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Cheap flights from California to Ontario from C$ 108

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 29/4. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — YYZ
14 Apr — 21 Apr1
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 15 March 2026.

Wed 15/48:05 a.m.
LAS
-
YYZ
2 stops12h 30m
WestJet
Tue 28/410:50 a.m.
YYZ
-
LAS
1 stop9h 25m
WestJet
Deal found 12/3C$ 274
Sat 18/48:05 a.m.
LAS
-
YYZ
1 stop8h 31m
WestJet
Sun 26/47:00 a.m.
YYZ
-
LAS
2 stops12h 35m
WestJet
Deal found 12/3C$ 276
Fri 17/47:05 p.m.
LAS
-
YYZ
1 stop8h 08m
WestJet
Mon 20/412:30 p.m.
YYZ
-
LAS
1 stop10h 46m
WestJet
Deal found 10/3C$ 277
Fri 10/48:05 a.m.
LAS
-
YYZ
1 stop8h 31m
WestJet
Mon 13/410:00 a.m.
YYZ
-
LAS
2 stops13h 16m
WestJet
Deal found 13/3C$ 283
Mon 20/411:25 p.m.
LAS
-
YYZ
Nonstop4h 18m
WestJet
Tue 28/49:45 a.m.
YYZ
-
LAS
Nonstop4h 55m
WestJet
Deal found 12/3C$ 285
Sat 18/411:05 p.m.
LAS
-
YYZ
Nonstop4h 15m
Multiple Airlines
Mon 27/410:50 a.m.
YYZ
-
LAS
1 stop9h 25m
Multiple Airlines
Deal found 11/3C$ 289
Wed 27/54:35 p.m.
LAS
-
YYZ
1 stop9h 35m
WestJet
Tue 2/68:00 a.m.
YYZ
-
LAS
2 stops12h 15m
WestJet
Deal found 11/3C$ 292
Sat 18/411:05 p.m.
LAS
-
YYZ
Nonstop4h 15m
Porter Airlines
Mon 27/47:55 p.m.
YYZ
-
LAS
Nonstop5h 05m
Porter Airlines
Deal found 11/3C$ 294
Wed 15/47:40 p.m.
SFO
-
YYZ
2 stops20h 56m
Multiple Airlines
Mon 20/48:00 p.m.
YYZ
-
SFO
1 stop20h 52m
Multiple Airlines
Deal found 13/3C$ 390
Thu 9/47:00 a.m.
LAX
-
YYZ
2 stops13h 35m
WestJet
Wed 15/410:00 a.m.
YYZ
-
LAX
1 stop11h 30m
WestJet
Deal found 10/3C$ 392
Tue 14/47:40 p.m.
SFO
-
YYZ
2 stops20h 56m
Multiple Airlines
Tue 28/49:45 a.m.
YYZ
-
SFO
1 stop31h 07m
Multiple Airlines
Deal found 13/3C$ 394
Tue 7/41:39 p.m.
LAX
-
YYZ
2 stops26h 57m
Multiple Airlines
Fri 10/48:00 p.m.
YYZ
-
LAX
1 stop19h 58m
Multiple Airlines
Deal found 13/3C$ 394

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 15 March 2026.

Round-trip from

C$ 274

One-way from

C$ 108

Popular in

December

Cheapest in

June

Average price

C$ 567

Good round-trip deal

C$ 193 or less

Good one-way deal

C$ 231 or less
WestJet
  • WestJet
  • 15/4-27/4
  • 3 total stops
  • 21h 55m total
  • California to Ontario
Search Deals
WestJet
  • WestJet
  • 29/4
  • 2 total stops
  • 12h 25m total
  • California to Ontario
Search Deals
Highest demand for flights based on searches. 13% potential increase in price (C$ 97 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (C$ 21 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 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 15 March 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

Thu 30/4

4:28 p.m.-9:54 a.m.

1 stop14h 26m

Toronto Pearson Intl

Fri 1/5

12:45 p.m.-10:13 p.m.

1 stop12h 28m

C$ 350

Las VegasToronto

LAS - YYZ

LASYYZ

Las Vegas Harry Reid Intl

Mon 1/6

12:36 a.m.-11:49 a.m.

