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Cheap flights from Ontario to California from C$ 146

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 8/3. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — LAX
28 Nov — 5 Dec1
1 adult
1 adult, Economy, 0 bags

Find flight deals from Ontario to California

Enter your travel dates to find the best prices.

Cheapest flights from Ontario to California
Explore the most affordable flight options available from Ontario to California. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 29 October 2025.

Thu 4/129:35 a.m.YYZ - LAS
Nonstop5h 07mPorter Airlines
Sun 7/1211:05 p.m.LAS - YYZ
Nonstop4h 15mPorter Airlines
Deal found 27/10C$ 266
Mon 1/127:55 p.m.YYZ - LAS
Nonstop5h 07mPorter Airlines
Fri 5/1211:05 p.m.LAS - YYZ
Nonstop4h 15mPorter Airlines
Deal found 28/10C$ 267
Mon 24/117:55 p.m.YYZ - LAS
Nonstop5h 07mPorter Airlines
Mon 1/1211:05 p.m.LAS - YYZ
Nonstop4h 15mPorter Airlines
Deal found 27/10C$ 269
Tue 25/119:35 a.m.YYZ - LAS
Nonstop5h 07mPorter Airlines
Fri 28/1112:40 p.m.LAS - YYZ
Nonstop4h 15mPorter Airlines
Deal found 28/10C$ 270
Mon 17/117:55 p.m.YYZ - LAS
Nonstop5h 07mPorter Airlines
Fri 21/1111:05 p.m.LAS - YYZ
Nonstop4h 15mPorter Airlines
Deal found 27/10C$ 272
Thu 27/117:55 p.m.YYZ - LAS
Nonstop5h 07mPorter Airlines
Sat 29/113:45 p.m.LAS - YYZ
Nonstop4h 15mPorter Airlines
Deal found 26/10C$ 273
Mon 8/121:30 p.m.YYZ - LAS
1 stop9h 45mWestJet
Fri 12/127:05 p.m.LAS - YYZ
1 stop8h 53mWestJet
Deal found 29/10C$ 274
Thu 27/117:55 p.m.YYZ - LAS
Nonstop5h 07mPorter Airlines
Tue 2/123:45 p.m.LAS - YYZ
Nonstop4h 15mPorter Airlines
Deal found 27/10C$ 276
Mon 8/127:55 p.m.YYZ - LAS
Nonstop5h 07mPorter Airlines
Fri 12/1211:05 p.m.LAS - YYZ
Nonstop4h 15mPorter Airlines
Deal found 29/10C$ 277
Mon 1/127:55 p.m.YYZ - LAS
Nonstop5h 07mPorter Airlines
Sat 6/1211:05 p.m.LAS - YYZ
Nonstop4h 15mPorter Airlines
Deal found 28/10C$ 280
Mon 8/123:30 p.m.YTZ - LAS
1 stop8h 09mAir Canada
Thu 11/124:45 p.m.LAS - YTZ
2 stops15h 57mAir Canada
Deal found 28/10C$ 290
Thu 27/1110:00 a.m.YYZ - LAX
Nonstop5h 36mPorter Airlines
Thu 4/121:40 p.m.LAX - YYZ
Nonstop4h 43mPorter Airlines
Deal found 28/10C$ 311

Cheap flight deals from Ontario to California

Keep the following information in mind while searching for Ontario to California flight deals. Data was last updated 29 October 2025.

Round-trip from

C$ 231

One-way from

C$ 146

Popular in

December

Cheapest in

May

Average price

C$ 396

Good round-trip deal

C$ 382 or less

Good one-way deal

C$ 215 or less
WestJet
  • WestJet
  • 8/1-12/1
  • Nonstop
  • 9h 31m total
  • Ontario to California
Search Deals
WestJet
  • WestJet
  • 8/3
  • Nonstop
  • 5h 12m total
  • Ontario to California
Search Deals
Highest demand for flights based on searches. 9% potential increase in price (C$ 60 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (C$ 24 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
Search Deals
Price to beat on a round-trip flight from Ontario to California.
Search Deals
Price to beat on a one-way flight from Ontario to California.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ontario to California 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 October 2025.
Use the filters below to find and compare flights from Ontario to California that are best for you.

