Find flights
Deals
When to book
Airlines
FAQs

Cheap flights from California to Ontario from C$ 77

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 7/5. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — YYZ
31 Mar — 7 Apr1
1 adult

Cheap flight deals from California to Ontario

Keep the following information in mind while searching for California to Ontario flight deals. Data was last updated 26 March 2025.

Round-trip from

C$ 186

One-way from

C$ 77

Popular in

December

Cheapest in

September

Average price

C$ 493

Good round-trip deal

C$ 191 or less

Good one-way deal

C$ 167 or less
Porter Airlines
  • Porter Airlines
  • 9/4-14/4
  • 1 total stop
  • 13h 58m total
  • California to Ontario
Search Deals
WestJet
  • WestJet
  • 7/5
  • 2 total stops
  • 13h 47m total
  • California to Ontario
Search Deals
Highest demand for flights based on searches. 6% potential increase in price (C$ 51 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (C$ 18 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2025
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

Find flight deals from California to Ontario

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 26 March 2025.

Thu 3/411:25 p.m.LAS - YYZ
Nonstop4h 18mMultiple Airlines
Wed 9/42:00 p.m.YYZ - LAS
1 stop9h 40mMultiple Airlines
Deal found 25/3C$ 180
Tue 1/41:20 p.m.LAS - YYZ
1 stop8h 06mWestJet
Mon 7/48:00 p.m.YYZ - LAS
Nonstop5h 13mWestJet
Deal found 25/3C$ 187
Thu 3/41:00 p.m.LAS - YYZ
1 stop6h 48mAir Canada
Wed 9/47:30 a.m.YYZ - LAS
1 stop11h 20mAir Canada
Deal found 25/3C$ 199
Thu 10/410:35 p.m.LAS - YYZ
Nonstop4h 20mAir Transat
Mon 14/47:25 p.m.YYZ - LAS
Nonstop5h 03mAir Transat
Deal found 25/3C$ 220
Mon 31/311:55 p.m.LAS - YYZ
1 stop7h 09mUnited Airlines
Tue 1/42:00 p.m.YYZ - LAS
1 stop7h 33mUnited Airlines
Deal found 25/3C$ 223
Thu 21/811:10 p.m.LAX - YYZ
Nonstop4h 51mWestJet
Sun 24/87:45 p.m.YYZ - LAX
Nonstop5h 25mWestJet
Deal found 25/3C$ 245
Wed 16/46:15 a.m.SAN - YYZ
1 stop21h 28mMultiple Airlines
Sun 20/46:30 a.m.YYZ - SAN
2 stops28h 04mMultiple Airlines
Deal found 25/3C$ 263
Thu 29/54:45 p.m.LAS - YYZ
Nonstop4h 27mPorter Airlines
Mon 2/68:05 p.m.YYZ - LAS
Nonstop4h 53mPorter Airlines
Deal found 25/3C$ 267
Sat 17/511:10 p.m.LAX - YYZ
Nonstop4h 50mMultiple Airlines
Thu 22/512:45 p.m.YYZ - LAX
Nonstop5h 20mMultiple Airlines
Deal found 25/3C$ 267
Tue 6/51:10 p.m.LAX - YYZ
Nonstop4h 53mPorter Airlines
Sun 11/59:45 a.m.YYZ - LAX
Nonstop5h 25mPorter Airlines
Deal found 26/3C$ 318
Wed 14/511:40 a.m.LAX - YUL
1 stop10h 03mMultiple Airlines
Wed 4/66:45 a.m.YUL - LAX
1 stop8h 25mMultiple Airlines
Deal found 25/3C$ 325
Tue 1/42:43 p.m.ONT - YYZ
2 stops12h 34mMultiple Airlines
Mon 7/48:00 p.m.YYZ - ONT
1 stop22h 04mMultiple Airlines
Deal found 25/3C$ 329

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 26 March 2025.
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

Wed 9/4

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

Nonstop4h 18m

Toronto Pearson Intl

Mon 14/4

2:00 p.m.-8:40 p.m.

1 stop9h 40m

C$ 186

Las VegasToronto

LAS - YYZ

LASYYZ

Las Vegas Harry Reid Intl

Thu 10/4

10:50 a.m.-11:11 p.m.

