$152+ Cheap flights from California to Ontario
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 9/22. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — YYZ
Aug 26 — Sep 21
Round-trip
1 adult, Economy
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Find cheap flights from California to Ontario with Cheapflights
1. Tell us where you want to go
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Cheapest flights from California to OntarioExplore the most affordable flight options available from California to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 27, 2026.
Explore the most affordable flight options available from California to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 27, 2026.
This Trip.com deal was found by Cheapflights users on 7/23. 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.
Thu 10/88:30 am
LAS
- YYZ
2 stops10h 05m
WestJet
Mon 10/128:00 am
YYZ
- LAS
2 stops12h 15m
WestJet
Deal found 7/23![WestJet logo]()
$276
This Kiwi.com deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/1511:20 pm
LAS
- YYZ
Nonstop4h 19m
Multiple Airlines
Mon 10/198:00 am
YYZ
- LAS
2 stops12h 15m
Multiple Airlines
Deal found 7/24![Multiple Airlines logo]()
$281
This Kiwi.com deal was found by Cheapflights users on 7/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/138:30 am
LAS
- YYZ
2 stops10h 05m
WestJet
Mon 9/2812:40 pm
YYZ
- LAS
1 stop8h 50m
WestJet
Deal found 7/26![WestJet logo]()
$282
This Kiwi.com deal was found by Cheapflights users on 7/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/108:30 am
LAS
- YYZ
2 stops10h 05m
Multiple Airlines
Sun 9/138:35 pm
YYZ
- LAS
Nonstop4h 47m
Multiple Airlines
Deal found 7/26![Multiple Airlines logo]()
$283
This Traveloka deal was found by Cheapflights users on 7/24. 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 Traveloka is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/89:45 am
LAS
- YYZ
Nonstop4h 24m
Multiple Airlines
Tue 9/158:00 am
YYZ
- LAS
2 stops12h 15m
Multiple Airlines
Deal found 7/24![Multiple Airlines logo]()
$284
This Trip.com deal was found by Cheapflights users on 7/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/108:30 am
LAS
- YYZ
2 stops10h 05m
WestJet
Tue 9/158:00 am
YYZ
- LAS
2 stops12h 15m
WestJet
Deal found 7/26![WestJet logo]()
$286
This Trip.com deal was found by Cheapflights users on 7/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/511:20 pm
LAS
- YYZ
Nonstop4h 19m
Porter Airlines
Fri 9/118:35 pm
YYZ
- LAS
Nonstop4h 47m
Porter Airlines
Deal found 7/26![Porter Airlines logo]()
$287
This Kiwi.com deal was found by Cheapflights users on 7/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/149:45 am
LAS
- YYZ
Nonstop4h 24m
Multiple Airlines
Tue 9/228:00 am
YYZ
- LAS
2 stops12h 15m
Multiple Airlines
Deal found 7/26![Multiple Airlines logo]()
$288
This Kiwi.com deal was found by Cheapflights users on 7/25. 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.
Tue 9/89:45 am
LAS
- YYZ
Nonstop4h 24m
Multiple Airlines
Thu 9/1012:40 pm
YYZ
- LAS
2 stops12h 00m
Multiple Airlines
Deal found 7/25![Multiple Airlines logo]()
$289
This Kiwi.com deal was found by Cheapflights users on 7/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/149:45 am
LAS
- YYZ
Nonstop4h 24m
Multiple Airlines
Mon 9/2812:40 pm
YYZ
- LAS
1 stop8h 50m
Multiple Airlines
Deal found 7/26![Multiple Airlines logo]()
$290
This Booking.com deal was found by Cheapflights users on 7/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/811:25 pm
LAS
- YYZ
Nonstop4h 19m
Air Canada
Fri 9/118:35 pm
YYZ
- LAS
Nonstop4h 47m
Air Canada
Deal found 7/26![Air Canada logo]()
$291
This Kiwi.com deal was found by Cheapflights users on 7/23. 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 10/156:00 am
SFO
- YYZ
2 stops12h 35m
WestJet
Sun 10/183:50 pm
YYZ
- SFO
1 stop9h 05m
WestJet
Deal found 7/23![WestJet logo]()
$299
Best flights from California to OntarioDiscover carefully curated flight deals from California to Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 27, 2026.
