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Find cheap flights from Ontario to California from $48

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Ontario to California departing on 11/1. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
0 bags
Mon 7/1
Mon 7/8

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Best California Flight Deals

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours

San Francisco
San Franciscononstop$55
San Diego
San Diego1 stop$372
San Jose
San Jose1 stop$108
Palm Springs
Palm Springs1 stop$539
Fresno
Fresno1 stop$262
San Luis Obispo
San Luis Obispo1 stop$342
Bakersfield
Bakersfield1 stop$393
Arcata
Arcata1 stop$304
Redding
Redding1 stop$302
Reno
Reno1 stop$208

Good to know

Low season

January

High season

May

Cheapest flight

$48
Best time to beat the crowds but there is an average 32% increase in price.
Most popular time to fly and prices are also 26% lower on average.
Flight from Ontario to Las Vegas

FAQs - booking California flights

  • How does KAYAK find such low prices on flights from Ontario to California?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Ontario to California.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Ontario to California?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to California from Ontario is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Ontario to California?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to California with an airline and back to Ontario with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Ontario to California?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to California from Ontario up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

Top tips for finding cheap flights to California

  • Looking for a cheap flight? 25% of our users found tickets from Ontario to the following destinations at these prices or less: Las Vegas $26 one-way - $52 round-trip; San Francisco $37 one-way - $71 round-trip; Sacramento $18 one-way - $98 round-trip
  • Morning departure is around 2% cheaper than an evening flight, on average*.
*Average of the lowest prices shown in KAYAK’s search results for departures within the next 30 days

Top 5 airlines serving from Ontario to California

 
Need help choosing which airline to fly with from Ontario to California? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.2
China AirlinesOverall score based on 895 reviews
7.8Food
8.6Crew
8.3Boarding
8.0Entertainment
8.0Comfort
Airline reviews

Comfort was left wanting due to such a long flight, made the wife and I wish we could upgrade the seats to Business class or First Class, but did not have that option. Food was good but had very limited options and I have a dietary restriction which was difficult for the staff to accommodate since everything provided came with cheese on it. (Cheese could potentially kill me) Did not have an option to inform the staff until we were already in the air about the restriction and was not provided another option before flight departed.

8.0 ExcellentMichell, Feb 2024TPE - LAX
Read more about China Airlines reviews

Comfort was left wanting due to such a long flight, made the wife and I wish we could upgrade the seats to Business class or First Class, but did not have that option. Food was good but had very limited options and I have a dietary restriction which was difficult for the staff to accommodate since everything provided came with cheese on it. (Cheese could potentially kill me) Did not have an option to inform the staff until we were already in the air about the restriction and was not provided another option before flight departed.

The plane was uncomfortable. I paid extra for more legroom but the seat was still uncomfortable. Other seats on the same exact row didn’t have to pay extra but still have extra legroom. I didn’t understand why I needed to pay $170 for. It was Iike China airline just wants to make money off their passengers. It was unfair.

They were helpful, considerate with asking us for standby preboarding with our infant, gave us toys and excellent service onboard. They were always on time, even early boarding once! All our luggage arrived intact, and they even brought our baby car seat to oversized for us. We love China Airlines!

It felt like a new plane. Decent leg room in economy, food was fine, and the plane didn’t feel super dry and uncomfortable.

Ask flight attendant for water during flight and she was a little rude get the water.

Baggage made it successfully to destination despite short layover. Appreciate that.

Staff were good and nice. There should me 3 meals instead of only 2 and snacks.

Flight was delay almost 2 hours from Hong Kong to Taipei. Last minute gate change from 24 to 66. Long way walk. We need to run in the Taipei airport to catch our next flight from Taipei to Vancouver. That is so suck!

Excellent staff made the boarding process fast and easy. Friendly crews on both flights from Saigon to Taipei and Taipei to Los Angeles. Will fly China Airlines again.

For a long-haul flight, the crew did a very good job of keeping the lavatories clean and the aisles clear.

Had to change aircraft due to a faulty door. Surprisingly it only caused about an hour and a half of delay. Delta handled this situation as well as can be expected.

Your crew could maybe answer the call bell at least one of the times I pressed it. I pressed it first time with 2.5 hours left in our flight bc my partner was hungry and wanted a sandwich. We finally got the sandwich with 40 mins left in the flight.

The Flight crew didn’t serve us until about 1.5 hours into the flight because of turbulence but after it ended it was fine to move around. They served us water only and snacks and then NEVER, NOT ONE TIME came through to collect trash until right before landing about 1.5 hours later. There was absolutely no need for that. They crew was just standing around talking and visiting with each other and really never tried to see if we might want something besides water or even try to come pick up trash. This is VERY unusual for a Delta flight but it was not what I would have expected for a 4 hour flight.

