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

The number of flights available between Ontario and California is 23 per day as of March 2026. The most frequent departure time is 6:00AM, with 42% of daily flights leaving at noon.

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

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

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

161 flights are operational weekly from Ontario to California as of March 2026. The most popular departure day for this route is Fri, with 20% 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 30% of people opting to fly with this airline when traveling to California. Keep in mind that there are 10 different airlines that fly to California on a routine basis, so you have a few additional options to choose from.

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 March 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.

$29 Cheap Flights from Ontario to California in 2026

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Find the cheapest flights from Ontario to California

Round-trip

One-way

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Cheap round-trip flights

Enter your travel dates to find the best prices.

1:09 pm - 2:19 pm

ONT

LAS

1h 10mnonstop

5:41 pm - 6:49 pm

LAS

ONT

1h 08mnonstop

$60Frontier

Tue, Apr 7 - Wed, Apr 15

1:09 pm - 2:19 pm

ONT

LAS

1h 10mnonstop

9:30 am - 10:44 am

LAS

ONT

1h 14mnonstop

$61Frontier

Tue, Apr 7 - Tue, Apr 14

11:05 am - 12:34 pm

ONT

SFO

1h 29mnonstop

10:50 am - 12:20 pm

SFO

ONT

1h 30mnonstop

$117United Airlines

Wed, Apr 15 - Wed, Apr 22

12:30 pm - 1:45 pm

ONT

SJC

1h 15mnonstop

7:15 am - 8:30 am

SJC

ONT

1h 15mnonstop

$117Southwest

Wed, Apr 15 - Wed, Apr 22

12:48 pm - 2:20 pm

ONT

STS

1h 32mnonstop

5:44 pm - 7:08 pm

STS

ONT

1h 24mnonstop

$117Alaska Airlines

Wed, May 6 - Wed, May 13

7:30 pm - 8:45 pm

ONT

SJC

1h 15mnonstop

6:15 am - 11:35 am

SJC

ONT

5h 20m

1 stop

$127Southwest

Wed, Apr 15 - Wed, Apr 22

12:48 pm - 2:20 pm

ONT

STS

1h 32mnonstop

10:41 am - 12:08 pm

STS

ONT

1h 27mnonstop

$137Alaska Airlines

Wed, Apr 22 - Sat, May 2

12:38 pm - 7:37 pm

ONT

RNO

6h 59m

1 stop

10:15 pm - 10:44 am

RNO

ONT

12h 29m

1 stop

$164Multiple Airlines

Sat, Apr 11 - Mon, Apr 13

9:26 pm - 3:00 pm

ONT

RNO

17h 34m

1 stop

11:35 am - 5:15 pm

RNO

ONT

5h 40m

1 stop

$169Multiple Airlines

Tue, Apr 7 - Thu, Apr 9

1:27 pm - 6:00 pm

ONT

MRY

4h 33m

1 stop

7:00 pm - 10:45 pm

MRY

ONT

3h 45m

1 stop

$299United Airlines

Fri, Apr 17 - Mon, Apr 20

United Airlines flights from Ontario to California

Our best United Airlines deals on Ontario to California flight tickets

United Airlines

Apr 15

ONT11:05 amOntario

1h 29m

SFO12:34 pmSan Francisco

Apr 22

SFO10:50 amSan Francisco

1h 30m

ONT12:20 pmOntario

$117

United Airlines

Apr 21

ONT6:00 amOntario

1h 29m

SFO7:29 amSan Francisco

Apr 23

SFO8:25 amSan Francisco

1h 31m

ONT9:56 amOntario

$147

United Airlines

Apr 21

ONT11:05 amOntario

1h 30m

SFO12:35 pmSan Francisco

Apr 29

SFO10:50 amSan Francisco

1h 30m

ONT12:20 pmOntario

$177

Southwest flights from Ontario to California

Our best Southwest deals on Ontario to California flight tickets

Southwest

Apr 15

ONT12:30 pmOntario

1h 15m

SJC1:45 pmSan Jose

Apr 22