1 stop9h 21m

Toronto Pearson Intl

Mon 14/4

6:30 a.m.-12:32 p.m.

1 stop9h 02m

C$ 189

Las VegasToronto

LAS - YYZ

LASYYZ

Las Vegas Harry Reid Intl

Thu 10/4

10:35 p.m.-5:55 a.m.

Nonstop4h 20m

Toronto Pearson Intl

Mon 14/4

7:25 p.m.-9:28 p.m.

Nonstop5h 03m

C$ 220

Las VegasToronto

LAS - YYZ

LASYYZ

Las Vegas Harry Reid Intl

Thu 10/4

11:15 p.m.-6:29 a.m.

Nonstop4h 14m

Toronto Pearson Intl

Tue 15/4

8:15 a.m.-10:12 a.m.

Nonstop4h 57m

C$ 237

Los AngelesToronto

LAX - YYZ

LAXYYZ

Los Angeles

Thu 21/8

11:10 p.m.-7:01 a.m.

Nonstop4h 51m

Toronto Pearson Intl

Sun 24/8

7:45 p.m.-10:10 p.m.

Nonstop5h 25m

C$ 245

Las VegasToronto

LAS - YYZ

LASYYZ

Las Vegas Harry Reid Intl

Fri 16/5

11:10 p.m.-6:35 a.m.

Nonstop4h 25m

Toronto Pearson Intl

Mon 19/5

8:05 p.m.-9:58 p.m.

Nonstop4h 53m

C$ 256

Los AngelesToronto

LAX - YYZ

LAXYYZ

Los Angeles

Tue 10/6

11:10 p.m.-7:00 a.m.

Nonstop4h 50m

Toronto Pearson Intl

Thu 19/6

9:45 a.m.-12:10 p.m.

Nonstop5h 25m

C$ 257

San DiegoToronto

SAN - YYZ

SANYYZ

San Diego

Wed 16/4

6:15 a.m.-6:43 a.m.

1 stop21h 28m

Toronto Pearson Intl

Sun 20/4

6:30 a.m.-7:34 a.m.

2 stops28h 04m

C$ 263

Las VegasToronto

LAS - YYZ

LASYYZ

Las Vegas Harry Reid Intl

Tue 8/4

12:59 a.m.-11:30 a.m.

1 stop7h 31m

Toronto Pearson Intl

Sun 13/4

7:00 a.m.-11:33 a.m.

1 stop7h 33m

C$ 273

Los AngelesToronto

LAX - YYZ

LAXYYZ

Los Angeles

Tue 6/5

1:10 p.m.-9:03 p.m.

Nonstop4h 53m

Toronto Pearson Intl

Sun 11/5

9:45 a.m.-12:10 p.m.

Nonstop5h 25m

C$ 318

Flights are sorted by cheapest round-trip flights first.

Deals found on 25/3

Showing 1-10 of 60 results
1
2
3
...
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, January is the cheapest month in which you can book a flight from California to Region of Ontario (average of C$ 167). Flying from California to Region of Ontario in July 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 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 26 March 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from California to Region of Ontario as you normally would.

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 26 March 2025.

The most flights from USCA to CAON are scheduled on a Monday (16 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (4 on average).

Rainfall in Ontario by month

Plan your trip to Ontario by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Region of Ontario ranges from 51.0 - 83.0 mm per month. June is typically the wettest month, when rainfall can reach 83.0 mm. February is typically the driest time to visit Region of Ontario when rainfall is around 51.0 mm.

Temperature in Ontario by month

Plan your trip to Ontario by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Region of Ontario, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 21.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around -6.0 C).

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 26 March 2025.
Read reviews from past customers who have flown Alaska Airlines, Delta and Porter Airlines from California to Ontario. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
9,789 reviews
Check prices

Crew

8.5

Entertainment

7.1

Food

7.1

Boarding

8.2

Overall

8.0

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Alaska Airlines
8.0
Very good
9,789 reviews
Alaska Airlines
8.0
Very good
9,789 reviews
Check prices

Crew

8.5

Entertainment

7.1

Food

7.1

Boarding

8.2

Overall

8.0

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Delta
8.0
Very good
7,891 reviews
Alaska Airlines
8.0
Very good
9,789 reviews
Check prices

