SJC - ONT

$49 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 9/3. 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

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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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

Sat, Aug 23 - Mon, Aug 25
Southwest Logo
7:25 am - 8:40 amSJC-ONT
1h 15mnonstop
Southwest Logo
5:10 pm - 6:25 pmONT-SJC
1h 15mnonstop
$97Southwest
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Mon, Sep 22 - Wed, Sep 24
Southwest Logo
6:55 pm - 10:45 pmSJC-ONT
3h 50m1 stop
Southwest Logo
1:55 pm - 3:10 pmONT-SJC
1h 15mnonstop
$107Southwest
Find Deal
Sun, Sep 21 - Mon, Sep 22
Southwest Logo
7:00 am - 8:15 amSJC-ONT
1h 15mnonstop
Southwest Logo
5:10 pm - 6:25 pmONT-SJC
1h 15mnonstop
$124Southwest
Find Deal
Sat, Aug 23 - Mon, Aug 25
Southwest Logo
9:40 am - 8:05 pmSJC-ONT
10h 25m2 stops
Southwest Logo
5:10 pm - 6:25 pmONT-SJC
1h 15mnonstop
$139Southwest
Find Deal
Mon, Sep 22 - Wed, Sep 24
Southwest Logo
6:55 pm - 10:45 pmSJC-ONT
3h 50m1 stop
Southwest Logo
6:20 am - 11:10 amONT-SJC
4h 50m1 stop
$144Southwest
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Sun, Nov 2 - Mon, Nov 3
Southwest Logo
4:20 pm - 5:35 pmSJC-ONT
1h 15mnonstop
Southwest Logo
3:15 pm - 4:30 pmONT-SJC
1h 15mnonstop
$151Southwest
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Fri, Sep 5 - Sat, Sep 6
Frontier Logo
6:45 pm - 12:43 pmSJC-ONT
17h 58m1 stop
Frontier Logo
8:59 pm - 1:14 pmONT-SJC
16h 15m1 stop
$173Frontier
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Fri, Sep 5 - Sat, Sep 6
Frontier Logo
12:25 pm - 7:54 pmSJC-ONT
7h 29m1 stop
Frontier Logo
8:59 pm - 1:14 pmONT-SJC
16h 15m1 stop
$175Frontier
Find Deal
Thu, Sep 18 - Wed, Sep 24
Frontier Logo
7:12 pm - 7:17 amSJC-ONT
12h 05m1 stop
Frontier Logo
8:59 pm - 1:14 pmONT-SJC
16h 15m1 stop
$177Frontier
Find Deal
Wed, Sep 10 - Tue, Sep 16
American Airlines Logo
6:00 am - 6:16 pmSJC-ONT
12h 16m1 stop
American Airlines Logo
4:45 pm - 12:04 pmONT-SJC
19h 19m1 stop
$223American Airlines
Find Deal
Expert advice

Expert advice for your flight from San Jose to Ontario

 
Snippets provided in this section are AI-generated based on a summarization of KAYAK-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.
KAYAK teamed up with top travel experts to share the best tips for your journey.
Airports
SJC

SJC offers a manageable layout and quick access to Silicon Valley, making it ideal for business travelers heading to tech hubs like Santa Clara and Palo Alto.

ONT

For a budget-friendly arrival, use Omnitrans Bus Route 61, connecting ONT to local transit centers with frequent service during peak hours.

Read more about ONTby Jennifer Simonson
Our travel experts
Jennifer Simonson

Jennifer Simonson

Expert on ONT

Jennifer Simonson

Jennifer Simonson

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.

Read more
Bill Fink

Bill Fink

Expert on SJC

Bill Fink

Bill Fink

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.

Read more
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.

Find cheap flights to Ontario
Find cheap flights to Ontario

Planning a trip from San Jose to Ontario? KAYAK’s data-powered insights will help you find cheap flights. Learn the best time to fly, how early to book your ticket, and other tips to secure great prices.