Discover carefully curated flight deals from California to Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 27, 2026.
This United deal was found by Cheapflights users on 7/23. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/1211:50 pm
LAS
- YYZ
1 stop12h 56m
Multiple Airlines
Wed 10/288:40 pm
YYZ
- LAS
Nonstop5h 07m
Multiple Airlines
Deal found 7/23![Multiple Airlines logo]()
$343
This United Airlines deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/2011:58 pm
LAS
- YYZ
1 stop13h 49m
United Airlines
Mon 11/2310:53 am
YYZ
- LAS
1 stop10h 33m
United Airlines
Deal found 7/24![United Airlines logo]()
$345
This Porter Airlines deal was found by Cheapflights users on 7/22. 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 Porter Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/209:40 am
LAS
- YYZ
1 stop8h 00m
Porter Airlines
Mon 11/238:30 pm
YYZ
- LAS
Nonstop5h 07m
Porter Airlines
Deal found 7/22![Porter Airlines logo]()
$345
This Justfly.com deal was found by Cheapflights users on 7/22. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/144:30 pm
LAS
- YYZ
2 stops14h 15m
WestJet
Thu 9/178:00 am
YYZ
- LAS
2 stops12h 15m
WestJet
Deal found 7/22![WestJet logo]()
$354
This Delta deal was found by Cheapflights users on 7/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/256:00 am
LAX
- YYZ
1 stop7h 39m
Delta
Thu 11/55:49 pm
YYZ
- LAX
1 stop6h 56m
Delta
Deal found 7/23![Delta logo]()
$469
This Alaska Airlines deal was found by Cheapflights users on 7/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/66:43 pm
SAN
- YYZ
2 stops18h 22m
Alaska Airlines
Sun 11/85:15 pm
YYZ
- SAN
2 stops22h 12m
Alaska Airlines
Deal found 7/26![Alaska Airlines logo]()
$591
This United Airlines deal was found by Cheapflights users on 7/23. 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.
Mon 10/1211:59 pm
LAS
- YYZ
1 stop8h 44m
United Airlines
Mon 10/195:27 pm
YYZ
- LAS
1 stop7h 46m
United Airlines
Deal found 7/23![United Airlines logo]()
$371
This FlightHub deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/276:10 pm
LAS
- YYZ
2 stops10h 50m
WestJet
Sat 8/297:00 am
YYZ
- LAS
1 stop13h 15m
WestJet
Deal found 7/22![WestJet logo]()
$433
This Mytrip deal was found by Cheapflights users on 7/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/136:05 pm
LAX
- YHM
3 stops20h 30m
Multiple Airlines
Sat 9/196:05 am
YHM
- LAX
3 stops19h 00m
Multiple Airlines
Deal found 7/26![Multiple Airlines logo]()
$436
This Justfly.com deal was found by Cheapflights users on 7/23. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/297:30 am
LAX
- YKF
1 stop9h 20m
WestJet
Wed 10/78:40 pm
YKF
- LAX
1 stop23h 30m
WestJet
Deal found 7/23![WestJet logo]()
$441
This Delta deal was found by Cheapflights users on 7/24. 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 8/2810:00 pm
SFO
- YYZ
1 stop11h 23m
Delta
Thu 9/106:10 am
YYZ
- SFO
1 stop9h 10m
Delta
Deal found 7/24![Delta logo]()
$494
This Porter Airlines deal was found by Cheapflights users on 7/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Porter Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/151:20 pm
SFO
- YYZ
Nonstop5h 05m
Porter Airlines
Sat 9/199:45 am
