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

Porter Airlines, WestJet, and United Airlines are the most popular carriers operating from California to Ontario

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 42m on average, while flying from San Diego to Toronto Pearson Intl Airport is 4h 50m 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 42% of people opting to fly with this airline when traveling to Region of Ontario. Keep in mind that there are 7 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?

420 flights are operational weekly from California to Region of Ontario as of December 2025. The most popular departure day for this route is Fri, with 17% of flights per week taking off on this day.

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

As of December 2025, 60 flights take off from California and land in Region of Ontario each day. The most common flight departure time for this route is 8:00AM, with 50% of daily flights taking off in the afternoon.

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 7 as of December 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.

$85 Cheap Flights from California to Ontario in 2025/26

1 adult

0 bags

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Not ready to book? to track prices.

Search flight deals

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.

8:00 am - 11:39 pm

LAS

YYZ

12h 39m2 stops

1:30 pm - 9:33 pm

YYZ

LAS

11h 03m1 stop

$128WestJet

Sat, Jan 31 - Tue, Feb 10

7:05 pm - 7:00 am

LAS

YYZ

8h 55m1 stop

9:40 am - 6:11 pm

YYZ

LAS

11h 31m2 stops

$133WestJet

Sun, Jan 11 - Sat, Jan 17

8:00 am - 11:39 pm

LAS

YYZ

12h 39m2 stops

7:55 pm - 10:02 pm

YYZ

LAS

5h 07mnonstop

$139Multiple Airlines

Sat, Jan 31 - Sat, Feb 7

2:34 pm - 6:47 am

ONT

YYZ

13h 13m1 stop

12:30 pm - 10:09 am

YYZ

ONT

24h 39m2 stops

$218Multiple Airlines

Mon, Jan 12 - Wed, Jan 21

2:20 pm - 9:52 pm

PSP

YYZ

4h 32mnonstop

10:50 am - 1:14 pm

YYZ

PSP

5h 24mnonstop

$234Porter Airlines

Mon, Jan 12 - Thu, Jan 15

2:20 pm - 9:52 pm

PSP

YYZ

4h 32mnonstop

10:50 am - 1:14 pm

YYZ

PSP

5h 24mnonstop

$240Porter Airlines

Sat, Jan 10 - Sat, Jan 17

6:00 pm - 11:42 am

SFO

YTZ

14h 42m2 stops

10:25 am - 9:22 pm

YTZ

SFO

13h 57m2 stops

$355Air Canada

Tue, Feb 3 - Tue, Feb 10

8:25 am - 7:55 pm

SFO

YTZ

8h 30m1 stop

12:30 pm - 9:22 pm

YTZ

SFO

11h 52m2 stops

$368Air Canada

Tue, Feb 3 - Tue, Feb 10

2:11 pm - 11:59 pm

SAN

YYZ

6h 48m1 stop

11:00 am - 8:49 pm

YYZ

SAN

12h 49m2 stops

$404United Airlines

Fri, Jan 9 - Tue, Jan 13

8:37 pm - 9:58 am

SAN

YYZ

10h 21m2 stops

3:30 pm - 12:15 am

YYZ

SAN

11h 45m2 stops

$414United Airlines

Mon, Feb 2 - Mon, Feb 9

WestJet flights from California to Region of Ontario

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

WestJet

Jan 31

LAS8:00 amLas Vegas Harry Reid Intl

12h 39m

2 stops

YYZ11:39 pmToronto Pearson Intl

Feb 8

YYZ10:00 amToronto Pearson Intl

11h 13m

1 stop

LAS6:13 pmLas Vegas Harry Reid Intl

$128

Find similar

WestJet

Jan 11

LAS7:05 pmLas Vegas Harry Reid Intl

