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

The number of flights available between Ontario and California is 19 per day as of May 2026. The most frequent departure time is 6:00AM, with 41% of daily flights leaving at noon.

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

139 flights are operational weekly from Ontario to California as of May 2026. The most popular departure day for this route is Tue, with 21% of flights per week taking off on this day.

What airlines fly to California?

Southwest, United Airlines and Frontier are the top three most popular airlines that fly to California from Ontario according to our data. Southwest is the first choice among our users, with 29% of people opting to fly with this airline when traveling to California. Keep in mind that there are 11 different airlines that fly to California on a routine basis, so you have a few additional options to choose from.

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

Southwest, Frontier, and Alaska Airlines are the most popular carriers operating from Ontario to California

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

Prices for flights from Ontario Airport to California refresh daily.

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

As of May 2026, there are 8 operators available to choose from for flights from Ontario Airport to California.

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

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Ontario Airport to California.

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

The travel and health documents required for your trip to California can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at California. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

$44 Cheap Flights from Ontario to California in 2026

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 Ontario to California

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

Enter your travel dates to find the best prices.

1:28 pm - 2:39 pm

ONT

LAS

1h 11mnonstop

6:46 pm - 7:53 pm

LAS

ONT

1h 07mnonstop

$73Frontier

Tue, Aug 11 - Thu, Aug 13

3:30 pm - 4:43 pm

ONT

LAS

1h 13mnonstop

1:59 pm - 3:09 pm

LAS

ONT

1h 10mnonstop

$75Frontier

Sat, May 30 - Mon, Jun 1

6:10 am - 7:25 am

ONT

SJC

1h 15mnonstop

8:55 pm - 10:10 pm

SJC

ONT

1h 15mnonstop

$137Southwest

Tue, Jun 16 - Tue, Jun 23

3:35 pm - 5:04 pm

ONT

STS

1h 29mnonstop

5:44 pm - 7:08 pm

STS

ONT

1h 24mnonstop

$137Alaska Airlines

Tue, May 26 - Sat, May 30

5:45 am - 7:00 am

ONT

SJC

1h 15mnonstop

6:20 pm - 11:00 pm

SJC

ONT

4h 40m

1 stop

$147Southwest

Tue, Jun 2 - Wed, Jun 10

3:35 pm - 5:04 pm

ONT

STS

1h 29mnonstop

5:44 pm - 7:08 pm

STS

ONT

1h 24mnonstop

$157Alaska Airlines

Thu, May 28 - Sat, May 30

3:30 pm - 1:15 pm

ONT

FAT

21h 45m

1 stop

3:31 pm - 7:32 pm

FAT

ONT

4h 01m

1 stop

$168Multiple Airlines

Mon, Jun 1 - Mon, Jun 8

11:51 am - 2:47 pm

ONT

FAT

26h 56m

1 stop

3:31 pm - 7:32 pm

FAT

ONT

4h 01m

1 stop

$173Multiple Airlines

Thu, May 28 - Thu, Jun 4

1:50 pm - 8:07 pm

ONT

ACV

6h 17m

1 stop

6:00 am - 12:12 pm

ACV

ONT

6h 12m

1 stop

$304United Airlines

Wed, Jun 10 - Tue, Jun 16

1:50 pm - 6:02 pm

ONT

ACV

4h 12m

1 stop

6:44 pm - 10:37 pm

ACV

ONT

3h 53m

1 stop

$344United Airlines

Mon, Jun 1 - Mon, Jun 8

Frontier flights from Ontario to California

Our best Frontier deals on Ontario to California flight tickets

Frontier

Aug 11

ONT1:28 pmOntario

1h 11m

LAS2:39 pmLas Vegas Harry Reid Intl

Aug 13

LAS6:46 pmLas Vegas Harry Reid Intl

1h 07m

ONT7:53 pmOntario

$73

Frontier

May 30

ONT3:30 pmOntario

1h 13m

LAS4:43 pmLas Vegas Harry Reid Intl

Jun 1

LAS6:22 pmLas Vegas Harry Reid Intl

1h 10m

ONT7:32 pmOntario

$75

Frontier

May 28

ONT11:51 amOntario

1h 11m

LAS1:02 pmLas Vegas Harry Reid Intl

Jun 1

LAS1:59 pmLas Vegas Harry Reid Intl

1h 10m

ONT3:09 pmOntario

$76

Southwest flights from Ontario to California

Our best Southwest deals on Ontario to California flight tickets

Southwest

Jun 16

ONT6:10 amOntario

1h 15m

SJC7:25 amSan Jose

Jun 23

SJC8:55 pmSan Jose

1h 15m

ONT10:10 pmOntario

$137

Southwest

May 26

ONT5:45 amOntario

1h 15m

SJC7:00 amSan Jose

May 26

SJC2:55 pmSan Jose

4h 40m

1 stop

ONT7:35 pmOntario

$147

Southwest

Jun 2

ONT12:40 pmOntario

7h 50m

2 stops

SJC8:30 pmSan Jose

Jun 10

SJC9:30 amSan Jose

1h 20m

ONT10:50 amOntario

$152

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Quickest round-trip

OntarioLas Vegas

ONT - LAS

ONTLAS

Ontario

Tue 8/11

1:28 pm-2:39 pm

Nonstop1h 11m

Las Vegas Harry Reid Intl

Thu 8/13

6:46 pm-7:53 pm

Nonstop1h 07m

$73

OntarioLas Vegas

ONT - LAS

ONTLAS

Ontario

Sat 5/30

3:30 pm-4:43 pm

Nonstop1h 13m

Las Vegas Harry Reid Intl

Mon 6/1

1:59 pm-3:09 pm

Nonstop1h 10m

$75

OntarioSan Jose

ONT - SJC

ONTSJC

Ontario