YYZ
- SFO
Nonstop5h 35m
Porter Airlines
Deal found 7/26![Porter Airlines logo]()
$501
This United deal was found by Cheapflights users on 7/25. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/212:15 pm
LAX
- YYZ
1 stop6h 44m
Multiple Airlines
Mon 9/218:30 am
YYZ
- LAX
Nonstop5h 04m
Multiple Airlines
Deal found 7/25![Multiple Airlines logo]()
$466
This United Airlines deal was found by Cheapflights users on 7/25. 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 10/136:00 am
LAX
- YYZ
1 stop7h 14m
United Airlines
Wed 10/218:50 am
YYZ
- LAX
1 stop7h 16m
United Airlines
Deal found 7/25![United Airlines logo]()
$474
This Delta deal was found by Cheapflights users on 7/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/69:59 am
LAS
- YYZ
1 stop10h 04m
Delta
Tue 8/186:15 am
YYZ
- LAS
1 stop9h 23m
Delta
Deal found 7/26![Delta logo]()
$499
This Porter Airlines deal was found by Cheapflights users on 7/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Porter Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/191:20 pm
SFO
- YUL
1 stop8h 17m
Porter Airlines
Wed 10/286:45 am
YUL
- SFO
1 stop9h 00m
Porter Airlines
Deal found 7/26![Porter Airlines logo]()
$503
This United deal was found by Cheapflights users on 7/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/210:53 am
LAX
- YYZ
1 stop7h 39m
Multiple Airlines
Sun 9/66:35 pm
YYZ
- LAX
Nonstop5h 18m
Multiple Airlines
Deal found 7/26![Multiple Airlines logo]()
$466
This Justfly.com deal was found by Cheapflights users on 7/22. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/198:30 am
LAS
- YYZ
1 stop8h 35m
WestJet
Mon 10/1910:30 pm
YYZ
- LAS
1 stop17h 00m
WestJet
Deal found 7/22![WestJet logo]()
$495
This United deal was found by Cheapflights users on 7/24. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/216:45 pm
LAX
- YYZ
1 stop9h 15m
Multiple Airlines
Wed 9/238:30 am
YYZ
- LAX
Nonstop5h 04m
Multiple Airlines
Deal found 7/24![Multiple Airlines logo]()
$467
This Delta deal was found by Cheapflights users on 7/25. 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.
Fri 8/216:00 am
LAX
- YYZ
1 stop12h 59m
Delta
Fri 8/286:10 am
YYZ
- LAX
1 stop11h 24m
Delta
Deal found 7/25![Delta logo]()
$517
This United Airlines deal was found by Cheapflights users on 7/23. 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.
Mon 10/510:51 pm
SFO
- YYZ
Nonstop5h 09m
United Airlines
Fri 10/96:30 am
YYZ
- SFO
Nonstop5h 38m
United Airlines
Deal found 7/23![United Airlines logo]()
$537
This Porter Airlines deal was found by Cheapflights users on 7/24. 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 Porter Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/302:20 pm
LAX
- YUL
1 stop7h 17m
Porter Airlines
Tue 10/66:45 am
YUL
- LAX
1 stop9h 35m
Porter Airlines
Deal found 7/24![Porter Airlines logo]()
$565
This oojo deal was found by Cheapflights users on 7/24. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/184:55 pm
LAX
- YKF
2 stops23h 55m
WestJet
Thu 9/248:40 pm
YKF
- LAX
2 stops22h 20m
WestJet
Deal found 7/24![WestJet logo]()
$514
This United Airlines deal was found by Cheapflights users on 7/23. 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.
