What is the cheapest airline that flies from California to Ontario?

United Airlines, Delta, and American Airlines are the most popular carriers operating from California to Ontario

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

The flight from California to Region of Ontario depends on which airports you’re departing from and arriving to, and whether or not you have a layover. If you fly from Los Angeles (a popular airport in California) to Toronto Pearson Intl Airport (the most popular airport in Region of Ontario), then the flight time is 4h 43m on average. If you fly from San Diego (another popular airport in California) to Toronto Pearson Intl Airport, then the average flight time is 4h 49m.

How many flights depart from California to Region of Ontario on average per day?

The number of flights available between California and Region of Ontario is 42 per day as of October 2026. The most frequent departure time is 1:00p.m., with 47% of daily flights leaving in the afternoon.

Which airlines fly to Region of Ontario?

Air Canada, Porter Airlines and United Airlines are the top three most popular airlines that fly to Region of Ontario from California according to our data. Air Canada is the first choice among our users, with 52% of people opting to fly with this airline when travelling to Region of Ontario. Keep in mind that there are 6 different airlines that fly to Region of Ontario on a routine basis, so you have a few additional options to choose from.

How many flights depart from California to Region of Ontario on average per week?

The number of flights available between California and Region of Ontario is 295 per week as of October 2026. The most frequent departure day is Fri, with 17% of weekly flights leaving on this day.

When did momondo last update prices for flights from California to Ontario?

Prices for flights from California to Ontario refresh daily.

How many operators does momondo search for flights from California to Ontario?

The number of operators available for flights from California to Ontario is 6 as of October 2026.

How old do you have to be to fly from California to Ontario?

Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from California to Ontario.

What documentation or ID do you need to fly to Ontario?

The travel and health documents you'll need for your trip to Ontario may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Ontario. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

C$ 209 Cheap Flights from California to Ontario in 2026/27

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from California to Ontario

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

Enter your travel dates to find the best prices.

