Cheap flights from California to Ontario from C$ 89
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 17/6. Fares are subject to change and may not be available on all flights or dates of travel.
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 30 April 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 30 April 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 30 April 2025.
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 30 April 2025.
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
Price
Los AngelesToronto
LAX - YYZ
LAXYYZ
Los Angeles
Sun 17/8
7:00 a.m.-6:54 p.m.
1 stop8h 54m
Toronto Pearson Intl
Sat 23/8
7:45 p.m.-10:10 p.m.
Nonstop5h 25m
Las VegasToronto
LAS - YYZ
LASYYZ
Las Vegas Harry Reid Intl
Fri 16/5
9:55 a.m.-5:20 p.m.
Nonstop4h 25m
Toronto Pearson Intl
Tue 20/5
1:50 p.m.-3:43 p.m.
Nonstop4h 53m
Las VegasToronto
LAS - YYZ
LASYYZ
Las Vegas Harry Reid Intl
Mon 12/5
11:30 p.m.-6:49 a.m.
Nonstop4h 19m
Toronto Pearson Intl
Tue 20/5
7:00 a.m.-8:53 a.m.
Nonstop4h 53m
Las VegasToronto
LAS - YYZ
LASYYZ
Las Vegas Harry Reid Intl
Wed 11/6
8:00 a.m.-12:33 a.m.
2 stops13h 33m
Toronto Pearson Intl
Wed 18/6
10:00 a.m.-5:35 p.m.
1 stop10h 35m
Las VegasToronto
LAS - YYZ
LASYYZ
Las Vegas Harry Reid Intl
Fri 16/5
11:20 p.m.-11:39 a.m.
1 stop9h 19m
Toronto Pearson Intl
Sun 25/5
4:00 p.m.-10:19 p.m.
1 stop9h 19m
Los AngelesToronto
LAX - YYZ
LAXYYZ
Los Angeles
Tue 27/5
11:40 a.m.-10:56 p.m.
1 stop8h 16m
Toronto Pearson Intl
Tue 3/6
9:45 a.m.-12:10 p.m.
Nonstop5h 25m
Los AngelesMontreal
LAX - YUL
LAXYUL
Los Angeles
Fri 11/7
2:00 p.m.-12:37 a.m.
1 stop7h 37m
Montreal Pierre Elliott Trudeau Intl
Tue 22/7
7:00 a.m.-8:23 p.m.
2 stops16h 23m
Los AngelesMontreal
LAX - YUL
LAXYUL
Los Angeles
Fri 11/7
2:00 p.m.-12:37 a.m.
1 stop7h 37m
Montreal Pierre Elliott Trudeau Intl
Mon 21/7
6:45 a.m.-1:00 p.m.
1 stop9h 15m
Las VegasToronto
LAS - YYZ
LASYYZ
Las Vegas Harry Reid Intl
Thu 15/5
12:59 a.m.-11:34 a.m.
1 stop7h 35m
Toronto Pearson Intl
Tue 20/5
8:45 a.m.-12:59 p.m.
1 stop7h 14m
San FranciscoToronto
SFO - YYZ
SFOYYZ
San Francisco
Wed 4/6
10:15 a.m.-1:39 p.m.
1 stop24h 24m
Toronto Pearson Intl
Sun 8/6
6:30 a.m.-9:30 a.m.
1 stop30h 00m
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.
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 30 April 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.
Rainfall in Ontario by month
Plan your trip to Ontario by taking into account the average rainfall totals by month.
In terms of precipitation, rainfall in Region of Ontario ranges from 51.0 - 83.0 mm per month. June is typically the wettest month, when rainfall can reach 83.0 mm. February is typically the driest time to visit Region of Ontario when rainfall is around 51.0 mm.
Temperature in Ontario by month
Plan your trip to Ontario by taking into account the average temperature totals by month.
If weather is an important factor for your trip to Region of Ontario, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 21.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around -6.0 C).
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 30 April 2025.
Read reviews from past customers who have flown Delta, Alaska Airlines and Porter Airlines from California to Ontario. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Overall
Crew
Food
Boarding
Comfort
Entertainment
Reviews
Aaron,Oct 2024
LAX - LHR
Overall
Crew
Food
Boarding
Comfort
Entertainment
Reviews
Aaron,Oct 2024
LAX - LHR
Overall
Crew
Food
Boarding
Comfort
Entertainment
Reviews
Aaron,Oct 2024
LAX - LHR
Overall
Crew
Food
Boarding
Comfort
Entertainment
Reviews
Aaron,Oct 2024
LAX - LHR
Overall
Crew
Food
Boarding
Comfort
Entertainment
Reviews
Aaron,Oct 2024
LAX - LHR
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 30 April 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.