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

140 flights are operational weekly from Ontario to California as of September 2025. The most popular departure day for this route is Thu, with 20% of flights per week taking off on this day.

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

The number of flights available between Ontario and California is 20 per day as of September 2025. The most frequent departure time is 6:00PM, with 35% of daily flights leaving at noon.

What airlines fly to California?

Frontier, Southwest and United Airlines are the top three most popular airlines that fly to California from Ontario according to our data. Frontier is the first choice among our users, with 37% of people opting to fly with this airline when traveling to California. Keep in mind that there are 9 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 United 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 September 2025, 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 2025/26

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Find the cheapest flights from Ontario to California

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

8:00 am - 9:11 amONT-LAS

1h 11mnonstop

11:27 am - 12:43 pmLAS-ONT

1h 16mnonstop

$59Frontier

Find Deal

Sat, Sep 27 - Sat, Sep 27

8:00 am - 9:11 amONT-LAS

1h 11mnonstop

7:33 pm - 8:42 pmLAS-ONT

1h 09mnonstop

$62Frontier

Find Deal

Wed, Oct 1 - Wed, Oct 8

1:53 pm - 3:11 pmONT-SFO

1h 18mnonstop

9:30 pm - 10:52 pmSFO-ONT

1h 22mnonstop

$77United Airlines

Find Deal

Wed, Oct 8 - Sat, Oct 11

9:15 pm - 10:15 pmONT-LAS

1h 00mnonstop

2:15 pm - 3:20 pmLAS-ONT

1h 05mnonstop

$77Southwest

Find Deal

Sun, Dec 7 - Wed, Dec 10

9:35 pm - 10:40 pmONT-LAS

1h 05mnonstop

7:25 am - 12:55 pmLAS-ONT

5h 30m2 stops

$92Southwest

Find Deal

Fri, Oct 17 - Tue, Oct 21

1:53 pm - 3:11 pmONT-SFO

1h 18mnonstop

9:30 pm - 10:51 pmSFO-ONT

1h 21mnonstop

$117United Airlines

Find Deal

Fri, Sep 26 - Tue, Oct 28

10:09 am - 6:29 pmONT-SJC

8h 20m1 stop

6:00 am - 3:24 pmSJC-ONT

9h 24m1 stop

$203American Airlines

Find Deal

Wed, Oct 22 - Sat, Oct 25

10:09 am - 6:29 pmONT-SJC

8h 20m1 stop

6:00 am - 3:24 pmSJC-ONT

9h 24m1 stop

$223American Airlines

Find Deal

Thu, Oct 30 - Sat, Nov 1

6:00 am - 1:55 pmONT-MFR

7h 55m1 stop

2:35 pm - 8:53 pmMFR-ONT

6h 18m1 stop

$249Alaska Airlines

Find Deal

Wed, Oct 29 - Sat, Nov 1

6:00 am - 11:16 amONT-MFR

5h 16m1 stop

12:40 pm - 4:53 pmMFR-ONT

4h 13m1 stop

$258Alaska Airlines

Find Deal

Wed, Oct 15 - Wed, Oct 22

United Airlines flights from Ontario to California

Our best United Airlines deals on Ontario to California flight tickets

United Airlines

Oct 8

ONT1:53 pmOntario

1h 18m

SFO3:11 pmSan Francisco

Oct 11

SFO9:30 pmSan Francisco

1h 22m

ONT10:52 pmOntario

$77

Find similar

United Airlines

Sep 26

ONT1:53 pmOntario

1h 18m

SFO3:11 pmSan Francisco

Oct 28

SFO9:30 pmSan Francisco

1h 21m

ONT10:51 pmOntario

$117

Find similar

United Airlines

Nov 27

ONT1:40 pmOntario

1h 24m

SFO3:04 pmSan Francisco

Jan 2

SFO4:20 pmSan Francisco

1h 23m

ONT5:43 pmOntario

$120

Find similar

Frontier flights from Ontario to California

Our best Frontier deals on Ontario to California flight tickets

Frontier

Sep 27

ONT8:00 amOntario

1h 11m

LAS9:11 amLas Vegas Harry Reid Intl

Sep 27

LAS11:27 amLas Vegas Harry Reid Intl

1h 16m

ONT12:43 pmOntario

$59

Find similar

Frontier

Oct 1

ONT8:00 amOntario

1h 11m

LAS9:11 amLas Vegas Harry Reid Intl

Oct 8

LAS7:33 pmLas Vegas Harry Reid Intl

1h 09m

ONT8:42 pmOntario

$62

Find similar

Frontier

Sep 29

ONT10:28 pmOntario

1h 16m

LAS11:44 pmLas Vegas Harry Reid Intl

Oct 6

LAS6:10 amLas Vegas Harry Reid Intl

1h 07m

ONT7:17 amOntario

$63

Find similar

Fly from

Fly to

Route

Depart

Return

Price

OntarioLas Vegas

ONT - LAS

ONTLAS

Ontario

Sat 9/27

8:00 am-9:11 am

Nonstop1h 11m

Las Vegas Harry Reid Intl

Sat 9/27

11:27 am-12:43 pm

Nonstop1h 16m

$59

OntarioLas Vegas

ONT - LAS

ONTLAS

Ontario

Wed 10/1

8:00 am-9:11 am

Nonstop1h 11m

Las Vegas Harry Reid Intl

Wed 10/8

7:33 pm-8:42 pm

Nonstop1h 09m

$62

OntarioSan Francisco

ONT - SFO

ONTSFO

Ontario

Wed 10/8

1:53 pm-3:11 pm

Nonstop1h 18m

San Francisco

Sat 10/11

9:30 pm-10:52 pm

Nonstop1h 22m

$77

OntarioLas Vegas

ONT - LAS

ONTLAS

Ontario

Sun 12/7

9:15 pm-10:15 pm

Nonstop1h 00m

Las Vegas Harry Reid Intl

Wed 12/10

2:15 pm-3:20 pm

Nonstop1h 05m

$77

OntarioLas Vegas

ONT - LAS

ONTLAS

Ontario

Fri 10/17

9:35 pm-10:40 pm

Nonstop1h 05m

Las Vegas Harry Reid Intl

Tue 10/21

7:25 am-12:55 pm

2 stops5h 30m

$92

OntarioSan Francisco

ONT - SFO

ONTSFO

Ontario

Fri 9/26

1:53 pm-3:11 pm

Nonstop1h 18m

San Francisco

Tue 10/28

9:30 pm-10:51 pm

Nonstop1h 21m

$117

OntarioSan Jose

ONT - SJC

ONTSJC

Ontario

Wed 10/22

