How long is the flight from California to Region of Ontario?

A quick flight from California to Region of Ontario can take about 4h 58m. United Airlines provides one of the quickest options available for as low as C$ 455. 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$ 95 is the cheapest one-way deal found within the past few days, from WestJet. You may also be able to find cheap deals on Delta and Porter Airlines, with prices starting from C$ 123 and C$ 132, respectively.

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.

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).

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.

C$ 193+ Cheap Flights from California to Ontario

Cheap flight deals from California to Ontario

Enter your travel dates to find the best prices.

Cheapest

Best

Direct

Last-minute

One-way

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 October 2026.

Thu 10/121:45 p.m. -

Nonstop4h 57m

Mon 14/129:50 a.m. -

Nonstop5h 57m

Deal found 23/10C$ 367

Sat 5/121:45 p.m. -

Nonstop4h 57m

Thu 10/129:50 a.m. -

Nonstop5h 57m

Deal found 23/10C$ 368

Mon 7/121:45 p.m. -

Nonstop4h 57m

Mon 14/129:50 a.m. -

Nonstop5h 57m

Deal found 23/10C$ 380

Sat 5/121:45 p.m. -

Nonstop4h 57m

Fri 11/129:50 a.m. -

Nonstop5h 57m

Deal found 23/10C$ 381

Sun 6/122:00 p.m. -

Nonstop4h 49m

Sun 13/129:50 a.m. -

Nonstop5h 57m

Deal found 22/10C$ 382

Thu 12/116:30 a.m. -

1 stop10h 27m

Wed 18/119:50 a.m. -

Nonstop5h 54m

Deal found 22/10C$ 384

Thu 12/114:40 p.m. -

Nonstop4h 49m

Wed 18/116:40 p.m. -

Nonstop5h 50m

Deal found 22/10C$ 386

Thu 3/128:25 a.m. -

Nonstop4h 49m

Sat 12/1210:20 a.m. -

Nonstop5h 50m

Deal found 21/10C$ 388

Thu 12/111:45 p.m. -

Nonstop4h 58m

Wed 18/119:50 a.m. -

Nonstop5h 54m

Deal found 22/10C$ 389

Thu 5/111:45 p.m. -

Nonstop4h 58m

Wed 11/119:50 a.m. -

Nonstop5h 54m

Deal found 21/10C$ 392

Wed 9/121:45 p.m. -

Nonstop4h 57m

Tue 12/111:30 a.m. -

1 stop8h 31m

Deal found 23/10C$ 394

Sat 14/111:45 p.m. -

Nonstop4h 58m

Wed 25/119:50 a.m. -

Nonstop5h 54m

Deal found 24/10C$ 395

Best flights from California to Ontario
Discover carefully curated flight deals from California to Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated 24 October 2026.

