SJC - ONT

$69 Find Cheap Flights from San Jose to Ontario

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from San Jose to Ontario departing on 6/30. 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
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Ontario

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from San Jose to Ontario, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from San Jose to Ontario, as well as popular online travel agencies
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Everything you should know

Cheapest round-trip
$137
Typical prices: $331-$198
Southwest
Tue 6/23Tue 6/30
SJC - ONT • Non-stop
Cheapest non-stop
$137
Typical prices: $379-$248
Southwest
Tue 7/7Tue 7/14
SJC - ONT • Non-stop
Advice from real travelers
AI-powered summary based on content written by travel experts. AI can make mistakes.
SJC's manageable layout suits tech business travelers.
Use Omnitrans Bus Route 61 for a budget-friendly arrival.
Expert advice
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Top airlines
Cheapest • from $137 (round-trip)
Best reviews • 8.0 score
Airline reviews
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Nonstop flights
You can fly direct with Southwest. Average duration is 1h 17m
Direct flights
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Direct flights
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When to book
in advance
Our data shows that travelers who book at least 3 weeks in advance save around 53% compared to booking last minute.
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When to travel
Cheapest • 14% price drop
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Flight Deals

Cheap Flights from San Jose to Ontario (SJC-ONT)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from San Jose to Ontario that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from San Jose to Ontario

Tue, Jun 23 - Tue, Jun 30
Southwest Logo
8:55 pm - 10:10 pm
SJC
-
ONT
1h 15mnonstop
Southwest Logo
5:45 pm - 7:00 pm
ONT
-
SJC
1h 15mnonstop
$137Southwest
Tue, Jun 23 - Tue, Jun 30
Southwest Logo
7:45 am - 11:30 am
SJC
-
ONT
3h 45m
1 stop
Southwest Logo
5:45 pm - 7:00 pm
ONT
-
SJC
1h 15mnonstop
$147Southwest
Wed, Jun 24 - Wed, Jul 1
Southwest Logo
6:30 am - 7:50 am
SJC
-
ONT
1h 20mnonstop
Southwest Logo
5:15 am - 10:45 am
ONT
-
SJC
5h 30m
2 stops
$152Southwest
Tue, Jun 23 - Tue, Jun 30
Southwest Logo
7:45 am - 11:30 am
SJC
-
ONT
3h 45m
1 stop
Southwest Logo
7:20 pm - 11:25 pm
ONT
-
SJC
4h 05m
1 stop
$157Southwest
Wed, Jun 24 - Wed, Jul 1
Southwest Logo
10:20 am - 2:05 pm
SJC
-
ONT
3h 45m
1 stop
Southwest Logo
5:15 am - 10:45 am
ONT
-
SJC
5h 30m
2 stops
$162Southwest
Mon, Aug 24 - Mon, Aug 31
Southwest Logo
10:55 am - 12:10 pm
SJC
-
ONT
1h 15mnonstop
Southwest Logo
6:45 pm - 7:55 pm
ONT
-
SJC
1h 10mnonstop
$177Southwest
Sat, Jun 20 - Tue, Jun 30
Southwest Logo
8:40 pm - 9:55 pm
SJC
-
ONT
1h 15mnonstop
Southwest Logo
8:55 pm - 10:05 pm
ONT
-
SJC
1h 10mnonstop
$187Southwest
Mon, Aug 24 - Mon, Aug 31
Southwest Logo
8:10 pm - 9:25 pm
SJC
-
ONT
1h 15mnonstop
Southwest Logo
2:40 pm - 9:35 pm
ONT
-
SJC
6h 55m
2 stops
$192Southwest
Mon, Aug 3 - Tue, Aug 4
Southwest Logo
8:15 pm - 9:35 pm
SJC
-
ONT
1h 20mnonstop
Southwest Logo
4:45 pm - 8:05 pm
ONT
-
SJC
3h 20m
1 stop
$193Southwest
Sat, Jun 20 - Tue, Jun 30
Southwest Logo
6:05 am - 7:25 am
SJC
-
ONT
1h 20mnonstop
Southwest Logo
7:20 pm - 11:25 pm
ONT
-
SJC
4h 05m
1 stop
$197Southwest
Booking Insights

KAYAK's insights & trends for San Jose to Ontario flights

Get data-powered insights and trends into flights from San Jose to Ontario to help you find the cheapest flights, the best time to fly and much more.

How much is a round-trip flight from San Jose, California to Ontario?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from San Jose, California to Ontario departing in June.

