$101+ 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 10/11. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — YYZ
May 29 — Jun 51
Round-trip
1 adult, Economy
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Find cheap flights from California to Ontario with Cheapflights
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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 April 29, 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 April 29, 2026.
This Kiwi.com deal was found by Cheapflights users on 4/26. 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 5/146:10 pm
LAS
- YYZ
1 stop8h 35m
WestJet
Sat 5/1612:40 pm
YYZ
- LAS
2 stops12h 00m
WestJet
Deal found 4/26![WestJet logo]()
$228
This Kiwi.com deal was found by Cheapflights users on 4/26. 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 5/146:10 pm
LAS
- YYZ
1 stop8h 35m
WestJet
Wed 5/206:10 am
YYZ
- LAS
2 stops14h 05m
WestJet
Deal found 4/26![WestJet logo]()
$229
This Kiwi.com deal was found by Cheapflights users on 4/26. 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.
Fri 6/126:10 pm
LAS
- YYZ
1 stop8h 35m
WestJet
Wed 6/177:00 am
YYZ
- LAS
1 stop8h 55m
WestJet
Deal found 4/26![WestJet logo]()
$230
This Kiwi.com deal was found by Cheapflights users on 4/26. 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.
Fri 5/1512:35 pm
LAS
- YYZ
Nonstop4h 25m
WestJet
Sat 5/1612:40 pm
YYZ
- LAS
2 stops12h 00m
WestJet
Deal found 4/26![WestJet logo]()
$233
This Kiwi.com deal was found by Cheapflights users on 4/26. 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.
Fri 5/1512:35 pm
LAS
- YYZ
Nonstop4h 25m
WestJet
Fri 5/229:00 am
YYZ
- LAS
1 stop11h 15m
WestJet
Deal found 4/26![WestJet logo]()
$235
This Kiwi.com deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” 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 5/284:30 pm
LAS
- YYZ
Nonstop4h 24m
Multiple Airlines
Sat 6/61:30 pm
YYZ
- LAS
1 stop11h 10m
Multiple Airlines
Deal found 4/28![Multiple Airlines logo]()
$236
This Kiwi.com deal was found by Cheapflights users on 4/26. 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.
Fri 5/1512:45 pm
LAS
- YYZ
Nonstop4h 24m
Multiple Airlines
Wed 5/206:15 am
YYZ
- LAS
1 stop9h 15m
Multiple Airlines
Deal found 4/26![Multiple Airlines logo]()
$237
This Kiwi.com deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” 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 6/127:25 pm
LAS
- YYZ
1 stop11h 20m
WestJet
Sun 6/1410:00 am
YYZ
- LAS
1 stop10h 15m
WestJet
Deal found 4/28![WestJet logo]()
$238
This Trip.com deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” 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 6/114:35 pm
LAS
- YYZ
1 stop17h 10m
WestJet
Sun 6/141:30 pm
YYZ
- LAS
1 stop11h 10m
WestJet
Deal found 4/28![WestJet logo]()
$240
This Kissandfly.com deal was found by Cheapflights users on 4/27. 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 Kissandfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/114:35 pm
LAS
- YYZ
1 stop17h 10m
WestJet
Thu 6/1810:00 am
YYZ
- LAS
1 stop10h 15m
WestJet
Deal found 4/27![WestJet logo]()
$241
This Trip.com deal was found by Cheapflights users on 4/27. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/56:10 pm
LAS
- YYZ
1 stop9h 45m
WestJet
Fri 10/97:00 am
YYZ
- LAS
1 stop8h 55m
WestJet
Deal found 4/27![WestJet logo]()
$243
This Kiwi.com deal was found by Cheapflights users on 4/24. 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.
Wed 6/173:00 pm
LAX
- YYZ
2 stops11h 10m
WestJet
Sun 6/216:15 am
YYZ
- LAX
1 stop9h 10m
WestJet
Deal found 4/24![WestJet logo]()
$264
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 April 29, 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 April 29, 2026.
