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Cheap flights from California to Ontario from C$ 114

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 9/3. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — YYZ
26 Feb — 5 Mar1
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 27 January 2026.

Wed 18/38:05 a.m.
LAS
-
YYZ
2 stops12h 33m
WestJet
Mon 23/38:00 p.m.
YYZ
-
LAS
Nonstop5h 12m
WestJet
Deal found 25/1C$ 227
Fri 27/211:05 p.m.
LAS
-
YYZ
Nonstop4h 15m
Porter Airlines
Thu 5/38:35 p.m.
YYZ
-
LAS
Nonstop5h 07m
Porter Airlines
Deal found 26/1C$ 234
Fri 13/311:25 p.m.
LAS
-
YYZ
Nonstop4h 18m
WestJet
Fri 20/38:00 p.m.
YYZ
-
LAS
Nonstop5h 12m
WestJet
Deal found 26/1C$ 236
Fri 13/311:25 p.m.
LAS
-
YYZ
Nonstop4h 18m
WestJet
Thu 19/38:00 p.m.
YYZ
-
LAS
Nonstop5h 12m
WestJet
Deal found 24/1C$ 241
Fri 27/27:05 p.m.
LAS
-
YYZ
1 stop8h 08m
Multiple Airlines
Thu 5/38:35 p.m.
YYZ
-
LAS
Nonstop5h 07m
Multiple Airlines
Deal found 26/1C$ 244
Thu 12/38:05 a.m.
LAS
-
YYZ
1 stop8h 31m
WestJet
Thu 19/38:00 p.m.
YYZ
-
LAS
Nonstop5h 12m
WestJet
Deal found 25/1C$ 246
Fri 10/411:25 p.m.
LAS
-
YYZ
Nonstop4h 18m
WestJet
Mon 13/412:30 p.m.
YYZ
-
LAS
1 stop10h 46m
WestJet
Deal found 26/1C$ 251
Mon 2/39:12 a.m.
LAX
-
YYZ
1 stop18h 31m
Multiple Airlines
Tue 10/310:00 a.m.
YYZ
-
LAX
Nonstop5h 39m
Multiple Airlines
Deal found 26/1C$ 315
Mon 23/24:07 p.m.
LAX
-
YYZ
1 stop11h 36m
Multiple Airlines
Wed 25/210:00 a.m.
YYZ
-
LAX
Nonstop5h 36m
Multiple Airlines
Deal found 26/1C$ 320
Fri 17/41:40 p.m.
LAX
-
YYZ
Nonstop4h 42m
Multiple Airlines
Sun 19/41:30 p.m.
YYZ
-
LAX
1 stop11h 33m
Multiple Airlines
Deal found 25/1C$ 323
Mon 16/33:30 p.m.
ONT
-
YYZ
1 stop12h 13m
Multiple Airlines
Mon 23/38:00 p.m.
YYZ
-
ONT
1 stop20h 28m
Multiple Airlines
Deal found 26/1C$ 325
Thu 16/411:50 a.m.
LAX
-
YYZ
1 stop9h 05m
Multiple Airlines
Tue 21/410:00 a.m.
YYZ
-
LAX
Nonstop5h 39m
Multiple Airlines
Deal found 26/1C$ 334

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 27 January 2026.

Round-trip from

C$ 227

One-way from

C$ 114

Popular in

December

Cheapest in

June

Average price

C$ 479

Good round-trip deal

C$ 148 or less

Good one-way deal

C$ 205 or less
WestJet
  • WestJet
  • 18/3-23/3
  • 2 total stops
  • 17h 45m total
  • California to Ontario
Search Deals
Porter Airlines
  • Porter Airlines
  • 9/3
  • Nonstop
  • 4h 15m total
  • California to Ontario
Search Deals
Highest demand for flights based on searches. 17% potential increase in price (C$ 131 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (C$ 23 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 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 27 January 2026.
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

Fri 27/3

11:25 p.m.-6:43 a.m.

Nonstop4h 18m

Toronto Pearson Intl

Tue 31/3

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

Nonstop5h 07m

C$ 253

Las VegasToronto

LAS - YYZ

LASYYZ

Las Vegas Harry Reid Intl

Wed 18/3

8:05 a.m.-11:38 p.m.

2 stops12h 33m

Toronto Pearson Intl

Thu 19/3

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

Nonstop5h 12m

C$ 257

Las VegasToronto

LAS - YYZ

LASYYZ

Las Vegas Harry Reid Intl

Wed 18/3

8:05 a.m.-11:38 p.m.

2 stops12h 33m

Toronto Pearson Intl

Sat 21/3

7:55 p.m.-10:02 p.m.

Nonstop5h 07m

C$ 266

Las VegasToronto

LAS - YYZ

LASYYZ

Las Vegas Harry Reid Intl

Fri 6/3

9:15 p.m.-12:40 a.m.

1 stop24h 25m

Toronto Pearson Intl

Wed 11/3

8:00 a.m.-6:13 p.m.

