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Ontario

$79+ 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 10/7. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — YYZ
Oct 14 — Oct 211
Tue 10/14
Tue 10/21
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 September 14, 2025.

Round-trip from

$162
(Kiwi.com)

One-way from

$79
(Mytrip)

Popular in

December

Cheapest in

May

Average price

$290

Good round-trip deal

$291 or less

Good one-way deal

$161 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. 15% potential increase in price ($56 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 September 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 September 14, 2025.

This Kiwi.com deal was found by Cheapflights users on 9/14. 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.
Thu 9/2512:35 pmLAS - YYZ
Nonstop4h 23mWestJet
Tue 11/259:40 amYYZ - LAS
2 stops11h 31mWestJet
Deal found 9/14$162
This FlightHub deal was found by Cheapflights users on 9/12. 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 10/1811:30 amLAS - YYZ
1 stop8h 22mWestJet
Sun 10/196:30 amYYZ - LAS
2 stops11h 31mWestJet
Deal found 9/12$163
This FlightHub deal was found by Cheapflights users on 9/13. 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.
Wed 10/1511:30 amLAS - YYZ
1 stop8h 22mWestJet
Sun 10/196:30 amYYZ - LAS
1 stop11h 31mWestJet
Deal found 9/13$164
This oojo deal was found by Cheapflights users on 9/13. 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.
Tue 10/78:00 amLAS - YYZ
2 stops13h 31mWestJet
Tue 10/212:00 pmYYZ - LAS
1 stop9h 21mWestJet
Deal found 9/13$166
This oojo 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/187:00 amLAX - YYZ
2 stops14h 31mWestJet
Sat 10/2512:00 pmYYZ - LAX
1 stop9h 09mWestJet
Deal found 9/11$166
This oojo deal was found by Cheapflights users on 9/13. 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.
Thu 10/1612:35 pmLAS - YYZ
Nonstop4h 23mWestJet
Sun 10/196:30 amYYZ - LAS
1 stop11h 31mWestJet
Deal found 9/13$167
This Kiwi.com deal was found by Cheapflights users on 9/12. 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 10/1711:10 pmLAX - YYZ
Nonstop4h 49mMultiple Airlines
Tue 10/2110:40 amYYZ - LAX
Nonstop5h 20mMultiple Airlines
Deal found 9/12$167
This oojo deal was found by Cheapflights users on 9/12. 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 10/108:00 amLAS - YYZ
2 stops13h 31mWestJet
Sun 10/121:30 pmYYZ - LAS
1 stop10h 59mWestJet
Deal found 9/12$168
This Trip.com deal was found by Cheapflights users on 9/14. 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 10/72:00 pmLAX - YYZ
Nonstop4h 50mMultiple Airlines
Wed 10/157:45 pmYYZ - LAX
Nonstop5h 26mMultiple Airlines
Deal found 9/14$168
This Kiwi.com deal was found by Cheapflights users on 9/12. 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 11/2612:15 pmLAX - YYZ
1 stop9h 11mWestJet
Wed 12/310:00 amYYZ - LAX
1 stop9h 58mWestJet
Deal found 9/12$169
This Kiwi.com deal was found by Cheapflights users on 9/13. 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 10/248:00 amLAS - YYZ
1 stop9h 52mWestJet
Mon 10/2710:15 pmYYZ - LAS
1 stop17h 04mWestJet
Deal found 9/13$170
This Kiwi.com deal was found by Cheapflights users on 9/12. 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 10/72:00 pmLAX - YYZ
Nonstop4h 50mMultiple Airlines
Sat 10/113:00 pmYYZ - LAX
1 stop9h 46mMultiple Airlines
Deal found 9/12$170

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 September 14, 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

