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Ontario

$73+ 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 1/19. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — YYZ
nov. 28 — dec. 51
vr 11/28
vr 12/5
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 oktober 29, 2025.

Most accurate provider

Justfly.com
3 stars

Most trusted provider

Justfly.com
3 stars

Round-trip from

$177
(Kiwi.com)

One-way from

$73
(Kiwi.com)

Popular in

December

Cheapest in

May

Average price

$305

Good round-trip deal

$327 or less

Good one-way deal

$159 or less
Provider with most accurate pricing for Los Angeles-Toronto (YTO) flight deals.
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Provider most trusted by Cheapflights users for Los Angeles-Toronto (YTO) flights.
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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 ($58 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($13 potential savings vs. average RT price).
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Average for round-trip flights in October 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 oktober 29, 2025.

This Kiwi.com deal was found by Cheapflights users on 10/28. 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.
do 12/111:10 pmLAS - YYZ
Nonstop4h 22mWestJet
zo 12/148:00 pmYYZ - LAS
Nonstop5h 09mWestJet
Deal found 10/28$208
This Kiwi.com deal was found by Cheapflights users on 10/27. 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.
do 11/2712:40 pmLAS - YYZ
Nonstop4h 15mPorter Airlines
wo 12/39:35 amYYZ - LAS
Nonstop5h 07mPorter Airlines
Deal found 10/27$213
This Kiwi.com deal was found by Cheapflights users on 10/29. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
wo 12/101:10 pmLAS - YYZ
2 stops13h 48mMultiple Airlines
do 12/117:55 pmYYZ - LAS
Nonstop5h 07mMultiple Airlines
Deal found 10/29$214
This Kiwi.com deal was found by Cheapflights users on 10/26. 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.
di 12/23:45 pmLAS - YYZ
Nonstop4h 15mPorter Airlines
wo 12/109:35 amYYZ - LAS
Nonstop5h 07mPorter Airlines
Deal found 10/26$215
This Kiwi.com deal was found by Cheapflights users on 10/29. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vr 11/2811:05 pmLAS - YYZ
Nonstop4h 15mPorter Airlines
do 12/49:35 amYYZ - LAS
Nonstop5h 07mPorter Airlines
Deal found 10/29$216
This Trip.com deal was found by Cheapflights users on 10/29. 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.
wo 12/1012:40 pmLAS - YYZ
Nonstop4h 15mPorter Airlines
do 12/117:55 pmYYZ - LAS
Nonstop5h 07mPorter Airlines
Deal found 10/29$218
This Kiwi.com deal was found by Cheapflights users on 10/28. 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.
do 11/2011:05 pmLAS - YYZ
Nonstop4h 15mPorter Airlines
zo 11/237:55 pmYYZ - LAS
Nonstop5h 07mPorter Airlines
Deal found 10/28$220
This Kiwi.com deal was found by Cheapflights users on 10/27. 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.
di 11/1812:40 pmLAS - YYZ
Nonstop4h 15mPorter Airlines
ma 11/247:55 pmYYZ - LAS
Nonstop5h 07mPorter Airlines
Deal found 10/27$221
This Kiwi.com deal was found by Cheapflights users on 10/27. 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.
do 11/2011:05 pmLAS - YYZ
Nonstop4h 15mPorter Airlines
do 11/277:55 pmYYZ - LAS
Nonstop5h 07mPorter Airlines
Deal found 10/27$223
This Kiwi.com deal was found by Cheapflights users on 10/27. 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.
di 11/1812:40 pmLAS - YYZ
Nonstop4h 15mPorter Airlines
do 11/277:55 pmYYZ - LAS
Nonstop5h 07mPorter Airlines
Deal found 10/27$224
This Kiwi.com deal was found by Cheapflights users on 10/29. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vr 12/121:40 pmLAX - YYZ
Nonstop4h 43mPorter Airlines
zo 12/1410:00 amYYZ - LAX
Nonstop5h 36mPorter Airlines
Deal found 10/29$245
This Kiwi.com deal was found by Cheapflights users on 10/29. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vr 11/281:40 pmLAX - YYZ
Nonstop4h 40mPorter Airlines
do 12/410:00 amYYZ - LAX
Nonstop5h 36mPorter Airlines
Deal found 10/29$247

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 oktober 29, 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

