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Cheap flights from California to Ontario from C$ 214

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 23/9. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — YYZ
23 Aug — 30 Aug1
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 24 July 2026.

Fri 4/911:20 p.m.
LAS
-
YYZ
Nonstop4h 19m
Porter Airlines
Fri 11/97:00 a.m.
YYZ
-
LAS
Nonstop4h 47m
Porter Airlines
Deal found 20/7C$ 386
Thu 8/108:30 a.m.
LAS
-
YYZ
2 stops10h 05m
WestJet
Mon 12/108:00 a.m.
YYZ
-
LAS
2 stops12h 15m
WestJet
Deal found 23/7C$ 389
Fri 11/129:40 a.m.
LAS
-
YYZ
1 stop8h 00m
Multiple Airlines
Sun 13/121:30 p.m.
YYZ
-
LAS
1 stop10h 03m
Multiple Airlines
Deal found 20/7C$ 394
Fri 4/911:25 p.m.
LAS
-
YYZ
Nonstop4h 16m
Air Canada
Thu 10/98:35 p.m.
YYZ
-
LAS
Nonstop4h 47m
Air Canada
Deal found 21/7C$ 404
Fri 4/911:25 p.m.
LAS
-
YYZ
Nonstop4h 16m
Multiple Airlines
Fri 11/97:00 a.m.
YYZ
-
LAS
Nonstop4h 47m
Multiple Airlines
Deal found 21/7C$ 406
Thu 15/1011:20 p.m.
LAS
-
YYZ
Nonstop4h 19m
Multiple Airlines
Mon 19/108:00 a.m.
YYZ
-
LAS
2 stops12h 15m
Multiple Airlines
Deal found 23/7C$ 407
Fri 16/106:00 a.m.
SFO
-
YYZ
2 stops12h 35m
Multiple Airlines
Tue 20/109:45 a.m.
YYZ
-
SFO
Nonstop5h 35m
Multiple Airlines
Deal found 20/7C$ 408
Mon 14/99:45 a.m.
LAS
-
YYZ
Nonstop4h 24m
Multiple Airlines
Fri 18/98:00 a.m.
YYZ
-
LAS
2 stops12h 15m
Multiple Airlines
Deal found 22/7C$ 411
Thu 15/106:00 a.m.
SFO
-
YYZ
2 stops12h 35m
Multiple Airlines
Tue 20/109:45 a.m.
YYZ
-
SFO
Nonstop5h 35m
Multiple Airlines
Deal found 20/7C$ 413
Thu 17/98:30 a.m.
LAS
-
YYZ
2 stops10h 05m
WestJet
Sun 20/912:40 p.m.
YYZ
-
LAS
2 stops12h 00m
WestJet
Deal found 23/7C$ 414
Fri 16/106:00 a.m.
SFO
-
YYZ
2 stops12h 35m
WestJet
Tue 20/106:00 a.m.
YYZ
-
SFO
1 stop9h 00m
WestJet
Deal found 20/7C$ 416
Thu 15/106:00 a.m.
SFO
-
YYZ
2 stops12h 35m
WestJet
Mon 19/103:50 p.m.
YYZ
-
SFO
1 stop9h 05m
WestJet
Deal found 20/7C$ 417

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 24 July 2026.

Round-trip from

C$ 386

One-way from

C$ 214

Popular in

July

Cheapest in

October

Average price

C$ 810

Good round-trip deal

C$ 303 or less

Good one-way deal

C$ 314 or less
Porter Airlines
  • Porter Airlines
  • 4/9-11/9
  • Nonstop
  • 9h 06m total
  • California to Ontario
Search Deals
WestJet
  • WestJet
  • 23/9
  • 2 total stops
  • 12h 50m total
  • California to Ontario
Search Deals
Highest demand for flights based on searches. 16% potential increase in price (C$ 163 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (C$ 28 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 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 24 July 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 12/11

8:00 a.m.-10:43 p.m.

2 stops11h 43m

Toronto Pearson Intl

Mon 16/11

11:30 a.m.-1:37 p.m.

Nonstop5h 07m

C$ 416

Las VegasToronto

LAS - YYZ

LASYYZ

Las Vegas Harry Reid Intl

Fri 25/9

10:40 p.m.-1:47 p.m.

1 stop12h 07m

Toronto Pearson Intl

Sat 26/9

5:30 p.m.-10:23 p.m.

1 stop7h 53m

C$ 463

Las VegasToronto

LAS - YYZ

LASYYZ

Las Vegas Harry Reid Intl

Mon 12/10

11:50 p.m.-3:46 p.m.

1 stop12h 56m

Toronto Pearson Intl

Wed 28/10

8:40 p.m.-10:47 p.m.

Nonstop5h 07m

C$ 483

Las VegasToronto

LAS - YYZ

LASYYZ

Las Vegas Harry Reid Intl

Fri 20/11

5:45 a.m.-4:08 p.m.

1 stop7h 23m

Toronto Pearson Intl

Mon 23/11

10:53 a.m.-10:17 p.m.

1 stop14h 24m

C$ 486

Las VegasToronto

LAS - YYZ

LASYYZ

Las Vegas Harry Reid Intl

Mon 5/10

11:59 p.m.-1:47 p.m.

1 stop10h 48m

Toronto Pearson Intl

Sun 11/10

4:18 p.m.-9:59 p.m.

1 stop8h 41m

C$ 507

Las VegasToronto

LAS - YYZ

LASYYZ

Las Vegas Harry Reid Intl

Mon 12/10

11:59 p.m.-11:43 a.m.