1 stop8h 13m

Toronto Pearson Intl

Tue 2/6

2:30 p.m.-10:19 p.m.

1 stop10h 49m

C$ 350

Las VegasToronto

LAS - YYZ

LASYYZ

Las Vegas Harry Reid Intl

Thu 9/4

10:43 a.m.-8:44 p.m.

1 stop7h 01m

Toronto Pearson Intl

Sun 12/4

2:45 p.m.-10:04 p.m.

1 stop10h 19m

C$ 399

Las VegasToronto

LAS - YYZ

LASYYZ

Las Vegas Harry Reid Intl

Thu 23/4

11:35 p.m.-11:43 a.m.

1 stop9h 08m

Toronto Pearson Intl

Wed 29/4

4:18 p.m.-8:57 p.m.

1 stop7h 39m

C$ 399

Las VegasToronto

LAS - YYZ

LASYYZ

Las Vegas Harry Reid Intl

Fri 5/6

11:30 p.m.-9:54 a.m.

1 stop7h 24m

Toronto Pearson Intl

Tue 9/6

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

1 stop7h 39m

C$ 417
Quickest round-trip

Las VegasToronto

LAS - YYZ

LASYYZ

Las Vegas Harry Reid Intl

Sun 12/4

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

Nonstop4h 18m

Toronto Pearson Intl

Sun 19/4

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

Nonstop5h 12m

C$ 420

Las VegasToronto

LAS - YYZ

LASYYZ

Las Vegas Harry Reid Intl

Mon 25/5

10:00 p.m.-11:43 a.m.

1 stop10h 43m

Toronto Pearson Intl

Sun 31/5

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

1 stop9h 38m

C$ 428

Las VegasToronto

LAS - YYZ

LASYYZ

Las Vegas Harry Reid Intl

Sat 28/3

6:30 a.m.-10:39 p.m.

1 stop13h 09m

Toronto Pearson Intl

Sat 4/4

6:10 a.m.-4:16 p.m.

1 stop13h 06m

C$ 442

San DiegoToronto

SAN - YYZ

SANYYZ

San Diego

Fri 1/5

5:17 p.m.-3:45 p.m.

2 stops19h 28m

Toronto Pearson Intl

Thu 7/5

4:55 p.m.-8:39 a.m.

2 stops18h 44m

C$ 525

San DiegoToronto

SAN - YYZ

SANYYZ

San Diego

Sat 25/4

7:35 p.m.-3:45 p.m.

1 stop17h 10m

Toronto Pearson Intl

Sun 3/5

4:55 p.m.-11:59 p.m.

1 stop10h 04m

C$ 579

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/3

Showing 1-10 of 60 resultsSorted by cheapest first
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2
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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

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$ 107). 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 15 March 2026.

Unlike in the morning, when flights are generally more expensive, you can save up to 28% 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 14 March 2026.

Travelers seeking maximum savings on their California to Region of Ontario flight should consider departing on Friday mornings when fares are most often at their lowest. Monday 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 15 March 2026.

The most flights from USCA to CAON are scheduled on a Monday (19 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (14 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 15 March 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
423 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
423 reviews
Porter Airlines
8.0
Very good
423 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
7.7
Good
521 reviews
Porter Airlines
8.0
Very good
423 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
9,428 reviews
Porter Airlines
8.0
Very good
423 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
3,295 reviews
Porter Airlines
8.0
Very good
423 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
10,801 reviews
Porter Airlines
8.0
Very good
423 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 8h 49m. United Airlines provides one of the quickest options available for as low as C$ 587. 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$ 81 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$ 107). 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

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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 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 15 March 2026.
AirlineCheapestAverageFlexibilityOn-time
Porter AirlinesCheapestC$ 145AverageC$ 480FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights
United AirlinesCheapestC$ 161AverageC$ 505FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Air CanadaCheapestC$ 168AverageC$ 612FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
Air TransatCheapestC$ 175AverageC$ 785FlexibilityNo cancel feeOn-time50%
Search Air Transat flights
American AirlinesCheapestC$ 181AverageC$ 850FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
WestJetCheapestC$ 209AverageC$ 344FlexibilityNo cancel feeOn-time60%
Search WestJet flights
DeltaCheapestC$ 222AverageC$ 321FlexibilityNo 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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