delta logo]()
$273
This Alaska Airlines deal was found by Cheapflights users on 8/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
søn. 8/304:27 pm -
Nonstop1h 40m
tir. 9/12:09 pm -
Nonstop1h 38m
Deal found 8/10![Alaska Airlines logo]()
$282
This Southwest deal was found by Cheapflights users on 8/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
tor. 9/246:30 am -
Nonstop1h 25m
tir. 9/299:30 am -
1 stop6h 35m
Deal found 8/10![Southwest logo]()
$196
This United Airlines deal was found by Cheapflights users on 8/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lør. 9/51:56 pm -
1 stop5h 51m
søn. 9/62:27 pm -
1 stop5h 34m
Deal found 8/11![United Airlines logo]()
$240
This Southwest deal was found by Cheapflights users on 8/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lør. 10/39:40 am -
Nonstop1h 05m
man. 10/510:55 pm -
Nonstop1h 00m
Deal found 8/12![Southwest logo]()
$198
This Alaska Airlines deal was found by Cheapflights users on 8/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
tor. 9/174:27 pm -
Nonstop1h 40m
man. 9/212:09 pm -
Nonstop1h 38m
Deal found 8/10![Alaska Airlines logo]()
$307
This United Airlines deal was found by Cheapflights users on 8/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lør. 9/191:56 pm -
Nonstop1h 29m
man. 9/219:17 pm -
Nonstop1h 34m
Deal found 8/10![United Airlines logo]()
$255
This Southwest deal was found by Cheapflights users on 8/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
tir. 9/111:10 am -
Nonstop1h 15m
man. 9/76:00 am -
Nonstop1h 25m
Deal found 8/11![Southwest logo]()
$204
This Alaska Airlines deal was found by Cheapflights users on 8/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
fre. 9/114:27 pm -
Nonstop1h 40m
man. 9/142:09 pm -
Nonstop1h 38m
Deal found 8/10![Alaska Airlines logo]()
$307
This United Airlines deal was found by Cheapflights users on 8/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ons. 9/169:01 am -
Nonstop1h 29m
tor. 9/179:17 pm -
Nonstop1h 34m
Deal found 8/11![United Airlines logo]()
$255
This Delta deal was found by Cheapflights users on 8/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ons. 8/265:05 pm -
1 stop6h 47m
tor. 8/276:00 am -
1 stop6h 16m
Deal found 8/10![Delta logo]()
$348
This Southwest deal was found by Cheapflights users on 8/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
man. 9/2812:00 pm -
1 stop5h 20m
tir. 9/292:15 pm -
2 stops5h 55m
Deal found 8/10![Southwest logo]()
$206
This United Airlines deal was found by Cheapflights users on 8/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
tor. 9/109:01 am -
Nonstop1h 29m
tor. 9/174:40 pm -
Nonstop1h 31m
Deal found 8/12![United Airlines logo]()
$273
This Southwest deal was found by Cheapflights users on 8/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lør. 9/125:40 am -
Nonstop1h 05m
lør. 9/122:20 pm -
2 stops6h 35m
Deal found 8/13![Southwest logo]()
$207
This Delta deal was found by Cheapflights users on 8/14. Clicking the “Pick Dates” 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.
man. 10/56:00 pm -
1 stop5h 17m
tor. 10/156:11 am -
1 stop5h 05m
Deal found 8/14![Delta logo]()
$367
Last-minute flights from Ontario to CaliforniaDiscover last-minute flight deals from Ontario to California. Data last updated august 15, 2026 and is based on user searches.
Discover last-minute flight deals from Ontario to California. Data last updated august 15, 2026 and is based on user searches.
