HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Ontario

$105+ 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 12/12. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — YYZ
Nov 25 — Dec 21
Mon 11/25
Mon 12/2
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from California to Ontario 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 California to Ontario

Discover tips and strategies to find the most affordable flight options for your journey from California (USCA) to Ontario (CAON). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated November 20, 2024.

Find flight deals from California to Ontario

Cheapest flights from California to Ontario
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 November 20, 2024.

This flugladen.de deal was found by Cheapflights users on 11/19. 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 flugladen.de is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/137:35 amLAX - YYZ
Nonstop4h 41mMultiple Airlines
Sun 12/157:55 amYYZ - LAX
1 stop11h 57mMultiple Airlines
Deal found 11/19$202
This Trip.com deal was found by Cheapflights users on 11/19. 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 12/109:35 amSAN - YYZ
Nonstop4h 45mPorter Airlines
Mon 12/1610:20 amYYZ - SAN
Nonstop5h 45mPorter Airlines
Deal found 11/19$215
This Trip.com deal was found by Cheapflights users on 11/18. 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 12/107:35 amLAX - YYZ
Nonstop4h 41mPorter Airlines
Sat 12/149:30 amYYZ - LAX
Nonstop5h 38mPorter Airlines
Deal found 11/18$220
This Kiwi.com deal was found by Cheapflights users on 11/18. 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 12/610:30 amLAX - YYZ
1 stop10h 04mWestJet
Tue 12/101:50 pmYYZ - LAX
1 stop10h 52mWestJet
Deal found 11/18$223
This Priceline deal was found by Cheapflights users on 11/19. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/109:35 amSAN - YYZ
Nonstop4h 45mMultiple Airlines
Fri 12/1310:20 amYYZ - SAN
Nonstop5h 45mMultiple Airlines
Deal found 11/19$236
This United Airlines deal was found by Cheapflights users on 11/19. 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 12/103:25 pmSAN - YYZ
1 stop17h 01mUnited Airlines
Mon 12/169:25 amYYZ - SAN
Nonstop5h 38mUnited Airlines
Deal found 11/19$247
This Kiwi.com deal was found by Cheapflights users on 11/19. 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 12/97:00 pmSFO - YYZ
1 stop17h 16mMultiple Airlines
Wed 12/118:00 pmYYZ - SFO
1 stop14h 14mMultiple Airlines
Deal found 11/19$250
This Kiwi.com deal was found by Cheapflights users on 11/19. 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 12/41:42 pmSJC - YYZ
1 stop14h 04mMultiple Airlines
Mon 12/98:00 pmYYZ - SJC
1 stop14h 46mMultiple Airlines
Deal found 11/19$258
This Trip.com deal was found by Cheapflights users on 11/20. 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 12/41:30 pmSFO - YUL
1 stop7h 58mPorter Airlines
Mon 12/96:45 amYUL - SFO
1 stop8h 39mPorter Airlines
Deal found 11/20$268
This Kiwi.com deal was found by Cheapflights users on 11/19. 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 12/35:30 amOAK - YYZ
2 stops10h 51mMultiple Airlines
Wed 12/118:00 pmYYZ - OAK
1 stop16h 25mMultiple Airlines
Deal found 11/19$270
This Trip.com deal was found by Cheapflights users on 11/20. 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 12/51:15 pmLAX - YUL
1 stop8h 13mPorter Airlines
Mon 12/96:45 amYUL - LAX
1 stop8h 23mPorter Airlines
Deal found 11/20$270
This Mytrip deal was found by Cheapflights users on 11/18. 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 12/105:30 amLAX - YUL
1 stop8h 05mMultiple Airlines
Tue 12/175:35 pmYUL - LAX
1 stop18h 40mMultiple Airlines
Deal found 11/18$278

Find flights from California to Ontario within your budget

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 2,629,791 searches. Data last updated November 20, 2024.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

