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

Air Transat, WestJet, and Air Canada are the most popular carriers operating from California to Ontario

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

As of September 2025, 67 flights take off from California and land in Region of Ontario each day. The most common flight departure time for this route is 1:00PM, with 46% of daily flights taking off in the afternoon.

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

Average flight duration from California to Region of Ontario depends on which airport you fly into and out of. Flying from Los Angeles to Toronto Pearson Intl Airport is 4h 35m on average, while flying from Sacramento to Toronto Pearson Intl Airport is 4h 49m on average. Toronto Pearson Intl Airport is the most popular airport in Region of Ontario.

What 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 40% of people opting to fly with this airline when traveling to Region of Ontario. Keep in mind that there are 8 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?

473 flights are operational weekly from California to Region of Ontario as of September 2025. The most popular departure day for this route is Mon, with 15% of flights per week taking off on this day.

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

Prices for flights from California to Ontario are updated 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 8 as of September 2025.

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

The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check 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 required travel and health documents for your Ontario trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Ontario. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$82 Cheap Flights from California to Ontario in 2025/26

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Find the cheapest flights from California to Ontario

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

7:00 am - 12:31 amLAX-YYZ

14h 31m2 stops

8:00 am - 6:09 pmYYZ-LAX

13h 09m2 stops

$165WestJet

Find Deal

Thu, Oct 9 - Sun, Oct 19

11:10 pm - 7:00 amLAX-YYZ

4h 50mnonstop

9:00 am - 8:21 pmYYZ-LAX

14h 21m2 stops

$166WestJet

Find Deal

Fri, Oct 10 - Sun, Oct 12

2:00 pm - 9:50 pmLAX-YYZ

4h 50mnonstop

12:00 pm - 6:09 pmYYZ-LAX

9h 09m1 stop

$167Multiple Airlines

Find Deal

Wed, Oct 8 - Sat, Oct 11

2:00 pm - 9:50 pmLAX-YYZ

4h 50mnonstop

12:00 pm - 6:09 pmYYZ-LAX

9h 09m1 stop

$168Multiple Airlines

Find Deal

Thu, Oct 9 - Wed, Oct 15

10:30 pm - 11:45 amLAX-YTZ

10h 15m1 stop

8:25 pm - 11:05 amYTZ-LAX

17h 40m1 stop

$210Air Canada

Find Deal

Thu, Oct 16 - Sun, Oct 19

10:30 pm - 10:39 amLAX-YYZ

9h 09m1 stop

6:35 pm - 8:53 pmYYZ-LAX

5h 18mnonstop

$213Air Canada

Find Deal

Wed, Oct 1 - Sat, Oct 4

10:30 pm - 6:53 amLAX-YUL

5h 23mnonstop

6:45 pm - 9:35 pmYUL-LAX

5h 50mnonstop

$301United Airlines

Find Deal

Sat, Oct 18 - Mon, Oct 20

8:15 am - 8:05 pmLAX-YUL

8h 50m1 stop

6:45 pm - 9:35 pmYUL-LAX

5h 50mnonstop

$311United Airlines

Find Deal

Sat, Oct 18 - Wed, Oct 22

1:40 pm - 12:35 amSFO-YUL

7h 55m1 stop

6:45 am - 12:40 pmYUL-SFO

8h 55m1 stop

$372Porter Airlines

Find Deal

Sun, Nov 2 - Fri, Nov 7

1:25 pm - 12:37 amSFO-YUL

8h 12m1 stop

6:45 am - 12:23 pmYUL-SFO

8h 38m1 stop

$373Porter Airlines

Find Deal

Mon, Sep 29 - Sat, Oct 4

WestJet flights from California to Region of Ontario

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

WestJet

Oct 9

LAX7:00 amLos Angeles

14h 31m

2 stops

YYZ12:31 amToronto Pearson Intl

Oct 19

YYZ8:00 amToronto Pearson Intl

13h 09m

2 stops

LAX6:09 pmLos Angeles

$165

Find similar

WestJet

Oct 10

LAX11:10 pmLos Angeles

4h 50m

YYZ7:00 amToronto Pearson Intl

Oct 12

YYZ9:00 amToronto Pearson Intl

14h 21m

2 stops

LAX8:21 pmLos Angeles

$166

Find similar

WestJet

Sep 29

LAX7:00 amLos Angeles

11h 01m

2 stops

YYZ9:01 pmToronto Pearson Intl

Oct 7

YYZ12:00 pmToronto Pearson Intl