vr 12/12

12:40 pm-7:55 pm

Nonstop4h 15m

Toronto Pearson Intl

zo 12/14

8:00 pm-10:09 pm

Nonstop5h 09m

$214

Las VegasToronto

LAS - YYZ

LASYYZ

Las Vegas Harry Reid Intl

vr 11/28

8:00 am-7:36 pm

1 stop8h 36m

Toronto Pearson Intl

do 12/4

7:55 pm-10:02 pm

Nonstop5h 07m

$227

Las VegasToronto

LAS - YYZ

LASYYZ

Las Vegas Harry Reid Intl

do 2/19

11:25 pm-6:43 am

Nonstop4h 18m

Toronto Pearson Intl

zo 2/22

8:00 pm-10:12 pm

Nonstop5h 12m

$232

Las VegasToronto

LAS - YYZ

LASYYZ

Las Vegas Harry Reid Intl

di 11/18

12:40 pm-7:55 pm

Nonstop4h 15m

Toronto Pearson Intl

ma 11/24

1:30 pm-8:15 pm

1 stop9h 45m

$239

Las VegasToronto

LAS - YYZ

LASYYZ

Las Vegas Harry Reid Intl

za 11/15

3:45 pm-11:00 pm

Nonstop4h 15m

Toronto Pearson Intl

zo 11/23

7:55 pm-10:02 pm

Nonstop5h 07m

$244

Las VegasToronto

LAS - YYZ

LASYYZ

Las Vegas Harry Reid Intl

wo 12/24

6:05 am-11:20 pm

2 stops14h 15m

Toronto Pearson Intl

zo 1/4

8:00 pm-10:09 pm

Nonstop5h 09m

$246

Las VegasToronto

LAS - YYZ

LASYYZ

Las Vegas Harry Reid Intl

za 11/15

3:45 pm-11:00 pm

Nonstop4h 15m

Toronto Pearson Intl

wo 12/3

9:35 am-11:42 am

Nonstop5h 07m

$250

Las VegasToronto

LAS - YYZ

LASYYZ

Las Vegas Harry Reid Intl

vr 11/28

7:00 am-5:49 pm

1 stop7h 49m

Toronto Pearson Intl

vr 11/28

8:25 pm-10:31 pm

Nonstop5h 06m

$250

Las VegasToronto

LAS - YYZ

LASYYZ

Las Vegas Harry Reid Intl

ma 1/19

12:30 am-4:02 pm

1 stop12h 32m

Toronto Pearson Intl

za 1/24

8:25 pm-10:31 pm

Nonstop5h 06m

$252

Las VegasToronto

LAS - YYZ

LASYYZ

Las Vegas Harry Reid Intl

wo 2/18

12:59 am-2:20 pm

1 stop10h 21m

Toronto Pearson Intl

zo 2/22

3:45 pm-11:31 pm

1 stop10h 46m

$257

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/28

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, December is the cheapest month in which you can book a flight from California to Region of Ontario (average of $19). Flying from California to Region of Ontario in March is currently the most expensive (average of $122). 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 oktober 29, 2025.

A simple way to save on the total cost of your ticket is to fly from California to Region of Ontario at noon. If you’re flexible enough to do this you can expect to save up to 26% on your trip compared to booking a flight in the morning.

What is the cheapest day to fly from California to Region of Ontario?

Use this chart to determine the cheapest time to fly round-trip from California to Ontario. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their California to Region of Ontario flight should consider departing on Wednesday at noon when fares are most often at their lowest. Wednesday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

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 oktober 29, 2025.
Get a feel of what it's like to fly with Porter Airlines, Delta, 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.
Porter Airlines
8.0
Very good
384 reviews

Entertainment

7.0

Comfort

8.0

Boarding

8.2

Overall

8.0

Crew

8.6

Food

7.6

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
8.0
Very good
384 reviews
Porter Airlines
8.0
Very good
384 reviews

Entertainment

7.0

Comfort

8.0

Boarding

8.2

Overall

8.0

Crew

8.6

Food

7.6

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.
Delta
7.9
Good
7,993 reviews
Porter Airlines
8.0
Very good
384 reviews

Entertainment

7.0

Comfort

8.0

Boarding

8.2

Overall

8.0

Crew

8.6

Food

7.6

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
8,998 reviews
Porter Airlines
8.0
Very good
384 reviews

Entertainment

7.0

Comfort

8.0

Boarding

8.2

Overall

8.0

Crew

8.6

Food

7.6

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
3,149 reviews
Porter Airlines
8.0
Very good
384 reviews

Entertainment

7.0

Comfort

8.0

Boarding

8.2

Overall

8.0

Crew

8.6

Food

7.6

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
10,376 reviews
Porter Airlines
8.0
Very good
384 reviews

Entertainment

7.0

Comfort

8.0

Boarding

8.2

Overall

8.0

Crew

8.6

Food

7.6

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 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 $244, WestJet can have you in Region of Ontario from California in 4h 15m. 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 WestJet, with whom users have recently found tickets for as low as $82. However, be on the lookout for offers from Porter Airlines 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, December is the cheapest month in which you can book a flight from California to Region of Ontario (average of $19). Flying from California to Region of Ontario in March is currently the most expensive (average of $122). 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 oktober 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
Porter AirlinesCheapest$20Average$332FlexibilityNo cancel feeOn-time52%
FrontierCheapest$36Average$81FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$105Average$520FlexibilityNo cancel feeOn-time69%
WestJetCheapest$119Average$343FlexibilityNo cancel feeOn-time60%
DeltaCheapest$131Average$457FlexibilityNo cancel feeOn-timeN/A
Air CanadaCheapest$135Average$497FlexibilityNo cancel feeOn-time67%
Air TransatCheapest$146Average$365FlexibilityNo cancel feeOn-time50%
American AirlinesCheapest$235Average$572FlexibilityNo cancel feeOn-time71%

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