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
$127
Typical prices: $222-$410
Frontier
Mon 11/12Sun 11/25
SJC - ONT • 1 stop
Cheapest non-stop
$171
Typical prices: $217-$404
Southwest
Wed 11/21Thu 11/22
SJC - ONT • Non-stop
Nonstop flights
You can fly direct with Southwest. Average duration is 1h 19m
Direct flights
+1
Direct flights
+1
When to book
in advance
Our data shows that travelers who book at least 5 weeks in advance save around 65% compared to booking last minute.
Insights
Insights
When to travel
Cheapest • 21% price drop
Most popular
Good to know
+1
Good to know
+1
Top layover airports
Cheapest • Avg $287 (round-trip)
Shortest trip • 5h 44m (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

Thu, Nov 12 - Wed, Nov 25
Frontier Logo
2:41 pm - 11:16 amSJC  San Jose-ONT Ontario
20h 35m1 stop Las Vegas Harry Reid Intl
Frontier Logo
10:55 am - 3:30 pmONT  Ontario-SJC San Jose
4h 35m1 stop Las Vegas Harry Reid Intl
$127Frontier
Mon, Nov 9 - Wed, Nov 11
Southwest Logo
7:10 pm - 11:40 pmSJC  San Jose-ONT Ontario
4h 30m1 stop Las Vegas Harry Reid Intl
Southwest Logo
7:05 am - 8:25 amONT  Ontario-SJC San Jose
1h 20mnonstop
$127Southwest
Wed, Nov 18 - Mon, Nov 23
Southwest Logo
2:05 pm - 8:40 pmSJC  San Jose-ONT Ontario
6h 35m1 stop Las Vegas Harry Reid Intl
Southwest Logo
10:35 am - 11:50 amONT  Ontario-SJC San Jose
1h 15mnonstop
$127Southwest
Fri, Nov 6 - Fri, Nov 13
Southwest Logo
6:30 am - 7:45 amSJC  San Jose-ONT Ontario
1h 15mnonstop
Southwest Logo
12:10 pm - 4:15 pmONT  Ontario-SJC San Jose
4h 05m1 stop Phoenix Sky Harbor Intl
$127Southwest
Mon, Oct 26 - Thu, Oct 29
Frontier Logo
9:02 pm - 9:40 amSJC  San Jose-ONT Ontario
12h 38m1 stop Las Vegas Harry Reid Intl
Frontier Logo
8:35 pm - 1:46 pmONT  Ontario-SJC San Jose
17h 11m1 stop Las Vegas Harry Reid Intl
$136Frontier
Mon, Nov 2 - Wed, Nov 4
Frontier Logo
2:41 pm - 9:40 amSJC  San Jose-ONT Ontario
18h 59m1 stop Las Vegas Harry Reid Intl
Frontier Logo
5:07 pm - 1:46 pmONT  Ontario-SJC San Jose
20h 39m1 stop Las Vegas Harry Reid Intl
$143Frontier
Sun, Nov 22 - Mon, Nov 23
Frontier Logo
4:15 pm - 7:36 pmSJC  San Jose-ONT Ontario
3h 21m1 stop Las Vegas Harry Reid Intl
Frontier Logo
8:15 am - 3:30 pmONT  Ontario-SJC San Jose
7h 15m1 stop Las Vegas Harry Reid Intl
$152Frontier
Sat, Oct 31 - Sat, Nov 14
American Airlines Logo
12:59 pm - 6:43 pmSJC  San Jose-ONT Ontario
5h 44m1 stop Phoenix Sky Harbor Intl
American Airlines Logo
6:30 am - 12:12 pmONT  Ontario-SJC San Jose
5h 42m1 stop Phoenix Sky Harbor Intl
$235American Airlines
Thu, Nov 5 - Sat, Nov 7
American Airlines Logo
6:00 am - 12:42 pmSJC  San Jose-ONT Ontario
6h 42m1 stop Phoenix Sky Harbor Intl
American Airlines Logo
6:30 am - 12:12 pmONT  Ontario-SJC San Jose
5h 42m1 stop Phoenix Sky Harbor Intl
$235American Airlines
Sat, Dec 12 - Tue, Dec 15
American Airlines Logo
10:04 am - 4:20 pmSJC  San Jose-ONT Ontario
6h 16m1 stop Phoenix Sky Harbor Intl
American Airlines Logo
6:30 am - 12:15 pmONT  Ontario-SJC San Jose
5h 45m1 stop Phoenix Sky Harbor Intl
$235American Airlines
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 with more confidence.