Los AngelesToronto

LAX - YYZ

LAXYYZ

Los Angeles

Fri 12/13

7:35 am-3:16 pm

Nonstop4h 41m

Toronto Pearson Intl

Sun 12/15

7:55 am-4:52 pm

1 stop11h 57m

$202

San DiegoToronto

SAN - YYZ

SANYYZ

San Diego

Tue 12/10

9:35 am-5:20 pm

Nonstop4h 45m

Toronto Pearson Intl

Mon 12/16

10:20 am-1:05 pm

Nonstop5h 45m

$215

Los AngelesToronto

LAX - YYZ

LAXYYZ

Los Angeles

Tue 12/10

7:35 am-3:16 pm

Nonstop4h 41m

Toronto Pearson Intl

Sat 12/14

9:30 am-12:08 pm

Nonstop5h 38m

$220

Los AngelesToronto

LAX - YYZ

LAXYYZ

Los Angeles

Fri 12/6

10:30 am-11:34 pm

1 stop10h 04m

Toronto Pearson Intl

Tue 12/10

1:50 pm-9:42 pm

1 stop10h 52m

$223

San DiegoToronto

SAN - YYZ

SANYYZ

San Diego

Tue 12/10

9:35 am-5:20 pm

Nonstop4h 45m

Toronto Pearson Intl

Fri 12/13

10:20 am-1:05 pm

Nonstop5h 45m

$236

San DiegoToronto

SAN - YYZ

SANYYZ

San Diego

Tue 12/10

3:25 pm-11:26 am

1 stop17h 01m

Toronto Pearson Intl

Mon 12/16

9:25 am-12:03 pm

Nonstop5h 38m

$247

San FranciscoToronto

SFO - YYZ

SFOYYZ

San Francisco

Mon 12/9

7:00 pm-3:16 pm

1 stop17h 16m

Toronto Pearson Intl

Wed 12/11

8:00 pm-7:14 am

1 stop14h 14m

$250

San JoseToronto

SJC - YYZ

SJCYYZ

San Jose

Wed 12/4

1:42 pm-6:46 am

1 stop14h 04m

Toronto Pearson Intl

Mon 12/9

8:00 pm-7:46 am

1 stop14h 46m

$258

OaklandToronto

OAK - YYZ

OAKYYZ

Oakland

Sat 1/18

5:34 pm-5:55 am

1 stop9h 21m

Toronto Pearson Intl

Wed 1/29

8:00 pm-6:47 am

1 stop13h 47m

$261

San FranciscoMontreal

SFO - YUL

SFOYUL

San Francisco

Wed 12/4

1:30 pm-12:28 am

1 stop7h 58m

Montreal Pierre Elliott Trudeau Intl

Mon 12/9

6:45 am-12:24 pm

1 stop8h 39m

$268

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/19

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

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.

Travel insights for flights from California to Ontario

Get recent, data-driven insights about flights from California to Ontario including ideal travel times, pricing trends, and more.

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 $242). Flying from California to Region of Ontario in July is currently the most expensive (average of $359). 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 November 20, 2024.

When flying from California to Region of Ontario, 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 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 November 20, 2024.

The most flights from USCA to CAON are scheduled on a Monday (25 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (15 on average).

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 2.0 - 3.3 inches per month. June is typically the wettest month, when rainfall can reach 3.3 in. February is typically the driest time to visit Region of Ontario when rainfall is around 2.0 in.

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 69.8 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 21.2 F).

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 November 20, 2024.
Get a feel of what it's like to fly with Porter Airlines, WestJet and United Airlines from California to Ontario by reading reviews from past customers. 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.
Delta
8.0
Very good
8,756 reviews

Entertainment

7.9

Comfort

7.9

Food

7.3

Overall

8.0

Crew

8.5

Boarding

8.2

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Delta
8.0
Very good
8,756 reviews
Delta
8.0
Very good
8,756 reviews

Entertainment

7.9

Comfort

7.9

Food

7.3

Overall

8.0

Crew

8.5

Boarding

8.2

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Alaska Airlines
8.0
Very good
9,461 reviews
Delta
8.0
Very good
8,756 reviews

Entertainment

7.9

Comfort

7.9

Food

7.3

Overall

8.0

Crew

8.5

Boarding

8.2

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Porter Airlines
7.8
Good
288 reviews
Delta
8.0
Very good
8,756 reviews

Entertainment

7.9

Comfort

7.9

Food

7.3

Overall

8.0

Crew

8.5

Boarding

8.2

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Air Transat
7.8
Good
389 reviews
Delta
8.0
Very good
8,756 reviews

Entertainment

7.9

Comfort

7.9

Food

7.3

Overall

8.0

Crew

8.5

Boarding

8.2

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

SWISS
7.6
Good
1,637 reviews
Delta
8.0
Very good
8,756 reviews

Entertainment

7.9

Comfort

7.9

Food

7.3

Overall

8.0

Crew

8.5

Boarding

8.2

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

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.

