$33+ 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 10/19. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — LAX
Sep 24 — Oct 11
Round-trip
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
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
Cheapest
Best
Last-minute
One-way
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 25, 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 25, 2026.
This Super.com deal was found by Cheapflights users on 8/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/1112:07 pm -
Nonstop1h 36m
Fri 9/186:02 pm -
Nonstop1h 34m
Deal found 8/20![Frontier logo]()
$60
This Booking.com deal was found by Cheapflights users on 8/23. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/212:07 pm -
Nonstop1h 36m
Fri 10/26:02 pm -
Nonstop1h 34m
Deal found 8/23![Frontier logo]()
$61
This Kiwi.com deal was found by Cheapflights users on 8/21. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/2212:01 pm -
Nonstop1h 31m
Thu 10/226:02 pm -
Nonstop1h 38m
Deal found 8/21![Frontier logo]()
$63
This Kiwi.com deal was found by Cheapflights users on 8/22. 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.
Fri 9/1112:07 pm -
Nonstop1h 36m
Mon 9/146:02 pm -
Nonstop1h 34m
Deal found 8/22![Frontier logo]()
$65
This Super.com deal was found by Cheapflights users on 8/23. 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.
Thu 9/1712:07 pm -
Nonstop1h 36m
Mon 9/216:02 pm -
Nonstop1h 34m
Deal found 8/23![Frontier logo]()
$66
This Booking.com deal was found by Cheapflights users on 8/21. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/2412:07 pm -
Nonstop1h 36m
Mon 9/286:02 pm -
Nonstop1h 34m
Deal found 8/21![Frontier logo]()
$67
This Kiwi.com deal was found by Cheapflights users on 8/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/1012:07 pm -
Nonstop1h 36m
Mon 9/146:02 pm -
Nonstop1h 34m
Deal found 8/20![Frontier logo]()
$68
This Kiwi.com deal was found by Cheapflights users on 8/23. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/1512:01 pm -
Nonstop1h 31m
Thu 10/226:02 pm -
Nonstop1h 38m
Deal found 8/23![Frontier logo]()
$71
This Southwest deal was found by Cheapflights users on 8/24. 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.
Tue 10/66:20 am -
Nonstop1h 15m
Tue 10/67:30 pm -
Nonstop1h 20m
Deal found 8/24![Southwest logo]()
$117
This Frontier deal was found by Cheapflights users on 8/25. 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.
Mon 9/218:00 am -
1 stop4h 43m
Thu 9/2410:47 pm -
1 stop8h 17m
Deal found 8/25![Frontier logo]()
$118
This Trip.com deal was found by Cheapflights users on 8/21. 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 10/65:44 pm -
Nonstop1h 20m
Fri 10/910:03 am -
Nonstop1h 13m
Deal found 8/21![Frontier logo]()
$119
This Frontier deal was found by Cheapflights users on 8/25. 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.
Thu 9/178:00 am -
1 stop13h 52m
Mon 9/211:38 pm -
1 stop19h 31m
Deal found 8/25![Frontier logo]()
$119
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 25, 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 25, 2026.
This Southwest deal was found by Cheapflights users on 8/24. 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 10/166:00 am -
Nonstop1h 15m
Mon 10/196:45 am -
Nonstop1h 20m
Deal found 8/24![Southwest logo]()
$134
This United Airlines deal was found by Cheapflights users on 8/23. 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 10/229:25 am -
Nonstop1h 29m
Tue 10/274:35 pm -
Nonstop1h 26m
Deal found 8/23![United Airlines logo]()
$187
This Delta deal was found by Cheapflights users on 8/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/306:00 am -
1 stop4h 41m
Sun 11/14:49 pm -
1 stop5h 22m
Deal found 8/20![Delta logo]()
$257
This Southwest deal was found by Cheapflights users on 8/21. 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 9/303:35 pm -
2 stops5h 45m
Thu 10/16:45 am -
1 stop4h 40m
Deal found 8/21![Southwest logo]()
$156
This Alaska Airlines deal was found by Cheapflights users on 8/22. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/305:45 pm -
Nonstop1h 40m
Sun 11/13:09 pm -
Nonstop1h 30m
Deal found 8/22![Alaska Airlines logo]()
$317
This Southwest deal was found by Cheapflights users on 8/25. 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 10/35:30 am -
2 stops5h 35m
Mon 10/55:15 pm -
1 stop5h 00m
Deal found 8/25![Southwest logo]()
$159
This United Airlines deal was found by Cheapflights users on 8/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/241:52 pm -
Nonstop1h 29m
Sat 9/264:15 pm -
Nonstop1h 31m
Deal found 8/20![United Airlines logo]()
$187
This United Airlines deal was found by Cheapflights users on 8/22. 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.