Wed 8/2610:51 pm
SFO
- YYZ
Nonstop5h 09m
United Airlines
Thu 9/36:30 am
YYZ
- SFO
Nonstop5h 38m
United Airlines
Deal found 7/23![United Airlines logo]()
$537
This United deal was found by Cheapflights users on 7/23. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/196:00 am
LAS
- YYZ
1 stop6h 46m
Multiple Airlines
Mon 10/198:35 pm
YYZ
- LAS
Nonstop4h 47m
Multiple Airlines
Deal found 7/23![Multiple Airlines logo]()
$500
This Delta deal was found by Cheapflights users on 7/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/49:50 pm
LAX
- YYZ
1 stop11h 33m
Delta
Thu 9/105:54 pm
YYZ
- LAX
1 stop7h 16m
Delta
Deal found 7/26![Delta logo]()
$573
This oojo deal was found by Cheapflights users on 7/25. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/231:15 pm
LAX
- YHM
1 stop25h 00m
WestJet
Wed 9/306:10 pm
YHM
- LAX
1 stop30h 55m
WestJet
Deal found 7/25![WestJet logo]()
$551
This United deal was found by Cheapflights users on 7/24. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/2812:40 pm
LAX
- YYZ
1 stop8h 19m
Multiple Airlines
Sun 8/308:30 am
YYZ
- LAX
Nonstop5h 00m
Multiple Airlines
Deal found 7/24![Multiple Airlines logo]()
$502
This United Airlines deal was found by Cheapflights users on 7/22. 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.
Fri 11/208:10 am
SFO
- YYZ
Nonstop4h 58m
United Airlines
Fri 11/274:10 pm
YYZ
- SFO
1 stop8h 05m
United Airlines
Deal found 7/22![United Airlines logo]()
$553
This Delta deal was found by Cheapflights users on 7/23. 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.
Wed 10/286:00 am
ONT
- YYZ
1 stop7h 39m
Delta
Fri 10/3012:05 pm
YYZ
- ONT
2 stops26h 03m
Delta
Deal found 7/23![Delta logo]()
$581
Last-minute flights from California to OntarioDiscover last-minute flight deals from California to Ontario. Data last updated July 27, 2026 and is based on user searches.
Discover last-minute flight deals from California to Ontario. Data last updated July 27, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 7/23. 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.
Sun 8/96:00 am
SFO
- YYZ
1 stop9h 55m
WestJet
Wed 8/196:00 am
YYZ
- SFO
1 stop9h 00m
WestJet
Deal found 7/23![WestJet logo]()
$307
This Justfly.com deal was found by Cheapflights users on 7/25. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/121:00 pm
SFO
- YYZ
2 stops13h 10m
WestJet
Wed 8/1912:40 pm
YYZ
- SFO
2 stops12h 15m
WestJet
Deal found 7/25![WestJet logo]()
$302
This Kiwi.com deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/121:00 pm
SFO
- YYZ
2 stops13h 10m
WestJet
Thu 8/202:50 pm
YYZ
- SFO
1 stop10h 05m
WestJet
Deal found 7/27![WestJet logo]()
$304
This Kiwi.com deal was found by Cheapflights users on 7/25. 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.
Thu 8/136:00 am
SFO
- YYZ
2 stops12h 10m
WestJet
Sat 8/222:50 pm
YYZ
- SFO
1 stop10h 05m
WestJet
Deal found 7/25![WestJet logo]()
$300
This Kiwi.com deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/136:00 am
SFO
- YYZ
2 stops12h 10m
WestJet
Wed 8/193:50 pm
YYZ
- SFO
1 stop9h 05m
WestJet
Deal found 7/24![WestJet logo]()
$303
This Kiwi.com deal was found by Cheapflights users on 7/23. 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 8/136:00 am
SFO
- YYZ
2 stops12h 10m
WestJet
Fri 8/2110:00 am
YYZ
- SFO
1 stop9h 40m
WestJet
Deal found 7/23![WestJet logo]()
$306
This FlightHub deal was found by Cheapflights users on 7/24. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/186:00 am
SFO
- YYZ
2 stops10h 55m
WestJet
Wed 8/1912:40 pm
YYZ
- SFO
2 stops12h 15m
WestJet
Deal found 7/24![WestJet logo]()
$308
This Kiwi.com deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/196:00 am
SFO
- YYZ
2 stops10h 00m
WestJet
Wed 9/1610:50 am
YYZ
- SFO
1 stop8h 50m
WestJet
Deal found 7/22![WestJet logo]()
