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

82 flights are operational weekly from Ontario to California as of November 2026. The most popular departure day for this route is Mon, with 30% 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 11 per day as of November 2026. The most frequent departure time is 6:00AM, with 50% of daily flights leaving at noon.

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

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

What airlines fly to California?

Southwest, Frontier and United Airlines 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 34% 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 November 2026, there are 5 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.

$21 Cheap Flights from Ontario to California in 2026/27

Discover deals from 900+ travel sites with momondo.

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.

1:37 pm - 2:57 pmONT Ontario-OAK Oakland

1h 20mnonstop

8:35 pm - 9:52 pmOAK Oakland-ONT Ontario

1h 17mnonstop

$45Frontier

Sat, Nov 21 - Thu, Nov 26

12:24 pm - 1:44 pmONT Ontario-OAK Oakland

1h 20mnonstop

12:28 pm - 12:39 pmOAK Oakland-ONT Ontario

24h 11m1 stop Las Vegas Harry Reid Intl

$78Frontier

Tue, Nov 24 - Tue, Dec 1

6:00 am - 7:30 amONT Ontario-SFO San Francisco

1h 30mnonstop

2:02 pm - 3:35 pmSFO San Francisco-ONT Ontario

1h 33mnonstop

$117United Airlines

Fri, Nov 27 - Tue, Dec 1

12:30 pm - 2:00 pmONT Ontario-SFO San Francisco

1h 30mnonstop

6:50 pm - 8:15 pmSFO San Francisco-ONT Ontario

1h 25mnonstop

$117United Airlines

Thu, Nov 26 - Fri, Nov 27

10:25 am - 11:40 amONT Ontario-SJC San Jose

1h 15mnonstop

4:35 pm - 5:50 pmSJC San Jose-ONT Ontario

1h 15mnonstop

$117Southwest

Thu, Dec 3 - Mon, Dec 7

5:55 am - 7:10 amONT Ontario-SJC San Jose

1h 15mnonstop

7:40 pm - 9:05 pmSJC San Jose-ONT Ontario

1h 25mnonstop

$117Southwest

Fri, Nov 27 - Fri, Dec 4

8:44 am - 1:51 pmONT Ontario-SFO San Francisco

5h 07m1 stop Las Vegas Harry Reid Intl

9:56 pm - 11:23 pmSFO San Francisco-ONT Ontario

1h 27mnonstop

$161Multiple Airlines

Sat, Dec 5 - Thu, Dec 10

7:06 pm - 2:34 pmONT Ontario-FAT Fresno Airterminal

43h 28m2 stops San Francisco Las Vegas Harry Reid Intl

12:16 pm - 11:51 amFAT Fresno Airterminal-ONT Ontario

23h 35m1 stop Las Vegas Harry Reid Intl

$171Multiple Airlines

Tue, Dec 1 - Tue, Dec 8

6:01 pm - 12:57 pmONT Ontario-SFO San Francisco

18h 56m1 stop Portland

9:41 pm - 4:56 pmSFO San Francisco-ONT Ontario

19h 15m2 stops Portland Boise Air Term. Gowen Fld

$368Alaska Airlines

Wed, Dec 2 - Mon, Dec 7

10:50 am - 7:37 pmONT Ontario-SFO San Francisco

8h 47m1 stop Portland

9:41 pm - 4:56 pmSFO San Francisco-ONT Ontario

19h 15m2 stops Portland Boise Air Term. Gowen Fld

$368Alaska Airlines

Sat, Dec 5 - Mon, Dec 7

Cheap last minute flights

Enter your travel dates to find the best prices.