This Cheapflightsfares deal was found by Cheapflights users on 4/25. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/58:30 am
LAS
- YYZ
1 stop9h 45m
WestJet
Fri 6/123:50 pm
YYZ
- LAS
1 stop8h 50m
WestJet
Deal found 4/25![WestJet logo]()
$252
This United Airlines deal was found by Cheapflights users on 4/27. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/267:10 pm
LAS
- YYZ
1 stop17h 36m
United Airlines
Tue 6/25:15 pm
YYZ
- LAS
1 stop7h 39m
United Airlines
Deal found 4/27![United Airlines logo]()
$296
This Delta deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” 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 6/115:35 am
LAX
- YYZ
1 stop8h 00m
Delta
Thu 6/185:45 pm
YYZ
- LAX
1 stop9h 01m
Delta
Deal found 4/28![Delta logo]()
$357
This United Airlines deal was found by Cheapflights users on 4/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/1512:36 am
LAS
- YYZ
1 stop6h 18m
United Airlines
Tue 6/308:50 am
YYZ
- LAS
1 stop7h 11m
United Airlines
Deal found 4/26![United Airlines logo]()
$303
This Mytrip deal was found by Cheapflights users on 4/25. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/196:45 pm
SFO
- YHM
2 stops19h 30m
Multiple Airlines
Sun 6/218:35 pm
YHM
- SFO
2 stops18h 25m
Multiple Airlines
Deal found 4/25![Multiple Airlines logo]()
$621
This United Airlines deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” 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 6/212:36 am
LAS
- YYZ
2 stops19h 08m
United Airlines
Fri 6/55:15 pm
YYZ
- LAS
1 stop7h 39m
United Airlines
Deal found 4/29![United Airlines logo]()
$303
This FlightHub deal was found by Cheapflights users on 4/24. 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.
Fri 9/253:30 pm
SAN
- YYZ
1 stop11h 15m
WestJet
Mon 10/56:35 pm
YYZ
- SAN
2 stops22h 35m
WestJet
Deal found 4/24![WestJet logo]()
$352
This United Airlines deal was found by Cheapflights users on 4/24. 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.
Mon 6/1512:36 am
LAS
- YYZ
1 stop12h 10m
United Airlines
Wed 6/175:15 pm
YYZ
- LAS
1 stop9h 38m
United Airlines
Deal found 4/24![United Airlines logo]()
$304
This Delta deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” 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 6/189:45 am
LAX
- YYZ
1 stop10h 17m
Delta
Mon 6/225:45 pm
YYZ
- LAX
1 stop9h 01m
Delta
Deal found 4/28![Delta logo]()
$368
This United Airlines deal was found by Cheapflights users on 4/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/612:36 am
LAS
- YYZ
1 stop6h 18m
United Airlines
Wed 6/1011:00 am
YYZ
- LAS
1 stop9h 58m
United Airlines
Deal found 4/26![United Airlines logo]()
$304
This Delta deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” 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 6/205:35 am
LAX
- YYZ
1 stop8h 00m
Delta
Sun 6/285:45 pm
YYZ
- LAX
1 stop9h 01m
Delta
Deal found 4/28![Delta logo]()
$379
This United Airlines deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” 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 5/2511:45 pm
LAS
- YYZ
1 stop11h 02m
United Airlines
Mon 6/19:44 am
YYZ
- LAS
1 stop15h 35m
United Airlines
Deal found 4/28![United Airlines logo]()
$306
This Trip.com deal was found by Cheapflights users on 4/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/276:00 am
SFO
- YHM
1 stop8h 15m
WestJet
Mon 6/16:10 pm
YHM
- SFO
1 stop25h 30m
WestJet
Deal found 4/24![WestJet logo]()
$410
This Delta deal was found by Cheapflights users on 4/24. 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.
Sat 6/137:15 am
LAX
- YYZ
1 stop6h 20m
Delta
Fri 6/196:14 pm
YYZ
- LAX
1 stop7h 17m
Delta
Deal found 4/24![Delta logo]()
$400
This United Airlines deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” 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 5/2511:45 pm
LAS
- YYZ
1 stop11h 02m
United Airlines
Sun 5/316:10 am
YYZ
- LAS
1 stop16h 47m
United Airlines
Deal found 4/28![United Airlines logo]()
$308
This Trip.com deal was found by Cheapflights users on 4/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/126:00 am
SFO
- YHM
1 stop8h 15m
WestJet
Tue 6/26:10 pm
YHM
- SFO
1 stop20h 50m
WestJet
Deal found 4/24![WestJet logo]()
$410
This Delta deal was found by Cheapflights users on 4/25. 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.