9h 09m

1 stop

LAX6:09 pmLos Angeles

$167

Find similar

Delta flights from California to Region of Ontario

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

Delta

Sep 25

SNA6:45 amSanta Ana J. Wayne/Orange Cnty

12h 06m

1 stop

YYZ9:51 pmToronto Pearson Intl

Oct 4

YYZ6:30 amToronto Pearson Intl

6h 50m

1 stop

SNA10:20 amSanta Ana J. Wayne/Orange Cnty

$416

Find similar

Delta

Sep 17

SNA12:13 pmSanta Ana J. Wayne/Orange Cnty

8h 42m

1 stop

YYZ11:55 pmToronto Pearson Intl

Sep 19

YYZ6:15 amToronto Pearson Intl

9h 27m

1 stop

SNA12:42 pmSanta Ana J. Wayne/Orange Cnty

$437

Find similar

Fly from

Fly to

Route

Depart

Return

Price

Los AngelesToronto

LAX - YYZ

LAXYYZ

Los Angeles

Thu 10/9

7:00 am-12:31 am

2 stops14h 31m

Toronto Pearson Intl

Sun 10/19

8:00 am-6:09 pm

2 stops13h 09m

$165

Los AngelesToronto

LAX - YYZ

LAXYYZ

Los Angeles

Fri 10/10

11:10 pm-7:00 am

Nonstop4h 50m

Toronto Pearson Intl

Sun 10/12

9:00 am-8:21 pm

2 stops14h 21m

$166

Los AngelesToronto

LAX - YYZ

LAXYYZ

Los Angeles

Wed 10/8

2:00 pm-9:50 pm

Nonstop4h 50m

Toronto Pearson Intl

Sat 10/11

12:00 pm-6:09 pm

1 stop9h 09m

$167

Los AngelesToronto

LAX - YYZ

LAXYYZ

Los Angeles

Thu 10/9

2:00 pm-9:50 pm

Nonstop4h 50m

Toronto Pearson Intl

Wed 10/15

12:00 pm-6:09 pm

1 stop9h 09m

$168

Los AngelesToronto

LAX - YTZ

LAXYTZ

Los Angeles

Thu 10/16

10:30 pm-11:45 am

1 stop10h 15m

Toronto Island

Sun 10/19

8:25 pm-11:05 am

1 stop17h 40m

$210

Los AngelesToronto

LAX - YYZ

LAXYYZ

Los Angeles

Wed 10/1

10:30 pm-10:39 am

1 stop9h 09m

Toronto Pearson Intl

Sat 10/4

6:35 pm-8:53 pm

Nonstop5h 18m

$213

Los AngelesMontreal

LAX - YUL

LAXYUL

Los Angeles

Sat 10/18

10:30 pm-6:53 am

Nonstop5h 23m

Montreal Pierre Elliott Trudeau Intl

Mon 10/20

6:45 pm-9:35 pm

Nonstop5h 50m

$301

Los AngelesMontreal

LAX - YUL

LAXYUL

Los Angeles

Sat 10/18

8:15 am-8:05 pm

1 stop8h 50m

Montreal Pierre Elliott Trudeau Intl

Wed 10/22

6:45 pm-9:35 pm

Nonstop5h 50m

$311

San FranciscoMontreal

SFO - YUL

SFOYUL

San Francisco

Sun 11/2

1:40 pm-12:35 am

1 stop7h 55m

Montreal Pierre Elliott Trudeau Intl

Fri 11/7

6:45 am-12:40 pm

1 stop8h 55m

$372

San FranciscoMontreal

SFO - YUL

SFOYUL

San Francisco

Mon 9/29

1:25 pm-12:37 am

1 stop8h 12m

Montreal Pierre Elliott Trudeau Intl

Sat 10/4

6:45 am-12:23 pm

1 stop8h 38m

$373

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?

The month of May is, on average, the cheapest month to fly to Region of Ontario from California, with most prices found around $266. If you aren’t able to travel during the month of May, then book flights to Region of Ontario from California during October instead. Flights to Region of Ontario in October, while not as cheap as those in May, still average around $277.

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

According to our data, Thursday is the cheapest day to fly to Region of Ontario from California. The lowest ticket price found for a Thursday departure recently was $358. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. Flights from California to Region of Ontario on a Sunday will generally be more expensive and average around $560. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

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

According to our data, the cheapest time of day to fly to Region of Ontario is at noon. momondo users have found flights departing from California to Region of Ontario at noon for as low as $299. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights in the morning are often more expensive with an average ticket price of $551.

What is the cheapest California to Ontario flight route?

Fly from Los Angeles to Toronto Pearson Intl for the best California - Ontario flight prices

How far in advance should I book a flight to Region of 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 $315 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 $219 on momondo.