What’s the cheapest day of the week to fly from San Jose to Ontario?

The average price of all round-trip flights from San Jose to Ontario clicked on KAYAK for each day over the last 12 months.

For San Jose to Ontario, Monday is the cheapest day to fly on average and Tuesday is the most expensive. Flying from Ontario back to San Jose, the best deals are generally found on Saturday, with Monday being the most expensive.

What is the cheapest month to fly from San Jose to Ontario?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from San Jose to Ontario, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from San Jose to Ontario is August, where tickets cost $244 (return) on average. On the other hand, the most expensive months are January and February, where the average cost of round-trip tickets is $353 and $305 respectively.

How far in advance should I book a flight from San Jose to Ontario?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from San Jose to Ontario, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from San Jose to Ontario, you should book around 3 weeks before departure, which saves you about 53% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 9 weeks before departure.

Expert advice

Expert advice for your flight from San Jose to Ontario

 
AI-powered summary based on content written by travel experts. AI can make mistakes.
KAYAK teamed up with top travel experts to share the best tips for your journey.
Our travel experts
Jennifer Simonson

Jennifer Simonson

Expert on ONT

Jennifer Simonson is driven by her lifelong commitment to exploring the globe. Her insatiable curiosity had led her to immerse herself into diverse locations like Oklahoma City and Pismo. Her hotel recommendations are the result of the myriad hotels she's stayed at across her travels. Along her journey, she cherishes engaging conversations with locals, indulging in the finest ice cream, trying her hand at surfing, and embarking on nature-filled hikes.

Bill Fink

Bill Fink

Expert on SJC

Bill is an award-winning travel writer with extensive credits covering airlines and the aviation industry for publications including AARP, AFAR, The Points Guy and Yahoo. Based in Portland, Oregon, Bill has traveled to more than 75 countries - and been late for his flight in most of them. He once achieved top-level frequent flier status for all of American, Delta and United Airlines during a single year.

Good to know

Low seasonJanuary
Cheapest flight$69
Best time to beat the crowds but there is an average 24% increase in price.
Most popular time to fly with an average 5% increase in price.
Flight from San Jose to Ontario

When to book flights from San Jose to Ontario

Are your dates flexible? Find out the best times to travel from San Jose to Ontario based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from San Jose to Ontario

  • Are there car rentals at Ontario International Airport?

    Numerous car hire companies operate their desks at ONT, enabling you to leap into the adventure of the city as soon as you land in Ontario. Among the popular service providers are Hertz and Avis. The counters are located past the baggage claim. Go downstairs to the street level, just before the terminal exit. A courtesy shuttle will ferry you to the pick up area.

  • Are there accessible services at Ontario International Airport?

    Passengers with reduced mobility have no cause to worry as ONT caters to the needs of persons arriving from San Jose. The amenities at this facility are wheelchair accessible, including restrooms, bathrooms and elevators. Also, you’ll meet friendly agents ready to guide you.

  • Which is the best way to get to downtown from Ontario International Airport (ONT)?

    Taxis offer the quickest means of commuting from ONT to the city center of Ontario, covering the 2.4-mile distance in less than 10min. However, those traveling on a budget and are keen to save a few coins should consider taking a Metro bus and will get there in about 12 minutes.

  • Does SJC have nursing rooms?

    Families passing through SJC with their little ones shouldn’t worry as the establishment features nursing and lactation rooms at the disposal of breastfeeding and breast-pumping moms. These amenities are located close to gates 17, 21, 24, and 26, and are equipped with comfortable seats, baby changing tables, and sinks.

  • What is the cheapest flight from San Jose to Ontario?

    In the last 3 days, the lowest price for a flight from San Jose to Ontario was $69 for a one-way ticket and $137 for a round-trip.

  • Do I need a passport to fly between San Jose and Ontario?

    Even though you are not required to have a passport, keep in mind that an official ID is needed to board the airplane.

  • Which airlines offer Wi-Fi service onboard planes from San Jose to Ontario?

    Alaska Airlines, Delta, American Airlines, and JetBlue offer inflight Wi-Fi service on the San Jose to Ontario flight route.

  • Which aircraft models fly most regularly from San Jose to Ontario?

    The Boeing 737 MAX 8 is the aircraft model that flies most regularly on the San Jose to Ontario flight route.

  • Which airline alliances offer flights from San Jose to Ontario?

    SkyTeam is the only airline alliance operating flights between San Jose and Ontario.

  • On which days can I fly direct from San Jose to Ontario?