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, Tuesday is the cheapest day to fly on average and Saturday 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 $151 (return) on average. On the other hand, the most expensive months are November and December, where the average cost of round-trip tickets is $280 and $280 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 46% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 13 weeks before departure.

Good to know

Low seasonJune
Cheapest flight$49
Best time to beat the crowds with an average 0% drop in price.
Most popular time to fly with an average 13% 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 $49 for a one-way ticket and $97 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?

    Delta, Alaska Airlines, American Airlines, and Hawaiian Airlines 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 737-700 Passenger/BBJ1 (winglets) is the aircraft model that flies most regularly on the San Jose to Ontario flight route.

  • 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 Alaska Airlines?

    The two airlines most popular with KAYAK users for flights from San Jose to Ontario are Southwest and Alaska Airlines. With an average price for the route of $272 and an overall rating of 8.0, Southwest is the most popular choice. Alaska Airlines is also a great choice for the route, with an average price of $296 and an overall rating of 8.0.

  • 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 $68 or less one-way and $114 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 4 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
Alaska AirlinesOverall score based on 10000 reviews
8.5Crew
7.1Food
7.1Entertainment
7.8Comfort
8.1Boarding
Airline reviews

Departing flight to San Diego was delayed. Return flight from SD to SBP was delayed. Not terrible but not ideal

4.0 OkaySean, Jul 2025SBP - SAN
Read more Alaska Airlines reviews

Departing flight to San Diego was delayed. Return flight from SD to SBP was delayed. Not terrible but not ideal

My email notifications were silenced, so I didn't get word that the departing flight had changed gates. It wasn't until I noticed that few people had gathered for the flight that I checked the airport schedule board, 20 minutes before boarding. I then told several people at the old gate of the change. If I was to receive a text I would have been notified of the change earlier, Or to hear an announcement over the airport intercom.

delayed flight 3 hours, then took 45 min to get to gate and another 10 min to open door

Delayed flight both ways. Then, on the return flight, we were stuck on the tarmac for at least 30+ minutes. Idk what happened, but this was a bad experience.

Coffee or tea service would be nice for an evening flight, water or juice not good enough.

Flight was very warm. It felt like there was no working AC.

Big delay of over 7 hours on next leg of trip with Alaska. Would have been nice to have food or something

Delayed. It's not our first flight with them either, it's actually our 3rd and all 3 were delayed by hours each time. It was a myriad of delays. On one flight we boarded after being delayed for a little over an hr, only to be told we were going to sit in the plane for another hour before departing. Once landed, we waited another 40ish min to get to our gate. On another flight, flight was delayed just under 3 hrs but atleast we got to wait it out at the airport terminal. Its just a bad experience overall flying with Alaska Airlines.

Great crew, smooth flight and landing. Wish they would offer Dr. Pepper and a choice of flavors of pretzels.

Flight last minute delayed 2 hours for crew calling out sick

Very smooth checking in our luggage with a super pleasant SW agent. I enjoyed a fun entertaining movie.

First time traveling on Southwest since bag fees were implemented. Usual good service. Just more expensive now.

It was a perfect flight in all aspects! Both legs!

Boarding process, crew were good. But the seats were so uncomfortable that was all I could focus on. I literally had to sit forward so that all 3 of us could fit in row. I will try to avoid Southwest in the future for any flights over 60 minutes.

Great flight, 47 passengers on a 180 seat plane. Stewardess was pleasant and cheerful.

Great experience flying Southwest. The crew was really kind and helpful, and very friendly with our toddler.

Plane late from DC to Austin 30 minutes. Crew made up much of the time enroute to San Diego.

I recently flew Southwest from San Jose to Honolulu. I was very impressed with the flight crew, especially the flight attendant in charge of the front of the plane. She came through the aisle at least five times for drinks and water, and two times for snacks. I have not seen such service since I flew first class. Also, for the first time, they gave us the correct baggage claim number, and the luggage came out quickly. I can't wait for Southwest to have assigned seating! I absolutely hate the Cattle Call boarding procedure and the mad dash to get seats and overhead bins. However, the boarding was efficient.

