How many flights depart from Ontario to San Jose, California on average per day?

The number of flights available between Ontario and San Jose, California is 2 per day as of September 2026. The most frequent departure time is 6:00, with 53% of daily flights leaving at midday.

What is the cheapest airline that flies from Ontario to San Jose?

Southwest is the most popular carrier operating from Ontario to San Jose

How many flights depart from Ontario to San Jose, California on average per week?

As of September 2026, 15 flights take off from Ontario and land in San Jose, California each week. The most common flight departure day for this route is Mon, with 27% of weekly flights taking off on this day.

When did momondo last update prices for flights from Ontario Airport to San Jose Airport?

Prices for flights from Ontario Airport to San Jose Airport are refreshed on a daily basis.

How old do you have to be to fly from Ontario Airport to San Jose Airport?

The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and stopovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Ontario Airport to San Jose Airport.

What documentation or ID do you need to fly to San Jose Airport?

The required travel and health documents for your San Jose Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's licence and a passport valid for six months after your intended arrival at San Jose Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

R959 Cheap Flights from Ontario to San Jose, California in 2026/27

Find the cheapest flights from Ontario to San Jose

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One-way

Last minute

Direct

Cheap return flights

Enter your travel dates to find the best prices.

10:35 - 11:50ONT Ontario-SJC San Jose

1h 15mdirect

16:35 - 17:50SJC San Jose-ONT Ontario

1h 15mdirect

R1 901Southwest

Thu, Nov 5 - Tue, Nov 10

5:35 - 9:00ONT Ontario-SJC San Jose

3h 25m1 stop Las Vegas Harry Reid Intl

19:40 - 21:05SJC San Jose-ONT Ontario

1h 25mdirect

R2 063Southwest

Thu, Nov 5 - Tue, Nov 10

16:00 - 22:25ONT Ontario-SJC San Jose

6h 25m2 stops Phoenix Sky Harbor Intl San Diego

11:20 - 12:40SJC San Jose-ONT Ontario

1h 20mdirect

R2 145Southwest

Mon, Nov 9 - Thu, Nov 12

21:30 - 7:20ONT Ontario-SJC San Jose

9h 50m1 stop Las Vegas Harry Reid Intl

19:30 - 20:55SJC San Jose-ONT Ontario

1h 25mdirect

R2 161Southwest

Mon, Oct 12 - Tue, Oct 13

17:20 - 23:55ONT Ontario-SJC San Jose

6h 35m1 stop Phoenix Sky Harbor Intl

11:45 - 16:10SJC San Jose-ONT Ontario

4h 25m1 stop Phoenix Sky Harbor Intl

R2 226Southwest

Thu, Nov 5 - Tue, Nov 10

21:30 - 7:20ONT Ontario-SJC San Jose

9h 50m1 stop Las Vegas Harry Reid Intl

13:35 - 19:50SJC San Jose-ONT Ontario

6h 15m1 stop Phoenix Sky Harbor Intl

R2 307Southwest

Mon, Oct 12 - Tue, Oct 13

6:20 - 7:35ONT Ontario-SJC San Jose

1h 15mdirect

6:45 - 8:05SJC San Jose-ONT Ontario

1h 20mdirect

R2 340Southwest

Wed, Oct 14 - Fri, Oct 16

11:25 - 12:35ONT Ontario-SJC San Jose

1h 10mdirect

18:15 - 23:50SJC San Jose-ONT Ontario

5h 35m1 stop Phoenix Sky Harbor Intl

R2 502Southwest

Wed, Oct 14 - Fri, Oct 16

16:15 - 22:50ONT Ontario-SJC San Jose

6h 35m2 stops Las Vegas Harry Reid Intl Phoenix Sky Harbor Intl

20:25 - 21:45SJC San Jose-ONT Ontario

1h 20mdirect

R2 583Southwest

Wed, Oct 14 - Fri, Oct 16

17:20 - 22:20ONT Ontario-SJC San Jose

5h 00m1 stop Phoenix Sky Harbor Intl

16:45 - 23:00SJC San Jose-ONT Ontario

6h 15m1 stop Phoenix Sky Harbor Intl

R2 665Southwest

Fri, Nov 6 - Mon, Nov 9

Cheap last-minute flights

Enter your travel dates to find the best prices.

