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Cheap flights from Ontario to California from C$ 125

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 19/10. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — LAX
11 Oct — 18 Oct1
1 adult
1 adult, Economy

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 11 September 2025.

Round-trip from

C$ 186

One-way from

C$ 125

Popular in

December

Cheapest in

September

Average price

C$ 327

Good round-trip deal

C$ 374 or less

Good one-way deal

C$ 220 or less
WestJet
  • WestJet
  • 19/10-24/10
  • 4 total stops
  • 23h 41m total
  • Ontario to California
Search Deals
WestJet
  • WestJet
  • 19/10
  • 2 total stops
  • 12h 01m total
  • Ontario to California
Search Deals
Highest demand for flights based on searches. 9% potential increase in price (C$ 61 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 September 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

Find flight deals from Ontario to California

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 11 September 2025.

Sun 19/106:00 a.m.YHM - LAS
2 stops12h 01mWestJet
Fri 24/1010:00 a.m.LAS - YHM
2 stops11h 40mWestJet
Deal found 9/9C$ 186
Sun 12/106:00 a.m.YHM - LAS
2 stops12h 01mWestJet
Wed 15/1011:30 a.m.LAS - YHM
1 stop10h 10mWestJet
Deal found 9/9C$ 190
Sun 5/106:00 a.m.YHM - LAS
2 stops12h 01mWestJet
Wed 8/1011:30 a.m.LAS - YHM
1 stop10h 10mWestJet
Deal found 9/9C$ 193
Sun 5/106:00 a.m.YHM - LAS
2 stops12h 01mWestJet
Sat 11/1011:30 a.m.LAS - YHM
1 stop10h 10mWestJet
Deal found 9/9C$ 197
Sun 5/106:00 a.m.YHM - LAS
2 stops12h 01mWestJet
Tue 7/1011:30 a.m.LAS - YHM
1 stop10h 10mWestJet
Deal found 9/9C$ 220
Mon 22/93:00 p.m.YYZ - LAX
1 stop9h 46mWestJet
Thu 25/97:00 a.m.LAX - YYZ
2 stops11h 01mWestJet
Deal found 10/9C$ 233
Sat 27/96:00 a.m.YHM - LAS
2 stops30h 08mWestJet
Fri 3/1010:00 a.m.LAS - YHM
2 stops11h 40mWestJet
Deal found 9/9C$ 233
Fri 26/97:45 p.m.YYZ - LAX
Nonstop5h 26mWestJet
Thu 2/107:00 a.m.LAX - YYZ
2 stops11h 01mWestJet
Deal found 11/9C$ 234
Mon 6/109:00 a.m.YYZ - LAX
2 stops15h 46mWestJet
Sun 19/107:00 a.m.LAX - YYZ
2 stops14h 31mWestJet
Deal found 11/9C$ 236
Thu 27/119:40 a.m.YYZ - LAX
2 stops11h 52mWestJet
Tue 2/1211:50 a.m.LAX - YYZ
2 stops15h 23mWestJet
Deal found 11/9C$ 237
Sun 12/106:00 a.m.YHM - LAS
2 stops12h 01mWestJet
Sat 18/1011:30 a.m.LAS - YHM
1 stop10h 10mWestJet
Deal found 9/9C$ 237
Fri 17/102:00 p.m.YYZ - LAX
1 stop9h 21mWestJet
Sun 19/107:00 a.m.LAX - YYZ
2 stops14h 31mWestJet
Deal found 11/9C$ 238

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 11 September 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

HamiltonLas Vegas

YHM - LAS

YHMLAS

Hamilton

Sun 12/10

6:00 a.m.-3:01 p.m.

2 stops12h 01m

Las Vegas Harry Reid Intl

Wed 15/10

11:30 a.m.-12:40 a.m.

1 stop10h 10m

C$ 190

TorontoLas Vegas

YTZ - LAS

YTZLAS

Toronto Island

Fri 24/10

5:25 p.m.-10:22 p.m.

1 stop7h 57m

Las Vegas Harry Reid Intl

Tue 28/10

9:10 a.m.-9:35 p.m.

1 stop9h 25m

C$ 252

HamiltonLas Vegas

YHM - LAS

YHMLAS

Hamilton

Thu 23/10

6:00 a.m.-3:01 p.m.

2 stops12h 01m

Las Vegas Harry Reid Intl

Sun 26/10

7:05 p.m.-5:17 p.m.

1 stop19h 12m

C$ 258

HamiltonLas Vegas

YHM - LAS

YHMLAS

Hamilton

Sun 19/10

6:00 a.m.-3:01 p.m.

2 stops12h 01m

Las Vegas Harry Reid Intl

Fri 24/10

8:00 a.m.-12:40 a.m.

1 stop13h 40m

C$ 259

TorontoLas Vegas

YYZ - LAS

YYZLAS

Toronto Pearson Intl

Sat 18/10

10:05 a.m.-9:59 p.m.