This Super.com deal was found by Cheapflights users on 8/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
tir. 9/13:13 pm -
Nonstop1h 27m
fre. 9/116:02 pm -
Nonstop1h 34m
Deal found 8/11![Frontier logo]()
$70
This Super.com deal was found by Cheapflights users on 8/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
tir. 9/13:13 pm -
Nonstop1h 27m
tor. 9/39:00 am -
Nonstop1h 29m
Deal found 8/12![Frontier logo]()
$73
This Super.com deal was found by Cheapflights users on 8/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ons. 9/23:13 pm -
Nonstop1h 27m
søn. 9/69:00 am -
Nonstop1h 29m
Deal found 8/13![Frontier logo]()
$80
This Kiwi.com deal was found by Cheapflights users on 8/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ons. 9/23:13 pm -
Nonstop1h 27m
fre. 9/116:02 pm -
Nonstop1h 34m
Deal found 8/13![Frontier logo]()
$82
This Southwest deal was found by Cheapflights users on 8/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lør. 9/54:40 pm -
Nonstop1h 20m
søn. 9/67:45 am -
Nonstop1h 15m
Deal found 8/12![Southwest logo]()
$109
This Kiwi.com deal was found by Cheapflights users on 8/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
søn. 9/68:48 am -
Nonstop1h 27m
fre. 9/116:02 pm -
Nonstop1h 34m
Deal found 8/13![Frontier logo]()
$77
This Frontier deal was found by Cheapflights users on 8/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
tir. 9/83:13 pm -
Nonstop1h 27m
fre. 9/116:02 pm -
Nonstop1h 34m
Deal found 8/11![Frontier logo]()
$71
This Super.com deal was found by Cheapflights users on 8/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
tor. 9/1012:07 pm -
Nonstop1h 36m
fre. 9/116:02 pm -
Nonstop1h 34m
Deal found 8/13![Frontier logo]()
$78
This Booking.com deal was found by Cheapflights users on 8/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
fre. 9/1112:07 pm -
Nonstop1h 36m
fre. 9/116:02 pm -
Nonstop1h 34m
Deal found 8/13![Frontier logo]()
$66
This Booking.com deal was found by Cheapflights users on 8/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
fre. 9/1112:07 pm -
Nonstop1h 36m
tor. 9/176:02 pm -
Nonstop1h 34m
Deal found 8/11![Frontier logo]()
$79
This Southwest deal was found by Cheapflights users on 8/14. Clicking the “Pick Dates” 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.
lør. 9/1211:00 am -
Nonstop1h 10m
lør. 9/125:00 pm -
Nonstop1h 25m
Deal found 8/14![Southwest logo]()
$117
This Kiwi.com deal was found by Cheapflights users on 8/15. Clicking the “Pick Dates” 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.
man. 9/2812:07 pm -
Nonstop1h 36m
man. 10/56:02 pm -
Nonstop1h 34m
Deal found 8/15![Frontier logo]()
$64
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 august 15, 2026.
Search for one-way flight options from Ontario to California. Find affordable one-way fares based on user searches. Data last updated august 15, 2026.
This Super.com deal was found by Cheapflights users on 8/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
tir. 9/13:13 pm -
Nonstop1h 27m
Deal found 8/12![Frontier logo]()
$28
This Trip.com deal was found by Cheapflights users on 8/14. Clicking the “Pick Dates” 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.
ons. 9/23:13 pm -
Nonstop1h 27m
Deal found 8/14![Frontier logo]()
$30
This CheapOair deal was found by Cheapflights users on 8/14. Clicking the “Pick Dates” 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.
fre. 10/3011:38 am -
Nonstop1h 34m
Deal found 8/14![Frontier logo]()
$31
This Super.com deal was found by Cheapflights users on 8/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
fre. 9/1112:07 pm -
Nonstop1h 36m
Deal found 8/11![Frontier logo]()
$33
This Kiwi.com deal was found by Cheapflights users on 8/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
tir. 9/83:13 pm -
Nonstop1h 27m
Deal found 8/13![Frontier logo]()
$36
This CheapOair deal was found by Cheapflights users on 8/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lør. 12/57:11 am -
Nonstop1h 33m
Deal found 8/11![Frontier logo]()
$45
This Southwest deal was found by Cheapflights users on 8/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lør. 9/54:40 pm -
Nonstop1h 20m
Deal found 8/11![Southwest logo]()
$50
This Booking.com deal was found by Cheapflights users on 8/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ons. 10/710:04 am -
Nonstop1h 14m
Deal found 8/9![Frontier logo]()
$59
This Southwest deal was found by Cheapflights users on 8/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
søn. 9/64:50 pm -
Nonstop1h 15m
Deal found 8/12![Southwest logo]()
$59
This Southwest deal was found by Cheapflights users on 8/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
fre. 9/118:30 am -
1 stop5h 50m
Deal found 8/13![Southwest logo]()
$60
This Flightnetwork deal was found by Cheapflights users on 8/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ons. 9/3010:04 am -
Nonstop1h 14m
Deal found 8/9![Frontier logo]()
$60
This Frontier deal was found by Cheapflights users on 8/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ons. 10/1411:16 am -
Nonstop1h 11m
Deal found 8/10![Frontier logo]()
$61
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 august 15, 2026.