11:09 a.m. - 9:50 p.m.LAX Los Angeles-YYZ Toronto Pearson Intl

7h 41m1 stop Las Vegas Harry Reid Intl

8:30 p.m. - 7:39 a.m.YYZ Toronto Pearson Intl-LAX Los Angeles

14h 09m1 stop Las Vegas Harry Reid Intl

C$ 417Multiple Airlines

Tue, 2 Feb - Mon, 22 Feb

10:35 a.m. - 9:52 p.m.SFO San Francisco-YYZ Toronto Pearson Intl

8h 17m1 stop Las Vegas Harry Reid Intl

8:30 p.m. - 9:34 a.m.YYZ Toronto Pearson Intl-SFO San Francisco

16h 04m1 stop Las Vegas Harry Reid Intl

C$ 430Multiple Airlines

Wed, 2 Dec - Mon, 7 Dec

1:45 p.m. - 9:43 p.m.SFO San Francisco-YYZ Toronto Pearson Intl

4h 58mdirect

9:50 a.m. - 12:44 p.m.YYZ Toronto Pearson Intl-SFO San Francisco

5h 54mdirect

C$ 441Porter Airlines

Wed, 11 Nov - Sat, 21 Nov

1:45 p.m. - 9:42 p.m.SFO San Francisco-YYZ Toronto Pearson Intl

4h 57mdirect

9:50 a.m. - 12:47 p.m.YYZ Toronto Pearson Intl-SFO San Francisco

5h 57mdirect

C$ 441Porter Airlines

Fri, 4 Dec - Mon, 14 Dec

8:30 a.m. - 8:50 p.m.LAX Los Angeles-YYZ Toronto Pearson Intl

9h 20m1 stop Montreal Pierre Elliott Trudeau Intl

8:00 a.m. - 10:34 a.m.YYZ Toronto Pearson Intl-LAX Los Angeles

5h 34mdirect

C$ 445Air Canada

Thu, 29 Oct - Tue, 3 Nov

5:00 p.m. - 5:00 a.m.LAX Los Angeles-YYZ Toronto Pearson Intl

9h 00m1 stop Calgary

7:30 a.m. - 4:10 p.m.YYZ Toronto Pearson Intl-LAX Los Angeles

11h 40m1 stop Calgary

C$ 510WestJet

Thu, 26 Nov - Tue, 1 Dec

6:30 a.m. - 7:57 p.m.SFO San Francisco-YYZ Toronto Pearson Intl

10h 27m1 stop Vancouver Intl

1:00 p.m. - 9:33 p.m.YYZ Toronto Pearson Intl-SFO San Francisco

11h 33m1 stop Montreal Pierre Elliott Trudeau Intl

C$ 513Air Canada

Fri, 13 Nov - Thu, 19 Nov

12:10 p.m. - 5:45 a.m.LAX Los Angeles-YYZ Toronto Pearson Intl

14h 35m2 stops Calgary Edmonton

7:30 a.m. - 4:10 p.m.YYZ Toronto Pearson Intl-LAX Los Angeles

11h 40m1 stop Calgary

C$ 513WestJet

Thu, 26 Nov - Tue, 1 Dec

5:00 a.m. - 3:02 p.m.SFO San Francisco-YYZ Toronto Pearson Intl

7h 02m1 stop Denver Intl

5:10 p.m. - 8:03 p.m.YYZ Toronto Pearson Intl-SFO San Francisco

5h 53mdirect

C$ 567United Airlines

Thu, 10 Dec - Thu, 10 Dec

10:45 p.m. - 6:45 a.m.SFO San Francisco-YYZ Toronto Pearson Intl

5h 00mdirect

6:30 a.m. - 9:09 a.m.YYZ Toronto Pearson Intl-SFO San Francisco

5h 39mdirect

C$ 571United Airlines

Sat, 3 Apr - Fri, 9 Apr

Cheap last-minute flights

Enter your travel dates to find the best prices.