Fly from

Ontario

Fly to

California

Route

Depart

Return

Price

TorontoLas Vegas

YYZ - LAS

YYZLAS

Toronto Pearson Intl

Thu 19/2

3:45 p.m.-11:31 p.m.

1 stop10h 46m

Las Vegas Harry Reid Intl

Sun 22/2

6:59 p.m.-2:20 p.m.

1 stop16h 21m

C$ 301

TorontoLas Vegas

YYZ - LAS

YYZLAS

Toronto Pearson Intl

Tue 24/3

9:35 a.m.-11:42 a.m.

Nonstop5h 07m

Las Vegas Harry Reid Intl

Wed 25/3

12:40 p.m.-7:55 p.m.

Nonstop4h 15m

C$ 319

TorontoLas Vegas

YYZ - LAS

YYZLAS

Toronto Pearson Intl

Fri 27/2

3:45 p.m.-11:31 p.m.

1 stop10h 46m

Las Vegas Harry Reid Intl

Mon 2/3

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

1 stop10h 21m

C$ 319

TorontoLas Vegas

YYZ - LAS

YYZLAS

Toronto Pearson Intl

Mon 24/11

3:45 p.m.-9:35 p.m.

1 stop8h 50m

Las Vegas Harry Reid Intl

Thu 27/11

5:55 a.m.-3:02 p.m.

1 stop6h 07m

C$ 326

TorontoLas Vegas

YYZ - LAS

YYZLAS

Toronto Pearson Intl

Thu 19/2

11:00 a.m.-8:15 p.m.

2 stops12h 15m

Las Vegas Harry Reid Intl

Sun 22/2

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

1 stop10h 21m

C$ 327

TorontoLas Vegas

YYZ - LAS

YYZLAS

Toronto Pearson Intl

Tue 24/3

4:00 p.m.-11:55 p.m.

2 stops10h 55m

Las Vegas Harry Reid Intl

Mon 30/3

12:30 a.m.-9:55 a.m.

1 stop6h 25m

C$ 327

TorontoLas Vegas

YYZ - LAS

YYZLAS

Toronto Pearson Intl

Wed 28/1

4:10 p.m.-11:59 p.m.

2 stops10h 49m

Las Vegas Harry Reid Intl

Sun 1/2

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

1 stop10h 21m

C$ 327

TorontoLas Vegas

YYZ - LAS

YYZLAS

Toronto Pearson Intl

Sun 22/2

6:10 a.m.-8:23 p.m.

1 stop17h 13m

Las Vegas Harry Reid Intl

Tue 24/2

1:55 p.m.-11:46 p.m.

1 stop6h 51m

C$ 327

TorontoLas Vegas

YYZ - LAS

YYZLAS

Toronto Pearson Intl

Wed 21/1

2:45 p.m.-9:59 p.m.

2 stops10h 14m

Las Vegas Harry Reid Intl

Fri 23/1

12:59 a.m.-2:01 p.m.

2 stops10h 02m

C$ 327

TorontoLas Vegas

YYZ - LAS

YYZLAS

Toronto Pearson Intl

Thu 2/4

4:00 p.m.-9:59 p.m.

1 stop8h 59m

Las Vegas Harry Reid Intl

Sat 11/4

6:55 p.m.-3:12 p.m.

2 stops17h 17m

C$ 327

Flights are sorted by cheapest round-trip flights first.

Deals found on 29/10

Showing 1-10 of 60 results
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Best time to book a flight from Ontario to California

Have a flexible travel schedule? Discover the best time to fly to California from Ontario 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 Ontario to California

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

Currently, August is the cheapest month in which you can book a flight from Region of Ontario to California (average of C$ 111). Flying from Region of Ontario to California in March is currently the most expensive (average of C$ 258). 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 ON to CA?

Find hourly flight availability from Ontario to California. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 29 October 2025.