Round-trip from | $66 (Booking.com) |
|---|---|
One-way from | $28 (Super.com) |
Good round-trip deal | $149 or less |
Good one-way deal | $90 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 2,558,603 searches. Data last updated august 15, 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 Jose
ONT Ontario - SJC San Jose
ONTSJC
Ontario
lør. 9/5
5:50 am-11:05 am
1 stop5h 15m
San Jose
søn. 9/6
7:45 am-9:00 am
Nonstop1h 15m
$118
OntarioSan Jose
ONT Ontario - SJC San Jose
ONTSJC
Ontario
fre. 9/18
10:55 am-12:05 pm
Nonstop1h 10m
San Jose
man. 9/21
6:30 am-7:50 am
Nonstop1h 20m
$134
OntarioSanta Rosa
ONT Ontario - STS Santa Rosa Sonoma County
ONTSTS
Ontario
tor. 10/22
5:45 pm-7:25 pm
Nonstop1h 40m
Santa Rosa Sonoma County
lør. 10/24
3:32 pm-5:05 pm
Nonstop1h 33m
$157
OntarioSanta Rosa
ONT Ontario - STS Santa Rosa Sonoma County
ONTSTS
Ontario
fre. 9/11
8:30 am-2:20 pm
1 stop5h 50m
Santa Rosa Sonoma County
man. 9/14
2:55 pm-9:50 pm
1 stop6h 55m
$167
OntarioSanta Rosa
ONT Ontario - STS Santa Rosa Sonoma County
ONTSTS
Ontario
tor. 10/22
6:00 am-10:41 am
1 stop4h 41m
Santa Rosa Sonoma County
lør. 10/24
11:21 am-4:23 pm
1 stop5h 02m
$177
OntarioSan Francisco
ONT Ontario - SFO San Francisco
ONTSFO
Ontario
ons. 10/14
8:03 am-9:30 am
Nonstop1h 27m
San Francisco
man. 10/19
7:00 pm-8:31 pm
Nonstop1h 31m
$187
OntarioOakland
ONT Ontario - OAK Oakland
ONTOAK
Ontario
fre. 10/30
3:00 pm-4:15 pm
Nonstop1h 15m
Oakland
fre. 10/30
6:00 pm-11:45 pm
1 stop5h 45m
$191
OntarioSan Francisco
ONT Ontario - SFO San Francisco
ONTSFO
Ontario
ons. 9/9
4:45 pm-9:20 pm
1 stop4h 35m
San Francisco
tir. 9/15
5:40 am-12:40 pm
2 stops7h 00m
$193
OntarioSan Francisco
ONT Ontario - SFO San Francisco
ONTSFO
Ontario
ons. 9/9
1:10 pm-7:10 pm
2 stops6h 00m
San Francisco
ons. 9/16
6:50 am-12:40 pm
1 stop5h 50m
$193
OntarioOakland
ONT Ontario - OAK Oakland
ONTOAK
Ontario
tor. 9/24
6:30 am-7:55 am
Nonstop1h 25m
Oakland
tir. 9/29
9:30 am-4:05 pm
1 stop6h 35m
$196
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-SJC
ONT-STS
ONT-SFO
ONT-RNO
ONT-OAK
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-SJC
ONT-STS
ONT-SFO
ONT-RNO
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 $169). Flying from Ontario to California in January 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 august 15, 2026.
Unlike in the morning, when flights are generally more expensive, you can save up to 19% 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 53 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 August 8, 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 august 15, 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.
Crew
8.6
Overall
8.0
Comfort
8.0
Boarding
8.1
Entertainment
7.5
Food
7.0
Reviews
1 / 20
8.0
ExcellentWalter,Aug 2025
OAK - SAN
Crew
8.6
Overall
8.0
Comfort
8.0
Boarding
8.1
Entertainment
7.5
Food
7.0
Reviews
1 / 20
8.0
ExcellentWalter,Aug 2025
OAK - SAN
Crew
8.6
Overall
8.0
Comfort
8.0
Boarding
8.1
Entertainment
7.5
Food
7.0
Reviews
1 / 20
8.0
ExcellentWalter,Aug 2025
OAK - SAN
Crew
8.6
Overall
8.0
Comfort
8.0
Boarding
8.1
Entertainment
7.5
Food
7.0
Reviews
1 / 20
8.0
ExcellentWalter,Aug 2025
OAK - SAN
Crew
8.6
Overall
8.0
Comfort
8.0
Boarding
8.1
Entertainment
7.5
Food
7.0
Reviews
1 / 20
8.0
ExcellentWalter,Aug 2025
OAK - SAN
Crew
8.6
Overall
8.0
Comfort
8.0
Boarding
8.1
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.
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Alternative routes for Ontario to California
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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 august 15, 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 2,558,603 searches. Data last updated august 15, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$29 | Average$134 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$91 | Average$167 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$94 | Average$358 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$120 | Average$188 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$138 | Average$327 | FlexibilityNo cancel fee | On-time63% |