SJC - ONT

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

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Everything you should know

Cheapest round-trip
$117
Typical prices: $226-$404
Southwest
Wed 9/12Wed 9/12
SJC - ONT • Non-stop
Cheapest one-way
$59
Typical prices: $139-$305
Southwest
Sun 9/23
SJC - ONT • Non-stop
Nonstop flights
You can fly direct with Southwest. Average duration is 1h 18m
Direct flights
+1
Direct flights
+1
When to book
in advance
Our data shows that travelers who book at least 10 weeks in advance save around 59% compared to booking last minute.
Insights
Insights
When to travel
Cheapest • 16% price drop
Most popular
Good to know
+1
Good to know
+1
Top layover airports
Cheapest • Avg $287 (round-trip)
Shortest trip • 5h 39m (one-way)
Insights
Insights
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Expert advice
Flight Deals

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

 
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from San Jose to Ontario

Mon, Sep 14 - Thu, Sep 17
Southwest Logo
6:30 am - 7:50 amSJC  San Jose-ONT Ontario
1h 20mnonstop
Southwest Logo
3:40 pm - 4:55 pmONT  Ontario-SJC San Jose
1h 15mnonstop
$117Southwest
Mon, Sep 21 - Mon, Sep 28
Southwest Logo
6:30 am - 7:50 amSJC  San Jose-ONT Ontario
1h 20mnonstop
Southwest Logo
3:40 pm - 4:55 pmONT  Ontario-SJC San Jose
1h 15mnonstop
$117Southwest
Sat, Sep 26 - Wed, Sep 30
Southwest Logo
1:00 pm - 2:15 pmSJC  San Jose-ONT Ontario
1h 15mnonstop
Southwest Logo
6:25 pm - 7:35 pmONT  Ontario-SJC San Jose
1h 10mnonstop
$117Southwest
Thu, Sep 17 - Mon, Sep 21
Frontier Logo
1:38 pm - 7:04 amSJC  San Jose-ONT Ontario
17h 26m1 stop Las Vegas Harry Reid Intl
Frontier Logo
8:00 am - 12:43 pmONT  Ontario-SJC San Jose
4h 43m1 stop Las Vegas Harry Reid Intl
$118Frontier
Thu, Sep 24 - Mon, Sep 28
Frontier Logo
10:47 pm - 7:04 amSJC  San Jose-ONT Ontario
8h 17m1 stop Las Vegas Harry Reid Intl
Frontier Logo
8:00 am - 12:43 pmONT  Ontario-SJC San Jose
4h 43m1 stop Las Vegas Harry Reid Intl
$118Frontier
Thu, Sep 17 - Mon, Sep 21
Frontier Logo
10:47 pm - 7:04 amSJC  San Jose-ONT Ontario
8h 17m1 stop Las Vegas Harry Reid Intl
Frontier Logo
8:00 am - 12:43 pmONT  Ontario-SJC San Jose
4h 43m1 stop Las Vegas Harry Reid Intl
$118Frontier
Thu, Sep 17 - Mon, Sep 21
Multiple Airlines Logo
10:47 pm - 11:22 amSJC  San Jose-ONT Ontario
12h 35m1 stop Las Vegas Harry Reid Intl
Multiple Airlines Logo
4:27 pm - 11:19 amONT  Ontario-SJC San Jose
18h 52m2 stops Santa Rosa Sonoma County San Diego
$270Multiple Airlines
Tue, Sep 22 - Thu, Sep 24
Multiple Airlines Logo
9:39 am - 5:18 pmSJC  San Jose-ONT Ontario
7h 39m1 stop Portland
Multiple Airlines Logo
8:00 am - 12:43 pmONT  Ontario-SJC San Jose
4h 43m1 stop Las Vegas Harry Reid Intl
$271Multiple Airlines
Thu, Nov 12 - Thu, Nov 26
Delta Logo
7:21 am - 11:00 pmSJC  San Jose-ONT Ontario
15h 39m1 stop Seattle/Tacoma Intl
Delta Logo
6:00 am - 7:52 pmONT  Ontario-SJC San Jose
13h 52m2 stops Salt Lake City Seattle/Tacoma Intl
$449Delta
Fri, Sep 18 - Tue, Oct 6
Delta Logo
8:53 pm - 12:14 pmSJC  San Jose-ONT Ontario
15h 21m2 stops Seattle/Tacoma Intl Salt Lake City
Delta Logo
11:56 am - 6:48 pmONT  Ontario-SJC San Jose
6h 52m1 stop Seattle/Tacoma Intl
$523Delta
Booking Insights

Price, demand and travel trends for San Jose to Ontario flights

Use KAYAK data on prices, travel dates, airlines and seasonal trends to compare options and book flights from San Jose to Ontario with more confidence.