2 stops13h 13m

C$ 285

Las VegasToronto

LAS - YYZ

LASYYZ

Las Vegas Harry Reid Intl

Fri 13/3

8:05 a.m.-11:38 p.m.

2 stops12h 33m

Toronto Pearson Intl

Thu 19/3

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

Nonstop5h 12m

C$ 286

Las VegasToronto

LAS - YYZ

LASYYZ

Las Vegas Harry Reid Intl

Fri 13/3

8:05 a.m.-11:35 p.m.

2 stops12h 30m

Toronto Pearson Intl

Fri 20/3

9:40 a.m.-8:16 p.m.

2 stops13h 36m

C$ 288

Las VegasToronto

LAS - YYZ

LASYYZ

Las Vegas Harry Reid Intl

Fri 27/3

11:25 p.m.-6:43 a.m.

Nonstop4h 18m

Toronto Pearson Intl

Tue 31/3

9:40 a.m.-9:33 p.m.

2 stops14h 53m

C$ 290

Las VegasToronto

LAS - YYZ

LASYYZ

Las Vegas Harry Reid Intl

Thu 5/2

9:15 p.m.-1:40 p.m.

1 stop13h 25m

Toronto Pearson Intl

Sun 8/2

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

Nonstop5h 12m

C$ 296

Las VegasToronto

LAS - YYZ

LASYYZ

Las Vegas Harry Reid Intl

Thu 26/2

11:45 p.m.-7:00 a.m.

Nonstop4h 15m

Toronto Pearson Intl

Thu 5/3

8:35 p.m.-10:42 p.m.

Nonstop5h 07m

C$ 298

Las VegasToronto

LAS - YYZ

LASYYZ

Las Vegas Harry Reid Intl

Sun 15/2

9:00 a.m.-9:44 p.m.

1 stop9h 44m

Toronto Pearson Intl

Thu 26/2

8:25 p.m.-10:31 p.m.

Nonstop5h 06m

C$ 304

Flights are sorted by cheapest round-trip flights first.

Deals found on 27/1

Showing 1-10 of 60 results
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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, June is the cheapest month in which you can book a flight from California to Region of Ontario (average of C$ 101). Flying from California to Region of Ontario in December is currently the most expensive (average of C$ 211). 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 27 January 2026.

Unlike in the morning, when flights are generally more expensive, you can save up to 21% 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 24 January 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. 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 27 January 2026.

The most flights from USCA to CAON are scheduled on a Monday (19 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (4 on average).

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 27 January 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
7.9
Good
412 reviews
Check prices

Boarding

8.2

Crew

8.6

Food

7.5

Comfort

7.9

Overall

7.9

Entertainment

6.9

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
7.9
Good
412 reviews
Porter Airlines
7.9
Good
412 reviews
Check prices

Boarding

8.2

Crew

8.6

Food

7.5

Comfort

7.9

Overall

7.9

Entertainment

6.9

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
7.7
Good
501 reviews
Porter Airlines
7.9
Good
412 reviews
Check prices

Boarding

8.2

Crew

8.6

Food

7.5

Comfort

7.9

Overall

7.9

Entertainment

6.9

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
9,205 reviews
Porter Airlines
7.9
Good
412 reviews
Check prices

Boarding

8.2

Crew

8.6

Food

7.5

Comfort

7.9

Overall

7.9

Entertainment

6.9

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
3,251 reviews
Porter Airlines
7.9
Good
412 reviews
Check prices

Boarding

8.2

Crew

8.6

Food

7.5

Comfort

7.9

Overall

7.9

Entertainment

6.9

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
10,660 reviews
Porter Airlines
7.9
Good
412 reviews
Check prices

Boarding

8.2

Crew

8.6

Food

7.5

Comfort

7.9

Overall

7.9

Entertainment

6.9

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 6h 08m. WestJet provides one of the quickest options available for as low as C$ 441. Airlines will cover a distance of 3492 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$ 80 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$ 113, 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, June is the cheapest month in which you can book a flight from California to Region of Ontario (average of C$ 101). Flying from California to Region of Ontario in December is currently the most expensive (average of C$ 211). 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.
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Top 6 airlines flying from California to Ontario

Discover the top 6 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 27 January 2026.
AirlineCheapestAverageFlexibilityOn-time
Porter AirlinesCheapestC$ 145AverageC$ 469FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights
United AirlinesCheapestC$ 160AverageC$ 519FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Air CanadaCheapestC$ 161AverageC$ 639FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
Air TransatCheapestC$ 175AverageC$ 783FlexibilityNo cancel feeOn-time50%
Search Air Transat flights
WestJetCheapestC$ 215AverageC$ 358FlexibilityNo cancel feeOn-time60%
Search WestJet flights
DeltaCheapestC$ 222AverageC$ 320FlexibilityNo cancel feeOn-timeN/A
Search Delta 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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