Tue 6/16

6:10 am-7:25 am

Nonstop1h 15m

San Jose

Tue 6/23

8:55 pm-10:10 pm

Nonstop1h 15m

$137

OntarioSanta Rosa

ONT - STS

ONTSTS

Ontario

Tue 5/26

3:35 pm-5:04 pm

Nonstop1h 29m

Santa Rosa Sonoma County

Sat 5/30

5:44 pm-7:08 pm

Nonstop1h 24m

$137

OntarioSan Jose

ONT - SJC

ONTSJC

Ontario

Tue 6/2

5:45 am-7:00 am

Nonstop1h 15m

San Jose

Wed 6/10

6:20 pm-11:00 pm

1 stop4h 40m

$147

OntarioSanta Rosa

ONT - STS

ONTSTS

Ontario

Thu 5/28

3:35 pm-5:04 pm

Nonstop1h 29m

Santa Rosa Sonoma County

Sat 5/30

5:44 pm-7:08 pm

Nonstop1h 24m

$157

OntarioFresno

ONT - FAT

ONTFAT

Ontario

Mon 6/1

3:30 pm-1:15 pm

1 stop21h 45m

Fresno Airterminal

Mon 6/8

3:31 pm-7:32 pm

1 stop4h 01m

$168

OntarioFresno

ONT - FAT

ONTFAT

Ontario

Thu 5/28

11:51 am-2:47 pm

1 stop26h 56m

Fresno Airterminal

Thu 6/4

3:31 pm-7:32 pm

1 stop4h 01m

$173

OntarioArcata

ONT - ACV

ONTACV

Ontario

Wed 6/10

1:50 pm-8:07 pm

1 stop6h 17m

Arcata Eureka

Tue 6/16

6:00 am-12:12 pm

1 stop6h 12m

$304

OntarioArcata

ONT - ACV

ONTACV

Ontario

Mon 6/1

1:50 pm-6:02 pm

1 stop4h 12m

Arcata Eureka

Mon 6/8

6:44 pm-10:37 pm

1 stop3h 53m

$344

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 Ontario to California

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 California?

The month of July is another great option to travel to California, with average flight prices from Ontario averaging around $34.

What is the cheapest Ontario to California flight route?

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

Can stopping save me money on Ontario to California flights?

No. A direct flight is the cheapest option for a flight between Ontario to California.

Cheap Ontario to California flight deals and tips

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

Best Price Found	$90
Fastest flight time	1h 00m
Direct flights	Every day
Airports in California	418 airports

The best one-way flight to California from Ontario in the past 72 hours is $90. The best round-trip flight deal from Ontario to California found on momondo in the last 72 hours is $137.

The fastest flight from Ontario to California takes 1h 00m

Direct flights go from Ontario to California every day.

There are 418 airports in California. From Ontario there are direct flights to San Jose (SJC), Las Vegas Harry Reid Intl (LAS).

Search flight deals

Frequently asked questions about flying from Ontario to California

When did momondo last update prices for flights from Ontario Airport to California?
Prices for flights from Ontario Airport to California refresh daily.
How many operators does momondo search for flights from Ontario Airport to California?
As of May 2026, there are 8 operators available to choose from for flights from Ontario Airport to California.
How old do you have to be to fly from Ontario Airport to California?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Ontario Airport to California.
What documentation or ID do you need to fly to California?
The travel and health documents required for your trip to California can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at California. We always recommend checking with your airline or a trusted third party such as IATA to get advice.
What is the most popular plane model from Ontario to California?
Based on momondo bookings for flights between Ontario and California, the leading plane model is Boeing 737 MAX 8, making up 16.39% of the total bookings. Other popular models include Boeing 737-800 Passenger/BBJ2 (winglets) with 12.82%, Boeing 737 MAX 9 with 11.51%, and Airbus A321neo with 8.16%.

Best airlines flying from Ontario to California

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

Airline	Rating	Free Cancellation	Price
Frontier	PriceFrom $29	Free Cancellation	Rating 5.6 2,965 reviews	Search Frontier flights
United Airlines	PriceFrom $73	Free Cancellation	Rating 7.4 9,683 reviews	Search United Airlines flights
Alaska Airlines	PriceFrom $78	Free Cancellation	Rating 7.9 12,330 reviews	Search Alaska Airlines flights
Southwest	PriceFrom $123	Free Cancellation	Rating 7.9 4,304 reviews	Search Southwest flights
JetBlue	PriceFrom $153	Free Cancellation	Rating 7.1 2,977 reviews	Search JetBlue flights
American Airlines	PriceFrom $222	Free Cancellation	Rating 7.1 11,669 reviews	Search American Airlines flights

Why use momondo?

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

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to California from Ontario.

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

Flights from Ontario to California with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

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

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to California from Ontario.

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

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