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Find cheap flights from Ontario to California from $65

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 5/2. 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
Tue 5/28
Tue 6/4

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Best California Flight Deals

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

Los Angeles
Los Angeles1 stop$122
San Francisco
San Franciscononstop$48
San Diego
San Diego1 stop$329
San Jose
San Jose1 stop$258
Fresno
Fresno1 stop$313
San Luis Obispo
San Luis Obispo1 stop$278
Bakersfield
Bakersfield1 stop$451
Arcata
Arcata1 stop$427
Redding
Redding1 stop$324
Reno
Reno1 stop$217

Good to know

Low season

January

High season

October

Cheapest flight

$65
Best time to beat the crowds with an average 42% drop in price.
Most popular time to fly and prices are also 17% lower on average.
Flight from Ontario to San Francisco

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: Reno $54 one-way - $107 round-trip; San Francisco $39 one-way - $71 round-trip
  • Morning departure is around 1% more expensive 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 958 reviews
8.0comfort
7.8food
8.6crew
8.1entertainment
8.3boarding
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!

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.

The check-in crew at SF did not put on breakable glass stickers on check-in baggages which caused my antique whisky bottle to break during transportation.

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

Crew was not friendly when I went to request a seat change.

Really impressive staff at airport and on plane, especially given how busy it was

Was a great smooth flight from Detroit to San Diego.

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.

On time every leg of the journey and exceptional staff at counter, gate, and on board. I haven’t travelled in US for a long time and was genuinely surprised how pleasant this was.

This was a Lufthansa flight. Disappointing main meal. Very rough over Canada and arrival at FRA. IFE was almost unusable.

Too many fees (but that seems to apply to all airlines nowadays)

For a 22 minute flight all you expect is for it to be safe and comfortable

I was not able to buy food in the flight. They refer to include your Credit card in the APP, and if you are not from USA (i have a credit card form Canada) it is not possible

Over two hours wait to get wheelchair assistance from arrival to the departure gate for LA was unreasonable even though there appreared to be heavy demand.

Airline did not explain reasons why flight was delayed two hours. Explanations were badly needed and rarely provided. Problem seemed to clearly be the airline’s fault and not the fault of the weather or airport.

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.

Plane felt so crowded and tightly packed. The chair itself was not comfortable.

It was wonderful upgrading to first. Plane was so cold thou. Crew was great. Wish there was a food option in first for such a long flight. Doesnt matter the time of day. Chintzy.

They attended to my needs as I couldn't walk and they provided a wheelchair for me.q

Poor availability of food. Cold cabin temperature. Extremely long waiting time for a flight attendant to respond to a call button signal.

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….

I hope to avoid flying with them in the future. First flight got cancelled then got stuck with a 13 hour layover in Denver. The process was long and frustrating to many people.

Flight was delayed on the runway for 40 minutes the crew did not even offer even water to passengers to compensate for the flight delayed. The flight was delayed due to aircraft mechanical issues. Worst customer service ever

See my previous comment which is mostly about our flight from Phoenix to SFO

Book cheap flights from Ontario to California

Recent round-trip flight deals

6/27Thu
nonstopFrontier
1h 28mONT-SFO
6/30Sun
nonstopFrontier
1h 24mSFO-ONT
$82
7/6Sat
nonstopFrontier
1h 26mONT-SFO
7/8Mon
nonstopFrontier
1h 21mSFO-ONT
$83
7/18Thu
nonstopUnited Airlines
1h 20mONT-SFO
7/20Sat
nonstopUnited Airlines
1h 30mSFO-ONT
$214
6/12Wed
1 stopDelta
6h 48mONT-SMF
6/15Sat
1 stopDelta
6h 47mSMF-ONT
$214
5/29Wed
1 stopDelta
6h 35mONT-RNO
5/31Fri
1 stopDelta
6h 09mRNO-ONT
$217
5/10Fri
1 stopAmerican Airlines
5h 15mONT-RNO
5/15Wed
1 stopAmerican Airlines
6h 08mRNO-ONT
$218
5/25Sat
1 stopAmerican Airlines
5h 36mONT-RNO
6/1Sat
1 stopAmerican Airlines
5h 55mRNO-ONT
$233
5/17Fri
nonstopUnited Airlines
1h 28mONT-SFO
5/20Mon
nonstopUnited Airlines
1h 34mSFO-ONT
$234
6/3Mon
1 stopAlaska Airlines
15h 31mONT-SJC
6/4Tue
1 stopAlaska Airlines
8h 17mSJC-ONT
$345
5/22Wed
1 stopAlaska Airlines
15h 31mONT-SJC
5/29Wed
2 stopsAlaska Airlines
17h 43mSJC-ONT
$350

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Recent one-way flight deals

5/2Thu
nonstopFrontier
1h 27mONT-SFO
$65
7/22Mon
nonstopFrontier
1h 23mONT-SMF
$69
5/21Tue
1 stopDelta
6h 47mONT-RNO
$98
8/28Wed
1 stopAmerican Airlines
5h 46mONT-SMF
$107
9/14Sat
1 stopAmerican Airlines
6h 21mONT-SFO
$107
5/30Thu
1 stopDelta
6h 35mONT-RNO
$109
5/20Mon
1 stopUnited Airlines
3h 22mONT-SMF
$119
5/19Sun
1 stopUnited Airlines
3h 22mONT-SMF
$137
5/21Tue
1 stopAlaska Airlines
13h 51mONT-OAK
$157
5/21Tue
1 stopAlaska Airlines
5h 40mONT-SJC
$159

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Last minute flights from Ontario to California

Last minute flight, train and bus deals

5/2Thu
nonstopFrontier
1h 27mONT-SFO
5/9Thu
nonstopFrontier
1h 29mSFO-ONT
$99
5/2Thu
nonstopFrontier
1h 27mONT-SFO
5/5Sun
nonstopFrontier
1h 29mSFO-ONT
$109
4/30Tue
multi-stopDelta
6h 45mONT-RNO
5/3Fri
multi-stopDelta
6h 24mRNO-ONT
$218
4/30Tue
multi-stopDelta
9h 49mONT-RNO
5/3Fri
multi-stopDelta
6h 24mRNO-ONT
$223
5/3Fri
multi-stopAmerican Airlines
5h 36mONT-RNO
5/4Sat
multi-stopAmerican Airlines
5h 26mRNO-ONT
$243
5/2Thu
multi-stopAmerican Airlines
5h 54mONT-RNO
5/5Sun
multi-stopAmerican Airlines
5h 26mRNO-ONT
$257
4/30Tue
multi-stopUnited Airlines
3h 58mONT-RNO
5/2Thu
multi-stopUnited Airlines
4h 23mRNO-ONT
$278
5/3Fri
multi-stopUnited Airlines
6h 20mONT-MRY
5/5Sun
multi-stopUnited Airlines
4h 01mMRY-ONT
$294
5/3Fri
multi-stopAlaska Airlines
17h 58mONT-OAK
5/6Mon
multi-stopAlaska Airlines
17h 59mOAK-ONT
$708
5/3Fri
multi-stopAlaska Airlines
7h 17mONT-OAK
5/6Mon
multi-stopAlaska Airlines
15h 53mOAK-ONT
$713

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