1 stop14h 54m

Las Vegas Harry Reid Intl

Mon 20/10

12:59 a.m.-2:30 p.m.

1 stop10h 31m

C$ 263

HamiltonLas Vegas

YHM - LAS

YHMLAS

Hamilton

Wed 3/12

6:10 p.m.-12:19 p.m.

2 stops21h 09m

Las Vegas Harry Reid Intl

Sat 6/12

9:15 p.m.-5:17 p.m.

2 stops17h 02m

C$ 265

HamiltonLas Vegas

YHM - LAS

YHMLAS

Hamilton

Wed 22/10

6:00 a.m.-5:34 p.m.

1 stop14h 34m

Las Vegas Harry Reid Intl

Thu 23/10

11:30 a.m.-12:40 a.m.

1 stop10h 10m

C$ 266

HamiltonLas Vegas

YHM - LAS

YHMLAS

Hamilton

Tue 23/9

6:00 a.m.-9:29 p.m.

1 stop18h 29m

Las Vegas Harry Reid Intl

Wed 24/9

11:30 a.m.-12:40 a.m.

1 stop10h 10m

C$ 266

TorontoLas Vegas

YTZ - LAS

YTZLAS

Toronto Island

Sat 4/10

5:25 p.m.-10:22 p.m.

1 stop7h 57m

Las Vegas Harry Reid Intl

Wed 8/10

11:15 p.m.-11:45 a.m.

1 stop9h 30m

C$ 269

TorontoLas Vegas

YYZ - LAS

YYZLAS

Toronto Pearson Intl

Wed 1/10

8:00 a.m.-8:21 p.m.

2 stops15h 21m

Las Vegas Harry Reid Intl

Sat 4/10

8:00 a.m.-8:52 p.m.

1 stop9h 52m

C$ 269

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/9

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, May is the cheapest month in which you can book a flight from Region of Ontario to California (average of C$ 231). Flying from Region of Ontario to California in March is currently the most expensive (average of C$ 296). 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 11 September 2025.

When flying from Region of Ontario to California, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Weekly flight availability from Region of Ontario to California

Explore weekly flight availability from Ontario to California. 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 11 September 2025.

The most flights from CAON to USCA are scheduled on a Tuesday (22 on average). You will have fewer flight options on Friday, which is when the least amount of flights are scheduled (14 on average).

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 11 September 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
7.9
Good
363 reviews
Check prices

Entertainment

7.0

Food

7.6

Overall

7.9

Comfort

7.9

Crew

8.6

Boarding

8.1

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
7.9
Good
363 reviews
Porter Airlines
7.9
Good
363 reviews
Check prices

Entertainment

7.0

Food

7.6

Overall

7.9

Comfort

7.9

Crew

8.6

Boarding

8.1

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
7.7
Good
438 reviews
Porter Airlines
7.9
Good
363 reviews
Check prices

Entertainment

7.0

Food

7.6

Overall

7.9

Comfort

7.9

Crew

8.6

Boarding

8.1

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
8,937 reviews
Porter Airlines
7.9
Good
363 reviews
Check prices

Entertainment

7.0

Food

7.6

Overall

7.9

Comfort

7.9

Crew

8.6

Boarding

8.1

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
3,091 reviews
Porter Airlines
7.9
Good
363 reviews
Check prices

Entertainment

7.0

Food

7.6

Overall

7.9

Comfort

7.9

Crew

8.6

Boarding

8.1

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
10,000 reviews
Porter Airlines
7.9
Good
363 reviews
Check prices

Entertainment

7.0

Food

7.6

Overall

7.9

Comfort

7.9

Crew

8.6

Boarding

8.1

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?

    WestJet, Air Canada, and United Airlines can get you from Region of Ontario to California in just under 7h 57m. Your travel time can differ by up to 6h 57m. The distance between Region of Ontario and California is about 3137 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 WestJet. According to our data, you can fly for as low as C$ 125. Users have also found prices from C$ 157 and C$ 157 on Air Canada and United Airlines, 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, May is the cheapest month in which you can book a flight from Region of Ontario to California (average of C$ 231). Flying from Region of Ontario to California in March is currently the most expensive (average of C$ 296). 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 11 September 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapestC$ 133AverageC$ 602FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
WestJetCheapestC$ 199AverageC$ 472FlexibilityNo cancel feeOn-time60%
Search WestJet flights
Porter AirlinesCheapestC$ 226AverageC$ 459FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights
DeltaCheapestC$ 234AverageC$ 509FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
Air TransatCheapestC$ 251AverageC$ 503FlexibilityNo cancel feeOn-time50%
Search Air Transat flights
United AirlinesCheapestC$ 286AverageC$ 622FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Air CanadaCheapestC$ 298AverageC$ 606FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
Alaska AirlinesCheapestC$ 390AverageC$ 713FlexibilityNo cancel feeOn-time75%
Search Alaska Airlines flights
APG AirlinesCheapestC$ 612AverageC$ 613FlexibilityNo 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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