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Cheap flights from California to Ontario from C$ 138

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 11/10. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — YYZ
29 May — 5 Jun1
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 29 April 2026.

Thu 14/56:10 p.m.
LAS
-
YYZ
1 stop8h 35m
WestJet
Sat 16/512:40 p.m.
YYZ
-
LAS
2 stops12h 00m
WestJet
Deal found 26/4C$ 311
Thu 14/56:10 p.m.
LAS
-
YYZ
1 stop8h 35m
WestJet
Wed 20/56:10 a.m.
YYZ
-
LAS
2 stops14h 05m
WestJet
Deal found 26/4C$ 313
Fri 12/66:10 p.m.
LAS
-
YYZ
1 stop8h 35m
WestJet
Wed 17/67:00 a.m.
YYZ
-
LAS
1 stop8h 55m
WestJet
Deal found 26/4C$ 314
Fri 15/512:35 p.m.
LAS
-
YYZ
Nonstop4h 25m
WestJet
Sat 16/512:40 p.m.
YYZ
-
LAS
2 stops12h 00m
WestJet
Deal found 26/4C$ 318
Fri 15/512:35 p.m.
LAS
-
YYZ
Nonstop4h 25m
WestJet
Fri 22/59:00 a.m.
YYZ
-
LAS
1 stop11h 15m
WestJet
Deal found 26/4C$ 321
Thu 28/54:30 p.m.
LAS
-
YYZ
Nonstop4h 24m
Multiple Airlines
Sat 6/61:30 p.m.
YYZ
-
LAS
1 stop11h 10m
Multiple Airlines
Deal found 28/4C$ 322
Fri 15/512:45 p.m.
LAS
-
YYZ
Nonstop4h 24m
Multiple Airlines
Wed 20/56:15 a.m.
YYZ
-
LAS
1 stop9h 15m
Multiple Airlines
Deal found 26/4C$ 324
Thu 28/54:30 p.m.
LAS
-
YYZ
Nonstop4h 24m
Multiple Airlines
Wed 3/67:00 a.m.
YYZ
-
LAS
2 stops11h 45m
Multiple Airlines
Deal found 24/4C$ 325
Tue 16/61:20 p.m.
LAS
-
YYZ
1 stop26h 45m
WestJet
Mon 22/67:00 a.m.
YYZ
-
LAS
2 stops11h 45m
WestJet
Deal found 24/4C$ 326
Thu 11/64:35 p.m.
LAS
-
YYZ
1 stop17h 10m
WestJet
Sun 14/61:30 p.m.
YYZ
-
LAS
1 stop11h 10m
WestJet
Deal found 28/4C$ 328
Thu 11/64:35 p.m.
LAS
-
YYZ
1 stop17h 10m
WestJet
Thu 18/610:00 a.m.
YYZ
-
LAS
1 stop10h 15m
WestJet
Deal found 27/4C$ 329
Wed 17/63:00 p.m.
LAX
-
YYZ
2 stops11h 10m
WestJet
Sun 21/66:15 a.m.
YYZ
-
LAX
1 stop9h 10m
WestJet
Deal found 24/4C$ 361

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 29 April 2026.

Round-trip from

C$ 311

One-way from

C$ 138

Popular in

December

Cheapest in

September

Average price

C$ 553

Good round-trip deal

C$ 424 or less

Good one-way deal

C$ 280 or less
WestJet
  • WestJet
  • 14/5-16/5
  • 3 total stops
  • 20h 35m total
  • California to Ontario
Search Deals
WestJet
  • WestJet
  • 11/10
  • 1 total stop
  • 8h 35m total
  • California to Ontario
Search Deals
Highest demand for flights based on searches. 8% potential increase in price (C$ 63 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (C$ 19 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 2026
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 29 April 2026.
Use the filters below to find and compare flights from California to Ontario that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Las VegasToronto

LAS - YYZ

LASYYZ

Las Vegas Harry Reid Intl

Tue 26/5

7:10 p.m.-9:54 a.m.

1 stop11h 44m

Toronto Pearson Intl

Tue 2/6

5:15 p.m.-9:54 p.m.

1 stop7h 39m

C$ 404

Las VegasToronto

LAS - YYZ

LASYYZ

Las Vegas Harry Reid Intl

Fri 5/6

7:25 p.m.-9:45 a.m.

1 stop11h 20m

Toronto Pearson Intl

Fri 12/6

8:00 a.m.-6:35 p.m.

1 stop13h 35m

C$ 404

Las VegasToronto

LAS - YYZ

LASYYZ

Las Vegas Harry Reid Intl

Tue 2/6

12:36 a.m.-10:44 p.m.

2 stops19h 08m

Toronto Pearson Intl

Fri 5/6

5:15 p.m.-9:54 p.m.

1 stop7h 39m

C$ 414

Las VegasToronto

LAS - YYZ

LASYYZ

Las Vegas Harry Reid Intl

Mon 15/6

12:36 a.m.-3:46 p.m.

1 stop12h 10m

Toronto Pearson Intl

Wed 17/6

5:15 p.m.-11:53 p.m.

1 stop9h 38m

C$ 415

Las VegasToronto

LAS - YYZ

LASYYZ

Las Vegas Harry Reid Intl

Wed 3/6

12:36 a.m.-9:54 a.m.

1 stop6h 18m

Toronto Pearson Intl

Fri 12/6

5:15 p.m.-11:53 p.m.

1 stop9h 38m

C$ 415

Las VegasToronto

LAS - YYZ

LASYYZ

Las Vegas Harry Reid Intl

Sat 6/6

12:36 a.m.-9:54 a.m.