There was a loud squeaky sound the whole time we were flying.

Had a broken tray in business class. Crew just shrugged it off.

I didn’t like that I could not select my seat and was assigned a seat when I checked in at LAX

Great experience overall. Check in at Austin was congested as they only have about 6 check in kiosks, one was broken, and there was a lot of Spring Break travelers.

Bag drop off was slow and annoying. Only 2 agents at the entire delta desk, and no one directing traffic for what line to be in, many confused people slowed down the process. Boarding was fine. Seats in Delta comfort plus were fine. Snacks were great! Definitely a bonus. The entertainment system was awful — old, slow, not responsive, and completely unable to play games due to some kind of error. But on the other hand, thank you to Delta for the free WiFi. That made it better.

Everything was very good other than I had selected a specific seat when I booked the flight and they changed it once I checked-in the day before my flight. I was still in first class but lost my aisle seat for a window seat. Being tall, the aisle offers more comfort so I always select an aisle seat.

Flight diverted in SD. Later take off in Seattle by 1.3hrs

Dinner was okay but the breakfast was not eatable on the flight San Francisco to Zurich.

Check in etc was very good. As for on the plane, it was like flying in a freezer. It was so cold, i have flown for years and never been so cold on a plane. Staff on board said its always cold when flying which is a load of rubbish. They wouldnt put any heating on and now i have the flu because of this .

I’ve had a couple flights this week on United that were delayed by an hour or more

Should have video screens Plane audio was poor and without wired connection hard to understand crew. Should serve more than just cups of water and pretzels on six hour flight. Did not see crew rest of flight. Fix charging sockets to retain charging blocks.

Generally good but there wasn’t any staff available when my luggage didn’t appear at baggage claim in Fresno. It took about half an hour to locate a staff member to open up the locked room where it was being kept.

Do not like the feeling of being in the basic economy. Everyone should feel good no matter what.

Our original business class flight was cancelled so we not only downgraded but we were also spread out across the plane not sitting together in separate middle seats. My poor kids were scared and couldn’t see me on the flight and the crew wasn’t sensitive to the situation and what the airlines did to us. Very dissatisfied with United airlines.

The WiFi didn’t work and the seats are too close together. Very uncomfortable.

So so. Terrible aircraft choice for that leg of the flight.

delay several times and wait extra long to board. no entertainment service because there are problem for some rows. always encounter some delays for the last flight of the day.

My husband and I pre-ordered our food, but they did not have my husband’s order, and my cheese plate was very average. I asked for a blanket and was told they don’t carry blankets on domestic routs. The flight was on time and smooth!

There were delays on both ends. It made it less than excellent. This plane was great though

Everything was great except for the wifi was junk. Crew was super friendly and helpful

Attendants were rude. Scowling. Seats were miserable and we paid extra.

Fight crew was not very attentive and the bastions were gross!

Our flight was great we left Kona earlier and got into LAX almost an 1hour earlier as well. LAX AA is in repair so to get out and found our bus to get pick up was a bit confusing.

Plane was good but was delayed. probably not AA fault but caused a 1 hour delay. Seating was cramped.

5 hour flight - full flight - not enough room to use my computer - slightly delayed - Admirals club was excellent quality food, drink made up for flight seating. No food offerred on flight, you ahd to prebook.

We experience delays on departure and connecting flights resulting in 14 hour to our next departure. We were accommodated with a night's stay but was only provided a 12 dollar meals accommodation. The airlines rules state.at least 50 dollars. In any case, it can not make up for the whole day missed on our vacation in Sydney Australia.

I can say I will not be taking this airline again any time soon. Seat were uncomfortable and too tight. Lack of chair screen and little overhead space.

Flight was delay 9hrs and nothing was provided at airport, had to go and get a room to sleep in, paid for Uber back and fort with no offers until we landed back home a 1hr later for a $75 voucher for a future flight.

9hrs delay and didn’t provided anything until after flight landed $75 voucher for fiuture travel no meals or anything.

Our flight was delayed an hour, then when we got to board our flight finally, we were waiting in our seats for take off for 45 minutes before it was communicated that there was a maintenance issue therefore we waited on the plane for over an hour while that was resolved. We did not get to Phoenix until almost 3 hours after we were originally supposed to. This was the first and last time I will be flying Frontier.

There were 3 leg for the trip and each leg was delayed by 90 minutes or more. The boarding process takes forever with people waiting on the jetway even though most folks do not have carry-on. The whole process is poorly managed.

They cancelled the flight then did nothing to help us rebook. It was awful - I won’t fly with them again

The process of buying the ticket and navigating all the hidden charges that Frontier throws at you was a terrible experience. The actual airport experience and flying was fine.