Sat 9/261:52 pm -
Nonstop1h 29m
Tue 9/298:40 am -
Nonstop1h 43m
Deal found 8/22![United Airlines logo]()
$187
This Southwest deal was found by Cheapflights users on 8/21. 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.
Fri 10/231:05 pm -
2 stops8h 00m
Mon 10/2610:45 pm -
1 stop9h 05m
Deal found 8/21![Southwest logo]()
$172
This United Airlines deal was found by Cheapflights users on 8/25. 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.
Tue 10/138:03 am -
Nonstop1h 27m
Tue 10/208:40 am -
Nonstop1h 43m
Deal found 8/25![United Airlines logo]()
$187
This Southwest deal was found by Cheapflights users on 8/24. 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.
Mon 9/215:45 pm -
1 stop4h 40m
Mon 9/288:10 pm -
Nonstop1h 20m
Deal found 8/24![Southwest logo]()
$186
This United Airlines deal was found by Cheapflights users on 8/24. 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.
Thu 10/299:25 am -
Nonstop1h 30m
Tue 11/36:50 pm -
Nonstop1h 25m
Deal found 8/24![United Airlines logo]()
$187
This United Airlines deal was found by Cheapflights users on 8/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/81:52 pm -
Nonstop1h 29m
Mon 10/1210:43 am -
Nonstop1h 35m
Deal found 8/20![United Airlines logo]()
$188
This Southwest deal was found by Cheapflights users on 8/21. 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.
Thu 9/244:10 pm -
Nonstop1h 25m
Tue 9/2911:50 am -
Nonstop1h 20m
Deal found 8/21![Southwest logo]()
$197
This Alaska Airlines deal was found by Cheapflights users on 8/22. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/245:45 pm -
Nonstop1h 40m
Wed 10/287:00 am -
1 stop11h 00m
Deal found 8/22![Alaska Airlines logo]()
$325
This United Airlines deal was found by Cheapflights users on 8/23. 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 9/229:01 am -
Nonstop1h 29m
Fri 9/259:25 pm -
Nonstop1h 34m
Deal found 8/23![United Airlines logo]()
$204
This Southwest deal was found by Cheapflights users on 8/25. 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 10/37:20 am -
Nonstop1h 35m
Mon 10/54:15 pm -
Nonstop1h 20m
Deal found 8/25![Southwest logo]()
$204
This Delta deal was found by Cheapflights users on 8/24. 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 2/195:05 pm -
1 stop6h 40m
Sun 3/146:00 am -
1 stop6h 30m
Deal found 8/24![Delta logo]()
$344
This United Airlines deal was found by Cheapflights users on 8/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/91:52 pm -
Nonstop1h 29m
Mon 10/129:25 pm -
Nonstop1h 26m
Deal found 8/20![United Airlines logo]()
$204
This Southwest deal was found by Cheapflights users on 8/22. 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.
Sat 9/265:40 am -
2 stops6h 15m
Tue 9/2912:55 pm -
2 stops5h 30m
Deal found 8/22![Southwest logo]()
$207
This Alaska Airlines deal was found by Cheapflights users on 8/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/24:50 pm -
2 stops29h 06m
Fri 10/93:32 pm -
Nonstop1h 33m
Deal found 8/20![Alaska Airlines logo]()
$340
This Delta deal was found by Cheapflights users on 8/21. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/195:15 pm -
1 stop4h 42m
Mon 9/216:00 am -
1 stop6h 14m
Deal found 8/21![Delta logo]()
$363
This Southwest deal was found by Cheapflights users on 8/21. 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.