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

    The cheapest airline one-way is United Airlines, with whom users have recently found tickets for as low as $105. However, be on the lookout for offers from Porter Airlines and WestJet, as they are both options that can get you from California to Region of Ontario for a low price.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from California to Ontario 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 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 $242). Flying from California to Region of Ontario in July is currently the most expensive (average of $359). 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 California to Ontario

See prices for flight routes from nearby airports that may be better suited for you.
Newark to Pearson Intl flights
Newark to Toronto Island flights
LaGuardia to Pearson Intl flights
John F Kennedy Intl to Vancouver Intl flights
John F Kennedy Intl to Pearson Intl flights
San Francisco to Vancouver Intl flights
John F Kennedy Intl to Pierre Elliott Trudeau Intl flights
Los Angeles to Vancouver Intl flights
Newark to Vancouver Intl flights
Newark to Pierre Elliott Trudeau Intl flights
O'Hare Intl to Vancouver Intl flights
LaGuardia to Vancouver Intl flights
Boston to Pearson Intl flights
Reagan-National to Pearson Intl flights
Dallas/Fort Worth to Vancouver Intl flights
LaGuardia to Pierre Elliott Trudeau Intl flights
Los Angeles to Pearson Intl flights
Los Angeles to Abbotsford flights
San Francisco to Pearson Intl flights
Dulles Intl to Pearson Intl flights
Denver to Vancouver Intl flights
Santa Ana to Vancouver Intl flights
Dallas/Fort Worth to Pearson Intl flights
Reagan-National to Pierre Elliott Trudeau Intl flights
O'Hare Intl to Pearson Intl flights
Dulles Intl to Pierre Elliott Trudeau Intl flights
Minneapolis to Vancouver Intl flights
Boston to Toronto Island flights
Dulles Intl to Vancouver Intl flights
Newark to Québec City flights
Baltimore to Pearson Intl flights
Boston to Vancouver Intl flights
Ontario to Vancouver Intl flights
Reagan-National to Vancouver Intl flights
Baltimore to Vancouver Intl flights
Hobby to Vancouver Intl flights
Seattle to Vancouver Intl flights
Atlanta to Vancouver Intl flights
Newark to Calgary flights
John F Kennedy Intl to Calgary flights
Miami to Pearson Intl flights
Atlanta to Pearson Intl flights
San Francisco to Abbotsford flights
Dulles Intl to Toronto Island flights
John F Kennedy Intl to Abbotsford flights
Seattle to Pearson Intl flights
Los Angeles to Pierre Elliott Trudeau Intl flights
Los Angeles to Calgary flights
George Bush Intcntl to Vancouver Intl flights
O'Hare Intl to Pierre Elliott Trudeau Intl flights

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 2,629,791 searches. Data last updated November 20, 2024.
AirlineCheapestAverageFlexibilityOn-time
Porter AirlinesCheapest$88Average$410FlexibilityNo cancel feeOn-time52%
Air CanadaCheapest$144Average$601FlexibilityNo cancel feeOn-time67%
American AirlinesCheapest$149Average$534FlexibilityNo cancel feeOn-time71%
DeltaCheapest$156Average$559FlexibilityNo cancel feeOn-timeN/A
Lynx AirCheapest$169Average$241FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$170Average$687FlexibilityNo cancel feeOn-time69%
WestJetCheapest$172Average$444FlexibilityNo cancel feeOn-time60%
Air TransatCheapest$187Average$405FlexibilityNo cancel feeOn-time50%
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.
View all available airlines