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Ontario

$91+ 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 9/10. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — YYZ
Aug 4 — Aug 111
Mon 8/4
Mon 8/11
1 adult, Economy
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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 July 30, 2025.

Round-trip from

$170
(Mytrip)

One-way from

$91
(Air Canada)

Popular in

December

Cheapest in

May

Average price

$342

Good round-trip deal

$277 or less

Good one-way deal

$147 or less
From California to Ontario
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One-way flight from California to Ontario
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Highest demand for flights based on searches. 14% potential increase in price ($54 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($12 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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Price to beat on a round-trip flight from California to Ontario.
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Price to beat on a one-way flight from California to Ontario.
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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 July 30, 2025.

This Mytrip deal was found by Cheapflights users on 7/29. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/1411:10 pmLAX - YYZ
Nonstop4h 49mMultiple Airlines
Wed 9/1710:40 amYYZ - LAX
Nonstop5h 20mMultiple Airlines
Deal found 7/29$170
This Kiwi.com deal was found by Cheapflights users on 7/28. 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 11/1811:50 amLAX - YYZ
1 stop9h 48mWestJet
Sun 11/307:45 amYYZ - LAX
2 stops13h 47mWestJet
Deal found 7/28$174
This Flightnetwork deal was found by Cheapflights users on 7/29. 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 Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/610:30 pmLAX - YYZ
1 stop9h 09mAir Canada
Sat 9/136:35 pmYYZ - LAX
Nonstop5h 18mAir Canada
Deal found 7/29$178
This Kiwi.com deal was found by Cheapflights users on 7/28. 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.
Wed 11/191:40 pmLAX - YYZ
Nonstop4h 42mPorter Airlines
Tue 12/210:00 amYYZ - LAX
Nonstop5h 39mPorter Airlines
Deal found 7/28$198
This Flightnetwork deal was found by Cheapflights users on 7/29. 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 Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/610:30 pmLAX - YTZ
1 stop10h 15mAir Canada
Sat 9/133:25 pmYTZ - LAX
1 stop9h 10mAir Canada
Deal found 7/29$202
This Mytrip deal was found by Cheapflights users on 7/29. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/2010:15 amSFO - YYZ
1 stop16h 58mMultiple Airlines
Mon 9/299:00 pmYYZ - SFO
1 stop15h 30mMultiple Airlines
Deal found 7/29$238
This Mytrip deal was found by Cheapflights users on 7/28. 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.
Sat 10/1810:15 amSFO - YYZ
1 stop18h 00mFlair Airlines
Tue 10/219:00 pmYYZ - SFO
1 stop15h 30mFlair Airlines
Deal found 7/28$246
This Kiwi.com deal was found by Cheapflights users on 7/27. 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.
Fri 8/156:15 amSAN - YYZ
1 stop10h 44mMultiple Airlines
Tue 8/198:05 pmYYZ - SAN
1 stop14h 16mMultiple Airlines
Deal found 7/27$276
This Trip.com deal was found by Cheapflights users on 7/29. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/282:00 pmLAX - YUL
1 stop7h 37mMultiple Airlines
Thu 9/46:45 amYUL - LAX
2 stops13h 31mMultiple Airlines
Deal found 7/29$278
This Kiwi.com deal was found by Cheapflights users on 7/28. 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 9/267:30 amSFO - YYZ
2 stops10h 31mWestJet
Fri 10/33:00 pmYYZ - SFO
1 stop9h 24mWestJet
Deal found 7/28$282
This Kiwi.com deal was found by Cheapflights users on 7/28. 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.
Wed 10/152:00 pmLAX - YUL
1 stop7h 37mPorter Airlines
Tue 10/216:45 amYUL - LAX
1 stop9h 15mPorter Airlines
Deal found 7/28$282
This Booking.com deal was found by Cheapflights users on 7/29. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/3110:30 pmLAX - YUL
Nonstop5h 29mAir Canada
Sat 9/66:45 pmYUL - LAX
Nonstop5h 50mAir Canada
Deal found 7/29$283

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 July 30, 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 9/14