Fri 13/118:10 a.m. -

Nonstop4h 58m

Sun 15/116:30 a.m. -

Nonstop5h 59m

Deal found 22/10C$ 455

Tue 16/29:15 a.m. -

1 stop27h 50m

Thu 18/25:15 p.m. -

2 stops19h 35m

Deal found 21/10C$ 504

Fri 25/1212:00 p.m. -

1 stop8h 13m

Wed 6/16:30 a.m. -

1 stop9h 01m

Deal found 20/10C$ 535

Fri 4/128:32 a.m. -

1 stop27h 16m

Fri 11/125:40 p.m. -

2 stops17h 22m

Deal found 22/10C$ 703

Tue 26/112:30 p.m. -

2 stops14h 15m

Mon 1/22:10 p.m. -

2 stops24h 20m

Deal found 19/10C$ 732

Sat 5/121:45 p.m. -

1 stop7h 56m

Tue 8/127:00 a.m. -

1 stop8h 47m

Deal found 20/10C$ 769

Sun 8/111:45 p.m. -

1 stop7h 52m

Sun 15/117:00 a.m. -

1 stop8h 44m

Deal found 21/10C$ 832

Wed 17/212:15 a.m. -

1 stop10h 55m

Tue 23/26:30 a.m. -

Nonstop6h 09m

Deal found 21/10C$ 468

Fri 20/111:44 p.m. -

1 stop7h 15m

Wed 25/1111:45 a.m. -

1 stop15h 19m

Deal found 20/10C$ 961

Tue 15/1212:55 p.m. -

1 stop8h 00m

Tue 29/128:25 p.m. -

1 stop18h 35m

Deal found 21/10C$ 965

Thu 28/16:35 a.m. -

1 stop7h 12m

Sat 13/26:45 a.m. -

1 stop13h 41m

Deal found 23/10C$ 490

Tue 17/113:58 p.m. -

2 stops21h 07m

Sun 22/115:15 p.m. -

2 stops17h 18m

Deal found 22/10C$ 606

Wed 18/119:50 p.m. -

1 stop10h 19m

Mon 23/116:10 p.m. -

1 stop7h 24m

Deal found 22/10C$ 609

Fri 27/111:00 p.m. -

1 stop7h 57m

Fri 4/1212:20 p.m. -

1 stop9h 52m

Deal found 22/10C$ 619

Sun 15/118:03 a.m. -

1 stop29h 02m

Sat 21/115:15 p.m. -

1 stop8h 25m

Deal found 21/10C$ 651

Sat 21/119:25 a.m. -

2 stops19h 25m

Sat 28/119:00 p.m. -

1 stop17h 35m

Deal found 24/10C$ 720

Fri 16/48:30 a.m. -

1 stop8h 04m

Mon 19/411:00 a.m. -

1 stop8h 18m

Deal found 22/10C$ 622

Tue 8/121:49 p.m. -

1 stop6h 37m

Tue 15/126:20 a.m. -

1 stop9h 24m

Deal found 24/10C$ 637

Thu 19/1111:00 a.m. -

1 stop10h 25m

Thu 26/119:00 p.m. -

2 stops18h 55m

Deal found 20/10C$ 723

Thu 12/115:00 p.m. -

2 stops26h 40m

Thu 19/1110:20 p.m. -

2 stops17h 35m

Deal found 21/10C$ 802

Sun 14/310:45 p.m. -

1 stop8h 07m

Mon 22/33:00 p.m. -

1 stop9h 08m

Deal found 22/10C$ 622

Wed 4/111:45 p.m. -

1 stop7h 52m

Sun 15/117:00 a.m. -

1 stop8h 44m

Deal found 21/10C$ 832

Thu 19/1110:06 p.m. -

2 stops14h 59m

Sun 22/115:15 p.m. -

2 stops18h 37m

Deal found 22/10C$ 696

Tue 3/118:32 p.m. -

2 stops10h 51m

Tue 15/126:20 a.m. -

2 stops10h 42m

Deal found 24/10C$ 641

Sun 6/1210:44 p.m. -

2 stops12h 48m

Sun 13/1210:05 a.m. -

2 stops13h 03m

Deal found 22/10C$ 737

Sat 21/115:00 p.m. -

1 stop9h 00m

Thu 26/1110:20 p.m. -

1 stop16h 15m

Deal found 24/10C$ 816

Sun 20/1212:41 p.m. -

1 stop8h 18m

Tue 29/126:30 a.m. -

1 stop8h 19m

Deal found 21/10C$ 622

Fri 6/114:46 p.m. -

2 stops20h 19m

Mon 9/115:15 p.m. -

2 stops17h 12m

Deal found 20/10C$ 710

Thu 5/1112:57 p.m. -

1 stop8h 02m

Sun 8/116:30 a.m. -

1 stop9h 09m

Deal found 23/10C$ 650

Wed 30/127:40 a.m. -

Nonstop4h 46m

Wed 6/12:05 p.m. -

Nonstop5h 34m

Deal found 22/10C$ 738

Find flight deals from California to Ontario

Round-trip from	C$ 367
One-way from	C$ 193
Popular in	July
Cheapest in	January
Average price	C$ 710
Good round-trip deal	C$ 274 or less
Good one-way deal	C$ 263 or less

Porter Airlines
10/12-14/12
Nonstop
10h 54m total
California to Ontario

Search Deals

26/11-31/12
1 total stop
10h 36m total
California to Ontario

Search Deals

Highest demand for flights based on searches. 13% potential increase in price (C$ 144 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease (C$ 21 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in October 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

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

San FranciscoToronto

SFO San Francisco - YYZ Toronto Pearson Intl

SFOYYZ

San Francisco

Mon 7/12

7:51 p.m.-9:47 a.m.

2 stops10h 56m

Toronto Pearson Intl

Wed 31/12

12:00 a.m.-9:00 p.m.

Nonstop0h 00m

C$ 211

San FranciscoToronto

SFO San Francisco - YYZ Toronto Pearson Intl

SFOYYZ

San Francisco

Sun 15/11

6:47 p.m.-4:05 p.m.

2 stops18h 18m

Toronto Pearson Intl

Wed 31/12

12:00 a.m.-9:00 p.m.

Nonstop0h 00m

C$ 220

San FranciscoToronto

SFO San Francisco - YYZ Toronto Pearson Intl

SFOYYZ

San Francisco

Mon 15/2

6:00 a.m.-7:07 p.m.

