HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
California

$113+ Cheap flights from Ontario to California

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 12/2. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — LAX
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Ontario to California with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Ontario to California

Keep the following information in mind while searching for Ontario to California flight deals. Data was last updated September 11, 2025.

Round-trip from

$168
(Kiwi.com)

One-way from

$113
(Air Canada)

Popular in

December

Cheapest in

September

Average price

$236

Good round-trip deal

$207 or less

Good one-way deal

$167 or less
From Ontario to California
Search Deals
One-way flight from Ontario to California
Search Deals
Highest demand for flights based on searches. 9% potential increase in price ($32 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($12 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in September 2025
Search Deals
Price to beat on a round-trip flight from Ontario to California.
Search Deals
Price to beat on a one-way flight from Ontario to California.
Search Deals

Find flight deals from Ontario to California

Cheapest flights from Ontario to California
Explore the most affordable flight options available from Ontario to California. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 11, 2025.

This Kiwi.com deal was found by Cheapflights users on 9/10. 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 9/223:00 pmYYZ - LAX
1 stop9h 46mWestJet
Thu 9/257:00 amLAX - YYZ
2 stops11h 01mWestJet
Deal found 9/10$168
This FlightHub deal was found by Cheapflights users on 9/11. 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 9/267:45 pmYYZ - LAX
Nonstop5h 26mWestJet
Thu 10/27:00 amLAX - YYZ
2 stops11h 01mWestJet
Deal found 9/11$169
This oojo deal was found by Cheapflights users on 9/10. 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 10/158:00 amYYZ - LAX
2 stops13h 09mWestJet
Fri 10/177:00 amLAX - YYZ
2 stops14h 31mWestJet
Deal found 9/10$170
This Kiwi.com deal was found by Cheapflights users on 9/11. 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 9/2910:00 amYYZ - LAX
2 stops11h 54mWestJet
Fri 10/36:05 pmLAX - YYZ
1 stop9h 07mWestJet
Deal found 9/11$171
This Kiwi.com deal was found by Cheapflights users on 9/9. 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 9/108:00 amYYZ - LAX
2 stops15h 21mWestJet
Wed 10/17:00 amLAX - YYZ
1 stop8h 52mWestJet
Deal found 9/9$172
This Trip.com deal was found by Cheapflights users on 9/9. 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.
Fri 9/123:00 pmYYZ - LAX
1 stop9h 46mWestJet
Wed 9/177:00 amLAX - YYZ
2 stops14h 31mWestJet
Deal found 9/9$173
This FlightHub deal was found by Cheapflights users on 9/9. 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.
Sat 9/2012:00 pmYYZ - LAX
2 stops12h 46mWestJet
Sat 9/276:05 pmLAX - YYZ
1 stop9h 07mWestJet
Deal found 9/9$174
This Kiwi.com deal was found by Cheapflights users on 9/11. 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 9/2812:00 pmYYZ - LAX
1 stop11h 21mWestJet
Thu 10/26:05 pmLAX - YYZ
1 stop9h 07mWestJet
Deal found 9/11$175
This Kiwi.com deal was found by Cheapflights users on 9/10. 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 11/210:00 amYYZ - LAX
Nonstop5h 39mMultiple Airlines
Fri 11/75:45 pmLAX - YYZ
1 stop9h 28mMultiple Airlines
Deal found 9/10$176
This oojo deal was found by Cheapflights users on 9/10. 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 9/1912:00 pmYYZ - LAX
2 stops12h 46mWestJet
Mon 9/226:05 pmLAX - YYZ
1 stop9h 47mWestJet
Deal found 9/10$177
This FlightHub deal was found by Cheapflights users on 9/9. 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 10/178:05 pmYYZ - LAS
Nonstop4h 50mMultiple Airlines
Sun 10/199:10 pmLAS - YYZ
1 stop16h 28mMultiple Airlines
Deal found 9/9$177
This FlightHub deal was found by Cheapflights users on 9/11. 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 10/236:30 amYYZ - LAS
2 stops11h 31mWestJet
Fri 10/2412:35 pmLAS - YYZ
Nonstop4h 23mWestJet
Deal found 9/11$178

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ontario to California that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated September 11, 2025.
Use the filters below to find and compare flights from Ontario to California that are best for you.