$311
This Kiwi.com deal was found by Cheapflights users on 7/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/236:00 am
SFO
- YYZ
1 stop9h 55m
WestJet
Sun 8/309:00 am
YYZ
- SFO
1 stop10h 40m
WestJet
Deal found 7/26![WestJet logo]()
$301
This FlightHub deal was found by Cheapflights users on 7/25. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/236:00 am
SFO
- YYZ
1 stop9h 55m
WestJet
Fri 8/282:50 pm
YYZ
- SFO
1 stop10h 05m
WestJet
Deal found 7/25![WestJet logo]()
$309
This Justfly.com deal was found by Cheapflights users on 7/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/256:00 am
SFO
- YYZ
1 stop9h 55m
WestJet
Sat 8/296:00 am
YYZ
- SFO
1 stop9h 00m
WestJet
Deal found 7/26![WestJet logo]()
$310
This Kiwi.com deal was found by Cheapflights users on 7/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/2512:57 am
LAS
- YYZ
2 stops17h 58m
Multiple Airlines
Tue 9/88:35 pm
YYZ
- LAS
Nonstop4h 47m
Multiple Airlines
Deal found 7/26![Multiple Airlines logo]()
$333
One-way flights from California to OntarioSearch for one-way flight options from California to Ontario. Find affordable one-way fares based on user searches. Data last updated July 27, 2026.
Search for one-way flight options from California to Ontario. Find affordable one-way fares based on user searches. Data last updated July 27, 2026.
This Air Canada deal was found by Cheapflights users on 7/22. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/226:00 pm
LAS
- YYZ
1 stop8h 23m
Air Canada
Deal found 7/22![Air Canada logo]()
$152
This Justfly.com deal was found by Cheapflights users on 7/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/208:00 am
LAS
- YYZ
2 stops11h 43m
WestJet
Deal found 7/26![WestJet logo]()
$153
This Flysmarter deal was found by Cheapflights users on 7/24. 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 Flysmarter is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/236:50 am
LAS
- YYZ
2 stops14h 01m
Air Canada
Deal found 7/24![Air Canada logo]()
$154
This United Airlines deal was found by Cheapflights users on 7/22. 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 9/1912:11 pm
LAS
- YYZ
1 stop7h 25m
United Airlines
Deal found 7/22![United Airlines logo]()
$155
This Air Canada deal was found by Cheapflights users on 7/22. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/1911:25 pm
LAS
- YYZ
1 stop8h 08m
Air Canada
Deal found 7/22![Air Canada logo]()
$156
This Delta deal was found by Cheapflights users on 7/25. 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.
Sat 9/2612:40 am
LAS
- YYZ
1 stop7h 55m
Delta
Deal found 7/25![Delta logo]()
$157
This Kiwi.com deal was found by Cheapflights users on 7/22. 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.
Mon 9/284:30 pm
LAS
- YYZ
2 stops14h 15m
WestJet
Deal found 7/22![WestJet logo]()
$158
This Kiwi.com deal was found by Cheapflights users on 7/22. 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.
Tue 9/221:45 pm
LAS
- YYZ
2 stops12h 25m
WestJet
Deal found 7/22![WestJet logo]()
$159
This Kiwi.com deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/249:30 pm
LAS
- YYZ
3 stops21h 05m
Multiple Airlines
Deal found 7/24![Multiple Airlines logo]()
$160
This United Airlines deal was found by Cheapflights users on 7/23. 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.
Wed 9/236:00 am
LAS
- YYZ
2 stops11h 44m
United Airlines
Deal found 7/23![United Airlines logo]()
$162
This Kiwi.com deal was found by Cheapflights users on 7/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/197:56 pm
ONT
- YYZ
2 stops22h 59m
Multiple Airlines
Deal found 7/26![Multiple Airlines logo]()
$163
This Kiwi.com deal was found by Cheapflights users on 7/22. 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.