2:15 p.m. - 9:59 p.m.LAX Los Angeles-YYZ Toronto Pearson Intl

4h 44mdirect

9:55 a.m. - 12:34 p.m.YYZ Toronto Pearson Intl-LAX Los Angeles

5h 39mdirect

C$ 506Porter Airlines

Sat, 24 Oct - Sun, 25 Oct

2:15 p.m. - 9:59 p.m.LAX Los Angeles-YYZ Toronto Pearson Intl

4h 44mdirect

9:55 a.m. - 12:34 p.m.YYZ Toronto Pearson Intl-LAX Los Angeles

5h 39mdirect

C$ 506Porter Airlines

Fri, 23 Oct - Sun, 25 Oct

8:15 a.m. - 9:53 p.m.LAX Los Angeles-YYZ Toronto Pearson Intl

10h 38m1 stop Montreal Pierre Elliott Trudeau Intl

1:00 p.m. - 3:34 p.m.YYZ Toronto Pearson Intl-LAX Los Angeles

5h 34mdirect

C$ 548Air Canada

Fri, 23 Oct - Mon, 26 Oct

12:25 p.m. - 11:18 p.m.LAX Los Angeles-YYZ Toronto Pearson Intl

7h 53m1 stop Montreal Pierre Elliott Trudeau Intl

8:00 a.m. - 10:34 a.m.YYZ Toronto Pearson Intl-LAX Los Angeles

5h 34mdirect

C$ 554Air Canada

Sat, 24 Oct - Mon, 26 Oct

5:42 p.m. - 8:49 a.m.SJC San Jose-YYZ Toronto Pearson Intl

12h 07m2 stops Seattle/Tacoma Intl Detroit Metropolitan Wayne County

12:10 p.m. - 10:08 p.m.YYZ Toronto Pearson Intl-SJC San Jose

12h 58m2 stops Detroit Metropolitan Wayne County Los Angeles

C$ 618Delta

Sat, 24 Oct - Fri, 30 Oct

6:11 p.m. - 8:49 a.m.SJC San Jose-YYZ Toronto Pearson Intl

11h 38m2 stops Los Angeles Detroit Metropolitan Wayne County

12:10 p.m. - 9:25 p.m.YYZ Toronto Pearson Intl-SJC San Jose

12h 15m2 stops Detroit Metropolitan Wayne County Atlanta Hartsfield-Jackson

C$ 618Delta

Sat, 24 Oct - Fri, 30 Oct

6:00 a.m. - 10:47 p.m.SJC San Jose-YYZ Toronto Pearson Intl

13h 47m2 stops Phoenix Sky Harbor Intl Dallas/Fort Worth

6:45 a.m. - 12:02 p.m.YYZ Toronto Pearson Intl-SJC San Jose

8h 17m1 stop Chicago O'Hare Intl

C$ 625Multiple Airlines

Sat, 24 Oct - Fri, 30 Oct

7:16 p.m. - 10:59 a.m.SJC San Jose-YYZ Toronto Pearson Intl

12h 43m2 stops Phoenix Sky Harbor Intl Chicago O'Hare Intl

1:15 p.m. - 10:08 p.m.YYZ Toronto Pearson Intl-SJC San Jose

11h 53m2 stops Chicago O'Hare Intl Dallas/Fort Worth

C$ 646American Airlines

Sun, 25 Oct - Sat, 31 Oct

1:00 p.m. - 5:10 a.m.SFO San Francisco-YYZ Toronto Pearson Intl

13h 10m2 stops Calgary Edmonton

9:50 a.m. - 12:45 p.m.YYZ Toronto Pearson Intl-SFO San Francisco

5h 55mdirect

C$ 669Multiple Airlines

Wed, 21 Oct - Wed, 28 Oct

10:42 a.m. - 11:29 p.m.SNA Santa Ana J. Wayne/Orange Cnty-YYZ Toronto Pearson Intl

9h 47m2 stops Dallas/Fort Worth Chicago O'Hare Intl

3:14 p.m. - 10:29 p.m.YYZ Toronto Pearson Intl-SNA Santa Ana J. Wayne/Orange Cnty

10h 15m2 stops Chicago O'Hare Intl Dallas/Fort Worth

C$ 780American Airlines

Tue, 20 Oct - Sat, 31 Oct

Cheap direct flights

Enter your travel dates to find the best prices.

1:45 p.m. - 9:43 p.m.SFO San Francisco-YYZ Toronto Pearson Intl

4h 58mdirect

9:50 a.m. - 12:44 p.m.YYZ Toronto Pearson Intl-SFO San Francisco

5h 54mdirect

C$ 441Porter Airlines

Sat, 14 Nov - Sat, 21 Nov

1:45 p.m. - 9:43 p.m.SFO San Francisco-YYZ Toronto Pearson Intl

4h 58mdirect

9:50 a.m. - 12:44 p.m.YYZ Toronto Pearson Intl-SFO San Francisco

5h 54mdirect

C$ 441Porter Airlines

Fri, 13 Nov - Sat, 21 Nov

2:00 p.m. - 9:49 p.m.SFO San Francisco-YYZ Toronto Pearson Intl

4h 49mdirect

9:50 a.m. - 12:44 p.m.YYZ Toronto Pearson Intl-SFO San Francisco

5h 54mdirect

C$ 498Multiple Airlines

Sat, 14 Nov - Sun, 22 Nov

1:45 p.m. - 9:43 p.m.SFO San Francisco-YYZ Toronto Pearson Intl

4h 58mdirect

9:50 a.m. - 12:44 p.m.YYZ Toronto Pearson Intl-SFO San Francisco

5h 54mdirect

C$ 503Multiple Airlines

Mon, 16 Nov - Fri, 20 Nov

4:40 p.m. - 12:29 a.m.SFO San Francisco-YYZ Toronto Pearson Intl

4h 49mdirect

6:40 p.m. - 9:30 p.m.YYZ Toronto Pearson Intl-SFO San Francisco

5h 50mdirect

C$ 534Air Canada

Mon, 30 Nov - Mon, 7 Dec

12:00 p.m. - 7:55 p.m.SFO San Francisco-YYZ Toronto Pearson Intl

4h 55mdirect

6:40 p.m. - 9:30 p.m.YYZ Toronto Pearson Intl-SFO San Francisco

5h 50mdirect

C$ 551Air Canada

Sun, 1 Nov - Sat, 7 Nov

10:45 p.m. - 6:45 a.m.SFO San Francisco-YYZ Toronto Pearson Intl

5h 00mdirect

6:30 a.m. - 9:09 a.m.YYZ Toronto Pearson Intl-SFO San Francisco

5h 39mdirect

C$ 571United Airlines

Sat, 3 Apr - Fri, 9 Apr

8:13 a.m. - 4:07 p.m.SFO San Francisco-YYZ Toronto Pearson Intl

4h 54mdirect

5:10 p.m. - 8:10 p.m.YYZ Toronto Pearson Intl-SFO San Francisco

6h 00mdirect

C$ 585United Airlines

Thu, 11 Mar - Tue, 16 Mar

1:35 p.m. - 9:18 p.m.LAX Los Angeles-YYZ Toronto Pearson Intl

4h 43mdirect

9:55 a.m. - 12:32 p.m.YYZ Toronto Pearson Intl-LAX Los Angeles

5h 37mdirect

C$ 922American Airlines

Mon, 2 Nov - Sun, 8 Nov

1:35 p.m. - 9:18 p.m.LAX Los Angeles-YYZ Toronto Pearson Intl

4h 43mdirect

9:55 a.m. - 12:32 p.m.YYZ Toronto Pearson Intl-LAX Los Angeles

5h 37mdirect

C$ 923American Airlines

Thu, 12 Nov - Mon, 16 Nov

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Porter Airlines flights from California to Region of Ontario

