SJC - ONT

$59 Find Cheap Flights from San Jose to Ontario - Compare and Save

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 7/28. 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.
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1 adult, Economy, 0 bags

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Everything you should know

Cheapest round-trip
$149
Typical prices: $205-$479
Southwest
Sat 8/8Mon 8/10
SJC - ONT • Non-stop
Cheapest non-stop
$181
Typical prices: $197-$432
Southwest
Tue 9/29Sat 10/3
SJC - ONT • Non-stop
Top airlines
Cheapest • from $159 (round-trip)
Best reviews • 7.9 score
Airline reviews
Airline reviews
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Airline reviews
Airline reviews
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Nonstop flights
You can fly direct with Southwest. Average duration is 1h 18m
Direct flights
Direct flights
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Direct flights
Direct flights
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When to book
in advance
Our data shows that travelers who book at least 5 weeks in advance save around 63% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
Cheapest • 14% price drop
Most popular
Good to know
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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

Sat, Aug 8 - Mon, Aug 10
Southwest Logo
1:00 pm - 2:15 pm
SJC
-
ONT
1h 15mnonstop
Southwest Logo
6:45 pm - 7:55 pm
ONT
-
SJC
1h 10mnonstop
$149Southwest
Sat, Aug 8 - Mon, Aug 10
Southwest Logo
9:05 am - 10:20 am
SJC
-
ONT
1h 15mnonstop
Southwest Logo
5:40 am - 9:10 am
ONT
-
SJC
3h 30m
1 stop
$159Southwest
Sat, Aug 8 - Mon, Aug 10
Southwest Logo
5:00 pm - 6:20 pm
SJC
-
ONT
1h 20mnonstop
Southwest Logo
2:40 pm - 9:10 pm
ONT
-
SJC
6h 30m
2 stops
$164Southwest
Sat, Oct 3 - Mon, Oct 5
Southwest Logo
6:15 am - 11:10 am
SJC
-
ONT
4h 55m
1 stop
Southwest Logo
8:20 am - 1:15 pm
ONT
-
SJC
4h 55m
1 stop
$169Southwest
Sat, Aug 8 - Mon, Aug 10
Southwest Logo
10:25 am - 3:15 pm
SJC
-
ONT
4h 50m
1 stop
Southwest Logo
2:40 pm - 9:10 pm
ONT
-
SJC
6h 30m
2 stops
$174Southwest
Tue, Sep 29 - Sat, Oct 3
Southwest Logo
12:20 pm - 1:35 pm
SJC
-
ONT
1h 15mnonstop
Southwest Logo
7:35 am - 8:50 am
ONT
-
SJC
1h 15mnonstop
$181Southwest
Tue, Sep 29 - Sat, Oct 3
Southwest Logo
8:00 am - 2:05 pm
SJC
-
ONT
6h 05m
1 stop
Southwest Logo
11:30 am - 12:40 pm
ONT
-
SJC
1h 10mnonstop
$191Southwest
Tue, Sep 29 - Sat, Oct 3
Southwest Logo
8:00 am - 4:05 pm
SJC
-
ONT
8h 05m
2 stops
Southwest Logo
7:35 am - 8:50 am
ONT
-
SJC
1h 15mnonstop
$196Southwest
Wed, Aug 19 - Wed, Aug 26
Southwest Logo
12:20 pm - 1:35 pm
SJC
-
ONT
1h 15mnonstop
Southwest Logo
4:45 pm - 8:05 pm
ONT
-
SJC
3h 20m
1 stop
$197Southwest
Wed, Aug 19 - Wed, Aug 26
Southwest Logo
7:15 am - 8:30 am
SJC
-
ONT
1h 15mnonstop
Southwest Logo
9:05 am - 10:15 am
ONT
-
SJC
1h 10mnonstop
$198Southwest
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 August.

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, Thursday is the cheapest day to fly on average and Monday is the most expensive. Flying from Ontario back to San Jose, the best deals are generally found on Thursday, 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 September, where tickets cost $259 (return) on average. On the other hand, the most expensive months are January and August, where the average cost of round-trip tickets is $379 and $339 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 5 weeks before departure, which saves you about 63% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 18 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$59
Best time to beat the crowds but there is an average 25% increase in price.
Most popular time to fly and prices are also 1% lower on average.
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 5 days, the lowest price for a flight from San Jose to Ontario was $91 for a one-way ticket and $159 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, JetBlue, and American 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 737-800 Passenger/BBJ2 (winglets) 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 $299 and an overall rating of 7.9, Southwest is the most popular choice. Delta is also a great choice for the route, with an average price of $177 and an overall rating of 7.8.