SJC7:15 amSan Jose

1h 15m

ONT8:30 amOntario

$117

Southwest

Apr 15

ONT7:30 pmOntario

1h 15m

SJC8:45 pmSan Jose

Apr 22

SJC6:15 amSan Jose

5h 20m

1 stop

ONT11:35 amOntario

$127

Southwest

Apr 15

ONT5:45 amOntario

1h 15m

SJC7:00 amSan Jose

Apr 22

SJC3:15 pmSan Jose

6h 55m

2 stops

ONT10:10 pmOntario

$132

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Quickest round-trip

OntarioLas Vegas

ONT - LAS

ONTLAS

Ontario

Tue 4/7

1:09 pm-2:19 pm

Nonstop1h 10m

Las Vegas Harry Reid Intl

Wed 4/15

5:41 pm-6:49 pm

Nonstop1h 08m

$60

OntarioLas Vegas

ONT - LAS

ONTLAS

Ontario

Tue 4/7

1:09 pm-2:19 pm

Nonstop1h 10m

Las Vegas Harry Reid Intl

Tue 4/14

9:30 am-10:44 am

Nonstop1h 14m

$61

OntarioSan Francisco

ONT - SFO

ONTSFO

Ontario

Wed 4/15

11:05 am-12:34 pm

Nonstop1h 29m

San Francisco

Wed 4/22

10:50 am-12:20 pm

Nonstop1h 30m

$117

OntarioSan Jose

ONT - SJC

ONTSJC

Ontario

Wed 4/15

12:30 pm-1:45 pm

Nonstop1h 15m

San Jose

Wed 4/22

7:15 am-8:30 am

Nonstop1h 15m

$117

OntarioSanta Rosa

ONT - STS

ONTSTS

Ontario

Wed 5/6

12:48 pm-2:20 pm

Nonstop1h 32m

Santa Rosa Sonoma County

Wed 5/13

5:44 pm-7:08 pm

Nonstop1h 24m

$117

OntarioSan Jose

ONT - SJC

ONTSJC

Ontario

Wed 4/15

7:30 pm-8:45 pm

Nonstop1h 15m

San Jose

Wed 4/22

6:15 am-11:35 am

1 stop5h 20m

$127

OntarioSanta Rosa

ONT - STS

ONTSTS

Ontario

Wed 4/22

12:48 pm-2:20 pm

Nonstop1h 32m

Santa Rosa Sonoma County

Sat 5/2

10:41 am-12:08 pm

Nonstop1h 27m

$137

OntarioReno

ONT - RNO

ONTRNO

Ontario

Sat 4/11

12:38 pm-7:37 pm

1 stop6h 59m

Reno

Mon 4/13

10:15 pm-10:44 am

1 stop12h 29m

$164

OntarioReno

ONT - RNO

ONTRNO

Ontario

Tue 4/7

9:26 pm-3:00 pm

1 stop17h 34m

Reno

Thu 4/9

11:35 am-5:15 pm

1 stop5h 40m

$169

OntarioMonterey

ONT - MRY

ONTMRY

Ontario

Fri 4/17

1:27 pm-6:00 pm

1 stop4h 33m

Monterey Regional

Mon 4/20

7:00 pm-10:45 pm

1 stop3h 45m

$299

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 Ontario to California flight route?

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

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

There are 4 cabin classes available to choose from on Ontario to California 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 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	$78
Fastest flight time	1h 05m
Direct flights	Every day
Airports in California	418 airports

The best one-way flight to California from Ontario in the past 72 hours is $78. 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 05m

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

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 March 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 15.54% of the total bookings. Other popular models include Boeing 737-800 Passenger/BBJ2 (winglets) with 11.51%, Boeing 737 MAX 9 with 11.45%, and Airbus A319 with 6.72%.

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 $34	Free Cancellation	Rating 5.7 3,018 reviews	Search Frontier flights
United Airlines	PriceFrom $60	Free Cancellation	Rating 7.4 9,453 reviews	Search United Airlines flights
Alaska Airlines	PriceFrom $78	Free Cancellation	Rating 7.9 12,092 reviews	Search Alaska Airlines flights
Southwest	PriceFrom $97	Free Cancellation	Rating 8.0 4,325 reviews	Search Southwest 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.