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

Round-trip flights from San Jose to Ontario start at $117. Prices are below average for this route right now, with typical round-trip fares ranging from $226 to $404. The lowest price found in the past 5 days was $117 on Southwest.

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

Thursday is the cheapest day of the week to fly from San Jose to Ontario, it is 8% cheaper than the average day. Tuesday is the most expensive day with flight prices 18% higher than average. Based on deals found by KAYAK users in the last 12 months.

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

  • September is the cheapest month to fly from San Jose to Ontario at $255 round-trip.
  • December ($432) and February ($359) are the most expensive months.
  • The price difference between flying in the cheapest and most expensive months is 69% on average.
This is based on KAYAK aggregated and averaged internal data over the past 12 months.

When are prices from San Jose to Ontario the cheapest?

Flights from San Jose to Ontario are cheapest 10 weeks before departure. Booking in this window typically costs about 59% less than the average last-minute fare (within 2 weeks of the flight), based on KAYAK data.

Expert advice

Expert advice for your flight from San Jose to Ontario

 
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.

Key details for San Jose to Ontario flights

Low season

June

Cheapest flight

$59
Best time to beat the crowds with an average 1% drop 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

Your San Jose to Ontario flight questions, answered

Find helpful route details based on KAYAK data, including flight times, airports, airlines and booking questions.

  • 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.

  • Which airlines offer extra legroom and free seat selection on San Jose to Ontario flights?

    Among airlines operating San Jose to Ontario flights:

    • Southwest: offers free seat selection

    Extra legroom and free seat selection availability depends on fare class and route.

  • What airlines are available from San Jose to Ontario?

    Only Southwest operates flights between San Jose and Ontario.

  • Which airports can I use when flying from San Jose to Ontario?

    Flights from San Jose to Ontario usually depart from San Jose (SJC) and arrive at Ontario (ONT).

  • Which airlines include bags at no extra cost on San Jose to Ontario flights?

    Here are some options for this route, based on selected ticket types and cabin classes:

    • Southwest: a cabin bag and a checked bag in Economy Class
    • JetBlue: a cabin bag in Economy Class class

    Bag allowance can vary by ticket type, cabin class, route and airline, so travelers should check the fare details before booking.

  • What cabin classes can I book on flights from San Jose to Ontario?

    Only Economy Class is available on flights from San Jose to Ontario.

  • How much can I save by taking a layover when flying from San Jose to Ontario?

    On this route, layover flights are cheaper than nonstop options on average. Layover fares average $287 round-trip via Las Vegas Harry Reid Intl (LAS), compared to $303 for nonstop.

  • What is the standard checked-bag allowance on flights from San Jose to Ontario?

    There is no standard. Checked-bag policies vary by airline on this route. Most carriers charge $45–$90 for the first checked bag in economy. Premium fares and elite-status bookings typically include a free checked bag.

  • Which aircraft model is used most often on flights from San Jose to Ontario?

    The Boeing 737-800 Passenger/BBJ2 (winglets) family is used most often on this route, operated mainly by Southwest and Alaska Airlines. Other aircraft seen on the route include Boeing 737 MAX 8 variants.

  • Which airports do connecting flights from San Jose to Ontario pass through?

    One-stop flights from San Jose to Ontario most commonly connect through:

    • Phoenix Sky Harbor Intl (PHX) - 56% of one-stop connections
    • Las Vegas Harry Reid Intl (LAS) - 33% of one-stop connections
    • Denver Intl (DEN) - 11% of one-stop connections

    Phoenix Sky Harbor Intl (PHX) handles the largest share of one-stop connections on this route.