8h 55m

1 stop

YYZ7:00 amToronto Pearson Intl

Jan 17

YYZ9:40 amToronto Pearson Intl

11h 31m

2 stops

LAS6:11 pmLas Vegas Harry Reid Intl

$133

Find similar

WestJet

Jan 12

LAS11:20 amLas Vegas Harry Reid Intl

8h 51m

1 stop

YYZ11:11 pmToronto Pearson Intl

Jan 13

YYZ9:40 amToronto Pearson Intl

11h 31m

2 stops

LAS6:11 pmLas Vegas Harry Reid Intl

$134

Find similar

Porter Airlines flights from California to Region of Ontario

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

Porter Airlines

Jan 14

LAS12:40 pmLas Vegas Harry Reid Intl

4h 15m

YYZ7:55 pmToronto Pearson Intl

Jan 17

YYZ7:55 pmToronto Pearson Intl

5h 07m

LAS10:02 pmLas Vegas Harry Reid Intl

$162

Find similar

Porter Airlines

Jan 12

PSP2:20 pmPalm Springs

4h 32m

YYZ9:52 pmToronto Pearson Intl

Jan 15

YYZ10:50 amToronto Pearson Intl

5h 24m

PSP1:14 pmPalm Springs

$234

Find similar

Porter Airlines

Jan 10

PSP2:20 pmPalm Springs

4h 32m

YYZ9:52 pmToronto Pearson Intl

Jan 17

YYZ10:50 amToronto Pearson Intl

5h 24m

PSP1:14 pmPalm Springs

$240

Find similar

Fly from

Fly to

Route

Depart

Return

Price

Las VegasToronto

LAS - YYZ

LASYYZ

Las Vegas Harry Reid Intl

Sat 1/31

8:00 am-11:39 pm

2 stops12h 39m

Toronto Pearson Intl

Tue 2/10

1:30 pm-9:33 pm

1 stop11h 03m

$128

Las VegasToronto

LAS - YYZ

LASYYZ

Las Vegas Harry Reid Intl

Sun 1/11

7:05 pm-7:00 am

1 stop8h 55m

Toronto Pearson Intl

Sat 1/17

9:40 am-6:11 pm

2 stops11h 31m

$133

Las VegasToronto

LAS - YYZ

LASYYZ

Las Vegas Harry Reid Intl

Sat 1/31

8:00 am-11:39 pm

2 stops12h 39m

Toronto Pearson Intl

Sat 2/7

7:55 pm-10:02 pm

Nonstop5h 07m

$139

OntarioToronto

ONT - YYZ

ONTYYZ

Ontario

Mon 1/12

2:34 pm-6:47 am

1 stop13h 13m

Toronto Pearson Intl

Wed 1/21

12:30 pm-10:09 am

2 stops24h 39m

$218

Palm SpringsToronto

PSP - YYZ

PSPYYZ

Palm Springs

Mon 1/12

2:20 pm-9:52 pm

Nonstop4h 32m

Toronto Pearson Intl

Thu 1/15

10:50 am-1:14 pm

Nonstop5h 24m

$234

Palm SpringsToronto

PSP - YYZ

PSPYYZ

Palm Springs

Sat 1/10

2:20 pm-9:52 pm

Nonstop4h 32m

Toronto Pearson Intl

Sat 1/17

10:50 am-1:14 pm

Nonstop5h 24m

$240

San FranciscoToronto

SFO - YTZ

SFOYTZ

San Francisco

Tue 2/3

6:00 pm-11:42 am

2 stops14h 42m

Toronto Island

Tue 2/10

10:25 am-9:22 pm

2 stops13h 57m

$355

San FranciscoToronto

SFO - YTZ

SFOYTZ

San Francisco

Tue 2/3

8:25 am-7:55 pm

1 stop8h 30m

Toronto Island

Tue 2/10

12:30 pm-9:22 pm

2 stops11h 52m

$368

San DiegoToronto

SAN - YYZ

SANYYZ

San Diego

Fri 1/9

2:11 pm-11:59 pm

1 stop6h 48m

Toronto Pearson Intl

Tue 1/13

11:00 am-8:49 pm

2 stops12h 49m

$404

San DiegoToronto

SAN - YYZ

SANYYZ

San Diego

Mon 2/2

8:37 pm-9:58 am

2 stops10h 21m

Toronto Pearson Intl

Mon 2/9

3:30 pm-12:15 am

2 stops11h 45m

$414

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 $265. If you aren’t able to travel during the month of May, then book flights to Region of Ontario from California during June instead. Flights to Region of Ontario in June, while not as cheap as those in May, still average around $274.

