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Cheap flights from California to Ontario from C$ 112
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 2/10. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — YYZ
3 Aug — 10 Aug1
Round-trip
1 adult
Economy
Cheap flight deals from California to Ontario
Keep the following information in mind while searching for California to Ontario flight deals. Data was last updated 29 July 2025.
Find flight deals from California to Ontario
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 29 July 2025.
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 29 July 2025.
Sun 7/911:10 p.m.LAX - YYZ
Nonstop4h 49mWestJet
Mon 8/910:00 a.m.YYZ - LAX
2 stops11h 54mWestJet
Deal found 27/7C$ 222
Thu 4/97:25 a.m.LAS - YYZ
1 stop8h 51mAir Canada
Wed 10/94:00 p.m.YYZ - LAS
1 stop9h 59mAir Canada
Deal found 29/7C$ 236
Sat 6/911:30 a.m.LAS - YYZ
1 stop8h 22mWestJet
Thu 11/99:45 a.m.YYZ - LAS
Nonstop4h 54mWestJet
Deal found 27/7C$ 247
Wed 27/86:20 p.m.LAS - YYZ
1 stop8h 52mMultiple Airlines
Tue 2/99:30 a.m.YYZ - LAS
Nonstop4h 45mMultiple Airlines
Deal found 27/7C$ 254
Fri 5/911:40 a.m.LAX - YYZ
1 stop9h 42mMultiple Airlines
Sat 6/910:40 a.m.YYZ - LAX
Nonstop5h 20mMultiple Airlines
Deal found 27/7C$ 257
Fri 5/92:00 p.m.LAX - YYZ
Nonstop4h 50mPorter Airlines
Sat 6/910:40 a.m.YYZ - LAX
Nonstop5h 20mPorter Airlines
Deal found 27/7C$ 287
Wed 13/810:55 p.m.LAS - YYZ
Nonstop4h 25mPorter Airlines
Wed 27/88:05 p.m.YYZ - LAS
Nonstop4h 50mPorter Airlines
Deal found 28/7C$ 307
Wed 10/910:30 p.m.LAX - YTZ
1 stop10h 15mAir Canada
Wed 17/910:20 a.m.YTZ - LAX
2 stops14h 15mAir Canada
Deal found 26/7C$ 318
Thu 18/910:15 a.m.SFO - YYZ
1 stop16h 58mMultiple Airlines
Mon 22/910:25 p.m.YYZ - SFO
1 stop14h 05mMultiple Airlines
Deal found 27/7C$ 322
Thu 16/1010:15 a.m.SFO - YYZ
1 stop18h 00mFlair Airlines
Tue 21/109:00 p.m.YYZ - SFO
1 stop15h 30mFlair Airlines
Deal found 27/7C$ 332
Wed 10/98:33 a.m.OAK - YYZ
1 stop8h 12mMultiple Airlines
Wed 17/92:00 p.m.YYZ - OAK
2 stops12h 32mMultiple Airlines
Deal found 27/7C$ 351
Tue 19/86:00 a.m.SJC - YYZ
2 stops21h 12mMultiple Airlines
Thu 28/89:45 a.m.YYZ - SJC
1 stop10h 47mMultiple Airlines
Deal found 27/7C$ 368
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 629,999 searches. Data last updated 29 July 2025.
Use the filters below to find and compare flights from California to Ontario that are best for you.
Fly from
California
Fly to
Ontario
Route
Depart
Return
Price
Los AngelesToronto
LAX - YYZ
LAXYYZ
Los Angeles
Sun 7/9
11:10 p.m.-6:59 a.m.
Nonstop4h 49m
Toronto Pearson Intl
Mon 8/9
10:00 a.m.-6:54 p.m.
2 stops11h 54m
C$ 222
Los AngelesToronto
LAX - YYZ
LAXYYZ
Los Angeles
Thu 25/9
7:00 a.m.-9:01 p.m.
2 stops11h 01m
Toronto Pearson Intl
Sat 27/9
10:40 a.m.-1:00 p.m.
Nonstop5h 20m
C$ 241
Los AngelesToronto
LAX - YYZ
LAXYYZ
Los Angeles
Sat 6/9
10:30 p.m.-10:39 a.m.
1 stop9h 09m
Toronto Pearson Intl
Sat 13/9
6:35 p.m.-8:53 p.m.
Nonstop5h 18m
C$ 244
Las VegasToronto
LAS - YYZ
LASYYZ
Las Vegas Harry Reid Intl
Tue 30/9
4:50 p.m.-6:01 a.m.
1 stop10h 11m
Toronto Pearson Intl
Wed 1/10
9:25 a.m.-11:08 a.m.