Our best Porter Airlines deals on California to Region of Ontario flight tickets

Porter Airlines

11 Nov

SFO1:45 p.m.San Francisco

4h 58m

YYZ9:43 p.m.Toronto Pearson Intl

21 Nov

YYZ9:50 a.m.Toronto Pearson Intl

5h 54m

SFO12:44 p.m.San Francisco

C$ 441

Porter Airlines

16 Nov

SFO1:45 p.m.San Francisco

4h 58m

YYZ9:43 p.m.Toronto Pearson Intl

5 Dec

YYZ9:50 a.m.Toronto Pearson Intl

5h 57m

SFO12:47 p.m.San Francisco

C$ 448

Porter Airlines

15 Nov

SFO1:45 p.m.San Francisco

4h 58m

YYZ9:43 p.m.Toronto Pearson Intl

21 Nov

YYZ9:50 a.m.Toronto Pearson Intl

5h 54m

SFO12:44 p.m.San Francisco

C$ 451

WestJet flights from California to Region of Ontario

Our best WestJet deals on California to Region of Ontario flight tickets

WestJet

15 Apr

SFO5:40 p.m.San Francisco

9h 20m

1 stop

YYZ6:00 a.m.Toronto Pearson Intl

22 Apr

YYZ9:35 a.m.Toronto Pearson Intl

10h 15m

1 stop

SFO4:50 p.m.San Francisco

C$ 474

WestJet

11 Dec

SFO4:40 p.m.San Francisco

9h 20m

1 stop

YYZ5:00 a.m.Toronto Pearson Intl

14 Dec

YYZ7:30 a.m.Toronto Pearson Intl

11h 20m

1 stop

SFO3:50 p.m.San Francisco

C$ 503

WestJet

6 Dec

SAN1:30 p.m.San Diego

13h 15m

2 stops

YYZ5:45 a.m.Toronto Pearson Intl

6 Jan

YYZ6:10 a.m.Toronto Pearson Intl

9h 30m

1 stop

SAN12:40 p.m.San Diego

C$ 598

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Los AngelesToronto

LAX Los Angeles - YYZ Toronto Pearson Intl

LAXYYZ

Los Angeles

Tue 2/2

11:09 a.m.-9:50 p.m.

1 stop7h 41m

Toronto Pearson Intl

Mon 22/2

8:30 p.m.-7:39 a.m.

1 stop14h 09m

C$ 417

San FranciscoToronto

SFO San Francisco - YYZ Toronto Pearson Intl

SFOYYZ

San Francisco

Wed 2/12

10:35 a.m.-9:52 p.m.

1 stop8h 17m

Toronto Pearson Intl

Mon 7/12

8:30 p.m.-9:34 a.m.

1 stop16h 04m

C$ 430

San FranciscoToronto

SFO San Francisco - YYZ Toronto Pearson Intl

SFOYYZ

San Francisco

Wed 11/11

1:45 p.m.-9:43 p.m.

Nonstop4h 58m

Toronto Pearson Intl

Sat 21/11

9:50 a.m.-12:44 p.m.

Nonstop5h 54m

C$ 441

San FranciscoToronto

SFO San Francisco - YYZ Toronto Pearson Intl

SFOYYZ

San Francisco

Fri 4/12

1:45 p.m.-9:42 p.m.

Nonstop4h 57m

Toronto Pearson Intl

Mon 14/12

9:50 a.m.-12:47 p.m.

Nonstop5h 57m

C$ 441

Los AngelesToronto

LAX Los Angeles - YYZ Toronto Pearson Intl

LAXYYZ

Los Angeles

Thu 29/10

8:30 a.m.-8:50 p.m.

1 stop9h 20m

Toronto Pearson Intl

Tue 3/11

8:00 a.m.-10:34 a.m.

Nonstop5h 34m

C$ 445

Los AngelesToronto

LAX Los Angeles - YYZ Toronto Pearson Intl

LAXYYZ

Los Angeles

Thu 26/11

5:00 p.m.-5:00 a.m.