1 stop10h 07m

Toronto Pearson Intl

Wed 31/12

12:00 a.m.-9:00 p.m.

Nonstop0h 00m

C$ 227

San FranciscoToronto

SFO San Francisco - YYZ Toronto Pearson Intl

SFOYYZ

San Francisco

Thu 12/11

10:50 p.m.-3:26 p.m.

1 stop13h 36m

Toronto Pearson Intl

Wed 31/12

12:00 a.m.-9:00 p.m.

Nonstop0h 00m

C$ 241

Santa AnaToronto

SNA Santa Ana J. Wayne/Orange Cnty - YYZ Toronto Pearson Intl

SNAYYZ

Santa Ana J. Wayne/Orange Cnty

Wed 6/1

7:30 a.m.-6:50 a.m.

1 stop20h 20m

Toronto Pearson Intl

Wed 31/12

12:00 a.m.-9:00 p.m.

Nonstop0h 00m

C$ 246

San FranciscoToronto

SFO San Francisco - YYZ Toronto Pearson Intl

SFOYYZ

San Francisco

Mon 4/1

4:35 p.m.-11:28 a.m.

2 stops15h 53m

Toronto Pearson Intl

Wed 31/12

12:00 a.m.-9:00 p.m.

Nonstop0h 00m

C$ 249

San JoseToronto

SJC San Jose - YYZ Toronto Pearson Intl

SJCYYZ

San Jose

Sat 5/12

6:30 a.m.-9:56 p.m.

1 stop12h 26m

Toronto Pearson Intl

Wed 31/12

12:00 a.m.-9:00 p.m.

Nonstop0h 00m

C$ 269

San JoseToronto

SJC San Jose - YYZ Toronto Pearson Intl

SJCYYZ

San Jose

Thu 12/11

2:14 p.m.-11:59 p.m.

1 stop6h 45m

Toronto Pearson Intl

Wed 31/12

12:00 a.m.-9:00 p.m.

Nonstop0h 00m

C$ 269

San JoseToronto

SJC San Jose - YYZ Toronto Pearson Intl

SJCYYZ

San Jose

Wed 11/11

6:30 a.m.-6:45 p.m.

1 stop9h 15m

Toronto Pearson Intl

Wed 31/12

12:00 a.m.-9:00 p.m.

Nonstop0h 00m

C$ 269

SacramentoToronto

SMF Sacramento Intl - YYZ Toronto Pearson Intl

SMFYYZ

Sacramento Intl

Fri 20/11

8:36 a.m.-6:51 a.m.

2 stops19h 15m

Toronto Pearson Intl

Wed 31/12

12:00 a.m.-9:00 p.m.

Nonstop0h 00m

C$ 276

Flights are sorted by cheapest round-trip flights first.

Deals found on 23/10

Showing 1-10 of 60 resultsSorted by cheapest first

...

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.

SFO-YYZ

SAN-YOW

SNA-YYZ

SFO-YOW

SMF-YYZ

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

USCA-CAON

SFO-YYZ

SAN-YOW

SNA-YYZ

SFO-YOW

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$ 555). Flying from California to Region of Ontario in December is currently the most expensive (average of C$ 815). 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?

Unlike in the evening, when flights are generally more expensive, you can save up to 18% on flights from California to Region of Ontario by exploring options for tickets at noon.

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$ 482 and C$ 972 in November.
The cheapest round-trip price found within the last 5 days was C$ 403 on Porter Airlines (18 Nov-25 Nov).

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 66 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?

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. Wednesday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

Reviews of airlines servicing Ontario

See what other customers who have flown with Porter Airlines,Delta, 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

467 reviews

Check prices

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

467 reviews

Porter Airlines

8.0

Very good

467 reviews

Check prices

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

Delta

7.8

Good

8,678 reviews

Porter Airlines

8.0

Very good

467 reviews

Check prices

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

7.3

Good

10,432 reviews

Porter Airlines

8.0

Very good

467 reviews

Check prices

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

3,445 reviews

Porter Airlines

8.0

Very good

467 reviews

Check prices

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

11,805 reviews

Porter Airlines

8.0

Very good

467 reviews

Check prices

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

How long is the flight from California to Region of Ontario?
A quick flight from California to Region of Ontario can take about 4h 58m. United Airlines provides one of the quickest options available for as low as C$ 455. 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$ 95 is the cheapest one-way deal found within the past few days, from WestJet. You may also be able to find cheap deals on Delta and Porter Airlines, with prices starting from C$ 123 and C$ 132, 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$ 555). Flying from California to Region of Ontario in December is currently the most expensive (average of C$ 815). 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