13:04 - 18:29ONT Ontario-SJC San Jose

5h 25m1 stop Phoenix Sky Harbor Intl

6:00 - 12:06SJC San Jose-ONT Ontario

6h 06m1 stop Phoenix Sky Harbor Intl

R8 985American Airlines

Mon, Sep 21 - Thu, Sep 24

11:00 - 12:10ONT Ontario-SJC San Jose

1h 10mdirect

16:35 - 17:55SJC San Jose-ONT Ontario

1h 20mdirect

R9 781Southwest

Sat, Sep 26 - Sat, Oct 3

14:40 - 21:30ONT Ontario-SJC San Jose

6h 50m1 stop Phoenix Sky Harbor Intl

12:25 - 13:40SJC San Jose-ONT Ontario

1h 15mdirect

R9 862Southwest

Fri, Sep 25 - Wed, Sep 30

13:04 - 18:29ONT Ontario-SJC San Jose

5h 25m1 stop Phoenix Sky Harbor Intl

6:00 - 12:06SJC San Jose-ONT Ontario

6h 06m1 stop Phoenix Sky Harbor Intl

R9 879American Airlines

Tue, Sep 22 - Thu, Sep 24

14:40 - 21:15ONT Ontario-SJC San Jose

6h 35m2 stops Phoenix Sky Harbor Intl Los Angeles Los Angeles

6:40 - 12:40SJC San Jose-ONT Ontario

6h 00m1 stop Las Vegas Harry Reid Intl

R9 944Southwest

Fri, Sep 25 - Wed, Sep 30

14:40 - 21:15ONT Ontario-SJC San Jose

6h 35m2 stops Phoenix Sky Harbor Intl Los Angeles Los Angeles

14:55 - 21:00SJC San Jose-ONT Ontario

6h 05m2 stops Santa Ana J. Wayne/Orange Cnty Phoenix Sky Harbor Intl

R10 285Southwest

Fri, Sep 25 - Wed, Sep 30

16:45 - 20:05ONT Ontario-SJC San Jose

3h 20m1 stop Las Vegas Harry Reid Intl

6:30 - 7:50SJC San Jose-ONT Ontario

1h 20mdirect

R11 065Southwest

Tue, Sep 22 - Thu, Sep 24

18:45 - 19:55ONT Ontario-SJC San Jose

1h 10mdirect

18:30 - 22:25SJC San Jose-ONT Ontario

3h 55m1 stop Phoenix Sky Harbor Intl

R11 130Southwest

Fri, Sep 25 - Sun, Sep 27

16:45 - 20:05ONT Ontario-SJC San Jose

3h 20m1 stop Las Vegas Harry Reid Intl

14:40 - 20:45SJC San Jose-ONT Ontario

6h 05m2 stops San Diego Phoenix Sky Harbor Intl

R11 146Southwest

Tue, Sep 22 - Thu, Sep 24

5:40 - 11:55ONT Ontario-SJC San Jose

6h 15m2 stops Las Vegas Harry Reid Intl San Diego

7:15 - 11:15SJC San Jose-ONT Ontario

4h 00m1 stop Phoenix Sky Harbor Intl

R11 211Southwest

Fri, Sep 25 - Sat, Sep 26

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Southwest flights from Ontario to San Jose, California

Our best Southwest deals on Ontario to San Jose, California flight tickets

Southwest

Nov 5

ONT10:35Ontario

1h 15m

SJC11:50San Jose

Nov 10

SJC16:35San Jose

1h 15m

ONT17:50Ontario

R1 901

Southwest

Nov 5

ONT5:35Ontario

3h 25m

1 stop

SJC9:00San Jose

Nov 10

SJC19:40San Jose

1h 25m

ONT21:05Ontario

R2 063

Southwest

Nov 9

ONT16:00Ontario

6h 25m

2 stops

SJC22:25San Jose

Nov 12

SJC11:20San Jose

1h 20m

ONT12:40Ontario

R2 145

American Airlines flights from Ontario to San Jose, California

Our best American Airlines deals on Ontario to San Jose, California flight tickets

American Airlines

Sept 21

ONT13:04Ontario

5h 25m

1 stop

SJC18:29San Jose

Sept 24

SJC6:00San Jose

6h 06m

1 stop

ONT12:06Ontario

R8 985

American Airlines

Sept 22

ONT13:04Ontario

5h 25m

1 stop

SJC18:29San Jose

Sept 24

SJC6:00San Jose

6h 06m

1 stop

ONT12:06Ontario

R9 879

American Airlines

Sept 29

ONT13:04Ontario

5h 25m

1 stop

SJC18:29San Jose

Oct 1

SJC6:00San Jose

6h 06m

1 stop

ONT12:06Ontario

R10 301

momondo Fare Finder

Use the filters below to find and compare flights from Ontario to San Jose, California that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