Fine, but how to board on SW versus othrr airlines, is just lame. Goood staff though and all was solid otherwise.

Was as expected. Crowed planes. Too many carryons delaying takeoff. But the ride only took an hour and saved me a lot of time SFO is a not a great airport.

Late departure by 1:45min. No explanation why. During boarding inconsistent policing of their baggage rules. Before takeoff and lamdimg strange obsession with window shade and armrest positions. Don't know why they care. 15 min tarmac delay on arrival, they blamed airport congestion but we were the o lh flight waiting, it was clear it was due to poor staff planning (only one ground crew to receive airplanes and multiple arrivals) Got there but was rrally lame the whole trip.

Boarding was a breeze, however, two of the flights that I boarded with Spirit did not have Wi-Fi available.

Very good. Nothing more or less than expected. No complaints.

My experience with the spirit as a first time it was OK, but the seats need a little cushion, the problem I had the most impacted me was when checking in the scales were so off and wrong. It will tell that you would have more weight, which was not true. The scale was say that it had Thirty Eight Pounds, when get in the labels when we send the luggage into the band. It says that it was overweight. I really really dislike that because the scales are not accurate. If I use Spirit and I have that issue again. That will be my last time flying with the spirit, even though I like so much to service the planes, and everything else

hahaha we are delayed for one hour plus.. but thx we arrived San Diego safe

Worst airline ever! The guy weighing my bag had his foot on the metal plate and when I called him out on it, I got this stupid little smirk. La is a scam and so is Spirit Airlines. All the flight attendants looked like they hated our flight just as much as we did.

Last minute 2-3 hr delay in flight schedule; no explanation Unexpected extra $52 charge What's the benefit of choosing a cheap airline if you trick people last minute and force them to pay extra last minute? Did not appreciate being cornered.

Unclear pricing; ended up being charged an extra $52 just to get onboard

Spirit is awful. Too expensive for what you get. Stop nickel and diming.

would be great to get basic water, soda at least and stop charging for carry ons

Decent clean onboard experience. Okay discount airline experience. Unfortunately, any customer service interactions are difficult and unhelpful. There is no service. Also, a premium seat only gets you premium boarding if you line up first. Once they start general boarding you must go to the back of the line. Not very premium

The crew was mostly okay. The flight attendant who answered our questions was curt and unhelpful unfortunately. He seemed upset and I understand having off days.

Very bad! No good service delayed my second connection flight

They canceled flight. Hard to believe there was even a plane incoming for us to get on

Cancelled flight after I arrived at airport after 75 min drive and parking. Next flight was 4 days in the future. Had to scramble and buy a much more expensive flight on another carrier.

I liked the turn-style feature at gate 209B at LAX. Very efficient process. The gate staff also made several, clearly directed announcements so I felt very informed.

Plane was down graded and I lost my uncharged exit row with more leg room. No mention or offer of refund from podium. Flight attendant was nice to explain this happens often and that I could request a refund via online form submission. I did this and have heard nothing back.

Horrendous. I do not recommend Frontier. The passengers lack manners and decency, and the flight attendants lack professionalism. If I wasn’t in a bind to fly with 48 hours notice for a job interview, I would not have selected a flight with Frontier and I never plan to fly with them in the future.

The seats were hard molded plastic covered in plastic vinyl. And the scam to charge people extra to sit together. Don’t they know we can just ask someone to trade seats. And watching the staff separate young children from parents… super classy. We had to guilt them into offering up our seats. This companies policies suck. Don’t give them your money.

The seats were awful, hard plastic covered in sheet vinyl. The airline tries to scam you into paying extra to get seat together when the flight wasn’t full. They were going to separate a family with young children but my wife who had a row to herself gave up her seat so the young mom could be with her young boys. I’m never giving this airline my money again.

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