Tue 6/165:35 am
LAX
- YYZ
1 stop8h 00m
Delta
Sun 6/215:45 pm
YYZ
- LAX
1 stop7h 00m
Delta
Deal found 4/25![Delta logo]()
$400
This FlightHub deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” 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 5/126:00 am
SFO
- YHM
1 stop8h 15m
WestJet
Wed 5/206:10 pm
YHM
- SFO
1 stop30h 45m
WestJet
Deal found 4/28![WestJet logo]()
$438
This Delta deal was found by Cheapflights users on 4/26. 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 6/129:45 am
LAX
- YYZ
1 stop10h 17m
Delta
Sun 6/145:45 pm
YYZ
- LAX
1 stop9h 01m
Delta
Deal found 4/26![Delta logo]()
$400
This Mytrip deal was found by Cheapflights users on 4/27. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/236:05 pm
SFO
- YHM
2 stops25h 04m
Multiple Airlines
Wed 7/296:15 am
YHM
- SFO
3 stops13h 25m
Multiple Airlines
Deal found 4/27![Multiple Airlines logo]()
$652
This Delta deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” 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 6/1910:20 pm
LAX
- YYZ
1 stop9h 59m
Delta
Mon 6/296:05 am
YYZ
- LAX
1 stop11h 23m
Delta
Deal found 4/28![Delta logo]()
$406
This KAYAK deal was found by Cheapflights users on 4/24. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/26:05 pm
SFO
- YYZ
1 stop8h 40m
WestJet
Fri 6/59:00 am
YYZ
- SFO
1 stop10h 40m
WestJet
Deal found 4/24![WestJet logo]()
$468
This United Airlines deal was found by Cheapflights users on 4/25. 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.
Thu 6/256:00 am
LAX
- YYZ
1 stop7h 10m
United Airlines
Mon 6/299:00 pm
YYZ
- LAX
1 stop7h 37m
United Airlines
Deal found 4/25![United Airlines logo]()
$400
This Delta deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” 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 5/1512:15 am
SFO
- YYZ
1 stop8h 21m
Delta
Wed 5/205:45 pm
YYZ
- SFO
1 stop9h 42m
Delta
Deal found 4/28![Delta logo]()
$411
This oojo deal was found by Cheapflights users on 4/27. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/196:00 am
SFO
- YHM
1 stop8h 15m
WestJet
Mon 7/276:10 pm
YHM
- SFO
1 stop30h 45m
WestJet
Deal found 4/27![WestJet logo]()
$474
This United Airlines deal was found by Cheapflights users on 4/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/812:13 am
LAX
- YYZ
1 stop6h 41m
United Airlines
Tue 6/1610:15 am
YYZ
- LAX
1 stop9h 41m
United Airlines
Deal found 4/26![United Airlines logo]()
$400
This Mytrip deal was found by Cheapflights users on 4/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/46:00 am
SFO
- YHM
1 stop14h 13m
Multiple Airlines
Mon 6/87:55 pm
YHM
- SFO
1 stop19h 05m
Multiple Airlines
Deal found 4/24![Multiple Airlines logo]()
$726
This oojo deal was found by Cheapflights users on 4/27. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/226:00 am
SFO
- YHM
1 stop8h 15m
WestJet
Mon 7/276:10 pm
YHM
- SFO
1 stop25h 30m
WestJet
Deal found 4/27![WestJet logo]()
$474
This United Airlines deal was found by Cheapflights users on 4/27. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/812:13 am
LAX
- YYZ
1 stop6h 41m
United Airlines
Wed 6/103:53 pm
YYZ
- LAX
1 stop10h 45m
United Airlines
Deal found 4/27![United Airlines logo]()
$400
This Delta deal was found by Cheapflights users on 4/27. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/1110:00 pm
ONT
- YYZ
1 stop11h 19m
Delta
Tue 5/1911:29 am
YYZ
- ONT
1 stop10h 07m
Delta
Deal found 4/27![Delta logo]()
$456
Last-minute flights from California to OntarioDiscover last-minute flight deals from California to Ontario. Data last updated April 29, 2026 and is based on user searches.
