Find flights
Deals
When to book
Airlines
FAQs

Cheap flights from California to Ontario from C$ 119

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 21/2. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — YYZ
11 ene. — 18 ene.1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from California to Ontario

Enter your travel dates to find the best prices.

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 12 diciembre 2025.

dom. 14/1212:40 p.m.LAS - YYZ
Nonstop4h 15mMultiple Airlines
mar. 16/124:45 p.m.YYZ - LAS
1 stop9h 08mMultiple Airlines
Deal found 11/12C$ 379
lun. 15/123:30 p.m.LAX - YYZ
1 stop12h 17mMultiple Airlines
jue. 8/17:55 p.m.YYZ - LAX
1 stop22h 17mMultiple Airlines
Deal found 11/12C$ 385
lun. 15/123:30 p.m.LAX - YYZ
1 stop11h 50mMultiple Airlines
mié. 14/110:00 a.m.YYZ - LAX
Nonstop5h 36mMultiple Airlines
Deal found 10/12C$ 397
jue. 25/1212:10 p.m.LAS - YYZ
Nonstop4h 15mAir Canada
jue. 1/18:25 p.m.YYZ - LAS
Nonstop5h 06mAir Canada
Deal found 11/12C$ 407
lun. 15/123:30 p.m.LAX - YYZ
1 stop11h 50mMultiple Airlines
mié. 7/19:35 a.m.YYZ - LAX
1 stop12h 46mMultiple Airlines
Deal found 10/12C$ 421
jue. 25/127:45 a.m.LAX - YYZ
Nonstop4h 45mMultiple Airlines
jue. 29/110:15 p.m.YYZ - LAX
1 stop15h 45mMultiple Airlines
Deal found 9/12C$ 454
mié. 17/123:30 p.m.LAX - YYZ
2 stops17h 58mMultiple Airlines
vie. 16/17:55 p.m.YYZ - LAX
1 stop15h 27mMultiple Airlines
Deal found 10/12C$ 456
jue. 18/123:30 p.m.LAX - YYZ
2 stops17h 58mMultiple Airlines
vie. 16/110:30 a.m.YYZ - LAX
1 stop12h 20mMultiple Airlines
Deal found 10/12C$ 463
mar. 30/1211:40 p.m.LAS - YYZ
1 stop7h 36mAmerican Airlines
mar. 13/16:00 a.m.YYZ - LAS
1 stop14h 43mAmerican Airlines
Deal found 10/12C$ 466
vie. 26/127:45 a.m.LAX - YYZ
Nonstop4h 45mMultiple Airlines
jue. 29/11:30 p.m.YYZ - LAX
1 stop11h 33mMultiple Airlines
Deal found 9/12C$ 469
mié. 24/1211:30 p.m.LAS - YYZ
Nonstop4h 10mAir Canada
dom. 28/128:25 p.m.YYZ - LAS
Nonstop5h 06mAir Canada
Deal found 10/12C$ 476
mié. 31/1210:00 a.m.LAS - YYZ
2 stops21h 56mAmerican Airlines
lun. 5/17:30 a.m.YYZ - LAS
1 stop17h 29mAmerican Airlines
Deal found 10/12C$ 479

Find flight deals from California to Ontario

Keep the following information in mind while searching for California to Ontario flight deals. Data was last updated 12 diciembre 2025.

Round-trip from

C$ 217

One-way from

C$ 119

Popular in

December

Cheapest in

May

Average price

C$ 643

Good round-trip deal

C$ 243 or less

Good one-way deal

C$ 179 or less
Porter Airlines
  • Porter Airlines
  • 11/1-17/1
  • Nonstop
  • 9h 22m total
  • California to Ontario
Search Deals
United Airlines
  • United Airlines
  • 21/2
  • 2 total stops
  • 12h 16m total
  • California to Ontario
Search Deals
Highest demand for flights based on searches. 18% potential increase in price (C$ 135 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (C$ 27 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals
Price to beat on a round-trip flight from California to Ontario.
Search Deals
Price to beat on a one-way flight from California to Ontario.
Search Deals

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 629,999 searches. Data last updated 12 diciembre 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

mar. 5/5

12:35 p.m.-7:58 p.m.

Nonstop4h 23m

Toronto Pearson Intl

dom. 10/5

9:45 a.m.-11:39 a.m.

Nonstop4h 54m

C$ 248

Las VegasToronto

LAS - YYZ

LASYYZ

Las Vegas Harry Reid Intl

sáb. 11/4

7:05 p.m.-6:13 a.m.

1 stop8h 08m

Toronto Pearson Intl

lun. 13/4

8:00 p.m.-10:12 p.m.

Nonstop5h 12m

C$ 257

Las VegasToronto

LAS - YYZ

LASYYZ

Las Vegas Harry Reid Intl

sáb. 11/4

12:10 p.m.-7:35 p.m.