Nonstop4h 43m
C$ 246
Las VegasToronto
LAS - YYZ
LASYYZ
Las Vegas Harry Reid Intl
Sat 6/9
11:30 a.m.-10:52 p.m.
1 stop8h 22m
Toronto Pearson Intl
Thu 11/9
9:45 a.m.-11:39 a.m.
Nonstop4h 54m
C$ 247
Las VegasToronto
LAS - YYZ
LASYYZ
Las Vegas Harry Reid Intl
Wed 27/8
6:20 p.m.-6:12 a.m.
1 stop8h 52m
Toronto Pearson Intl
Tue 2/9
9:30 a.m.-11:15 a.m.
Nonstop4h 45m
C$ 254
Los AngelesToronto
LAX - YYZ
LAXYYZ
Los Angeles
Fri 5/9
2:00 p.m.-9:50 p.m.
Nonstop4h 50m
Toronto Pearson Intl
Sat 6/9
10:40 a.m.-1:00 p.m.
Nonstop5h 20m
C$ 287
Las VegasToronto
LAS - YYZ
LASYYZ
Las Vegas Harry Reid Intl
Wed 13/8
10:55 p.m.-6:20 a.m.
Nonstop4h 25m
Toronto Pearson Intl
Wed 27/8
8:05 p.m.-9:55 p.m.
Nonstop4h 50m
C$ 307
Los AngelesToronto
LAX - YTZ
LAXYTZ
Los Angeles
Wed 10/9
10:30 p.m.-11:45 a.m.
1 stop10h 15m
Toronto Island
Wed 17/9
10:20 a.m.-9:35 p.m.
2 stops14h 15m
C$ 318
San FranciscoToronto
SFO - YYZ
SFOYYZ
San Francisco
Thu 18/9
10:15 a.m.-6:13 a.m.
1 stop16h 58m
Toronto Pearson Intl
Mon 22/9
10:25 p.m.-9:30 a.m.
1 stop14h 05m
C$ 322
Showing 1-10 of 60 results
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.
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
What is the cheapest month to book a flight from California to Region of Ontario?
Currently, January is the cheapest month in which you can book a flight from California to Region of Ontario (average of C$ 167). Flying from California to Region of Ontario in July is currently the most expensive (average of C$ 258). 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 29 July 2025.
Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from California to Region of Ontario as you normally would.
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 29 July 2025.
The most flights from USCA to CAON are scheduled on a Sunday (23 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (11 on average).
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 29 July 2025.
See what other customers who have flown with Alaska Airlines,Porter Airlines, andDelta from California to Ontario have to say. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Comfort
7.8
Boarding
8.1
Overall
8.0
Entertainment
7.1
Food
7.1
Crew
8.5
Reviews
1 / 20
10.0
ExcellentJonathan,Jul 2025
SEA - BOS
Comfort
7.8
Boarding
8.1
Overall
8.0
Entertainment
7.1
Food
7.1
Crew
8.5
Reviews
1 / 20
10.0
ExcellentJonathan,Jul 2025
SEA - BOS
Comfort
7.8
Boarding
8.1
Overall
8.0
Entertainment
7.1
Food
7.1
Crew
8.5
Reviews
1 / 20
10.0
ExcellentJonathan,Jul 2025
SEA - BOS
Comfort
7.8
Boarding
8.1
Overall
8.0
Entertainment
7.1
Food
7.1
Crew
8.5
Reviews
1 / 20
10.0
ExcellentJonathan,Jul 2025
SEA - BOS
Comfort
7.8
Boarding
8.1
Overall
8.0
Entertainment
7.1
Food
7.1
Crew
8.5
Reviews
1 / 20
10.0
ExcellentJonathan,Jul 2025
SEA - BOS
Comfort
7.8
Boarding
8.1
Overall
8.0
Entertainment
7.1
Food
7.1
Crew
8.5
Reviews
1 / 20
10.0
ExcellentJonathan,Jul 2025
SEA - BOS
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
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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.
Top 5 airlines flying from California to Ontario
Discover the top 5 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 629,999 searches. Data last updated 29 July 2025.
Fly with Cheapflights
Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.
How does Cheapflights help users find flights from California to Ontario?
900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to Ontario from California today with Cheapflights!
Why should you use Cheapflights to find cheap flight tickets from California to Ontario?
Cheapflights helps you find that perfect flight to Ontario from California by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!
Can Cheapflights find flights from California to Ontario with no change fees?
Certainly. Search results for flights to Ontario from California shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.
Can Cheapflights notify me if prices for flights from California to Ontario become cheaper?
Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Ontario from California today and book when prices fit your budget.