1 stop8h 44m

Toronto Pearson Intl

Mon 19/10

5:27 p.m.-10:13 p.m.

1 stop7h 46m

C$ 523

Las VegasToronto

LAS - YYZ

LASYYZ

Las Vegas Harry Reid Intl

Mon 14/9

7:20 p.m.-5:18 p.m.

2 stops18h 58m

Toronto Pearson Intl

Sun 20/9

7:45 a.m.-11:48 p.m.

2 stops19h 03m

C$ 524

Las VegasToronto

LAS - YYZ

LASYYZ

Las Vegas Harry Reid Intl

Mon 5/10

11:24 p.m.-8:50 a.m.

1 stop6h 26m

Toronto Pearson Intl

Fri 9/10

9:40 a.m.-6:07 p.m.

1 stop11h 27m

C$ 597

Los AngelesToronto

LAX - YTZ

LAXYTZ

Los Angeles Los Angeles

Fri 11/9

8:15 a.m.-7:50 p.m.

1 stop8h 35m

Toronto Island

Mon 14/9

12:30 p.m.-7:54 p.m.

1 stop10h 24m

C$ 606

Los AngelesToronto

LAX - YYZ

LAXYYZ

Los Angeles Los Angeles

Sun 6/9

7:23 p.m.-2:24 p.m.

1 stop16h 01m

Toronto Pearson Intl

Thu 10/9

5:16 p.m.-7:46 p.m.

Nonstop5h 30m

C$ 607

Flights are sorted by cheapest round-trip flights first.

Deals found on 20/7

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, February is the cheapest month in which you can book a flight from California to Region of Ontario (average of C$ 556). Flying from California to Region of Ontario in December is currently the most expensive (average of C$ 820). 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 24 July 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.

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 24 July 2026.

The most flights from USCA to CAON are scheduled on a Monday (20 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (15 on average).

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

Airfare is below average for this route at the moment.
California to Region of Ontario flights typically cost between C$ 503 and C$ 901 in October.
The cheapest round-trip price found within the last 5 days was C$ 456 on WestJet (23 Oct-30 Oct).

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 30 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 18 July 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 24 July 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
448 reviews
Check prices

Entertainment

6.9

Overall

8.0

Food

7.5

Comfort

8.0

Boarding

8.2

Crew

8.6

Reviews

1 / 20
6.0
Good

Shannon,Jul 2026

YQT - YOW

Seats need to be a bit bigger & I'm not impressed that you have to pay to change seats
Porter Airlines
8.0
Very good
448 reviews
Porter Airlines
8.0
Very good
448 reviews
Check prices

Entertainment

6.9

Overall

8.0

Food

7.5

Comfort

8.0

Boarding

8.2

Crew

8.6

Reviews

1 / 20
6.0
Good

Shannon,Jul 2026

YQT - YOW

Seats need to be a bit bigger & I'm not impressed that you have to pay to change seats
Air Transat
7.8
Good
566 reviews
Porter Airlines
8.0
Very good
448 reviews
Check prices

Entertainment

6.9

Overall

8.0

Food

7.5

Comfort

8.0

Boarding

8.2

Crew

8.6

Reviews

1 / 20
6.0
Good

Shannon,Jul 2026

YQT - YOW

Seats need to be a bit bigger & I'm not impressed that you have to pay to change seats
United Airlines
7.4
Good
10,029 reviews
Porter Airlines
8.0
Very good
448 reviews
Check prices

Entertainment

6.9

Overall

8.0

Food

7.5

Comfort

8.0

Boarding

8.2

Crew

8.6

Reviews

1 / 20
6.0
Good

Shannon,Jul 2026

YQT - YOW

Seats need to be a bit bigger & I'm not impressed that you have to pay to change seats
WestJet
7.2
Good
3,416 reviews
Porter Airlines
8.0
Very good
448 reviews
Check prices

Entertainment

6.9

Overall

8.0

Food

7.5

Comfort

8.0

Boarding

8.2

Crew

8.6

Reviews

1 / 20
6.0
Good

Shannon,Jul 2026

YQT - YOW

Seats need to be a bit bigger & I'm not impressed that you have to pay to change seats
Air Canada
7.1
Good
11,383 reviews
Porter Airlines
8.0
Very good
448 reviews
Check prices

Entertainment

6.9

Overall

8.0

Food

7.5

Comfort

8.0

Boarding

8.2

Crew

8.6

Reviews

1 / 20
6.0
Good

Shannon,Jul 2026

YQT - YOW

Seats need to be a bit bigger & I'm not impressed that you have to pay to change seats

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 05m. United Airlines provides one of the quickest options available for as low as C$ 644. 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$ 75 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$ 124, 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, February is the cheapest month in which you can book a flight from California to Region of Ontario (average of C$ 556). Flying from California to Region of Ontario in December is currently the most expensive (average of C$ 820). 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 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 24 July 2026.
AirlineCheapestAverageFlexibilityOn-time
WestJetCheapestC$ 163AverageC$ 509FlexibilityNo cancel feeOn-time60%
Search WestJet flights
Porter AirlinesCheapestC$ 200AverageC$ 588FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights
Air CanadaCheapestC$ 267AverageC$ 781FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
Air TransatCheapestC$ 307AverageC$ 796FlexibilityNo cancel feeOn-time50%
Search Air Transat flights
DeltaCheapestC$ 336AverageC$ 879FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
United AirlinesCheapestC$ 453AverageC$ 1,062FlexibilityNo 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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