  • 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 $250 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.
7.9
SouthwestOverall score based on 4249 reviews
7.0Food
8.6Crew
7.5Entertainment
8.1Boarding
8.0Comfort
Airline reviews

It was just okay, no frills, basic transportation with no luxury. No screens on the seats, no water or drinks on a short flight. Full flight but at least it was on time.

6.0 GoodSteven, Jun 2026
LAS - ONT
Read more Southwest reviews

It was just okay, no frills, basic transportation with no luxury. No screens on the seats, no water or drinks on a short flight. Full flight but at least it was on time.

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.

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.

Good but I prefer choose your own seat. With the new assigned seats they should board from the back I see no advantage to this new boarding. Just like every other airline

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.

Forget beverage, they didn't even have water for half the passangers?

Flight was not full! Had a whole row to myself.

Wifi didn’t work, no service, seats are hard as rocks

Our flight to Oakland was great bc the plane was new but it was delayed by 15min not bad at all. Over all it was an 8/10

The flight in it self was good. The delays looking for pilots was unexpected.

Flight delayed four separate times. I’m now one hour hours late to landing.

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!

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

I was in first class and literally the men behind me were so aggressively loud I moved myself to economy. This has become so common on Delta - people using audio without headphones, and men on 12am / late night flights drinking and yelling to talk to each other which prevents anyone around them from resting. Pretty crazy to have to move from first to economy (poorer service, less comfort...). Wild wild. Looking into other airlines.

Awesome! On time flight, early arrival, and a complimentary upgrade!

Staff were friendly and happy. Delta could make sure passengers that don't have the app know of changes. Without Kayak I would not have known about the change of gate or the delay. Kayak was faster to notify me.

There are 4 flights in consecutive gates with about the same departure time. Two flights were boarding at the same time. One was delayed or boarding would be happening at the same time. I am not sure what Delta and LAX need to do to have a better layout at the end of Terminal 2

Flew first class so everything was great. But maybe because the flights were red eye, no meals were served, just chips. I flew Alaska Air 1st class at 9PM (2 hour flight) and they served beef short rib sliders!

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

Plane was turned around due to fog half way into the flight, Delta did not properly direct passengers to stay on same flight and instead failed to properly rebook on Alaska

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.

No frills for sure. No gate announcements about flight delay, not even water to drink on the flight.

Charges unexpected. For seat that didnt recline. Please reverse extra seat and carryon charge. Bad business that is a bait and switch.

There was no easy way to check in. I don't want to install an app to checkin. I will use alaska from now on because they have a web check in method that is easy.

I went to the Frontier counter in San Jose at 1030am or so on Sunday 10/13/24 to see if I could get an earlier flight to San Diego in lieu of my reserved 630pm flight. One thing led to another, and I was able to obtain an open seat for about $ 56. on the earlier flight. Fine. Then the agent asked if I "was checking a bag". Not knowing that carry-ons cost extra per Frontier policy, I thought that she meant a regular checked bag. Therefore, I said no. Once I got to the gate, the same gate agent who sold me a ticket told me that I had to pay $99 for a carry-on, and that all bags were extra on Frontier. Having never flown on Frontier, I was not aware of this. Part of the issue was that she was not a native English speaker, so there was a miscommunication as to what "bag" meant. I would have preferred for her to have clearly let me know at the front counter that any bag including a carry-on cost $99. It would have had the same outcome, as I had to take my carry-on. But it got hectic at the last minute at the gate itself. The baggage policy should have mentioned "including carry-ons" when we first spoke.

Most horrible airlines. Please avoid it. It's ok to spend $50 extra for delta, united or Alaska

Flight was cancelled and was not able to get another flight thru Frontier. Per frontier a refund was issued but I do not see a refund on my Afirm account.

The agent at check-in was strident, unwelcoming, and condescending to customers ahead of me.

Was charged 99 dollars for a bag despite agents previously telling me it would be ok. Customer service was unhelpful

I will like you ( Frontier Airlines) to fly into LAX instead of ONT because I live in LA and the subway takes me to my house in just 15 minutes

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

Information on your arrival and departure airports