It’s optimal to fly from Region of Ontario to California in the evening. By choosing this option you can save up to 17% on the cost of your flight, compared to a flight in the afternoon.

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

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

Travelers seeking maximum savings on their Region of Ontario to California flight should consider departing on Thursday afternoons 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.

How much does it cost to fly round-trip from Region of Ontario to California?

Reviews of airlines servicing California

Get insights into the airlines that provide service to California. 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 California. Reviews last updated 29 October 2025.
Check out reviews from past customers who have flown with Porter Airlines,Air Transat, andUnited Airlines from Ontario to California to help guide your decision. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Porter Airlines
8.0
Very good
384 reviews
Check prices

Crew

8.6

Entertainment

7.0

Food

7.6

Overall

8.0

Boarding

8.2

Comfort

8.0

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
Check prices

Crew

8.6

Entertainment

7.0

Food

7.6

Overall

8.0

Boarding

8.2

Comfort

8.0

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 Transat
7.8
Good
469 reviews
Porter Airlines
8.0
Very good
384 reviews
Check prices

Crew

8.6

Entertainment

7.0

Food

7.6

Overall

8.0

Boarding

8.2

Comfort

8.0

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
Check prices

Crew

8.6

Entertainment

7.0

Food

7.6

Overall

8.0

Boarding

8.2

Comfort

8.0

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
Check prices

Crew

8.6

Entertainment

7.0

Food

7.6

Overall

8.0

Boarding

8.2

Comfort

8.0

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
Check prices

Crew

8.6

Entertainment

7.0

Food

7.6

Overall

8.0

Boarding

8.2

Comfort

8.0

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 Ontario to California. 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 Region of Ontario to California?

    United Airlines, Porter Airlines, and Air Canada can get you from Region of Ontario to California in just under 5h 07m. Your travel time can differ by up to 5h 39m. The distance between Region of Ontario and California is about 3119 km. This flight may include one or multiple stops.

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

    For one-way options, check prices for Porter Airlines. According to our data, you can fly for as low as C$ 156. Users have also found prices from C$ 164 and C$ 185 on WestJet and Air Canada, respectively.

  • Can I find deals for flights from Ontario to California that include hotel bookings?

    Yes. In addition to deals on Ontario to California flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ontario to California?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to California.

  • Can I find deals for business class flights from Ontario to California?

    Yes. Cheapflights offers flight deals from Ontario to California 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 Region of Ontario to California?

    Currently, August is the cheapest month in which you can book a flight from Region of Ontario to California (average of C$ 111). Flying from Region of Ontario to California in March is currently the most expensive (average of C$ 258). 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 Ontario to California

See prices for flight routes from nearby airports that may be better suited for you.
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Top 9 airlines flying from Ontario to California

Discover the top 9 airlines that operate flights from Ontario to California. 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 October 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapestC$ 133AverageC$ 598FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
WestJetCheapestC$ 198AverageC$ 478FlexibilityNo cancel feeOn-time60%
Search WestJet flights
Air CanadaCheapestC$ 202AverageC$ 564FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
Porter AirlinesCheapestC$ 225AverageC$ 461FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights
DeltaCheapestC$ 230AverageC$ 493FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
Air TransatCheapestC$ 240AverageC$ 507FlexibilityNo cancel feeOn-time50%
Search Air Transat flights
United AirlinesCheapestC$ 288AverageC$ 611FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Alaska AirlinesCheapestC$ 338AverageC$ 722FlexibilityNo cancel feeOn-time75%
Search Alaska Airlines flights
APG AirlinesCheapestC$ 615AverageC$ 616FlexibilityNo cancel feeOn-timeN/A
Search APG 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 Ontario to California?

Cheapflights makes it easy to find Ontario to California flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

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

Cheapflights simply makes it quick and affordable to book flights from Ontario to California by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

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

Cheapflights does show flights with no change fees to all users. To see these options for flights from Ontario to California, users can toggle the no change fees filter when performing a flight search.

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

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

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