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

Round-trip flights from San Jose to Ontario typically range from $222 to $410. The lowest price found in the past 5 days was $127, on Frontier.

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

Based on deals KAYAK users found in the last 12 months, Thursday is the cheapest day of the week to fly from San Jose to Ontario. It’s 8% cheaper than the average day, while Tuesday is the most expensive, with prices 20% higher.

What’s the cheapest month to fly from San Jose to Ontario?

•September is the cheapest month to fly from San Jose to Ontario at $235 round-trip.
•December ($329) and July ($329) are the most expensive months.
•The price difference between flying in the cheapest and most expensive months is 40% on average.
This is based on KAYAK aggregated and averaged internal data over the past 12 months.

When are flights from San Jose to Ontario the cheapest?

Flights from San Jose to Ontario are cheapest 5 weeks before departure. Booking in this window typically costs about 65% 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
Beat the crowds with an average 13% drop in travelers.
The most popular month to fly with an average 18% increase in travelers.
One-way 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 answers about this route, including flight times, airports, airlines and booking tips.

  • 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 6:10 am and lands at 7:29 am
    • Latest: departs at 10:20 pm and lands at 11:39 pm.

    The flight takes about 1h 19m.

  • 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 long is a flight from San Jose to Ontario?

    A nonstop flight from San Jose to Ontario takes 1h 19m, 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 much should I expect to pay for a San Jose to Ontario flight?

    Round-trip flights from San Jose to Ontario range from $222 to $410, with an average of $297 over the past 12 months. Anything below $222 counts as a good deal.

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

    Last-minute fares on this route (booked within two weeks of departure) run 92% above the $297 route average. Book 5 weeks before departure for the lowest fares.

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

    On this route, nonstop and layover fares are close on average, with nonstop at $296 round-trip and layover options via Las Vegas Harry Reid Intl (LAS) at $287.

  • 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.

  • 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%.

  • 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.

  • 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 $78, which is 56% below the typical average for this route.

  • 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

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

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

    • Las Vegas Harry Reid Intl (LAS) - 50% of one-stop connections
    • Phoenix Sky Harbor Intl (PHX) - 33% of one-stop connections
    • Denver Intl (DEN) - 17% of one-stop connections

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

    Yes. Flexible dates can save you up to 24% on flights from San Jose to Ontario. Thursday is the cheapest departure day at $275 round-trip on average, while Tuesday is the most expensive at $359, a difference of $84.

    KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

  • What airlines fly from San Jose to Ontario?

    Only Southwest operates flights between San Jose and Ontario.

  • 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 44m, compared with 7h 04m via Denver Intl (DEN) and 19h 34m via Las Vegas Harry Reid Intl (LAS).

  • What popular places can I visit in Ontario?

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

  • 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.

  • 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 always check the fare details before booking.

  • 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.

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 are flexible, aim for a Thursday departure and avoid flying on Tuesday. On this route, Thursday flights average $275, about $84 less than Tuesday fares (23% savings) based on the last 12 months.
  • For the best chance at a low fare, aim to book around 5 weeks before you fly. On this route, that window historically saves about 65% 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 $235 round-trip in that month - typically $94 less than the most expensive month, which is May (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 $9 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
    • Ontario Airport Inn
  • 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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Tuesday

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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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See more direct flights

Direct returns

Ontario to San Jose

Monday

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Tuesday

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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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See more direct flights

More options for your flight from San Jose to Ontario

Complete your trip to Ontario with a hotel stay or car rental