Alternative routes

Complete your trip

Direct flights to Canada

Flights by cabin class

Other flight options

Popular flights

Return Flight Options

Top destinations

Alternative routes for California to Ontario

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Top 6 airlines flying from California to Ontario

Airline	Cheapest	Average	Flexibility	On-time
American Airlines	CheapestC$ 264	AverageC$ 868	FlexibilityNo cancel fee	On-time71%	Search American Airlines flights
Air Canada	CheapestC$ 267	AverageC$ 791	FlexibilityNo cancel fee	On-time67%	Search Air Canada flights
Porter Airlines	CheapestC$ 292	AverageC$ 630	FlexibilityNo cancel fee	On-time52%	Search Porter Airlines flights
WestJet	CheapestC$ 304	AverageC$ 624	FlexibilityNo cancel fee	On-time60%	Search WestJet flights
Delta	CheapestC$ 334	AverageC$ 874	FlexibilityNo cancel fee	On-timeN/A	Search Delta flights
United Airlines	CheapestC$ 451	AverageC$ 1,066	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights

Fly with Cheapflights

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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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.

Cheap flights from California to Ontario from C$ 193

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 26/11. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from California to Ontario

Cheapest flights from California to OntarioExplore 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 October 2026.

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 October 2026.

Best flights from California to OntarioDiscover carefully curated flight deals from California to Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated 24 October 2026.

Discover carefully curated flight deals from California to Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated 24 October 2026.

Direct flights from California to OntarioExplore direct flight options from California to Ontario based on user searches, and compare prices and availability for your desired travel dates. Data last updated 24 October 2026.

Explore direct flight options from California to Ontario based on user searches, and compare prices and availability for your desired travel dates. Data last updated 24 October 2026.

Last-minute flights from California to OntarioDiscover last-minute flight deals from California to Ontario. Data last updated 24 October 2026 and is based on user searches.

Discover last-minute flight deals from California to Ontario. Data last updated 24 October 2026 and is based on user searches.

One-way flights from California to OntarioSearch for one-way flight options from California to Ontario. Find affordable one-way fares based on user searches. Data last updated 24 October 2026.

Search for one-way flight options from California to Ontario. Find affordable one-way fares based on user searches. Data last updated 24 October 2026.

Find flight deals from California to Ontario

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Good round-trip deal

Good one-way deal

Cheapflights Fare Finder

Use the filters below to find and compare flights from California to Ontario that are best for you.

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.

Cheapflights Insights

What is the cheapest month to book a flight from California to Region of Ontario?

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 October 2026.

Unlike in the evening, when flights are generally more expensive, you can save up to 18% on flights from California to Region of Ontario by exploring options for tickets at noon.

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$ 482 and C$ 972 in November.The cheapest round-trip price found within the last 5 days was C$ 403 on Porter Airlines (18 Nov-25 Nov).

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 66 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 24 October 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. Wednesday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

Reviews of airlines servicing Ontario

See what other customers who have flown with Porter Airlines,Delta, 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.

Related info for your journey

How long is the flight from California to Region of Ontario?

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

Can I find deals for flights from California to Ontario that include hotel bookings?

How can I find direct flights from California to Ontario?

Can I find deals for business class flights from California to Ontario?

What is the cheapest month to book a flight from California to Region of Ontario?

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.

Complete your trip

Complete your trip to Ontario by adding a car rental and/or hotel reservation to your travel itinerary.

Direct flights to Canada

Book a non-stop flight to one of these other cities located in Canada.

Search flights from California to Ontario by cabin class

Find flights from California to Ontario, based on your preferred cabin class, be it economy, premium economy, business, or first class.

California and Ontario flights

Browse other California and Ontario flight options. Last updated on 24 October 2026.

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California to Ontario flights

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Top 6 airlines flying from California to Ontario

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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 October 2026.

Best flights from California to Ontario
Discover carefully curated flight deals from California to Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated 24 October 2026.

Direct flights from California to Ontario
Explore direct flight options from California to Ontario based on user searches, and compare prices and availability for your desired travel dates. Data last updated 24 October 2026.

Last-minute flights from California to Ontario
Discover last-minute flight deals from California to Ontario. Data last updated 24 October 2026 and is based on user searches.

One-way flights from California to Ontario
Search for one-way flight options from California to Ontario. Find affordable one-way fares based on user searches. Data last updated 24 October 2026.

California to Region of Ontario flights typically cost between C$ 482 and C$ 972 in November.
The cheapest round-trip price found within the last 5 days was C$ 403 on Porter Airlines (18 Nov-25 Nov).