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Cheap flights from California to Ontario from C$ 189

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 9/7. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — YYZ
13 Jul — 20 Jul1
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 13 June 2026.

Thu 2/78:30 a.m.
LAS
-
YYZ
2 stops12h 29m
WestJet
Fri 10/73:50 p.m.
YYZ
-
LAS
1 stop8h 50m
WestJet
Deal found 11/6C$ 368
Sat 22/88:30 a.m.
LAS
-
YYZ
2 stops12h 29m
WestJet
Fri 28/83:50 p.m.
YYZ
-
LAS
1 stop8h 50m
WestJet
Deal found 10/6C$ 369
Fri 3/78:30 a.m.
LAS
-
YYZ
2 stops12h 29m
WestJet
Wed 15/73:50 p.m.
YYZ
-
LAS
1 stop8h 50m
WestJet
Deal found 10/6C$ 371
Wed 8/71:45 p.m.
LAS
-
YYZ
2 stops12h 25m
WestJet
Mon 13/79:00 a.m.
YYZ
-
LAS
1 stop11h 15m
WestJet
Deal found 12/6C$ 373
Thu 2/71:45 p.m.
LAS
-
YYZ
2 stops12h 25m
WestJet
Wed 8/73:50 p.m.
YYZ
-
LAS
1 stop8h 50m
WestJet
Deal found 10/6C$ 375
Wed 8/71:45 p.m.
LAS
-
YYZ
2 stops12h 25m
WestJet
Wed 15/77:00 a.m.
YYZ
-
LAS
1 stop8h 55m
WestJet
Deal found 9/6C$ 376
Thu 2/78:30 a.m.
LAS
-
YYZ
1 stop8h 35m
WestJet
Thu 16/712:40 p.m.
YYZ
-
LAS
2 stops12h 00m
WestJet
Deal found 10/6C$ 378
Tue 25/81:45 p.m.
LAS
-
YYZ
1 stop8h 20m
WestJet
Thu 27/812:40 p.m.
YYZ
-
LAS
2 stops12h 00m
WestJet
Deal found 10/6C$ 379
Thu 6/81:45 p.m.
LAS
-
YYZ
2 stops12h 25m
WestJet
Thu 20/812:40 p.m.
YYZ
-
LAS
2 stops12h 00m
WestJet
Deal found 10/6C$ 383
Thu 23/71:45 p.m.
LAS
-
YYZ
1 stop8h 20m
WestJet
Sun 26/72:50 p.m.
YYZ
-
LAS
1 stop9h 50m
WestJet
Deal found 11/6C$ 385
Wed 26/811:59 p.m.
LAX
-
YTZ
1 stop14h 56m
Multiple Airlines
Tue 1/91:40 p.m.
YTZ
-
LAX
1 stop13h 03m
Multiple Airlines
Deal found 11/6C$ 470
Tue 1/911:59 p.m.
LAX
-
YTZ
1 stop11h 26m
Multiple Airlines
Tue 15/91:40 p.m.
YTZ
-
LAX
2 stops22h 32m
Multiple Airlines
Deal found 9/6C$ 481

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 13 June 2026.

Round-trip from

C$ 368

One-way from

C$ 189

Popular in

June

Cheapest in

September

Average price

C$ 705

Good round-trip deal

C$ 255 or less

Good one-way deal

C$ 287 or less
WestJet
  • WestJet
  • 2/7-10/7
  • 3 total stops
  • 21h 19m total
  • California to Ontario
Search Deals
Porter Airlines
  • Porter Airlines
  • 9/7
  • Nonstop
  • 4h 24m total
  • California to Ontario
Search Deals
Highest demand for flights based on searches. 11% potential increase in price (C$ 97 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 June 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 13 June 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

Sat 15/8

6:10 p.m.-11:55 a.m.

1 stop14h 45m

Toronto Pearson Intl

Sun 13/9

8:35 p.m.-10:22 p.m.

Nonstop4h 47m

C$ 436

Las VegasToronto

LAS - YYZ

LASYYZ

Las Vegas Harry Reid Intl

Sat 8/8

8:30 a.m.-11:59 p.m.

2 stops12h 29m

Toronto Pearson Intl

Wed 12/8

6:00 a.m.-12:55 p.m.

1 stop9h 55m

C$ 466

Las VegasToronto

LAS - YYZ

LASYYZ

Las Vegas Harry Reid Intl

Thu 2/7

11:27 a.m.-11:02 p.m.

1 stop8h 35m

Toronto Pearson Intl

Mon 6/7

12:09 p.m.-8:02 p.m.

1 stop10h 53m

C$ 498

Las VegasToronto

LAS - YYZ

LASYYZ

Las Vegas Harry Reid Intl

Fri 21/8

9:59 a.m.-11:03 p.m.

1 stop10h 04m

Toronto Pearson Intl

Sat 29/8

4:10 p.m.-8:21 p.m.

1 stop7h 11m

C$ 498

Las VegasToronto

LAS - YYZ

LASYYZ

Las Vegas Harry Reid Intl

Tue 14/7

11:30 p.m.-11:49 a.m.

1 stop9h 19m

Toronto Pearson Intl

Fri 17/7

8:35 p.m.-10:24 p.m.

Nonstop4h 49m

C$ 498

Las VegasToronto

LAS - YYZ

LASYYZ

Las Vegas Harry Reid Intl

Fri 3/7

5:50 a.m.-3:19 p.m.