1 stop9h 00m

Toronto Pearson Intl

Tue 1/12

7:30 a.m.-4:10 p.m.

1 stop11h 40m

C$ 510

San FranciscoToronto

SFO San Francisco - YYZ Toronto Pearson Intl

SFOYYZ

San Francisco

Fri 13/11

6:30 a.m.-7:57 p.m.

1 stop10h 27m

Toronto Pearson Intl

Thu 19/11

1:00 p.m.-9:33 p.m.

1 stop11h 33m

C$ 513

Los AngelesToronto

LAX Los Angeles - YYZ Toronto Pearson Intl

LAXYYZ

Los Angeles

Thu 26/11

12:10 p.m.-5:45 a.m.

2 stops14h 35m

Toronto Pearson Intl

Tue 1/12

7:30 a.m.-4:10 p.m.

1 stop11h 40m

C$ 513

San FranciscoToronto

SFO San Francisco - YYZ Toronto Pearson Intl

SFOYYZ

San Francisco

Thu 10/12

5:00 a.m.-3:02 p.m.

1 stop7h 02m

Toronto Pearson Intl

Thu 10/12

5:10 p.m.-8:03 p.m.

Nonstop5h 53m

C$ 567

Quickest round-trip

San FranciscoToronto

SFO San Francisco - YYZ Toronto Pearson Intl

SFOYYZ

San Francisco

Sat 3/4

10:45 p.m.-6:45 a.m.

Nonstop5h 00m

Toronto Pearson Intl

Fri 9/4

6:30 a.m.-9:09 a.m.

Nonstop5h 39m

C$ 571

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from California to Region of Ontario

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

Other information

What is the cheapest month to fly to Region of Ontario?

In general, January is the cheapest month to fly from California to Region of Ontario. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around C$ 557. If you are unable to visit Region of Ontario during the month of January, then departing from California during the month February is also very affordable. Most momondo users find prices during this month for around C$ 558.

What is the cheapest day to depart on your flight to Region of Ontario?

The cheapest day to depart from California to Region of Ontario is on a Friday. Travellers who choose to depart for Region of Ontario on a Friday will often find tickets for as low as C$ 600. The most expensive day to fly to Region of Ontario is Wednesday, with ticket prices averaging around C$ 672.

What is the cheapest time of day to depart on your flight to Region of Ontario?

Our most recent data shows that the best time of day to fly to Region of Ontario is in the afternoon. Flights from California to Region of Ontario during this time can be as low as C$ 478. If you have a flexible travel schedule, then try to avoid flying in the morning when prices are C$ 691 on average. Flights to Region of Ontario from California in the morning are generally more expensive because this time of day is more convenient for travellers’ schedules.

What is the cheapest California to Ontario flight route?

Fly from San Francisco to Toronto Pearson Intl for the best California - Ontario flight prices

How far in advance should I book a flight from California to Ontario?

You are more likely to see cheaper flights to Region of Ontario from California when booking weeks ahead of your departure date. In general, you can expect to find flights to Region of Ontario for around C$ 677 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Region of Ontario from California for as low as C$ 608 on momondo.

What cabin class options are available on California to Region of Ontario flights?

There are 4 cabin classes available to choose from on California to Region of Ontario flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on California to Region of Ontario flights?

You could potentially save up to 17% on your flight if you consider stops on a California to Region of Ontario flight.

Cheap California to Region of Ontario flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from California to Region of Ontario

Best price found	C$ 209
Fastest flight time	4h 15m
Direct flights	Every day
Airports in Region of Ontario	125 airports

The best one-way flight to Region of Ontario from California in the past 72 hours is C$ 209. The best round-trip flight deal from California to Region of Ontario found on momondo in the last 72 hours is C$ 417.

The fastest flight from California to Region of Ontario takes 4h 15m

Direct flights go from California to Region of Ontario every day.

There are 125 airports in Region of Ontario. From California there are direct flights to Toronto Pearson Intl (YYZ).

Search flight deals

Frequently asked questions about flying from California to Ontario

When did momondo last update prices for flights from California to Ontario?
Prices for flights from California to Ontario refresh daily.
How many operators does momondo search for flights from California to Ontario?
The number of operators available for flights from California to Ontario is 6 as of October 2026.
How old do you have to be to fly from California to Ontario?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from California to Ontario.
What documentation or ID do you need to fly to Ontario?
The travel and health documents you'll need for your trip to Ontario may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Ontario. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.
What is the most popular plane model from California to Region of Ontario?
Based on momondo bookings for this flight route, the most popular plane model on flight routes from California to Region of Ontario is Embraer 195 E2 (44.30% of total bookings). The next most popular plane models are Airbus A321-100/200 (21.17%), Airbus A320-100/200 (11.81%), and Boeing 737 MAX 9 (3.49%).