Tue 9/17:56 pm
ONT
- YYZ
2 stops22h 59m
Multiple Airlines
Deal found 7/22![Multiple Airlines logo]()
$164
Find flight deals from California to Ontario
Keep the following information in mind while searching for California to Ontario flight deals. Data was last updated July 27, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $276 (Trip.com) |
One-way from | $152 (Air Canada) |
Popular in | July |
Cheapest in | October |
Average price | $590 |
Good round-trip deal | $414 or less |
Good one-way deal | $246 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from California to Ontario 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 July 27, 2026.
Use the filters below to find and compare flights from California to Ontario that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
Las VegasToronto
LAS - YYZ
LASYYZ
Las Vegas Harry Reid Intl
Mon 10/12
11:50 pm-3:46 pm
1 stop12h 56m
Toronto Pearson Intl
Wed 10/28
8:40 pm-10:47 pm
Nonstop5h 07m
$343
Las VegasToronto
LAS - YYZ
LASYYZ
Las Vegas Harry Reid Intl
Fri 11/20
11:58 pm-4:47 pm
1 stop13h 49m
Toronto Pearson Intl
Mon 11/23
10:53 am-6:26 pm
1 stop10h 33m
$345
Las VegasToronto
LAS - YYZ
LASYYZ
Las Vegas Harry Reid Intl
Fri 11/20
9:40 am-8:40 pm
1 stop8h 00m
Toronto Pearson Intl
Mon 11/23
8:30 pm-10:37 pm
Nonstop5h 07m
$345
Las VegasToronto
LAS - YYZ
LASYYZ
Las Vegas Harry Reid Intl
Mon 9/14
4:30 pm-9:45 am
2 stops14h 15m
Toronto Pearson Intl
Thu 9/17
8:00 am-5:15 pm
2 stops12h 15m
$354
Las VegasToronto
LAS - YYZ
LASYYZ
Las Vegas Harry Reid Intl
Mon 10/12
11:59 pm-11:43 am
1 stop8h 44m
Toronto Pearson Intl
Mon 10/19
5:27 pm-10:13 pm
1 stop7h 46m
$371
Las VegasToronto
LAS - YYZ
LASYYZ
Las Vegas Harry Reid Intl
Thu 8/27
6:10 pm-8:00 am
2 stops10h 50m
Toronto Pearson Intl
Sat 8/29
7:00 am-5:15 pm
1 stop13h 15m
$433
Los AngelesHamilton
LAX - YHM
LAXYHM
Los Angeles
Sun 9/13
6:05 pm-5:35 pm
3 stops20h 30m
Hamilton
Sat 9/19
6:05 am-10:05 pm
3 stops19h 00m
$436
Los AngelesToronto
LAX - YKF
LAXYKF
Los Angeles
Tue 9/29
7:30 am-7:50 pm
1 stop9h 20m
Toronto Region of Waterloo Intl
Wed 10/7
8:40 pm-5:10 pm
1 stop23h 30m
$441
Los AngelesToronto
LAX - YYZ
LAXYYZ
Los Angeles
Fri 8/21
2:15 pm-11:59 pm
1 stop6h 44m
Toronto Pearson Intl
Mon 9/21
8:30 am-10:34 am
Nonstop5h 04m
$466
Los AngelesToronto
LAX - YYZ
LAXYYZ
Los Angeles
Wed 9/2
10:53 am-9:32 pm
1 stop7h 39m
Toronto Pearson Intl
Sun 9/6
6:35 pm-8:53 pm
Nonstop5h 18m
$466
Showing 1-10 of 60 resultsSorted by cheapest first
Best time to book a flight from California to Ontario
Have a flexible travel schedule? Discover the best time to fly to Ontario from California with our price prediction graph.
SFO-YYZ
LAS-YYZ
ONT-YYZ
LAX-YHM
SAN-YYZ
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 California to Ontario
USCA-CAON
SFO-YYZ
LAS-YYZ
ONT-YYZ
LAX-YHM
What is the cheapest month to book a flight from California to Region of Ontario?
Currently, February is the cheapest month in which you can book a flight from California to Region of Ontario (average of $395). Flying from California to Region of Ontario in December is currently the most expensive (average of $582). 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 CA to ON?
Find hourly flight availability from California to Ontario. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated July 27, 2026.