Discover last-minute flight deals from California to Ontario. Data last updated April 29, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 4/26. 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 5/146:10 pm
LAS
- YYZ
1 stop8h 35m
WestJet
Sat 5/1612:40 pm
YYZ
- LAS
2 stops12h 00m
WestJet
Deal found 4/26![WestJet logo]()
$228
This Kiwi.com deal was found by Cheapflights users on 4/26. 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 5/146:10 pm
LAS
- YYZ
1 stop8h 35m
WestJet
Wed 5/206:10 am
YYZ
- LAS
2 stops14h 05m
WestJet
Deal found 4/26![WestJet logo]()
$229
This Trip.com deal was found by Cheapflights users on 4/26. 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 5/146:10 pm
LAS
- YYZ
1 stop8h 35m
WestJet
Mon 5/186:10 am
YYZ
- LAS
1 stop12h 35m
WestJet
Deal found 4/26![WestJet logo]()
$260
This Kiwi.com deal was found by Cheapflights users on 4/26. 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.
Fri 5/1512:35 pm
LAS
- YYZ
Nonstop4h 25m
WestJet
Sat 5/1612:40 pm
YYZ
- LAS
2 stops12h 00m
WestJet
Deal found 4/26![WestJet logo]()
$233
This Kiwi.com deal was found by Cheapflights users on 4/26. 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.
Fri 5/1512:35 pm
LAS
- YYZ
Nonstop4h 25m
WestJet
Fri 5/229:00 am
YYZ
- LAS
1 stop11h 15m
WestJet
Deal found 4/26![WestJet logo]()
$235
This Kiwi.com deal was found by Cheapflights users on 4/26. 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.
Fri 5/1512:45 pm
LAS
- YYZ
Nonstop4h 24m
Multiple Airlines
Wed 5/206:15 am
YYZ
- LAS
1 stop9h 15m
Multiple Airlines
Deal found 4/26![Multiple Airlines logo]()
$237
This Kiwi.com deal was found by Cheapflights users on 4/26. 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.
Fri 5/158:30 am
LAS
- YYZ
1 stop9h 45m
WestJet
Mon 5/186:10 am
YYZ
- LAS
1 stop12h 35m
WestJet
Deal found 4/26![WestJet logo]()
$262
This Kiwi.com deal was found by Cheapflights users on 4/27. 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.
Tue 5/266:05 pm
LAX
- YYZ
1 stop8h 40m
WestJet
Mon 6/16:10 am
YYZ
- LAX
2 stops10h 55m
WestJet
Deal found 4/27![WestJet logo]()
$273
This Kiwi.com deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” 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 5/266:05 pm
LAX
- YYZ
1 stop8h 40m
WestJet
Tue 6/26:15 am
YYZ
- LAX
1 stop9h 10m
WestJet
Deal found 4/28![WestJet logo]()
$277
This Kiwi.com deal was found by Cheapflights users on 4/27. 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.
Tue 5/266:05 pm
LAX
- YYZ
1 stop8h 40m
WestJet
Sat 5/3012:40 pm
YYZ
- LAX
2 stops12h 25m
WestJet
Deal found 4/27![WestJet logo]()
$278
This oojo deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” 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 5/276:10 pm
LAS
- YYZ
2 stops24h 00m
WestJet
Sat 6/61:30 pm
YYZ
- LAS
1 stop11h 10m
WestJet
Deal found 4/28![WestJet logo]()
$263
This Kiwi.com deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” 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 5/284:30 pm
LAS
- YYZ
Nonstop4h 24m
Multiple Airlines
Sat 6/61:30 pm
YYZ
- LAS
1 stop11h 10m
Multiple Airlines
Deal found 4/28![Multiple Airlines logo]()
$236
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 April 29, 2026.
Search for one-way flight options from California to Ontario. Find affordable one-way fares based on user searches. Data last updated April 29, 2026.