  • Can I save money by using flexible dates for flights from San Jose to Ontario?

    Yes. Being flexible with your travel dates can save you up to 23% on the San Jose to Ontario route. Thursday is the cheapest departure day at $279 round-trip on average, while Tuesday is the most expensive at $359, a difference of $80. KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

  • How are flight departures from San Jose to Ontario spread across the day?

    Morning is the busiest departure period on San Jose to Ontario flights, with 50% of flights leaving in that window. Afternoon departures account for 25%, evening flights for 25%, and night flights for 0%.

  • What popular places can I visit in Ontario?

    Some of the most popular sights in Ontario are Ontario Convention Center, Ontario Mills and Cucamonga-Guasti Regional Park. These are among the most viewed places in Ontario on KAYAK.

  • What are the earliest and latest flights from San Jose to Ontario?

    These are the earliest and latest flight times available from San Jose to Ontario:

    • Earliest: departs at 6:25 am and lands at 7:43 am
    • Latest: departs at 9:25 pm and lands at 10:43 pm.

    The flight takes about 1h 18m.

  • How expensive are last-minute San Jose to Ontario flights?

    Last-minute fares on this route - booked within 2 weeks of departure - run 83% above the route average of $302. Book 10 weeks before departure for the lowest fares.

  • How long is a flight from San Jose to Ontario?

    A nonstop flight from San Jose to Ontario takes 1h 18m, covering 333 miles.

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

    No, a passport is not required for this domestic route, but you will need a real ID-compliant driver's license, a state ID, or another TSA-accepted form of identification.

  • How are flight prices from San Jose to Ontario looking right now?

    One-way fares from San Jose to Ontario are currently lower than usual. Average one-way flight prices are about $115, which is 36% below the typical average for this route.

  • How much time can I save by choosing a different layover airport from San Jose to Ontario?

    Flying via Phoenix Sky Harbor Intl (PHX) gives the shortest average 1-stop total travel time at 5h 39m, compared with 7h 04m via Denver Intl (DEN) and 19h 34m via Las Vegas Harry Reid Intl (LAS).

  • What car rental options are available at Ontario Airport (ONT)?

    Ontario Airport (ONT) hosts 5 major car rental companies, with daily rates starting from around $18 for economy cars. Top options include:
    · Fox
    · Thrifty
    · Europcar
    · Dollar
    · Alamo

  • How much should I expect to pay for a San Jose to Ontario flight?

    Round-trip flights from San Jose to Ontario range from $226 to $404, with an average of $302 over the past 12 months. Anything below $226 counts as a good deal.

  • Which airlines offer Wi-Fi on San Jose to Ontario flights?

    JetBlue is the only airline on the San Jose to Ontario route offering in-flight Wi-Fi. Pricing depends on fare class.

Your guide to booking San Jose to Ontario flights

Get tips on when to book, when to fly and what to know before your trip.
  • If your dates can be flexible, aim for a Thursday departure instead of Tuesday. On this route, Thursday flights average $279 - about $80 less than Tuesday (22% savings) based on the last 12 months.
  • For the best chance at a low fare, aim to book around 10 weeks before you fly. On this route, that window historically saves about 59% versus last-minute pricing (KAYAK booking data, last 12 months).
  • If you can choose when to travel, plan your San Jose to Ontario trip for September. Fares historically average $255 round-trip in that month - typically $177 less than the most expensive month, which is December (based on the last 12 months).
  • If you have the time, taking a 1-stop flight through Las Vegas Harry Reid Intl Airport (LAS) can be cheaper than flying direct. The cheapest layover option averages $287 round-trip on this route - about $16 less than direct flights (based on the last 12 months).
  • If you're arriving late at night and need somewhere to stay, check out these hotels close to Ontario Airport.
    - Azure Hotel & Suites, Trademark Collection by Wyndham
    - La Quinta Inn & Suites by Wyndham Ontario Airport
    - Holiday Inn Ontario Airport By IHG
  • 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?

 
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

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Wednesday

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Thursday

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Friday

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Saturday

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Sunday

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Direct returns

Ontario to San Jose

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Tuesday

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Wednesday

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Thursday

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Friday

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

Information on your arrival and departure airports