1 stop6h 18m

Toronto Pearson Intl

Wed 10/6

11:00 a.m.-5:58 p.m.

1 stop9h 58m

C$ 415

Las VegasToronto

LAS - YYZ

LASYYZ

Las Vegas Harry Reid Intl

Mon 25/5

11:45 p.m.-1:47 p.m.

1 stop11h 02m

Toronto Pearson Intl

Mon 1/6

9:44 a.m.-10:19 p.m.

1 stop15h 35m

C$ 418

Las VegasToronto

LAS - YYZ

LASYYZ

Las Vegas Harry Reid Intl

Mon 25/5

11:45 p.m.-1:47 p.m.

1 stop11h 02m

Toronto Pearson Intl

Sun 31/5

6:10 a.m.-7:57 p.m.

1 stop16h 47m

C$ 421

San DiegoToronto

SAN - YYZ

SANYYZ

San Diego

Sat 3/10

10:30 p.m.-8:55 a.m.

1 stop7h 25m

Toronto Pearson Intl

Wed 7/10

6:15 a.m.-3:41 p.m.

1 stop12h 26m

C$ 479

San DiegoToronto

SAN - YYZ

SANYYZ

San Diego

Tue 22/9

9:05 p.m.-9:19 a.m.

1 stop9h 14m

Toronto Pearson Intl

Sat 26/9

1:00 p.m.-6:37 p.m.

1 stop8h 37m

C$ 479

Flights are sorted by cheapest round-trip flights first.

Deals found on 25/4

Showing 1-10 of 60 resultsSorted by cheapest first
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2
3
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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

How far ahead should I book a flight from California to Region of Ontario?

The best time to book flights from California to Region of Ontario is 77 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

What is the cheapest month to book a flight from California to Region of Ontario?

Currently, September is the cheapest month in which you can book a flight from California to Region of Ontario (average of C$ 481). Flying from California to Region of Ontario in December is currently the most expensive (average of C$ 960). 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 29 April 2026.

Unlike in the morning, when flights are generally more expensive, you can save up to 27% on flights from California to Region of Ontario by exploring options for tickets in the evening.

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 25 April 2026.

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

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 29 April 2026.
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
435 reviews
Check prices

Comfort

8.0

Overall

8.0

Food

7.6

Crew

8.6

Entertainment

7.0

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

John,Mar 2026

YYZ - PVR

I'm 6ft 4in. The seats don't have enough room. But was a good flight.
Porter Airlines
8.0
Very good
435 reviews
Porter Airlines
8.0
Very good
435 reviews
Check prices

Comfort

8.0

Overall

8.0

Food

7.6

Crew

8.6

Entertainment

7.0

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

John,Mar 2026

YYZ - PVR

I'm 6ft 4in. The seats don't have enough room. But was a good flight.
Air Transat
7.8
Good
543 reviews
Porter Airlines
8.0
Very good
435 reviews
Check prices

Comfort

8.0

Overall

8.0

Food

7.6

Crew

8.6

Entertainment

7.0

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

John,Mar 2026

YYZ - PVR

I'm 6ft 4in. The seats don't have enough room. But was a good flight.
United Airlines
7.4
Good
9,677 reviews
Porter Airlines
8.0
Very good
435 reviews
Check prices

Comfort

8.0

Overall

8.0

Food

7.6

Crew

8.6

Entertainment

7.0

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

John,Mar 2026

YYZ - PVR

I'm 6ft 4in. The seats don't have enough room. But was a good flight.
WestJet
7.2
Good
3,328 reviews
Porter Airlines
8.0
Very good
435 reviews
Check prices

Comfort

8.0

Overall

8.0

Food

7.6

Crew

8.6

Entertainment

7.0

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

John,Mar 2026

YYZ - PVR

I'm 6ft 4in. The seats don't have enough room. But was a good flight.
Air Canada
7.1
Good
10,982 reviews
Porter Airlines
8.0
Very good
435 reviews
Check prices

Comfort

8.0

Overall

8.0

Food

7.6

Crew

8.6

Entertainment

7.0

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

John,Mar 2026

YYZ - PVR

I'm 6ft 4in. The seats don't have enough room. But was a good flight.

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 7h 25m. WestJet provides one of the quickest options available for as low as C$ 479. Airlines will cover a distance of 3465 km. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

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

    C$ 82 is the cheapest one-way deal found within the past few days, from WestJet. You may also be able to find cheap deals on United Airlines and Porter Airlines, with prices starting from C$ 111 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, September is the cheapest month in which you can book a flight from California to Region of Ontario (average of C$ 481). Flying from California to Region of Ontario in December is currently the most expensive (average of C$ 960). 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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See prices for flight routes from nearby airports that may be better suited for you.
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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 629,999 searches. Data last updated 29 April 2026.
AirlineCheapestAverageFlexibilityOn-time
WestJetCheapestC$ 158AverageC$ 370FlexibilityNo cancel feeOn-time60%
Search WestJet flights
American AirlinesCheapestC$ 181AverageC$ 847FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
Air CanadaCheapestC$ 187AverageC$ 621FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
Porter AirlinesCheapestC$ 194AverageC$ 618FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights
DeltaCheapestC$ 221AverageC$ 303FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
Air TransatCheapestC$ 297AverageC$ 781FlexibilityNo cancel feeOn-time50%
Search Air Transat flights
United AirlinesCheapestC$ 341AverageC$ 692FlexibilityNo cancel feeOn-time69%
Search United Airlines 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.

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