A simple way to save on the total cost of your ticket is to fly from California to Region of Ontario at noon. If you’re flexible enough to do this you can expect to save up to 31% on your trip compared to booking a flight in the evening.
Weekly flight availability from California to Region of Ontario
Explore weekly flight availability from California to Ontario. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated July 27, 2026.
The most flights from USCA to CAON are scheduled on a Saturday (21 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (16 on average).
How much does it cost to fly round-trip from California to Region of Ontario?
Airfare is typical for this route at the moment.
California to Region of Ontario flights typically cost between $289 and $617 in October.The cheapest round-trip price found within the last 5 days was $324 on WestJet (Oct 23-Oct 30).
How far ahead should I book a flight from California to Region of Ontario?
The best time to book flights from California to Region of Ontario is 30 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.
What is the cheapest day to fly from California to Region of Ontario?
Use this chart to determine the cheapest time to fly round-trip from California to Ontario. Price data was last updated on July 18, 2026.
Travelers seeking maximum savings on their California to Region of Ontario flight should consider departing on Sunday evenings when fares are most often at their lowest. Sunday mornings flights should be avoided if possible as fares are typically the most expensive at this time.
Reviews of airlines servicing Ontario
Get insights into the airlines that provide service to Ontario. 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 Ontario. Reviews last updated July 27, 2026.
Get a feel of what it's like to fly with Porter Airlines,Delta, andUnited Airlines from California to Ontario by reading reviews from past customers. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Boarding
8.2
Comfort
8.0
Entertainment
6.9
Crew
8.6
Food
7.5
Overall
8.0
Reviews
1 / 20
6.0
GoodShannon,Jul 2026
YQT - YOW
Boarding
8.2
Comfort
8.0
Entertainment
6.9
Crew
8.6
Food
7.5
Overall
8.0
Reviews
1 / 20
6.0
GoodShannon,Jul 2026
YQT - YOW
Boarding
8.2
Comfort
8.0
Entertainment
6.9
Crew
8.6
Food
7.5
Overall
8.0
Reviews
1 / 20
6.0
GoodShannon,Jul 2026
YQT - YOW
Boarding
8.2
Comfort
8.0
Entertainment
6.9
Crew
8.6
Food
7.5
Overall
8.0
Reviews
1 / 20
6.0
GoodShannon,Jul 2026
YQT - YOW
Boarding
8.2
Comfort
8.0
Entertainment
6.9
Crew
8.6
Food
7.5
Overall
8.0
Reviews
1 / 20
6.0
GoodShannon,Jul 2026
YQT - YOW
Boarding
8.2
Comfort
8.0
Entertainment
6.9
Crew
8.6
Food
7.5
Overall
8.0
Reviews
1 / 20
6.0
GoodShannon,Jul 2026
YQT - YOW
Related info for your journey
Find useful and relevant information for your journey from California to Ontario. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Browse thousands of different options on Cheapflights for your next trip
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
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Alternative routes for California to Ontario
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to Ontario by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from California to Ontario by cabin class
Find flights from California to Ontario, based on your preferred cabin class, be it economy, premium economy, business, or first class.
California and Ontario flights
Browse other California and Ontario flight options. Last updated on July 27, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Find a return flight route from Ontario
Find the right flight back to California after your stay in Ontario
California to Ontario flights
Consider these flights traveling from California to Ontario.
Top 8 airlines flying from California to Ontario
Discover the top 8 airlines that operate flights from California to Ontario. 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 July 27, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$113 | Average$488 | FlexibilityNo cancel fee | On-time60% | |
| Cheapest$142 | Average$493 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$148 | Average$454 | FlexibilityNo cancel fee | On-time52% | |
| Cheapest$150 | Average$443 | FlexibilityNo cancel fee | On-time50% | |
| Cheapest$174 | Average$669 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$177 | Average$668 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$293 | Average$430 | FlexibilityNo cancel fee | On-time68% | |
| Cheapest$346 | Average$613 | FlexibilityNo cancel fee | On-time71% |