Sat 10/38:55 am -
2 stops8h 05m
Sat 10/37:35 pm -
Nonstop1h 05m
Deal found 8/21![Southwest logo]()
$212
This Alaska Airlines deal was found by Cheapflights users on 8/25. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/225:45 pm -
2 stops17h 25m
Tue 10/277:10 pm -
2 stops21h 55m
Deal found 8/25![Alaska Airlines logo]()
$366
This Delta deal was found by Cheapflights users on 8/25. 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.
Sun 9/276:00 am -
1 stop6h 46m
Mon 10/512:22 pm -
1 stop4h 57m
Deal found 8/25![Delta logo]()
$367
This Southwest deal was found by Cheapflights users on 8/24. 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.
Thu 10/85:20 am -
2 stops6h 00m
Mon 10/1210:45 pm -
1 stop9h 05m
Deal found 8/24![Southwest logo]()
$214
This Delta deal was found by Cheapflights users on 8/23. 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.
Sat 11/76:01 pm -
1 stop5h 17m
Wed 11/116:04 am -
1 stop5h 13m
Deal found 8/23![Delta logo]()
$367
This Priceline deal was found by Cheapflights users on 8/25. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/277:12 am -
1 stop4h 46m
Sat 10/310:33 am -
1 stop7h 27m
Deal found 8/25![Alaska Airlines logo]()
$367
This Southwest deal was found by Cheapflights users on 8/25. 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 9/195:40 am -
1 stop4h 20m
Mon 9/216:00 am -
Nonstop1h 25m
Deal found 8/25![Southwest logo]()
$214
This United Airlines deal was found by Cheapflights users on 8/25. 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 9/196:08 am -
1 stop3h 25m
Wed 9/236:30 am -
1 stop5h 42m
Deal found 8/25![United Airlines logo]()
$267
Last-minute flights from Ontario to CaliforniaDiscover last-minute flight deals from Ontario to California. Data last updated August 25, 2026 and is based on user searches.
Discover last-minute flight deals from Ontario to California. Data last updated August 25, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 8/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/1012:07 pm -
Nonstop1h 36m
Mon 9/146:02 pm -
Nonstop1h 34m
Deal found 8/20![Frontier logo]()
$68
This Super.com deal was found by Cheapflights users on 8/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/1112:07 pm -
Nonstop1h 36m
Fri 9/186:02 pm -
Nonstop1h 34m
Deal found 8/20![Frontier logo]()
$60
This Kiwi.com deal was found by Cheapflights users on 8/22. 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.
Fri 9/1112:07 pm -
Nonstop1h 36m
Mon 9/146:02 pm -
Nonstop1h 34m
Deal found 8/22![Frontier logo]()
$65
This Booking.com deal was found by Cheapflights users on 8/23. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/1412:07 pm -
Nonstop1h 36m
Wed 9/1611:17 am -
1 stop5h 42m
Deal found 8/23![Frontier logo]()
$83
This Super.com deal was found by Cheapflights users on 8/24. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/1412:07 pm -
Nonstop1h 36m
Thu 9/246:02 pm -
Nonstop1h 34m
Deal found 8/24![Frontier logo]()
$84
This Southwest deal was found by Cheapflights users on 8/21. 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.
Tue 9/151:15 pm -
Nonstop1h 15m
Thu 9/176:30 am -
Nonstop1h 20m
Deal found 8/21![Southwest logo]()
$117
This Super.com deal was found by Cheapflights users on 8/23. 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.
Thu 9/1712:07 pm -
Nonstop1h 36m
Mon 9/216:02 pm -
Nonstop1h 34m
Deal found 8/23![Frontier logo]()
$66
This Frontier deal was found by Cheapflights users on 8/25. 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.
Thu 9/178:00 am -
1 stop13h 52m
Mon 9/211:38 pm -
1 stop19h 31m
Deal found 8/25![Frontier logo]()
$119
This Booking.com deal was found by Cheapflights users on 8/24. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/1812:07 pm -
Nonstop1h 36m
Mon 9/216:02 pm -
Nonstop1h 34m
Deal found 8/24![Frontier logo]()
$73
This Frontier deal was found by Cheapflights users on 8/25. 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.