Fly from

Ontario

Fly to

California

Route

Depart

Return

Price

TorontoLas Vegas

YTZ - LAS

YTZLAS

Toronto Island

Fri 10/24

5:25 pm-10:22 pm

1 stop7h 57m

Las Vegas Harry Reid Intl

Tue 10/28

9:10 am-9:35 pm

1 stop9h 25m

$182

TorontoLas Vegas

YYZ - LAS

YYZLAS

Toronto Pearson Intl

Sat 10/18

10:05 am-9:59 pm

1 stop14h 54m

Las Vegas Harry Reid Intl

Mon 10/20

12:59 am-2:30 pm

1 stop10h 31m

$190

TorontoLas Vegas

YYZ - LAS

YYZLAS

Toronto Pearson Intl

Wed 10/1

8:00 am-8:21 pm

2 stops15h 21m

Las Vegas Harry Reid Intl

Sat 10/4

8:00 am-8:52 pm

1 stop9h 52m

$194

TorontoLas Vegas

YYZ - LAS

YYZLAS

Toronto Pearson Intl

Sat 11/1

3:45 pm-9:35 pm

1 stop8h 50m

Las Vegas Harry Reid Intl

Wed 11/5

12:59 am-2:20 pm

1 stop10h 21m

$194

TorontoLas Vegas

YYZ - LAS

YYZLAS

Toronto Pearson Intl

Sat 10/4

9:00 am-4:59 pm

2 stops10h 59m

Las Vegas Harry Reid Intl

Sat 10/4

7:05 pm-7:05 pm

2 stops21h 00m

$194

TorontoLos Angeles

YYZ - LAX

YYZLAX

Toronto Pearson Intl

Sun 11/23

10:00 am-7:50 pm

2 stops12h 50m

Los Angeles

Thu 12/11

12:15 pm-12:26 am

1 stop9h 11m

$200

TorontoLas Vegas

YTZ - LAS

YTZLAS

Toronto Island

Tue 10/21

3:25 pm-10:22 pm

1 stop9h 57m

Las Vegas Harry Reid Intl

Sat 10/25

11:15 pm-11:55 am

1 stop9h 40m

$200

TorontoLas Vegas

YTZ - LAS

YTZLAS

Toronto Island

Tue 10/21

3:25 pm-10:22 pm

1 stop9h 57m

Las Vegas Harry Reid Intl

Tue 10/28

9:10 am-9:35 pm

1 stop9h 25m

$200

TorontoLas Vegas

YYZ - LAS

YYZLAS

Toronto Pearson Intl

Wed 9/24

1:00 pm-8:24 pm

2 stops10h 24m

Las Vegas Harry Reid Intl

Tue 9/30

6:27 pm-7:00 am

1 stop9h 33m

$200

TorontoLas Vegas

YYZ - LAS

YYZLAS

Toronto Pearson Intl

Wed 9/24

4:18 pm-8:37 pm

1 stop7h 19m

Las Vegas Harry Reid Intl

Sat 9/27

2:32 pm-11:58 pm

1 stop6h 26m

$200

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/10

Showing 1-10 of 60 results
1
2
3
...
6

Best time to book a flight from Ontario to California

Have a flexible travel schedule? Discover the best time to fly to California from Ontario with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Ontario to California

What is the cheapest month to book a flight from Region of Ontario to California?

Currently, January is the cheapest month in which you can book a flight from Region of Ontario to California (average of $246). Flying from Region of Ontario to California in March is currently the most expensive (average of $325). 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 ON to CA?

Find hourly flight availability from Ontario to California. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 11, 2025.

When flying from Region of Ontario to California, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Weekly flight availability from Region of Ontario to California

Explore weekly flight availability from Ontario to California. 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 September 11, 2025.