10:09 am-6:29 pm

1 stop8h 20m

San Jose

Sat 10/25

6:00 am-3:24 pm

1 stop9h 24m

$203

OntarioSan Jose

ONT - SJC

ONTSJC

Ontario

Thu 10/30

10:09 am-6:29 pm

1 stop8h 20m

San Jose

Sat 11/1

6:00 am-3:24 pm

1 stop9h 24m

$223

OntarioMedford

ONT - MFR

ONTMFR

Ontario

Wed 10/29

6:00 am-1:55 pm

1 stop7h 55m

Medford

Sat 11/1

2:35 pm-8:53 pm

1 stop6h 18m

$249

OntarioMedford

ONT - MFR

ONTMFR

Ontario

Wed 10/15

6:00 am-11:16 am

1 stop5h 16m

Medford

Wed 10/22

12:40 pm-4:53 pm

1 stop4h 13m

$258

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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 Oakland 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	$69
Fastest flight time	1h 05m
Direct flights	Every day
Airports in California	1 airport

The best one-way flight to California from Ontario in the past 72 hours is $69. The best round-trip flight deal from Ontario to California found on momondo in the last 72 hours is $129.

The fastest flight from Ontario to California takes 1h 05m

Direct flights go from Ontario to California every day.

There is 1 airport near California: 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 September 2025, 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 737-800, making up 13.17% of the total bookings. Other popular models include Boeing 737 MAX 8 with 12.55%, Embraer 175 with 10.69%, and Airbus A320neo with 10.35%.

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
Spirit Airlines	PriceFrom $31	Free Cancellation	Rating 6.3 8,019 reviews	Search Spirit Airlines flights
Frontier	PriceFrom $36	Free Cancellation	Rating 5.8 3,174 reviews	Search Frontier flights
United Airlines	PriceFrom $58	Free Cancellation	Rating 7.4 8,924 reviews	Search United Airlines flights
Alaska Airlines	PriceFrom $67	Free Cancellation	Rating 8.0 10,000 reviews	Search Alaska Airlines flights
Delta	PriceFrom $97	Free Cancellation	Rating 7.9 7,957 reviews	Search Delta flights
Southwest	PriceFrom $101	Free Cancellation	Rating 8.0 4,242 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.

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Find better results for your trip to California

Popular cities in California

Flights to New Yorkfrom $49

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Flights to Orlandofrom $59

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Flights to Dallasfrom $68

Flights to Seattlefrom $69

Cheap flights from Ontario to California from $29

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Ontario to California departing on 10/20. 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 Ontario to California

Cheap round-trip flights

Cheap one-way flights

Cheap last minute flights

Cheap direct flights

United Airlines flights from Ontario to California

Our best United Airlines deals on Ontario to California flight tickets

Frontier flights from Ontario to California

Our best Frontier deals on Ontario to California flight tickets

momondo Fare Finder

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

See travel insights to California from

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

What is the cheapest Ontario to California flight route?

Fly from Ontario to Oakland 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.

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

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

What airlines fly to California?

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

The number of flights available between Ontario and California is 20 per day as of September 2025. The most frequent departure time is 6:00PM, with 35% of daily flights leaving at noon.

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

140 flights are operational weekly from Ontario to California as of September 2025. The most popular departure day for this route is Thu, with 20% of flights per week taking off on this day.

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

Fastest flight time

Direct flights

Airports in California

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

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

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

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

What is the most popular plane model from Ontario to California?

Best airlines flying from Ontario to California

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

Why use momondo?

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

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

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

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

An easier way to manage your California 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 California

Popular cities in California

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