    There are nonstop flights from San Jose to Ontario on a daily basis.

  • Which is the best airline for flights from San Jose to Ontario, Southwest or Delta?

    The two airlines most popular with KAYAK users for flights from San Jose to Ontario are Southwest and Delta. With an average price for the route of $293 and an overall rating of 8.0, Southwest is the most popular choice. Delta is also a great choice for the route, with an average price of $188 and an overall rating of 7.9.

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

    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 San Jose to Ontario.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Ontario from San Jose 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 San Jose to Ontario?

    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 Ontario with an airline and back to San Jose with another airline. Booking your flights between San Jose and ONT can sometimes prove cheaper using this method.

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

    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 Ontario from San Jose up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

KAYAK’s top tips for finding a cheap flight from San Jose to Ontario

  • Looking for a cheap flight? 25% of our users found flights on this route for $199 or less one-way and $190 or less round-trip.
  • Several transportation options connect the city center of San Jose to San Jose International Airport (SJC), including buses and trams. 3.9 miles. Bus line 22 completes this 3.9-mile journey in approximately 32 minutes. Still, if you want to get there quickly, consider taking a taxi which takes about 8 minutes to link the two destinations.
  • Travelers flying aboard Southwest Airlines from San Jose to Ontario should keep in mind that the carrier runs its hub at San Jose International Airport (SJC). The airline uses Terminal B, and you can enjoy the various paid access lounges at this facility. For instance, The Club SJC is conveniently situated between Terminals A and B, and you’ll enjoy priority clearance at the security desk.
  • There are two operational terminals at San Jose International Airport (SJC); Terminal A and Terminal B. Departing travelers, both domestic and international use Terminals A, whereas all international arrivals use Terminal B. Inter-terminal movement is facilitated by the walkways leading through the hallway. Furthermore, a regular courtesy shuttle runs between the terminals at a 7-10-minute interval.
  • The multi-level parking garages at San Jose International Airport make it easy for you to leave your car behind before flying to Ontario. The available options include self-parking, covered, long-term, and valet, and you can be sure to get a convenient space to drop off your vehicle. Suppose you want an Economy parking lot, head to the north of Terminal A.
  • American Airlines is one of the carriers that allow you to enter the cabin with your furry friends when flying from San Jose to Ontario. Typically, the permitted pets include household animals like cats and dogs. Still, the pets must bear their valid medical certificates, the owners must restrain them in their cages throughout the voyage.

Prefer to fly direct from San Jose to Ontario?

 
Direct data is based off flight results for the next 60 days. Find direct flights from all airlines flying direct from San Jose to Ontario.
Find which airlines fly direct from San Jose Airport to Ontario Airport, which days they fly and book direct flights.

Direct departures

San Jose to Ontario

Monday

Southwest

Southwest

Tuesday

Southwest

Southwest

Wednesday

Southwest

Southwest

Thursday

Southwest

Southwest

Friday

Southwest

Southwest

Saturday

Southwest

Southwest

Sunday

Southwest

Southwest

See more direct flights

Direct returns

Ontario to San Jose

Monday

Southwest

Southwest

Tuesday

Southwest

Southwest

Wednesday

Southwest

Southwest

Thursday

Southwest

Southwest

Friday

Southwest

Southwest

Saturday

Southwest

Southwest

Sunday

Southwest

Southwest

See more direct flights

Reviews of the top 3 airlines serving from San Jose to Ontario

 
See real verified KAYAK customer reviews for airlines flying from San Jose to Ontario. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from San Jose to Ontario? 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.
8.0
SouthwestOverall score based on 4266 reviews
8.6Crew
7.5Entertainment
8.1Boarding
7.0Food
8.0Comfort
Airline reviews

The first time I flew in the extra legroom section. It was difficult to notice a difference. I had bad luck with my neighbors. The crew was okay. Southwest has reduced the live TV options.

4.0 OkayAnonymous, May 2026
MDW - LAX
Read more Southwest reviews

The first time I flew in the extra legroom section. It was difficult to notice a difference. I had bad luck with my neighbors. The crew was okay. Southwest has reduced the live TV options.

No gluten free snacks. Seats felt worn or bare bones even though it was a new 737 MAX 8.

Plane was clean and comfortable. Flight attendants and gate staff were professional, friendly and efficient. Boarding and deplaning were orderly and efficient. All in all, the typical excellent Southwest experience.

Not having a five hour delay with little notice! The crew was very kind, though, and just as tired as we passengers were. The flight didn't depart until nearly 1 am...and no reason was ever given.