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 $369. 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 $595. 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 $308. 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 $595.

What is the cheapest California to Ontario flight route?

Fly from Palm Springs 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 $324 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 $212 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 15% 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	$88
Fastest flight time	4h 10m
Direct flights	Every day
Airports in Region of Ontario	123 airports

The best one-way flight to Region of Ontario from California in the past 72 hours is $88. The best round-trip flight deal from California to Region of Ontario found on momondo in the last 72 hours is $261.

The fastest flight from California to Region of Ontario takes 4h 10m

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

There are 123 airports in Region of Ontario. From California there are direct flights to 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 7 as of December 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 36.19% of all bookings. The subsequent popular models are Boeing 737 MAX 8 at 17.49%, Airbus A321-100/200 at 15.22%, and Airbus A220-300 at 11.98%.

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
United Airlines	PriceFrom $105	Free Cancellation	Rating 7.4 9,099 reviews	Search United Airlines flights
Porter Airlines	PriceFrom $118	Free Cancellation	Rating 8.0 399 reviews	Search Porter Airlines flights
WestJet	PriceFrom $119	Free Cancellation	Rating 7.2 3,208 reviews	Search WestJet flights
Air Transat	PriceFrom $122	Free Cancellation	Rating 7.8 484 reviews	Search Air Transat flights
Delta	PriceFrom $131	Free Cancellation	Rating 7.9 8,021 reviews	Search Delta flights
Air Canada	PriceFrom $136	Free Cancellation	Rating 7.1 10,549 reviews	Search Air Canada flights
American Airlines	PriceFrom $256	Free Cancellation	Rating 7.2 11,050 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.

Start using Trips

Find my bookings

Get notified when prices go down

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

1 adult

Tue 1/20

Tue 1/27

Email me momondo's favorite deals

By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to Ontario

Popular cities in Ontario

Flights to Torontofrom $110

Flights to Vancouverfrom $83

Flights to Montrealfrom $166

Flights to Calgaryfrom $133

Flights to Ottawafrom $105

Flights to Halifaxfrom $206

Flights to Winnipegfrom $154

Flights to Québec Cityfrom $259

Flights to Saskatoonfrom $162

Flights to Kelownafrom $131

Flights to St. John'sfrom $238

Flights to Reginafrom $141

California flight routes

Flights from Santa Ana J. Wayne/Orange Cnty to Colorado Springs

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 Jose to Los Angeles

Flights from Ontario to Las Vegas Harry Reid Intl

Flights from Sacramento Intl to Las Vegas Harry Reid Intl

Cheap flights from California to Ontario from $85

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 1/28. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

Big names and deals

Big names and deals

Filter for what you want

Filter for what you want

Trusted and free

Trusted and free

Price Alerts

Price Alerts

Find the cheapest flights from California to Ontario

Cheap round-trip flights

Cheap one-way flights

Cheap last minute flights

Cheap direct flights

WestJet flights from California to Region of Ontario

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

Porter Airlines flights from California to Region of Ontario

Our best Porter Airlines 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?

Fly from Palm Springs 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 15% 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?

Porter Airlines, WestJet, and United Airlines 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 December 2025, 60 flights take off from California and land in Region of Ontario each day. The most common flight departure time for this route is 8:00AM, with 50% of daily flights taking off in the afternoon.

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

420 flights are operational weekly from California to Region of Ontario as of December 2025. The most popular departure day for this route is Fri, with 17% 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