12:01 pm - 1:36 pmONT Ontario-SFO San Francisco

1h 35mnonstop

6:04 pm - 7:30 pmSFO San Francisco-ONT Ontario

1h 26mnonstop

$120Frontier

Mon, Nov 9 - Thu, Nov 12

12:01 pm - 1:36 pmONT Ontario-SFO San Francisco

1h 35mnonstop

6:04 pm - 7:30 pmSFO San Francisco-ONT Ontario

1h 26mnonstop

$129Frontier

Thu, Nov 5 - Mon, Nov 9

6:00 am - 7:30 amONT Ontario-SFO San Francisco

1h 30mnonstop

4:35 pm - 6:01 pmSFO San Francisco-ONT Ontario

1h 26mnonstop

$279United Airlines

Sat, Nov 7 - Sat, Nov 14

5:35 am - 12:10 pmONT Ontario-SFO San Francisco

6h 35m2 stops Phoenix Sky Harbor Intl Las Vegas Harry Reid Intl

5:50 am - 11:20 amSFO San Francisco-ONT Ontario

5h 30m1 stop Phoenix Sky Harbor Intl

$304Southwest

Sat, Nov 7 - Sat, Nov 14

6:37 pm - 8:10 pmONT Ontario-SFO San Francisco

1h 33mnonstop

6:50 pm - 8:15 pmSFO San Francisco-ONT Ontario

1h 25mnonstop

$339United Airlines

Mon, Nov 9 - Tue, Nov 10

8:35 pm - 10:19 amONT Ontario-FAT Fresno Airterminal

13h 44m1 stop Las Vegas Harry Reid Intl

9:08 pm - 4:21 pmFAT Fresno Airterminal-ONT Ontario

19h 13m1 stop Las Vegas Harry Reid Intl

$352Multiple Airlines

Fri, Nov 6 - Sun, Nov 8

1:05 pm - 5:15 pmONT Ontario-SFO San Francisco

4h 10m1 stop Phoenix Sky Harbor Intl

5:30 pm - 10:00 pmSFO San Francisco-ONT Ontario

4h 30m1 stop Las Vegas Harry Reid Intl

$359Southwest

Sat, Nov 7 - Mon, Nov 9

8:35 pm - 10:19 amONT Ontario-FAT Fresno Airterminal

13h 44m1 stop Las Vegas Harry Reid Intl

9:08 pm - 7:30 pmFAT Fresno Airterminal-ONT Ontario

22h 22m2 stops Las Vegas Harry Reid Intl Oakland

$360Multiple Airlines

Fri, Nov 6 - Sun, Nov 8

5:59 pm - 4:44 pmONT Ontario-SFO San Francisco

22h 45m1 stop Portland

6:47 pm - 3:24 pmSFO San Francisco-ONT Ontario

20h 37m1 stop Boise Air Term. Gowen Fld

$961Alaska Airlines

Thu, Nov 5 - Fri, Nov 6

10:40 am - 4:44 pmONT Ontario-SFO San Francisco

6h 04m1 stop Portland

6:47 pm - 3:24 pmSFO San Francisco-ONT Ontario

20h 37m1 stop Boise Air Term. Gowen Fld

$962Alaska Airlines

Fri, Nov 6 - Fri, Nov 6

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

Frontier flights from Ontario to California

Our best Frontier deals on Ontario to California flight tickets

Frontier

Nov 21

ONT1:37 pmOntario

1h 20m

OAK2:57 pmOakland

Nov 26

OAK8:35 pmOakland

1h 17m

ONT9:52 pmOntario

$45

Frontier

Nov 24

ONT12:24 pmOntario

1h 20m

OAK1:44 pmOakland

Dec 1

OAK12:28 pmOakland

24h 11m

1 stop

ONT12:39 pmOntario

$78

Frontier

Nov 21

ONT1:37 pmOntario

1h 20m

OAK2:57 pmOakland

Nov 26

OAK11:24 amOakland

8h 12m

1 stop

ONT7:36 pmOntario

$87

United Airlines flights from Ontario to California

Our best United Airlines deals on Ontario to California flight tickets

United Airlines

Nov 25

ONT6:00 amOntario

1h 30m

SFO7:30 amSan Francisco

Nov 27

SFO9:20 pmSan Francisco

1h 28m

ONT10:48 pmOntario

$117

United Airlines

Dec 11

ONT6:00 amOntario

3h 26m

1 stop

SMF9:26 amSacramento Intl

Dec 11

SMF2:15 pmSacramento Intl

6h 23m

1 stop

ONT8:38 pmOntario

$207

United Airlines

Dec 1

ONT6:00 amOntario

5h 23m

1 stop

FAT11:23 amFresno Airterminal

Dec 8

FAT12:00 pmFresno Airterminal

3h 35m

1 stop

ONT3:35 pmOntario

$295