Crew

8.5

Entertainment

7.1

Food

7.1

Boarding

8.2

Overall

8.0

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Porter Airlines
7.9
Good
276 reviews
Alaska Airlines
8.0
Very good
9,789 reviews
Check prices

Crew

8.5

Entertainment

7.1

Food

7.1

Boarding

8.2

Overall

8.0

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Hawaiian Airlines
7.9
Good
2,330 reviews
Alaska Airlines
8.0
Very good
9,789 reviews
Check prices

Crew

8.5

Entertainment

7.1

Food

7.1

Boarding

8.2

Overall

8.0

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Air Transat
7.8
Good
381 reviews
Alaska Airlines
8.0
Very good
9,789 reviews
Check prices

Crew

8.5

Entertainment

7.1

Food

7.1

Boarding

8.2

Overall

8.0

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

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.

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

    C$ 77 is the cheapest one-way deal found within the past few days, from WestJet. You may also be able to find cheap deals on Air Canada and Porter Airlines, with prices starting from C$ 84 and C$ 104, 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, January is the cheapest month in which you can book a flight from California to Region of Ontario (average of C$ 167). Flying from California to Region of Ontario in July 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

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.
Newark to Toronto Island flights
Newark to Pearson Intl flights
John F Kennedy Intl to Vancouver Intl flights
Newark to Vancouver Intl flights
John F Kennedy Intl to Pierre Elliott Trudeau Intl flights
Los Angeles to Vancouver Intl flights
Newark to Pierre Elliott Trudeau Intl flights
John F Kennedy Intl to Pearson Intl flights
LaGuardia to Pearson Intl flights
San Francisco to Vancouver Intl flights
LaGuardia to Pierre Elliott Trudeau Intl flights
Newark to Calgary flights
Boston to Pearson Intl flights
O'Hare Intl to Vancouver Intl flights
John F Kennedy Intl to Calgary flights
O'Hare Intl to Pearson Intl flights
Boston to Toronto Island flights
San Francisco to Pearson Intl flights
Dallas/Fort Worth to Pearson Intl flights
Los Angeles to Pearson Intl flights
Dulles Intl to Vancouver Intl flights
O'Hare Intl to Calgary flights
LaGuardia to Vancouver Intl flights
Reagan-National to Pearson Intl flights
Dulles Intl to Pearson Intl flights
Dulles Intl to Pierre Elliott Trudeau Intl flights
Los Angeles to Calgary flights
O'Hare Intl to Pierre Elliott Trudeau Intl flights
San Diego to Vancouver Intl flights
Denver to Vancouver Intl flights
Boston to Vancouver Intl flights
Hobby to Pearson Intl flights
San Francisco to Pierre Elliott Trudeau Intl flights
Boston to Pierre Elliott Trudeau Intl flights
Detroit to Vancouver Intl flights
Reagan-National to Pierre Elliott Trudeau Intl flights
Seattle to Pearson Intl flights
Los Angeles to Pierre Elliott Trudeau Intl flights
Hobby to Vancouver Intl flights
Dallas/Fort Worth to Vancouver Intl flights
Atlanta to Vancouver Intl flights
Dulles Intl to Toronto Island flights
LaGuardia to Calgary flights
George Bush Intcntl to Pearson Intl flights
San Francisco to Calgary flights
Santa Ana to Vancouver Intl flights
Atlanta to Pearson Intl flights
Dallas/Fort Worth to Pierre Elliott Trudeau Intl flights
Dulles Intl to Calgary flights
Ontario to Vancouver Intl flights

Top 5 airlines flying from California to Ontario

Discover the top 5 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 26 March 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapestC$ 168AverageC$ 663FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Air CanadaCheapestC$ 180AverageC$ 731FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
Porter AirlinesCheapestC$ 219AverageC$ 571FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights
Air TransatCheapestC$ 248AverageC$ 573FlexibilityNo cancel feeOn-time50%
Search Air Transat flights
WestJetCheapestC$ 255AverageC$ 500FlexibilityNo cancel feeOn-time60%
Search WestJet 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.

100% Free
Cheapflights is completely free to use, so you can start saving the moment you arrive.
Book with Flexibility
Our users can plan ahead with confidence and find flights with no change fees
Travel Smart
Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.