Las VegasToronto

LAS - YYZ

LASYYZ

Las Vegas Harry Reid Intl

Thu 9/25

12:35 pm-7:58 pm

Nonstop4h 23m

Toronto Pearson Intl

Tue 11/25

9:40 am-6:11 pm

2 stops11h 31m

$162

Las VegasToronto

LAS - YYZ

LASYYZ

Las Vegas Harry Reid Intl

Sat 10/18

11:30 am-10:52 pm

1 stop8h 22m

Toronto Pearson Intl

Mon 10/20

10:25 pm-12:32 pm

1 stop17h 07m

$163

Las VegasToronto

LAS - YYZ

LASYYZ

Las Vegas Harry Reid Intl

Sat 10/18

11:30 am-10:52 pm

1 stop8h 22m

Toronto Pearson Intl

Sun 10/19

6:45 am-3:01 pm

2 stops11h 16m

$163

Las VegasToronto

LAS - YYZ

LASYYZ

Las Vegas Harry Reid Intl

Fri 10/31

1:10 pm-8:32 pm

Nonstop4h 22m

Toronto Pearson Intl

Mon 11/3

1:30 pm-8:15 pm

1 stop9h 45m

$165

Las VegasToronto

LAS - YYZ

LASYYZ

Las Vegas Harry Reid Intl

Wed 10/29

11:20 am-11:11 pm

1 stop8h 51m

Toronto Pearson Intl

Wed 11/5

1:30 pm-9:31 pm

1 stop11h 01m

$166

Las VegasToronto

LAS - YYZ

LASYYZ

Las Vegas Harry Reid Intl

Fri 10/24

8:00 am-8:52 pm

1 stop9h 52m

Toronto Pearson Intl

Mon 10/27

10:15 pm-12:19 pm

1 stop17h 04m

$170

Las VegasToronto

LAS - YYZ

LASYYZ

Las Vegas Harry Reid Intl

Fri 10/24

10:55 pm-6:20 am

Nonstop4h 25m

Toronto Pearson Intl

Mon 10/27

10:15 pm-12:19 pm

1 stop17h 04m

$178

Las VegasToronto

LAS - YYZ

LASYYZ

Las Vegas Harry Reid Intl

Fri 11/14

7:05 pm-6:58 am

1 stop8h 53m

Toronto Pearson Intl

Sun 11/16

9:45 am-11:58 am

Nonstop5h 13m

$188

Las VegasToronto

LAS - YYZ

LASYYZ

Las Vegas Harry Reid Intl

Mon 10/6

12:59 am-2:30 pm

1 stop10h 31m

Toronto Pearson Intl

Tue 10/21

9:00 am-1:24 pm

1 stop7h 24m

$199

Las VegasToronto

LAS - YYZ

LASYYZ

Las Vegas Harry Reid Intl

Fri 10/17

12:59 am-2:30 pm

1 stop10h 31m

Toronto Pearson Intl

Mon 10/20

9:00 pm-9:36 am

1 stop15h 36m

$199

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/13

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 September 14, 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 September 14, 2025.

The most flights from USCA to CAON are scheduled on a Saturday (21 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (18 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 September 14, 2025.
Get a feel of what it's like to fly with Delta, Porter Airlines, and United Airlines 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.
Delta
8.0
Very good
7,956 reviews

Boarding

8.2

Overall

8.0

Entertainment

7.9

Food

7.3

Comfort

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Delta
8.0
Very good
7,956 reviews
Delta
8.0
Very good
7,956 reviews

Boarding

8.2

Overall

8.0

Entertainment

7.9

Food

7.3

Comfort

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Porter Airlines
7.9
Good
363 reviews
Delta
8.0
Very good
7,956 reviews

Boarding

8.2

Overall

8.0

Entertainment

7.9

Food

7.3

Comfort

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
United Airlines
7.4
Good
8,931 reviews
Delta
8.0
Very good
7,956 reviews

Boarding

8.2

Overall

8.0

Entertainment

7.9

Food

7.3

Comfort

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
WestJet
7.2
Good
3,091 reviews
Delta
8.0
Very good
7,956 reviews

Boarding

8.2

Overall

8.0

Entertainment

7.9

Food

7.3

Comfort

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Air Canada
7.1
Good
10,000 reviews
Delta
8.0
Very good
7,956 reviews

Boarding

8.2

Overall

8.0

Entertainment

7.9

Food

7.3

Comfort

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

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.

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

    For as low as $162, WestJet can have you in Region of Ontario from California in 4h 23m. California and Region of Ontario are separated by a distance of 1938 mi. This flight may include one or multiple stops.

  • 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 $83. However, be on the lookout for offers from Air Canada 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 $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

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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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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 2,558,603 searches. Data last updated September 14, 2025.
AirlineCheapestAverageFlexibilityOn-time
Porter AirlinesCheapest$20Average$336FlexibilityNo cancel feeOn-time52%
FrontierCheapest$36Average$81FlexibilityNo cancel feeOn-time62%
WestJetCheapest$120Average$345FlexibilityNo cancel feeOn-time60%
United AirlinesCheapest$131Average$523FlexibilityNo cancel feeOn-time69%
DeltaCheapest$131Average$471FlexibilityNo cancel feeOn-timeN/A
Air CanadaCheapest$132Average$488FlexibilityNo cancel feeOn-time67%
Air TransatCheapest$146Average$357FlexibilityNo cancel feeOn-time50%
American AirlinesCheapest$235Average$576FlexibilityNo cancel feeOn-time71%

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