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

There are 4 cabin classes available to choose from on California to 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	$155
Fastest flight time	4h 35m
Direct flights	Mon, Wed, Thu, Fri, Sat and Sun
Airports in Region of Ontario	1 airport

The best one-way flight to Region of Ontario from California in the past 72 hours is $155. The best round-trip flight deal from California to Region of Ontario found on momondo in the last 72 hours is $286.

The fastest flight from California to Region of Ontario takes 4h 35m

Direct flights go from California to Region of Ontario on Monday, Wednesday, Thursday, Friday, Saturday and Sunday. The only airline offering direct flights is Air Canada.

There is 1 airport near Region of Ontario: Toronto Pearson Intl (YYZ)

Search flight deals

When did momondo last update prices for flights from California to Ontario?
Prices for flights from California to Ontario are updated 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 8 as of September 2025.
How old do you have to be to fly from California to Ontario?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check 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 required travel and health documents for your Ontario trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Ontario. We recommend that you seek guidance from your airline or a reliable third party such as IATA.
What is the most popular plane model from California to Region of Ontario?
momondo data reveals that the most frequently booked plane model on the route from California to Region of Ontario is Embraer 195 E2, representing 31.66% of all bookings. The subsequent popular models are Airbus A321-100/200 at 16.97%, Boeing 737 MAX 8 at 14.78%, and Airbus A220-300 at 9.21%.

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
Porter Airlines	PriceFrom $20	Free Cancellation	Rating 7.9 363 reviews	Search Porter Airlines flights
Frontier	PriceFrom $36	Free Cancellation	Rating 5.8 3,174 reviews	Search Frontier flights
WestJet	PriceFrom $120	Free Cancellation	Rating 7.2 3,093 reviews	Search WestJet flights
United Airlines	PriceFrom $131	Free Cancellation	Rating 7.4 8,924 reviews	Search United Airlines flights
Delta	PriceFrom $131	Free Cancellation	Rating 7.9 7,957 reviews	Search Delta flights
Air Canada	PriceFrom $132	Free Cancellation	Rating 7.1 10,000 reviews	Search Air Canada flights
Air Transat	PriceFrom $146	Free Cancellation	Rating 7.7 438 reviews	Search Air Transat flights
American Airlines	PriceFrom $235	Free Cancellation	Rating 7.2 10,000 reviews	Search American Airlines flights

Why use momondo?

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

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from California to Ontario. momondo saves you time and could save you money on your trip.

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

Yes. All flights to Ontario from California on momondo can be compared and filtered by various policies on offer, including flexible booking.

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

momondo provides multiple filters to help you find the best flight to Ontario from California. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

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

Of course. momondo tracks the price of California to Ontario flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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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Find better results for your trip to Ontario

Popular cities in Ontario

Flights to Torontofrom $98

Flights to Vancouverfrom $85

Flights to Montrealfrom $186

Flights to Calgaryfrom $132

Flights to Ottawafrom $190

Flights to Halifaxfrom $188

Flights to Winnipegfrom $157

Flights to Québec Cityfrom $177

Flights to Saskatoonfrom $117

Flights to Kelownafrom $156

Flights to St. John'sfrom $244

Flights to Reginafrom $206

California flight routes

Flights from Santa Ana J. Wayne/Orange Cnty to Las Vegas Harry Reid Intl

Flights from Los Angeles to Las Vegas Harry Reid Intl

Flights from San Diego to Las Vegas Harry Reid Intl

Flights from Sacramento Intl to Las Vegas Harry Reid Intl

Flights from San Diego to Oakland

Flights from Burbank Bob Hope to Las Vegas Harry Reid Intl

Cheap flights from California to Ontario from $82

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 10/23. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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Big names and deals

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Filter for what you want

Trusted and free

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WestJet flights from California to Region of Ontario

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

Delta flights from California to Region of Ontario

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

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

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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

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?

Fly from Los Angeles to Toronto Pearson Intl for the best California - Ontario flight prices

How far in advance should I book a flight to Region of Ontario?

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

There are 4 cabin classes available to choose from on California to 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.

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

Air Transat, WestJet, and Air Canada are the most popular carriers operating from California to Ontario

What airlines fly to Region of Ontario?

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

As of September 2025, 67 flights take off from California and land in Region of Ontario each day. The most common flight departure time for this route is 1:00PM, with 46% of daily flights taking off in the afternoon.

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

473 flights are operational weekly from California to Region of Ontario as of September 2025. The most popular departure day for this route is Mon, with 15% of flights per week taking off on this day.

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

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

Fastest flight time

Direct flights

Airports in Region of Ontario

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

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

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

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

What is the most popular plane model from California to Region of 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?

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

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

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

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

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