HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
San Jose

$50+ Cheap flights from Ontario to San Jose (ONT - SJC)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 4/1. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — SJC
feb. 25 — mar. 41
mar. 2/25
mar. 3/4
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Ontario to San Jose with Cheapflights

1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”
2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.
3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

The best prices from Ontario to San Jose are usually found in July or August, booked 6 days in advance, depart on a Saturday or Friday and return on a Tuesday

Cheap flight deals from Ontario to San Jose

Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to San Jose (SJC). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated febrero 20, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$100
(Frontier)

One-way from

$50
(Cheapflightsfares)

Popular in

January

Cheapest in

July

Average price

$257

Good round-trip deal

$223 or less

Good one-way deal

$83 or less
Provider with most accurate pricing for Ontario-San Jose flight deals.
Search Deals
Provider most trusted by Cheapflights users for Ontario-San Jose flights.
Search Deals
From Ontario to San Jose
Search Deals
One-way flight from Ontario to San Jose
Search Deals
Highest demand for flights based on searches. 26% potential increase in price ($69 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($8 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 2025
Search Deals
Price to beat on a round-trip flight from Ontario to San Jose.
Search Deals
Price to beat on a one-way flight from Ontario to San Jose.
Search Deals

Find flight deals from Ontario to San Jose

Cheapest flights from Ontario to San Jose
Explore the most affordable flight options available from Ontario to San Jose. Find the lowest fares from popular airlines and budget airlines, with prices last updated on febrero 20, 2025.

This Frontier deal was found by Cheapflights users on 2/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 3/62:43 pmONT - SJC
1 stop4h 49mFrontier
mié. 3/124:03 pmSJC - ONT
1 stop8h 01mFrontier
Deal found 2/19$100
This Southwest deal was found by Cheapflights users on 2/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 4/218:15 pmONT - SJC
Nonstop1h 10mSouthwest
mar. 4/222:20 pmSJC - ONT
Nonstop1h 15mSouthwest
Deal found 2/19$117
This Alaska Airlines deal was found by Cheapflights users on 2/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 3/196:00 amONT - SJC
1 stop10h 40mAlaska Airlines
sáb. 3/228:50 pmSJC - ONT
1 stop13h 49mAlaska Airlines
Deal found 2/20$293
This American Airlines deal was found by Cheapflights users on 2/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 3/512:50 pmONT - SJC
1 stop5h 59mAmerican Airlines
mié. 3/126:00 amSJC - ONT
1 stop5h 59mAmerican Airlines
Deal found 2/19$304
This Delta deal was found by Cheapflights users on 2/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 5/227:00 amONT - SJC
1 stop10h 48mDelta
dom. 5/2510:30 amSJC - ONT
1 stop12h 10mDelta
Deal found 2/19$409

Find flights from Ontario to San Jose within your budget

Customize your flight search to find flights from Ontario to San Jose that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated febrero 20, 2025.