Fastest return journey

OntarioSan Jose

ONT Ontario - SJC San Jose

ONTSJC

Ontario

Thu 5/11

10:35-11:50

Nonstop1h 15m

San Jose

Tue 10/11

16:35-17:50

Nonstop1h 15m

R1 901

OntarioSan Jose

ONT Ontario - SJC San Jose

ONTSJC

Ontario

Thu 5/11

5:35-9:00

1 stop3h 25m

San Jose

Tue 10/11

19:40-21:05

Nonstop1h 25m

R2 063

OntarioSan Jose

ONT Ontario - SJC San Jose

ONTSJC

Ontario

Mon 9/11

16:00-22:25

2 stops6h 25m

San Jose

Thu 12/11

11:20-12:40

Nonstop1h 20m

R2 145

OntarioSan Jose

ONT Ontario - SJC San Jose

ONTSJC

Ontario

Mon 12/10

21:30-7:20

1 stop9h 50m

San Jose

Tue 13/10

19:30-20:55

Nonstop1h 25m

R2 161

OntarioSan Jose

ONT Ontario - SJC San Jose

ONTSJC

Ontario

Thu 5/11

17:20-23:55

1 stop6h 35m

San Jose

Tue 10/11

11:45-16:10

1 stop4h 25m

R2 226

OntarioSan Jose

ONT Ontario - SJC San Jose

ONTSJC

Ontario

Mon 12/10

21:30-7:20

1 stop9h 50m

San Jose

Tue 13/10

13:35-19:50

1 stop6h 15m

R2 307

OntarioSan Jose

ONT Ontario - SJC San Jose

ONTSJC

Ontario

Wed 14/10

6:20-7:35

Nonstop1h 15m

San Jose

Fri 16/10

6:45-8:05

Nonstop1h 20m

R2 340

OntarioSan Jose

ONT Ontario - SJC San Jose

ONTSJC

Ontario

Wed 14/10

11:25-12:35

Nonstop1h 10m

San Jose

Fri 16/10

18:15-23:50

1 stop5h 35m

R2 502

OntarioSan Jose

ONT Ontario - SJC San Jose

ONTSJC

Ontario

Wed 14/10

16:15-22:50

2 stops6h 35m

San Jose

Fri 16/10

20:25-21:45

Nonstop1h 20m

R2 583

OntarioSan Jose

ONT Ontario - SJC San Jose

ONTSJC

Ontario

Fri 6/11

17:20-22:20

1 stop5h 00m

San Jose

Mon 9/11

16:45-23:00

1 stop6h 15m

R2 665

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Ontario to San Jose, California

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

Other information

What is the typical price of a round-trip flight between Ontario and San Jose, California?

Prices are currently low for flights on this route.

Typical prices usually range from R2 941 to R9 261.
The lowest price recently found on this route was R1 901.

What is the cheapest month to fly to San Jose, California?

The month of November is another great option to travel to San Jose, California, with average flight prices from Ontario averaging around R4 533.

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

You are more likely to see cheaper flights to San Jose, California from Ontario when booking weeks ahead of your departure date. In general, you can expect to find flights to San Jose, California for around R6 013 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to San Jose, California from Ontario for as low as R3 656 on momondo.

How have Ontario to San Jose, California flight prices changed over time?

As of September 2026, prices for Ontario to San Jose, California flights are approximately 100% more expensive when compared to flights at the same time last year.

When to book flights from Ontario to San Jose, California

Are you open to changing your travel dates? Check out the ideal times to fly from Ontario to San Jose, California according to our flight data. Find out which month and days have the cheapest flights.

Estimated return price

Cheap Ontario to San Jose, California (ONT to SJC) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Ontario to San Jose, California

Best price found	R959
Direct flights	Every day
Airports in San Jose, California	1 airport

The best one-way flight to San Jose, California from Ontario in the past 72 hours is R959. The best return flight deal from Ontario to San Jose, California found on momondo in the last 72 hours is R1 901.

Direct flights go from Ontario to San Jose, California every day.

There is 1 airport in San Jose, California. From Ontario there are direct flights to San Jose (SJC).

Search flight deals

Frequently asked questions about flying from Ontario to San Jose, California

How far is Ontario to San Jose by plane?
San Jose is 527,5 km away from Ontario.
When did momondo last update prices for flights from Ontario Airport to San Jose Airport?
Prices for flights from Ontario Airport to San Jose Airport are refreshed on a daily basis.
How old do you have to be to fly from Ontario Airport to San Jose Airport?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and stopovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Ontario Airport to San Jose Airport.
What documentation or ID do you need to fly to San Jose Airport?
The required travel and health documents for your San Jose Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's licence and a passport valid for six months after your intended arrival at San Jose Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.
What is the most popular plane model from Ontario to San Jose, California?
Based on momondo bookings for this flight route, the most popular plane model on flight routes from Ontario to San Jose, California is Boeing 737 MAX 8 (22,75% of total bookings). The next most popular plane models are Boeing 737-800 Passenger/BBJ2 (winglets) (17,83%), Airbus A321neo (9,63%), and Boeing 737-800 (6,35%).

Why use momondo?

Why should I use momondo to find a flight deal from Ontario to San Jose?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to San Jose from Ontario.

Can I find flights from Ontario to San Jose with flexible booking policies on momondo?

Flights from Ontario to San Jose with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from Ontario to San Jose?

momondo helps you find the best flight between Ontario and San Jose by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

I’m not ready to book a flight from Ontario to San Jose right now. Can momondo alert me if prices change?

If you are simply researching potential flights to San Jose, momondo offers a useful price alert feature which will track prices for flights to San Jose from Ontario and alert you when they change.