This Kiwi.com deal was found by Cheapflights users on 4/27. 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.
Sun 10/116:10 pm
LAS
- YYZ
1 stop8h 35m
WestJet
Deal found 4/27![WestJet logo]()
$101
This Mytrip deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” 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.
Tue 9/296:10 pm
LAS
- YYZ
1 stop9h 45m
WestJet
Deal found 4/28![WestJet logo]()
$102
This Booking.com deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” 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.
Sun 6/211:20 pm
LAS
- YYZ
2 stops14h 35m
WestJet
Deal found 4/28![WestJet logo]()
$103
This Justfly.com deal was found by Cheapflights users on 4/24. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/74:35 pm
LAS
- YYZ
1 stop9h 35m
WestJet
Deal found 4/24![WestJet logo]()
$104
This Justfly.com deal was found by Cheapflights users on 4/26. 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.
Sun 5/1710:05 am
LAS
- YYZ
2 stops12h 00m
WestJet
Deal found 4/26![WestJet logo]()
$105
This Justfly.com deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” 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.
Sat 5/168:30 am
LAS
- YYZ
2 stops12h 29m
WestJet
Deal found 4/29![WestJet logo]()
$106
This Mytrip deal was found by Cheapflights users on 4/26. 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.
Thu 6/181:20 pm
LAS
- YYZ
2 stops14h 35m
WestJet
Deal found 4/26![WestJet logo]()
$107
This Trip.com deal was found by Cheapflights users on 4/27. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/101:20 pm
LAS
- YYZ
1 stop24h 15m
WestJet
Deal found 4/27![WestJet logo]()
$110
This Trip.com deal was found by Cheapflights users on 4/26. 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.
Mon 5/256:00 am
ONT
- YYZ
2 stops13h 45m
Multiple Airlines
Deal found 4/26![Multiple Airlines logo]()
$127
This Trip.com deal was found by Cheapflights users on 4/27. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/2811:51 am
ONT
- YYZ
1 stop9h 03m
Multiple Airlines
Deal found 4/27![Multiple Airlines logo]()
$137
This Trip.com deal was found by Cheapflights users on 4/25. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/1311:58 am
ONT
- YYZ
2 stops14h 47m
Multiple Airlines
Deal found 4/25![Multiple Airlines logo]()
$138
This Kiwi.com deal was found by Cheapflights users on 4/24. 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.
Mon 6/1511:58 am
ONT
- YYZ
2 stops15h 57m
Multiple Airlines
Deal found 4/24![Multiple Airlines logo]()
$146
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 April 29, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $228 (Kiwi.com) |
One-way from | $101 (Kiwi.com) |
Popular in | December |
Cheapest in | September |
Average price | $405 |
Good round-trip deal | $267 or less |
Good one-way deal | $239 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 April 29, 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
Fri 6/5
8:30 am-9:15 pm
1 stop9h 45m
Toronto Pearson Intl
Fri 6/12
3:50 pm-9:40 pm
1 stop8h 50m
$252
Las VegasToronto
LAS - YYZ
LASYYZ
Las Vegas Harry Reid Intl
Tue 5/26
7:10 pm-3:46 pm
1 stop17h 36m
Toronto Pearson Intl
Tue 6/2
5:15 pm-9:54 pm
1 stop7h 39m
$296
Quickest round-trip
Las VegasToronto
LAS - YYZ
LASYYZ
Las Vegas Harry Reid Intl
Mon 6/15
12:36 am-9:54 am
1 stop6h 18m
Toronto Pearson Intl
Tue 6/30
8:50 am-1:01 pm
1 stop7h 11m
$303
Las VegasToronto
LAS - YYZ
LASYYZ
Las Vegas Harry Reid Intl
Tue 6/2
12:36 am-10:44 pm
2 stops19h 08m
Toronto Pearson Intl
Fri 6/5
5:15 pm-9:54 pm
1 stop7h 39m
$303
Las VegasToronto
LAS - YYZ
LASYYZ
Las Vegas Harry Reid Intl
Mon 6/15
12:36 am-3:46 pm
1 stop12h 10m
Toronto Pearson Intl
Wed 6/17
5:15 pm-11:53 pm