Nonstop4h 25m

Toronto Pearson Intl

lun. 13/4

8:35 p.m.-10:29 p.m.

Nonstop4h 54m

C$ 273

Las VegasToronto

LAS - YYZ

LASYYZ

Las Vegas Harry Reid Intl

mié. 21/1

6:00 a.m.-4:52 p.m.

1 stop7h 52m

Toronto Pearson Intl

sáb. 31/1

2:45 p.m.-9:57 p.m.

1 stop10h 12m

C$ 298

Las VegasToronto

LAS - YYZ

LASYYZ

Las Vegas Harry Reid Intl

jue. 15/1

8:05 a.m.-7:17 p.m.

1 stop8h 12m

Toronto Pearson Intl

dom. 18/1

2:57 p.m.-9:51 p.m.

1 stop9h 54m

C$ 310

Las VegasToronto

LAS - YYZ

LASYYZ

Las Vegas Harry Reid Intl

vie. 23/1

12:59 a.m.-2:20 p.m.

1 stop10h 21m

Toronto Pearson Intl

sáb. 31/1

10:45 a.m.-8:32 p.m.

2 stops12h 47m

C$ 312

Las VegasToronto

LAS - YYZ

LASYYZ

Las Vegas Harry Reid Intl

mié. 13/5

12:35 p.m.-7:58 p.m.

Nonstop4h 23m

Toronto Pearson Intl

jue. 21/5

12:00 p.m.-7:37 p.m.

1 stop10h 37m

C$ 313

Las VegasToronto

LAS - YYZ

LASYYZ

Las Vegas Harry Reid Intl

lun. 5/1

11:53 p.m.-2:14 p.m.

1 stop11h 21m

Toronto Pearson Intl

sáb. 10/1

9:30 a.m.-5:12 p.m.

1 stop10h 42m

C$ 317

Los AngelesToronto

LAX - YYZ

LAXYYZ

Los Angeles

mié. 18/2

1:40 p.m.-9:22 p.m.

Nonstop4h 42m

Toronto Pearson Intl

mié. 25/2

10:00 a.m.-12:36 p.m.

Nonstop5h 36m

C$ 332

OntarioToronto

ONT - YYZ

ONTYYZ

Ontario

lun. 12/1

2:34 p.m.-6:47 a.m.

1 stop13h 13m

Toronto Pearson Intl

mar. 20/1

1:30 p.m.-2:12 p.m.

2 stops27h 42m

C$ 357

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/12

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.

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 C$ 28). Flying from California to Region of Ontario in November is currently the most expensive (average of C$ 207). 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 12 diciembre 2025.

Unlike in the evening, when flights are generally more expensive, you can save up to 22% on flights from California to Region of Ontario by exploring options for tickets at noon.

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 16 December 2024.

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

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 12 diciembre 2025.

The most flights from USCA to CAON are scheduled on a Wednesday (15 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (9 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 12 diciembre 2025.
See what other customers who have flown with Porter Airlines,Air Transat, andUnited Airlines from California to Ontario have to say. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Porter Airlines
8.0
Very good
397 reviews
Check prices

Food

7.6

Comfort

8.0

Crew

8.6

Entertainment

7.0

Overall

8.0

Boarding

8.2

Reviews

1 / 20
8.0
Excellent

Mohameed,Nov 2025

LAS - YYZ

It's good. Planes are new and fresh. WiFi is best and stands out
Porter Airlines
8.0
Very good
397 reviews
Porter Airlines
8.0
Very good
397 reviews
Check prices

Food

7.6

Comfort

8.0

Crew

8.6

Entertainment

7.0

Overall

8.0

Boarding

8.2

Reviews

1 / 20
8.0
Excellent

Mohameed,Nov 2025

LAS - YYZ

It's good. Planes are new and fresh. WiFi is best and stands out
Air Transat
7.8
Good
480 reviews
Porter Airlines
8.0
Very good
397 reviews
Check prices

Food

7.6

Comfort

8.0

Crew

8.6

Entertainment

7.0

Overall

8.0

Boarding

8.2

Reviews

1 / 20
8.0
Excellent

Mohameed,Nov 2025

LAS - YYZ

It's good. Planes are new and fresh. WiFi is best and stands out
United Airlines
7.4
Good
9,095 reviews
Porter Airlines
8.0
Very good
397 reviews
Check prices

Food

7.6

Comfort

8.0

Crew

8.6

Entertainment

7.0

Overall

8.0

Boarding

8.2

Reviews

1 / 20
8.0
Excellent

Mohameed,Nov 2025

LAS - YYZ

It's good. Planes are new and fresh. WiFi is best and stands out
WestJet
7.2
Good
3,194 reviews
Porter Airlines
8.0
Very good
397 reviews
Check prices