The most flights from CAON to USCA are scheduled on a Tuesday (22 on average). You will have fewer flight options on Friday, which is when the least amount of flights are scheduled (14 on average).

How much does it cost to fly round-trip from Region of Ontario to California?

Reviews of airlines servicing California

Get insights into the airlines that provide service to California. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to California. Reviews last updated September 11, 2025.
Read through reviews of airlines operating flights from Ontario to California, such as Porter Airlines, Air Transat, and United Airlines. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Porter Airlines
7.9
Good
363 reviews

Entertainment

7.0

Food

7.6

Boarding

8.1

Comfort

7.9

Overall

7.9

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Anonymous,Sep 2025

YYZ - OPO

Very disappointing, booked with Porter airlines and changed to Air Transit last minute. Old plane, cramped seating, even the aisle was the narrowest I’ve ever seen. Very uncomfortable flight. Full meal at 130 am and only a small piece of banana bread in the morning… should be opposite.
Porter Airlines
7.9
Good
363 reviews
Porter Airlines
7.9
Good
363 reviews

Entertainment

7.0

Food

7.6

Boarding

8.1

Comfort

7.9

Overall

7.9

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Anonymous,Sep 2025

YYZ - OPO

Very disappointing, booked with Porter airlines and changed to Air Transit last minute. Old plane, cramped seating, even the aisle was the narrowest I’ve ever seen. Very uncomfortable flight. Full meal at 130 am and only a small piece of banana bread in the morning… should be opposite.
Air Transat
7.7
Good
438 reviews
Porter Airlines
7.9
Good
363 reviews

Entertainment

7.0

Food

7.6

Boarding

8.1

Comfort

7.9

Overall

7.9

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Anonymous,Sep 2025

YYZ - OPO

Very disappointing, booked with Porter airlines and changed to Air Transit last minute. Old plane, cramped seating, even the aisle was the narrowest I’ve ever seen. Very uncomfortable flight. Full meal at 130 am and only a small piece of banana bread in the morning… should be opposite.
United Airlines
7.4
Good
8,937 reviews
Porter Airlines
7.9
Good
363 reviews

Entertainment

7.0

Food

7.6

Boarding

8.1

Comfort

7.9

Overall

7.9

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Anonymous,Sep 2025

YYZ - OPO

Very disappointing, booked with Porter airlines and changed to Air Transit last minute. Old plane, cramped seating, even the aisle was the narrowest I’ve ever seen. Very uncomfortable flight. Full meal at 130 am and only a small piece of banana bread in the morning… should be opposite.
WestJet
7.2
Good
3,091 reviews
Porter Airlines
7.9
Good
363 reviews

Entertainment

7.0

Food

7.6

Boarding

8.1

Comfort

7.9

Overall

7.9

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Anonymous,Sep 2025

YYZ - OPO

Very disappointing, booked with Porter airlines and changed to Air Transit last minute. Old plane, cramped seating, even the aisle was the narrowest I’ve ever seen. Very uncomfortable flight. Full meal at 130 am and only a small piece of banana bread in the morning… should be opposite.
Air Canada
7.1
Good
10,000 reviews
Porter Airlines
7.9
Good
363 reviews

Entertainment

7.0

Food

7.6

Boarding

8.1

Comfort

7.9

Overall

7.9

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Anonymous,Sep 2025

YYZ - OPO

Very disappointing, booked with Porter airlines and changed to Air Transit last minute. Old plane, cramped seating, even the aisle was the narrowest I’ve ever seen. Very uncomfortable flight. Full meal at 130 am and only a small piece of banana bread in the morning… should be opposite.

Related info for your journey

Find useful and relevant information for your journey from Ontario to California. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Region of Ontario to California?

    Airlines like Air Canada, United Airlines, and WestJet fly from Region of Ontario to California in about 7h 57m. The time it takes to get you to your destination can typically vary by up to 7h 24m. There are 1949 mi between Region of Ontario and California. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the cheapest airlines to fly from Region of Ontario to California one-way?