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OntarioOakland

ONT Ontario - OAK Oakland

ONTOAK

Ontario

Sat 11/21

1:37 pm-2:57 pm

Nonstop1h 20m

Oakland

Thu 11/26

8:35 pm-9:52 pm

Nonstop1h 17m

$45

OntarioOakland

ONT Ontario - OAK Oakland

ONTOAK

Ontario

Tue 11/24

12:24 pm-1:44 pm

Nonstop1h 20m

Oakland

Tue 12/1

12:28 pm-12:39 pm

1 stop24h 11m

$78

OntarioSan Francisco

ONT Ontario - SFO San Francisco

ONTSFO

Ontario

Fri 11/27

6:00 am-7:30 am

Nonstop1h 30m

San Francisco

Tue 12/1

2:02 pm-3:35 pm

Nonstop1h 33m

$117

OntarioSan Francisco

ONT Ontario - SFO San Francisco

ONTSFO

Ontario

Thu 11/26

12:30 pm-2:00 pm

Nonstop1h 30m

San Francisco

Fri 11/27

6:50 pm-8:15 pm

Nonstop1h 25m

$117

Quickest round-trip

OntarioSan Jose

ONT Ontario - SJC San Jose

ONTSJC

Ontario

Thu 12/3

10:25 am-11:40 am

Nonstop1h 15m

San Jose

Mon 12/7

4:35 pm-5:50 pm

Nonstop1h 15m

$117

OntarioSan Jose

ONT Ontario - SJC San Jose

ONTSJC

Ontario

Fri 11/27

5:55 am-7:10 am

Nonstop1h 15m

San Jose

Fri 12/4

7:40 pm-9:05 pm

Nonstop1h 25m

$117

OntarioSan Francisco

ONT Ontario - SFO San Francisco

ONTSFO

Ontario

Sat 12/5

8:44 am-1:51 pm

1 stop5h 07m

San Francisco

Thu 12/10

9:56 pm-11:23 pm

Nonstop1h 27m

$161

OntarioFresno

ONT Ontario - FAT Fresno Airterminal

ONTFAT

Ontario

Tue 12/1

7:06 pm-2:34 pm

2 stops43h 28m

Fresno Airterminal

Tue 12/8

12:16 pm-11:51 am

1 stop23h 35m

$171

OntarioSan Francisco

ONT Ontario - SFO San Francisco

ONTSFO

Ontario

Wed 12/2

6:01 pm-12:57 pm

1 stop18h 56m

San Francisco

Mon 12/7

9:41 pm-4:56 pm

2 stops19h 15m

$368

OntarioSan Francisco

ONT Ontario - SFO San Francisco

ONTSFO

Ontario

Sat 12/5

10:50 am-7:37 pm

1 stop8h 47m

San Francisco

Mon 12/7

9:41 pm-4:56 pm

2 stops19h 15m

$368

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 December is another great option to travel to California, with average flight prices from Ontario averaging around $233.

What is the cheapest Ontario to California flight route?

Fly from Ontario to San Francisco 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	$21
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 $21. The best round-trip flight deal from Ontario to California found on momondo in the last 72 hours is $45.

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 Oakland (OAK), San Jose (SJC).

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 November 2026, there are 5 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 Passenger/BBJ2 (winglets), making up 13.60% of the total bookings. Other popular models include Boeing 737 MAX 9 with 12.06%, Airbus A320neo with 11.06%, and Airbus A321neo with 10.21%.

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 5.5 2,512 reviews	Search Frontier flights
Alaska Airlines	PriceFrom $91	Free Cancellation	Rating 7.9 13,136 reviews	Search Alaska Airlines flights
United Airlines	PriceFrom $117	Free Cancellation	Rating 7.3 10,458 reviews	Search United Airlines flights
Southwest	PriceFrom $117	Free Cancellation	Rating 8.0 4,215 reviews	Search Southwest flights
JetBlue	PriceFrom $120	Free Cancellation	Rating 7.1 3,064 reviews	Search JetBlue 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.