1 stop9h 38m
$304
Las VegasToronto
LAS - YYZ
LASYYZ
Las Vegas Harry Reid Intl
Sat 6/6
12:36 am-9:54 am
1 stop6h 18m
Toronto Pearson Intl
Wed 6/10
11:00 am-5:58 pm
1 stop9h 58m
$304
Las VegasToronto
LAS - YYZ
LASYYZ
Las Vegas Harry Reid Intl
Mon 5/25
11:45 pm-1:47 pm
1 stop11h 02m
Toronto Pearson Intl
Mon 6/1
9:44 am-10:19 pm
1 stop15h 35m
$306
Las VegasToronto
LAS - YYZ
LASYYZ
Las Vegas Harry Reid Intl
Mon 5/25
11:45 pm-1:47 pm
1 stop11h 02m
Toronto Pearson Intl
Sun 5/31
6:10 am-7:57 pm
1 stop16h 47m
$308
San DiegoToronto
SAN - YYZ
SANYYZ
San Diego
Fri 9/25
3:30 pm-5:45 am
1 stop11h 15m
Toronto Pearson Intl
Mon 10/5
6:35 pm-2:10 pm
2 stops22h 35m
$352
Los AngelesToronto
LAX - YYZ
LAXYYZ
Los Angeles Los Angeles
Thu 6/11
5:35 am-4:35 pm
1 stop8h 00m
Toronto Pearson Intl
Thu 6/18
5:45 pm-11:46 pm
1 stop9h 01m
$357
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.
LAS-YYZ
LAX-YYZ
ONT-YYZ
LAX-YTZ
LAX-YUL
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
LAS-YYZ
LAX-YYZ
ONT-YYZ
LAX-YTZ
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 77 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 month to book a flight from California to Region of Ontario?
Currently, September is the cheapest month in which you can book a flight from California to Region of Ontario (average of $352). Flying from California to Region of Ontario in December is currently the most expensive (average of $703). 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 April 29, 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 39% on your trip compared to booking a flight in the evening.
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 April 25, 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.
How much does it cost to fly round-trip from California to Region of Ontario?
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 April 29, 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.
Food
7.6
Overall
8.0
Comfort
8.0
Crew
8.6
Boarding
8.2
Entertainment
7.0
Reviews
1 / 20
10.0
ExcellentJohn,Mar 2026
YYZ - PVR
Food
7.6
Overall
8.0
Comfort
8.0
Crew
8.6
Boarding
8.2
Entertainment
7.0
Reviews
1 / 20
10.0
ExcellentJohn,Mar 2026
YYZ - PVR
Food
7.6
Overall
8.0
Comfort
8.0
Crew
8.6
Boarding
8.2
Entertainment
7.0
Reviews
1 / 20
10.0
ExcellentJohn,Mar 2026
YYZ - PVR
Food
7.6
Overall
8.0
Comfort
8.0
Crew
8.6
Boarding
8.2
Entertainment
7.0
Reviews
1 / 20
10.0
ExcellentJohn,Mar 2026
YYZ - PVR
Food
7.6
Overall
8.0
Comfort
8.0
Crew
8.6
Boarding
8.2
Entertainment
7.0
Reviews
1 / 20
10.0
ExcellentJohn,Mar 2026
YYZ - PVR
Food
7.6
Overall
8.0
Comfort
8.0
Crew
8.6
Boarding
8.2
Entertainment
7.0
Reviews
1 / 20
10.0
ExcellentJohn,Mar 2026
YYZ - PVR
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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Complete your trip
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Popular flights
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Top destinations
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 April 29, 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 April 29, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$100 | Average$347 | FlexibilityNo cancel fee | On-time60% | |
| Cheapest$108 | Average$369 | FlexibilityNo cancel fee | On-time52% | |
| Cheapest$114 | Average$423 | FlexibilityNo cancel fee | On-time50% | |
| Cheapest$122 | Average$601 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$130 | Average$460 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$153 | Average$585 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$267 | Average$579 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$293 | Average$432 | FlexibilityNo cancel fee | On-time68% |