Mon 9/218:00 am -
1 stop4h 43m
Thu 9/2410:47 pm -
1 stop8h 17m
Deal found 8/25![Frontier logo]()
$118
This Trip.com deal was found by Cheapflights users on 8/23. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/225:44 pm -
Nonstop1h 20m
Fri 9/256:00 am -
Nonstop1h 04m
Deal found 8/23![Frontier logo]()
$120
This Booking.com deal was found by Cheapflights users on 8/21. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/2412:07 pm -
Nonstop1h 36m
Mon 9/286:02 pm -
Nonstop1h 34m
Deal found 8/21![Frontier logo]()
$67
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 25, 2026.
Search for one-way flight options from Ontario to California. Find affordable one-way fares based on user searches. Data last updated August 25, 2026.
This Kiwi.com deal was found by Cheapflights users on 8/21. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/1912:01 pm -
Nonstop1h 31m
Deal found 8/21![Frontier logo]()
$33
This Kiwi.com deal was found by Cheapflights users on 8/25. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/2312:01 pm -
Nonstop1h 31m
Deal found 8/25![Frontier logo]()
$39
This Booking.com deal was found by Cheapflights users on 8/24. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/2812:07 pm -
Nonstop1h 36m
Deal found 8/24![Frontier logo]()
$43
This Jetabroad deal was found by Cheapflights users on 8/25. 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 Jetabroad is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/97:11 am -
Nonstop1h 33m
Deal found 8/25![Frontier logo]()
$44
This CheapOair deal was found by Cheapflights users on 8/24. 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.
Thu 12/37:11 am -
Nonstop1h 33m
Deal found 8/24![Frontier logo]()
$45
This Super.com deal was found by Cheapflights users on 8/24. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/1912:01 pm -
Nonstop1h 35m
Deal found 8/24![Frontier logo]()
$46
This Frontier deal was found by Cheapflights users on 8/23. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/212:01 pm -
Nonstop1h 35m
Deal found 8/23![Frontier logo]()
$47
This Frontier deal was found by Cheapflights users on 8/23. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/1712:07 pm -
Nonstop1h 36m
Deal found 8/23![Frontier logo]()
$53
This Super.com deal was found by Cheapflights users on 8/24. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/1710:04 am -
1 stop4h 21m
Deal found 8/24![Frontier logo]()
$58
This Super.com deal was found by Cheapflights users on 8/24. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/178:00 am -
1 stop4h 43m
Deal found 8/24![Frontier logo]()
$58
This United Airlines deal was found by Cheapflights users on 8/25. 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.
Tue 9/221:56 pm -
Nonstop1h 29m
Deal found 8/25![United Airlines logo]()
$59
This Southwest deal was found by Cheapflights users on 8/24. 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.
Thu 9/246:00 am -
Nonstop1h 15m
Deal found 8/24![Southwest logo]()
$59
Find flight deals from Ontario to California
Keep the following information in mind while searching for Ontario to California flight deals. Data was last updated August 25, 2026.
Round-trip from | $61 (Booking.com) |
|---|---|
One-way from | $33 (Kiwi.com) |
Good round-trip deal | $162 or less |
Good one-way deal | $58 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 August 25, 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
Fri 10/16
6:00 am-7:15 am
Nonstop1h 15m
San Jose
Mon 10/19
6:45 am-8:05 am
Nonstop1h 20m
$134
OntarioSan Francisco
ONT Ontario - SFO San Francisco
ONTSFO
Ontario
Wed 9/30
3:35 pm-9:20 pm
2 stops5h 45m
San Francisco
Thu 10/1
6:45 am-11:25 am
1 stop4h 40m
$156
OntarioSan Jose
ONT Ontario - SJC San Jose
ONTSJC
Ontario
Sat 10/3
5:30 am-11:05 am
2 stops5h 35m
San Jose
Mon 10/5
5:15 pm-10:15 pm
1 stop5h 00m
$159
OntarioSan Francisco
ONT Ontario - SFO San Francisco
ONTSFO
Ontario
Fri 10/23
1:05 pm-9:05 pm