1 stop6h 29m

Toronto Pearson Intl

Fri 10/7

5:45 p.m.-11:40 p.m.

1 stop8h 55m

C$ 498

Las VegasToronto

LAS - YYZ

LASYYZ

Las Vegas Harry Reid Intl

Fri 6/11

11:55 p.m.-11:48 a.m.

1 stop8h 53m

Toronto Pearson Intl

Sun 8/11

10:45 a.m.-5:01 p.m.

1 stop9h 16m

C$ 511

Las VegasToronto

LAS - YYZ

LASYYZ

Las Vegas Harry Reid Intl

Sat 4/7

1:36 p.m.-11:22 p.m.

1 stop6h 46m

Toronto Pearson Intl

Fri 10/7

5:30 p.m.-10:24 p.m.

1 stop7h 54m

C$ 511

Las VegasToronto

LAS - YYZ

LASYYZ

Las Vegas Harry Reid Intl

Tue 30/6

7:48 p.m.-7:00 a.m.

1 stop8h 12m

Toronto Pearson Intl

Sun 12/7

8:45 a.m.-6:56 p.m.

1 stop13h 11m

C$ 519

Las VegasToronto

LAS - YYZ

LASYYZ

Las Vegas Harry Reid Intl

Wed 22/7

7:00 a.m.-5:01 p.m.

1 stop7h 01m

Toronto Pearson Intl

Mon 27/7

5:15 p.m.-9:59 p.m.

1 stop7h 44m

C$ 519

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/6

Showing 1-10 of 60 resultsSorted by cheapest first
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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, September is the cheapest month in which you can book a flight from California to Region of Ontario (average of C$ 502). Flying from California to Region of Ontario in December is currently the most expensive (average of C$ 987). 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 13 June 2026.

Unlike at noon, 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.

How much does it cost to fly round-trip from California to Region of 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 45 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 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 13 June 2026.

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. Thursday afternoons 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 13 June 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
438 reviews
Check prices

Comfort

8.0

Entertainment

6.9

Crew

8.6

Boarding

8.2

Overall

8.0

Food

7.6

Reviews

1 / 20
6.0
Good

Justin,May 2026

YYZ - MCO

Staff very nice. Seats were uncomfortable. Complimentary snacks leave much to be desired.
Porter Airlines
8.0
Very good
438 reviews
Porter Airlines
8.0
Very good
438 reviews
Check prices

Comfort

8.0

Entertainment

6.9

Crew

8.6

Boarding

8.2

Overall

8.0

Food

7.6

Reviews

1 / 20
6.0
Good

Justin,May 2026

YYZ - MCO

Staff very nice. Seats were uncomfortable. Complimentary snacks leave much to be desired.
Air Transat
7.8
Good
555 reviews
Porter Airlines
8.0
Very good
438 reviews
Check prices

Comfort

8.0

Entertainment

6.9

Crew

8.6

Boarding

8.2

Overall

8.0

Food

7.6

Reviews

1 / 20
6.0
Good

Justin,May 2026

YYZ - MCO

Staff very nice. Seats were uncomfortable. Complimentary snacks leave much to be desired.
United Airlines
7.4
Good
9,815 reviews
Porter Airlines
8.0
Very good
438 reviews
Check prices

Comfort

8.0

Entertainment

6.9

Crew

8.6

Boarding

8.2

Overall

8.0

Food

7.6

Reviews

1 / 20
6.0
Good

Justin,May 2026

YYZ - MCO

Staff very nice. Seats were uncomfortable. Complimentary snacks leave much to be desired.
WestJet
7.2
Good
3,359 reviews
Porter Airlines
8.0
Very good
438 reviews
Check prices

Comfort

8.0

Entertainment

6.9

Crew

8.6

Boarding

8.2

Overall

8.0

Food

7.6

Reviews

1 / 20
6.0
Good

Justin,May 2026

YYZ - MCO

Staff very nice. Seats were uncomfortable. Complimentary snacks leave much to be desired.
Air Canada
7.1
Good
11,172 reviews
Porter Airlines
8.0
Very good
438 reviews
Check prices

Comfort

8.0

Entertainment

6.9

Crew

8.6

Boarding

8.2

Overall

8.0

Food

7.6

Reviews

1 / 20
6.0
Good

Justin,May 2026

YYZ - MCO

Staff very nice. Seats were uncomfortable. Complimentary snacks leave much to be desired.

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 5h 13m. WestJet provides one of the quickest options available for as low as C$ 614. Airlines will cover a distance of 3626 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$ 85 is the cheapest one-way deal found within the past few days, from WestJet. You may also be able to find cheap deals on Porter Airlines and Delta, with prices starting from C$ 112 and C$ 123, 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$ 502). Flying from California to Region of Ontario in December is currently the most expensive (average of C$ 987). 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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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 13 June 2026.
AirlineCheapestAverageFlexibilityOn-time
WestJetCheapestC$ 152AverageC$ 383FlexibilityNo cancel feeOn-time60%
Search WestJet flights
Porter AirlinesCheapestC$ 199AverageC$ 583FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights
Air CanadaCheapestC$ 215AverageC$ 681FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
Air TransatCheapestC$ 383AverageC$ 802FlexibilityNo cancel feeOn-time50%
Search Air Transat flights
United AirlinesCheapestC$ 387AverageC$ 867FlexibilityNo 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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