Best airlines flying from California to Region of Ontario

Compare and see reviews for airlines that fly from California to Region of Ontario with momondo

Airline	Rating	Free Cancellation	Price
American Airlines	PriceFrom C$ 266	Free Cancellation	Rating 7.0 12,173 reviews	Search American Airlines flights
Air Canada	PriceFrom C$ 270	Free Cancellation	Rating 7.1 11,782 reviews	Search Air Canada flights
Porter Airlines	PriceFrom C$ 295	Free Cancellation	Rating 8.0 468 reviews	Search Porter Airlines flights
WestJet	PriceFrom C$ 307	Free Cancellation	Rating 7.2 3,447 reviews	Search WestJet flights
Delta	PriceFrom C$ 337	Free Cancellation	Rating 7.8 8,651 reviews	Search Delta flights
United Airlines	PriceFrom C$ 455	Free Cancellation	Rating 7.3 10,387 reviews	Search United Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from California to Ontario?

It is quick and easy to find California to Ontario flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Ontario that suits you.

Can I find flights from California to Ontario with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for California to Ontario flights to just show those with flexible booking policies.

How can momondo help me find flights from California to Ontario?

momondo helps you find the best flight between California and Ontario by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

I’m not ready to book a flight from California to Ontario right now. Can momondo alert me if prices change?

If you are simply researching potential flights to Ontario, momondo offers a useful price alert feature which will track prices for flights to Ontario from California and alert you when they change.

An easier way to manage your Region of Ontario trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

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Popular cities

Other flights from California

Other flights to Ontario

Airlines

Complete your trip

Feeling lucky

Popular Cities in Ontario

Flights to Torontofrom C$ 174

Flights to Vancouverfrom C$ 106

Flights to Calgaryfrom C$ 123

Flights to Montrealfrom C$ 281

Flights to Halifaxfrom C$ 172

Flights to Winnipegfrom C$ 168

Flights to Ottawafrom C$ 301

Flights to Kelownafrom C$ 148

Flights to Saskatoonfrom C$ 261

Flights to St. John'sfrom C$ 290

Flights to Reginafrom C$ 310

Flights to Vancouverfrom C$ 105

Cheap flights from California to Ontario from C$ 209

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from California to Ontario departing on 8/1. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

Find the cheapest flights from California to Ontario

Cheap round-trip flights

Cheap one-way flights

Cheap last-minute flights

Cheap direct flights

Big names, great deals

Big names, great deals

Filter for what you want

Filter for what you want

Trusted and free

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Porter Airlines flights from California to Region of Ontario

Our best Porter Airlines deals on California to Region of Ontario flight tickets

WestJet flights from California to Region of Ontario

Our best WestJet deals on California to Region of Ontario flight tickets

momondo Fare Finder

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

See travel insights to Ontario from

How to get the cheapest flight ticket from California to Region of Ontario

What is the cheapest month to fly to Region of Ontario?

What is the cheapest day to depart on your flight to Region of Ontario?

What is the cheapest time of day to depart on your flight to Region of Ontario?

What is the cheapest California to Ontario flight route?

How far in advance should I book a flight from California to Ontario?

What cabin class options are available on California to Region of Ontario flights?

Can stopping save me money on California to Region of Ontario flights?

What is the cheapest airline that flies from California to Ontario?

Which airlines fly to Region of Ontario?

How many flights depart from California to Region of Ontario on average per day?

How many flights depart from California to Region of Ontario on average per week?

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

Cheap California to Region of Ontario flight deals and tips

Best price found

Fastest flight time

Direct flights

Airports in Region of Ontario

Frequently asked questions about flying from California to Ontario

Best airlines flying from California to Region of Ontario

Compare and see reviews for airlines that fly from California to Region of Ontario with momondo

Why use momondo?

An easier way to manage your Region of Ontario trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to Ontario

Popular Cities in Ontario

Popular flights according to clicks in the last 7 days on momondo

California flight routes

According to popular flight searches on momondo this year

Region of Ontario flight routes

According to popular flight searches on momondo this year

Fly your favourite airline to Ontario

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Complete your trip to Ontario

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According to popular flight searches on momondo this year