    The cheapest airline one-way is Air Canada, with whom users have recently found tickets for as low as $113. However, be on the lookout for offers from United Airlines and WestJet, as they are both options that can get you from Region of Ontario to California for a low price.

  • Can I find deals for flights from Ontario to California that include hotel bookings?

    Yes. In addition to deals on Ontario to California flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ontario to California?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to California.

  • Can I find deals for business class flights from Ontario to California?

    Yes. Cheapflights offers flight deals from Ontario to California by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Region of Ontario to California?

    Currently, January is the cheapest month in which you can book a flight from Region of Ontario to California (average of $246). Flying from Region of Ontario to California in March is currently the most expensive (average of $325). 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.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Ontario to California

See prices for flight routes from nearby airports that may be better suited for you.
Pearson Intl to Newark flights
Toronto Island to Newark flights
Pearson Intl to John F Kennedy Intl flights
Pearson Intl to LaGuardia flights
Pearson Intl to Las Vegas flights
Pierre Elliott Trudeau Intl to LaGuardia flights
Pierre Elliott Trudeau Intl to Fort Lauderdale flights
Pearson Intl to Fort Lauderdale flights
Pierre Elliott Trudeau Intl to Newark flights
Pearson Intl to Los Angeles flights
Pierre Elliott Trudeau Intl to John F Kennedy Intl flights
Pearson Intl to Dallas/Fort Worth flights
Vancouver Intl to Los Angeles flights
Pearson Intl to Miami flights
Vancouver Intl to Las Vegas flights
Pearson Intl to San Francisco flights
Pearson Intl to Orlando flights
Vancouver Intl to John F Kennedy Intl flights
Vancouver Intl to Newark flights
Pierre Elliott Trudeau Intl to Miami flights
Vancouver Intl to San Francisco flights
Pearson Intl to Boston flights
Pearson Intl to Dulles Intl flights
Pearson Intl to Hobby flights
Vancouver Intl to Seattle flights
Pearson Intl to O'Hare Intl flights
Pearson Intl to Reagan-National flights
Pearson Intl to George Bush Intcntl flights
Pearson Intl to Sky Harbor Intl flights
Pearson Intl to Nashville flights
Pearson Intl to Atlanta flights
Pierre Elliott Trudeau Intl to Las Vegas flights
Pierre Elliott Trudeau Intl to Orlando flights
Pearson Intl to Tampa flights
Vancouver Intl to Honolulu flights
Toronto Island to Fort Lauderdale flights
Pierre Elliott Trudeau Intl to Los Angeles flights
Pearson Intl to West Palm Beach flights
Vancouver Intl to O'Hare Intl flights
Vancouver Intl to Sky Harbor Intl flights
Calgary to Las Vegas flights
Vancouver Intl to LaGuardia flights
Ottawa to Fort Lauderdale flights
Vancouver Intl to Santa Ana flights
Pearson Intl to Seattle flights
Toronto Island to Orlando flights
Vancouver Intl to Miami flights
Pierre Elliott Trudeau Intl to Boston flights
Vancouver Intl to San Diego flights
Pearson Intl to Fort Myers flights

Top 7 airlines flying from Ontario to California

Discover the top 7 airlines that operate flights from Ontario to California. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated September 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
Porter AirlinesCheapest$116Average$337FlexibilityNo cancel feeOn-time52%
WestJetCheapest$144Average$281FlexibilityNo cancel feeOn-time60%
Air CanadaCheapest$169Average$437FlexibilityNo cancel feeOn-time67%
United AirlinesCheapest$171Average$415FlexibilityNo cancel feeOn-time69%
DeltaCheapest$187Average$351FlexibilityNo cancel feeOn-timeN/A
Air TransatCheapest$197Average$363FlexibilityNo cancel feeOn-time50%
American AirlinesCheapest$199Average$471FlexibilityNo cancel feeOn-time71%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.