Delayed flight, lack of information, boarding process is a mess as is the carryon luggage causing issues when leaving the plane….just a poor experience.

This leg was much better, but we did have to have a 3 hour lay o er after coming from a very exhausting hiccup with our flight from BNA to Den

The Air hostess were very rude on my flight from Houston to Austin . Their regular communication itself felt a they are shouting at people.

Boarding was easy. The seats are small and fairly uncomfortable

The problem with the seat assignments is that there were a lot of rows in the front that were empty but my row at the back was full. Just not so pleasant.

No food or entertainment, just a quick 40 minute flight. A little bumpy due to Santa Ana winds but pilot has no control over that. Good flight and landing!

Everything went smoothly, although the usual gripes about airline travel were still present: the boarding process is inefficient, the snack selection is limited, and so on. Since there was extra space on the flight, the gate agent rearranged many people's seats to put people on the aisles and windows, leaving the middle seats empty, as much as possible, which was pretty great.

While they turned off most cabin lights to allow people to sleep, I was bothered by how bright the side lights still were. It was still quite bright for me in a window seat, when I wish I could have slept!

One of the flight attendants was a little cranky. I appreciated the free wifi and plug to charge my laptop

WiFi didn’t work most of the time. The usb chargers would work only occasionally for 5 mins and wouldn’t charge after that. Had to keep trying repeatedly at each of the seats in the row.

The crew bent over backwards to thank us for flying and make us comfortable. The food service was quick and efficient. The Captain communicated and said goodbye and thank you as we departed. They really stood out!

Generally on time departures and arrivals, clean planes, sky miles membership provides great benefits (complimentary upgrades, etc).

my mom urmila patel needed a wheelchair which was not available on the curbside. she needed to walk almost 50 meters inside (at the risk of falling) and then had to wait in line to get a wheelchair (this is not ok). Once obtained she had to seat in it for 30-45 minutes for someone to take her in thru the checkin process (which was fairly smooth and easy). the lady who helped her with her checkin process was very courteous and helpful

Staff at the check-in counter were friendly, happy and helpful. They tagged our bags and sent us to “bag drop off” but were not very clear about where that was. The airport was busy we headed off in what we thought was the right direction until a gentleman waved us down and actually came after us. He was the baggage handler for Delta and recognized our “deer in the headlights “ look-he brought us to the right area (which was marked as the Southwest Airlines Drop Off) and sent us on our way. Wonderful guy, low key and working with a big smile on his face. Loved it. Loved him.

Arlene was a great flight attendant. I also liked how one of the other flight attendants gave us a heads up about snacks and asked everyone to remove their headphones when it was their turn to order. Good idea.

I haven’t flown economy in over 20 years but it was not bad. Room by my feet for my bag and seat was roomy enough. Surprised in a good way.

They didn’t offer a water, even after I asked

Remind customers of the need to have passport or new ID for boarding.

The flight never took off and we spent 7 hours at the airport

Our flight was canceled. I will never use Kayak nor Frontier for travel again. The entire experience was a headache.

It was ok. It was expensive to check 2 bags ($75.00 per bag), and then it took a long time to wait for shuttle to take us from one terminal to the terminal where the plane was taking off at LAX. And all of this for a flight where we had to pay for any food or drink that was not water.

When I wanted to check in 3 hours prior to boarding time, the employees mentioned “a little over an hour delay” so I waited for an hour then I went to go look for food in the terminal and most people from that flight were in the same area looking for food. Finally I decided after food to check to see if it’s anytime closer and now it’s 2 mins until boarding closes?! What are you kidding me? I didn’t receive anything via sms about boarding now nor via email or on the intercom. I luckily made it through, barely, and then there’s no room for my carry on mind you I’m in the very first row so I had to place my purse in one further row back and my carry on sections down. Not sure who pays for better seats to get your stuff placed all over the plane but that was the worst experience I’ve ever had flying with anyone.

Terrible. The canceled my entire flight when I requested a refund for a trip frontier canceled trip one way.

i was unable to check in the flight. refund requested

I think Frontier was very good at communication. Their app worked very well. Loading was great and the flight was nice and easy.

This airline sucks. They offer low rates then charge you for everything, the app does not work well, the seats are the most uncomfortable. Maintenance issues on the flight, and you still have to sit through their credit card commercials. People are nice enough but does not make up for overall poor experience.

Everything you need to know for your flight from San Jose to Ontario

Information on your arrival and departure airports