Food

7.6

Comfort

8.0

Crew

8.6

Entertainment

7.0

Overall

8.0

Boarding

8.2

Reviews

1 / 20
8.0
Excellent

Mohameed,Nov 2025

LAS - YYZ

It's good. Planes are new and fresh. WiFi is best and stands out
Air Canada
7.1
Good
10,514 reviews
Porter Airlines
8.0
Very good
397 reviews
Check prices

Food

7.6

Comfort

8.0

Crew

8.6

Entertainment

7.0

Overall

8.0

Boarding

8.2

Reviews

1 / 20
8.0
Excellent

Mohameed,Nov 2025

LAS - YYZ

It's good. Planes are new and fresh. WiFi is best and stands out

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?

    A quick flight from California to Region of Ontario can take about 4h 23m. WestJet provides one of the quickest options available for as low as C$ 248. Airlines will cover a distance of 3119 km. Most flights are nonstop.

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

    C$ 51 is the cheapest one-way deal found within the past few days, from Porter Airlines. You may also be able to find cheap deals on WestJet and United Airlines, with prices starting from C$ 83 and C$ 112, respectively.

  • 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 C$ 28). Flying from California to Region of Ontario in November is currently the most expensive (average of C$ 207). 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.
LaGuardia to Pearson Intl flights
Newark to Pearson Intl flights
Newark to Toronto Island flights
Los Angeles to Vancouver Intl flights
John F Kennedy Intl to Pearson Intl flights
San Francisco to Vancouver Intl flights
John F Kennedy Intl to Vancouver Intl flights
Newark to Vancouver Intl flights
Newark to Pierre Elliott Trudeau Intl flights
LaGuardia to Pierre Elliott Trudeau Intl flights
John F Kennedy Intl to Pierre Elliott Trudeau Intl flights
Reagan-National to Pearson Intl flights
Dulles Intl to Pearson Intl flights
Denver to Vancouver Intl flights
Dulles Intl to Pierre Elliott Trudeau Intl flights
Dallas/Fort Worth to Pearson Intl flights
Newark to Calgary flights
O'Hare Intl to Pearson Intl flights
Los Angeles to Pearson Intl flights
San Diego to Vancouver Intl flights
Boston to Pearson Intl flights
San Francisco to Pearson Intl flights
John F Kennedy Intl to Calgary flights
O'Hare Intl to Vancouver Intl flights
LaGuardia to Vancouver Intl flights
Hobby to Vancouver Intl flights
Fort Lauderdale to Pierre Elliott Trudeau Intl flights
Reagan-National to Pierre Elliott Trudeau Intl flights
Atlanta to Pearson Intl flights
Los Angeles to Calgary flights
Los Angeles to Pierre Elliott Trudeau Intl flights
Hobby to Pearson Intl flights
Boston to Pierre Elliott Trudeau Intl flights
George Bush Intcntl to Vancouver Intl flights
Boston to Toronto Island flights
O'Hare Intl to Pierre Elliott Trudeau Intl flights
Newark to Québec City flights
O'Hare Intl to Calgary flights
Dulles Intl to Toronto Island flights
Atlanta to Vancouver Intl flights
Fort Lauderdale to Pearson Intl flights
Boston to Vancouver Intl flights
Dulles Intl to Vancouver Intl flights
George Bush Intcntl to Pearson Intl flights
Ontario to Vancouver Intl flights
Seattle to Pearson Intl flights
Baltimore to Pearson Intl flights
Seattle to Vancouver Intl flights
Dallas/Fort Worth to Vancouver Intl flights
Santa Ana to Vancouver Intl flights

Top 5 airlines flying from California to Ontario

Discover the top 5 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 629,999 searches. Data last updated 12 diciembre 2025.
AirlineCheapestAverageFlexibilityOn-time
Porter AirlinesCheapestC$ 146AverageC$ 504FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights
United AirlinesCheapestC$ 162AverageC$ 549FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Air CanadaCheapestC$ 196AverageC$ 636FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
WestJetCheapestC$ 216AverageC$ 367FlexibilityNo cancel feeOn-time60%
Search WestJet flights
Air TransatCheapestC$ 299AverageC$ 760FlexibilityNo cancel feeOn-time50%
Search Air Transat flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from California to Ontario?

900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to Ontario from California today with Cheapflights!

Why should you use Cheapflights to find cheap flight tickets from California to Ontario?

Cheapflights helps you find that perfect flight to Ontario from California by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

Can Cheapflights find flights from California to Ontario with no change fees?

Certainly. Search results for flights to Ontario from California shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

Can Cheapflights notify me if prices for flights from California to Ontario become cheaper?

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Ontario from California today and book when prices fit your budget.

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.