Fly from

Ontario

Fly to

San Jose

Route

Depart

Return

Price

OntarioSan Jose

ONT - SJC

ONTSJC

Ontario

jue. 3/6

2:43 pm-7:32 pm

1 stop4h 49m

San Jose

mié. 3/12

4:03 pm-12:04 am

1 stop8h 01m

$100

OntarioSan Jose

ONT - SJC

ONTSJC

Ontario

lun. 4/21

8:15 pm-9:25 pm

Nonstop1h 10m

San Jose

mié. 4/23

6:55 am-8:10 am

Nonstop1h 15m

$117

OntarioSan Jose

ONT - SJC

ONTSJC

Ontario

mié. 3/19

6:00 am-4:40 pm

1 stop10h 40m

San Jose

sáb. 3/22

8:50 pm-10:39 am

1 stop13h 49m

$293

OntarioSan Jose

ONT - SJC

ONTSJC

Ontario

mié. 3/5

12:50 pm-6:49 pm

1 stop5h 59m

San Jose

mié. 3/12

6:00 am-11:59 am

1 stop5h 59m

$304

OntarioSan Jose

ONT - SJC

ONTSJC

Ontario

mié. 5/21

7:00 am-5:48 pm

1 stop10h 48m

San Jose

mar. 5/27

10:30 am-11:45 pm

2 stops13h 15m

$430

OntarioSan Jose

ONT - SJC

ONTSJC

Ontario

mar. 4/1

2:43 pm-6:28 pm

1 stop3h 45m

$50

OntarioSan Jose

ONT - SJC

ONTSJC

Ontario

mar. 4/15

7:00 pm-8:10 pm

Nonstop1h 10m

$59

OntarioSan Jose

ONT - SJC

ONTSJC

Ontario

mar. 4/22

6:00 am-2:46 pm

1 stop8h 46m

$111

OntarioSan Jose

ONT - SJC

ONTSJC

Ontario

mié. 3/19

5:40 am-1:54 pm

1 stop8h 14m

$112

OntarioSan Jose

ONT - SJC

ONTSJC

Ontario

mié. 3/19

10:18 am-6:59 pm

2 stops8h 41m

$168

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/19

Showing 1-10 of 12 results
1
2

Compare providers for flights from Ontario to San Jose

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Ontario to San Jose in February.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
PricelinePrice Accuracy1 starTrust Score*3 stars
CheapOairPrice Accuracy1 starTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Ontario-San Jose flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Ontario-San Jose flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Ontario-San Jose flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Ontario-San Jose flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Ontario-San Jose flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Ontario to San Jose

Have a flexible travel schedule? Discover the best time to fly to San Jose from Ontario with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Travel insights for flights from Ontario to San Jose

Get recent, data-driven insights about flights from Ontario to San Jose including ideal travel times, pricing trends, and more.

How far ahead should I book a flight from Ontario to San Jose?

Use this chart to determine the optimal time to book a round-trip flight from Ontario to San Jose. Price data was last updated on February 14, 2025.

Booking 6 days in advance of your planned departure date is, on average, the best time to get cheap flights from Ontario to San Jose. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

What is the cheapest month to book a flight from Ontario to San Jose?

Currently, September is the cheapest month in which you can book a flight from Ontario to San Jose (average of $255). Flying from Ontario to San Jose in June is currently the most expensive (average of $371). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from ONT to SJC?

Find hourly flight availability from Ontario to San Jose. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated febrero 20, 2025.

It’s optimal to fly from Ontario to San Jose in the evening. By choosing this option you can save up to 16% on the cost of your flight, compared to a flight in the morning.

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

Use this chart to determine the cheapest time to fly round-trip from Ontario to San Jose. Price data was last updated on February 16, 2025.

Travelers seeking maximum savings on their Ontario to San Jose flight should consider departing on Thursday evenings when fares are most often at their lowest. Wednesday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

Rainfall in San Jose by month

Plan your trip to San Jose by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in San Jose ranges from 0.0 - 3.1 inches per month. January is typically the wettest month, when rainfall can reach 3.1 in. July is typically the driest time to visit San Jose when rainfall is around 0.0 in.

Temperature in San Jose by month

Plan your trip to San Jose by taking into account the average temperature totals by month.

If weather is an important factor for your trip to San Jose, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 69.8 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 50.0 F).

Reviews of airlines servicing San Jose

Get insights into the airlines that provide service to San Jose. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to San Jose. Reviews last updated febrero 20, 2025.
To help decide which airline to fly from Ontario to San Jose, see what other customers have to say about Southwest, Alaska Airlines and Delta. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.1
Very good
4,411 reviews

Entertainment

7.6

Boarding

8.2

Overall

8.1

Comfort

8.1

Food

7.1

Crew

8.7

Reviews

1 / 20

8.0
Excellent

Christine,Aug 2024

DEN - LGB

No issues. I needed pre boarding and I was able to get it without issue

Southwest
8.1
Very good
4,411 reviews
Southwest
8.1
Very good
4,411 reviews

Entertainment

7.6

Boarding

8.2

Overall

8.1

Comfort

8.1

Food

7.1

Crew

8.7

Reviews

1 / 20

8.0
Excellent

Christine,Aug 2024

DEN - LGB

No issues. I needed pre boarding and I was able to get it without issue

Alaska Airlines
8.0
Very good
9,697 reviews
Southwest
8.1
Very good
4,411 reviews