The truck that was refueling the plane drove away with the hose still connected to the plane and ripped part of the plane off with it

Terrible. Seats are bad and the baggage policy is inconsistent

Better than I expected but I did pay for a seat and carry on bags ahead of time.

The boarding time. I was in Section 1 the lady in charge just let people in section 3 without see us. Make a line , I have to step out and ask her. We were in the line and she just take my ticket and that’s it, so if I don’t ask her she could leave us at the end! We paid more for that privilege and. She doesn’t care….

Book cheap flights from Ontario to California

Recent round-trip flight deals

7/2Tue
nonstopFrontier
1h 10mONT-LAS
7/4Thu
nonstopFrontier
1h 08mLAS-ONT
$63
7/20Sat
nonstopFrontier
1h 26mONT-SFO
7/22Mon
nonstopFrontier
1h 24mSFO-ONT
$63
7/4Thu
1 stopDelta
6h 45mONT-SMF
7/8Mon
1 stopDelta
4h 59mSMF-ONT
$197
9/6Fri
1 stopAmerican Airlines
5h 38mONT-RNO
9/11Wed
1 stopAmerican Airlines
5h 33mRNO-ONT
$208
8/21Wed
1 stopDelta
5h 08mONT-MFR
8/28Wed
1 stopDelta
6h 09mMFR-ONT
$208
8/7Wed
1 stopUnited Airlines
3h 13mONT-SMF
8/17Sat
1 stopUnited Airlines
3h 23mSMF-ONT
$216
8/11Sun
1 stopUnited Airlines
3h 13mONT-SMF
8/17Sat
1 stopUnited Airlines
3h 23mSMF-ONT
$226
8/13Tue
1 stopAlaska Airlines
7h 35mONT-MFR
8/19Mon
1 stopAlaska Airlines
5h 37mMFR-ONT
$226
9/12Thu
1 stopAmerican Airlines
5h 52mONT-SMF
9/14Sat
1 stopAmerican Airlines
6h 04mSMF-ONT
$227
7/16Tue
1 stopAlaska Airlines
7h 35mONT-MFR
7/26Fri
1 stopAlaska Airlines
5h 37mMFR-ONT
$245

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Recent one-way flight deals

11/1Fri
nonstopFrontier
1h 21mONT-LAS
$48
6/9Sun
nonstopFrontier
1h 27mONT-SFO
$48
10/19Sat
1 stopAmerican Airlines
5h 48mONT-SFO
$79
7/17Wed
1 stopAmerican Airlines
5h 20mONT-LAS
$98
8/13Tue
1 stopDelta
5h 08mONT-MFR
$104
7/4Thu
1 stopUnited Airlines
3h 23mONT-SMF
$108
7/20Sat
1 stopUnited Airlines
3h 13mONT-SMF
$109
6/19Wed
1 stopDelta
6h 26mONT-RNO
$109
9/4Wed
1 stopAlaska Airlines
5h 47mONT-OAK
$141
7/30Tue
1 stopAlaska Airlines
7h 31mONT-OAK
$147

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Last minute flights from Ontario to California

Last minute flight, train and bus deals

6/2Sun
nonstopFrontier
1h 14mONT-LAS
6/6Thu
nonstopFrontier
1h 07mLAS-ONT
$106
6/4Tue
nonstopFrontier
1h 28mONT-SFO
6/6Thu
nonstopFrontier
1h 23mSFO-ONT
$107
6/4Tue
multi-stopUnited Airlines
3h 46mONT-RNO
6/11Tue
multi-stopUnited Airlines
6h 45mRNO-ONT
$278
6/4Tue
multi-stopAmerican Airlines
5h 15mONT-RNO
6/6Thu
multi-stopAmerican Airlines
5h 49mRNO-ONT
$287
6/3Mon
multi-stopDelta
6h 35mONT-RNO
6/18Tue
multi-stopDelta
6h 17mRNO-ONT
$298
6/4Tue
multi-stopDelta
9h 51mONT-RNO
6/11Tue
multi-stopDelta
6h 17mRNO-ONT
$303
6/5Wed
multi-stopAmerican Airlines
5h 56mONT-RNO
6/10Mon
multi-stopAmerican Airlines
5h 08mRNO-ONT
$312
6/1Sat
nonstopUnited Airlines
1h 25mONT-SFO
6/8Sat
nonstopUnited Airlines
1h 32mSFO-ONT
$324
6/4Tue
multi-stopAlaska Airlines
7h 50mONT-MFR
6/11Tue
multi-stopAlaska Airlines
5h 23mMFR-ONT
$659
6/2Sun
multi-stopAlaska Airlines
7h 38mONT-MFR
6/6Thu
multi-stopAlaska Airlines
5h 16mMFR-ONT
$687

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