11:10 pm-6:59 am

Nonstop4h 49m

Toronto Pearson Intl

Wed 9/17

10:40 am-1:00 pm

Nonstop5h 20m

$170

Los AngelesToronto

LAX - YYZ

LAXYYZ

Los Angeles

Mon 8/25

6:05 pm-6:12 am

1 stop9h 07m

Toronto Pearson Intl

Thu 10/30

9:40 am-6:32 pm

2 stops11h 52m

$177

Los AngelesToronto

LAX - YYZ

LAXYYZ

Los Angeles

Sat 9/6

10:30 pm-10:39 am

1 stop9h 09m

Toronto Pearson Intl

Sat 9/13

6:35 pm-8:53 pm

Nonstop5h 18m

$178

Los AngelesToronto

LAX - YTZ

LAXYTZ

Los Angeles

Sat 9/6

10:30 pm-11:45 am

1 stop10h 15m

Toronto Island

Sat 9/13

3:25 pm-9:35 pm

1 stop9h 10m

$202

Los AngelesToronto

LAX - YYZ

LAXYYZ

Los Angeles

Thu 8/21

2:00 pm-9:57 pm

Nonstop4h 57m

Toronto Pearson Intl

Thu 8/28

10:40 am-1:00 pm

Nonstop5h 20m

$203

San FranciscoToronto

SFO - YYZ

SFOYYZ

San Francisco

Sat 9/20

10:15 am-6:13 am

1 stop16h 58m

Toronto Pearson Intl

Mon 9/29

9:00 pm-9:30 am

1 stop15h 30m

$238

San FranciscoToronto

SFO - YYZ

SFOYYZ

San Francisco

Sat 10/18

10:15 am-7:15 am

1 stop18h 00m

Toronto Pearson Intl

Tue 10/21

9:00 pm-9:30 am

1 stop15h 30m

$246

San DiegoToronto

SAN - YYZ

SANYYZ

San Diego

Fri 8/15

6:15 am-7:59 pm

1 stop10h 44m

Toronto Pearson Intl

Tue 8/19

8:05 pm-7:21 am

1 stop14h 16m

$276

Los AngelesMontreal

LAX - YUL

LAXYUL

Los Angeles

Thu 8/28

2:00 pm-12:37 am

1 stop7h 37m

Montreal Pierre Elliott Trudeau Intl

Thu 9/4

6:45 am-5:16 pm

2 stops13h 31m

$278

San FranciscoToronto

SFO - YYZ

SFOYYZ

San Francisco

Fri 9/26

7:30 am-9:01 pm

2 stops10h 31m

Toronto Pearson Intl

Wed 10/1

3:00 pm-9:24 pm

1 stop9h 24m

$282

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/29

Showing 1-10 of 60 results
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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 $243). Flying from California to Region of Ontario in August is currently the most expensive (average of $348). 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 July 30, 2025.

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 July 30, 2025.

The most flights from USCA to CAON are scheduled on a Wednesday (19 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (11 on average).

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 July 30, 2025.
Get a feel of what it's like to fly with Alaska Airlines, Porter Airlines, and Delta 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.
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Crew

8.5

Food

7.1

Overall

8.0

Comfort

7.8

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Surinder,May 2025

SEA - YYZ

My wife wanted the aile seat and I always prefer window seat. Luckily we both got the best seats we wanted. The plane was very nice and we enjoyed the best take off and the smooth landing at Toronto. All the services by the staff inside the aeroplane were very nice well appreciated. Thanks again and hope to see you soon.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Crew

8.5

Food

7.1

Overall

8.0

Comfort

7.8

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Surinder,May 2025

SEA - YYZ

My wife wanted the aile seat and I always prefer window seat. Luckily we both got the best seats we wanted. The plane was very nice and we enjoyed the best take off and the smooth landing at Toronto. All the services by the staff inside the aeroplane were very nice well appreciated. Thanks again and hope to see you soon.
Porter Airlines
8.0
Very good
318 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Crew

8.5

Food

7.1

Overall

8.0

Comfort

7.8

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Surinder,May 2025

SEA - YYZ

My wife wanted the aile seat and I always prefer window seat. Luckily we both got the best seats we wanted. The plane was very nice and we enjoyed the best take off and the smooth landing at Toronto. All the services by the staff inside the aeroplane were very nice well appreciated. Thanks again and hope to see you soon.
Delta
8.0
Very good
7,980 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Crew

8.5

Food

7.1

Overall

8.0

Comfort

7.8

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Surinder,May 2025

SEA - YYZ

My wife wanted the aile seat and I always prefer window seat. Luckily we both got the best seats we wanted. The plane was very nice and we enjoyed the best take off and the smooth landing at Toronto. All the services by the staff inside the aeroplane were very nice well appreciated. Thanks again and hope to see you soon.
Air Transat
7.7
Good
424 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Crew

8.5

Food

7.1

Overall

8.0

Comfort

7.8

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Surinder,May 2025

SEA - YYZ

My wife wanted the aile seat and I always prefer window seat. Luckily we both got the best seats we wanted. The plane was very nice and we enjoyed the best take off and the smooth landing at Toronto. All the services by the staff inside the aeroplane were very nice well appreciated. Thanks again and hope to see you soon.
United Airlines
7.4
Good
8,896 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Crew

8.5

Food

7.1

Overall

8.0

Comfort

7.8

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Surinder,May 2025

SEA - YYZ

My wife wanted the aile seat and I always prefer window seat. Luckily we both got the best seats we wanted. The plane was very nice and we enjoyed the best take off and the smooth landing at Toronto. All the services by the staff inside the aeroplane were very nice well appreciated. Thanks again and hope to see you soon.

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 Air Canada, with whom users have recently found tickets for as low as $91. However, be on the lookout for offers from WestJet and United Airlines, 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 $243). Flying from California to Region of Ontario in August is currently the most expensive (average of $348). 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

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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.
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Newark to Toronto Island flights
John F Kennedy Intl to Pearson Intl flights
John F Kennedy Intl to Pierre Elliott Trudeau Intl flights
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Top 7 airlines flying from California to Ontario

Discover the top 7 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 July 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
Porter AirlinesCheapest$118Average$354FlexibilityNo cancel feeOn-time52%
WestJetCheapest$120Average$343FlexibilityNo cancel feeOn-time60%
Air CanadaCheapest$130Average$488FlexibilityNo cancel feeOn-time67%
United AirlinesCheapest$131Average$503FlexibilityNo cancel feeOn-time69%
DeltaCheapest$131Average$482FlexibilityNo cancel feeOn-timeN/A
Air TransatCheapest$146Average$361FlexibilityNo cancel feeOn-time50%
American AirlinesCheapest$180Average$528FlexibilityNo cancel feeOn-time71%

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