2 stops8h 00m
San Francisco
Mon 10/26
10:45 pm-7:50 am
1 stop9h 05m
$172
OntarioSan Jose
ONT Ontario - SJC San Jose
ONTSJC
Ontario
Mon 9/21
5:45 pm-10:25 pm
1 stop4h 40m
San Jose
Mon 9/28
8:10 pm-9:30 pm
Nonstop1h 20m
$186
OntarioSan Francisco
ONT Ontario - SFO San Francisco
ONTSFO
Ontario
Thu 10/22
9:25 am-10:54 am
Nonstop1h 29m
San Francisco
Tue 10/27
4:35 pm-6:01 pm
Nonstop1h 26m
$187
OntarioSan Francisco
ONT Ontario - SFO San Francisco
ONTSFO
Ontario
Thu 9/24
1:52 pm-3:21 pm
Nonstop1h 29m
San Francisco
Sat 9/26
4:15 pm-5:46 pm
Nonstop1h 31m
$187
OntarioSan Francisco
ONT Ontario - SFO San Francisco
ONTSFO
Ontario
Sat 9/26
1:52 pm-3:21 pm
Nonstop1h 29m
San Francisco
Tue 9/29
8:40 am-10:23 am
Nonstop1h 43m
$187
OntarioSan Francisco
ONT Ontario - SFO San Francisco
ONTSFO
Ontario
Tue 10/13
8:03 am-9:30 am
Nonstop1h 27m
San Francisco
Tue 10/20
8:40 am-10:23 am
Nonstop1h 43m
$187
OntarioSan Francisco
ONT Ontario - SFO San Francisco
ONTSFO
Ontario
Thu 10/29
9:25 am-10:55 am
Nonstop1h 30m
San Francisco
Tue 11/3
6:50 pm-8:15 pm
Nonstop1h 25m
$187
Showing 1-10 of 60 resultsSorted by cheapest first
Best time to book a flight from Ontario to California
Have a flexible travel schedule? Discover the best time to fly to California from Ontario with our price prediction graph.
ONT-SFO
ONT-SJC
ONT-LAS
ONT-STS
ONT-SMF
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from Ontario to California
ONT-USCA
ONT-SFO
ONT-SJC
ONT-LAS
ONT-STS
What is the cheapest month to book a flight from Ontario to California?
Currently, October is the cheapest month in which you can book a flight from Ontario to California (average of $166). Flying from Ontario to California in February is currently the most expensive (average of $321). 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 25, 2026.
Unlike in the morning, when flights are generally more expensive, you can save up to 17% 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 August 22, 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 25, 2026.
Get a feel of what it's like to fly with Southwest,Alaska Airlines, andUnited Airlines from Ontario to California by reading reviews from past customers. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Boarding
8.1
Overall
8.0
Comfort
8.0
Entertainment
7.5
Food
7.0
Crew
8.6
Reviews
1 / 20
8.0
ExcellentWalter,Aug 2025
OAK - SAN
Boarding
8.1
Overall
8.0
Comfort
8.0
Entertainment
7.5
Food
7.0
Crew
8.6
Reviews
1 / 20
8.0
ExcellentWalter,Aug 2025
OAK - SAN
Boarding
8.1
Overall
8.0
Comfort
8.0
Entertainment
7.5
Food
7.0
Crew
8.6
Reviews
1 / 20
8.0
ExcellentWalter,Aug 2025
OAK - SAN
Boarding
8.1
Overall
8.0
Comfort
8.0
Entertainment
7.5
Food
7.0
Crew
8.6
Reviews
1 / 20
8.0
ExcellentWalter,Aug 2025
OAK - SAN
Boarding
8.1
Overall
8.0
Comfort
8.0
Entertainment
7.5
Food
7.0
Crew
8.6
Reviews
1 / 20
8.0
ExcellentWalter,Aug 2025
OAK - SAN
Boarding
8.1
Overall
8.0
Comfort
8.0
Entertainment
7.5
Food
7.0
Crew
8.6
Reviews
1 / 20
8.0
ExcellentWalter,Aug 2025
OAK - SAN
Related info for your journey
Find useful and relevant information for your journey from Ontario to California. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Browse thousands of different options on Cheapflights for your next trip
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
Alternative routes
Complete your trip
Flights by cabin class
Other flight options
Popular flights
Top destinations
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 August 25, 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 August 25, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$29 | Average$141 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$91 | Average$167 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$96 | Average$307 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$120 | Average$188 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$136 | Average$327 | FlexibilityNo cancel fee | On-time63% |