Entertainment

7.6

Boarding

8.2

Overall

8.1

Comfort

8.1

Food

7.1

Crew

8.7

Reviews

1 / 20

8.0
Excellent

Christine,Aug 2024

DEN - LGB

No issues. I needed pre boarding and I was able to get it without issue

Delta
8.0
Very good
8,219 reviews
Southwest
8.1
Very good
4,411 reviews

Entertainment

7.6

Boarding

8.2

Overall

8.1

Comfort

8.1

Food

7.1

Crew

8.7

Reviews

1 / 20

8.0
Excellent

Christine,Aug 2024

DEN - LGB

No issues. I needed pre boarding and I was able to get it without issue

United Airlines
7.4
Good
8,765 reviews
Southwest
8.1
Very good
4,411 reviews

Entertainment

7.6

Boarding

8.2

Overall

8.1

Comfort

8.1

Food

7.1

Crew

8.7

Reviews

1 / 20

8.0
Excellent

Christine,Aug 2024

DEN - LGB

No issues. I needed pre boarding and I was able to get it without issue

American Airlines
7.2
Good
10,000 reviews
Southwest
8.1
Very good
4,411 reviews

Entertainment

7.6

Boarding

8.2

Overall

8.1

Comfort

8.1

Food

7.1

Crew

8.7

Reviews

1 / 20

8.0
Excellent

Christine,Aug 2024

DEN - LGB

No issues. I needed pre boarding and I was able to get it without issue

Related info for your journey

Find useful and relevant information for your journey from Ontario to San Jose. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airports do I use to fly from Ontario to San Jose?

    San Jose is the airport most travelers will use when flying to San Jose from Ontario. Booking flights from Ontario (ONT) to San Jose (SJC) should be relatively easy as there are 2 daily flights to San Jose from 6 different airlines. 1h 10m is how long a flight from Ontario to San Jose will take if you book a nonstop flight.

  • How popular is this Ontario to San Jose flight route?

    The Ontario to San Jose flight path was viewed by 14 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

  • What are the cheapest airlines flying from Ontario to San Jose round-trip?

    Currently priced at $100, Frontier will fly you from Ontario to San Jose and back. In addition to Frontier, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Southwest and Alaska Airlines - these airlines can fly you to your destination from $117 and $292, respectively. Frontier is currently priced 48% below the average price you’ll pay for this route.

  • What are the cheapest airlines to fly from Ontario to San Jose one-way?

    One-way options have recently been found by users for as low as $50 on Frontier. Other airlines that offer cheap prices include Southwest from $59 and Alaska Airlines from $111 one-way.

  • What are the cheapest flights from Ontario to San Jose?

    Looking for the cheapest flight from Ontario to San Jose? While on average our users pay $214, our data indicates the cheapest price to be $69. The most popular route (Ontario - San Jose), is priced around $100.

  • Can I find deals for flights from Ontario to San Jose that include hotel bookings?

    Yes. In addition to deals on Ontario to San Jose flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ontario to San Jose?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to San Jose.

  • Can I find deals for business class flights from Ontario to San Jose?

    Yes. Cheapflights offers flight deals from Ontario to San Jose by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Ontario to San Jose?

    Currently, September is the cheapest month in which you can book a flight from Ontario to San Jose (average of $255). Flying from Ontario to San Jose in June is currently the most expensive (average of $371). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Ontario to San Jose

See prices for flight routes from nearby airports that may be better suited for you.
San Francisco to Las Vegas flights
San Jose to Las Vegas flights
San Francisco to Los Angeles flights
Los Angeles to Las Vegas flights
Santa Ana to Las Vegas flights
Oakland to Las Vegas flights
Burbank to Las Vegas flights
Oakland to Los Angeles flights
Los Angeles to San Francisco flights
San Jose to Los Angeles flights
San Francisco to Ontario flights
Los Angeles to Oakland flights
Los Angeles to San Jose flights
Oakland to Santa Ana flights
San Francisco to Santa Ana flights
Ontario to Las Vegas flights
Ontario to San Francisco flights
Santa Ana to San Francisco flights
Santa Ana to Oakland flights
San Francisco to Burbank flights
San Jose to San Diego flights
San Francisco to San Diego flights
San Diego to Las Vegas flights
Los Angeles to Sacramento flights
Burbank to San Francisco flights
Oakland to Burbank flights
Sacramento to Los Angeles flights
Oakland to San Diego flights
Burbank to Oakland flights
Sacramento to Las Vegas flights
Los Angeles to Reno flights
San Jose to Ontario flights
San Diego to San Francisco flights
San Francisco to Palm Springs flights
San Jose to Santa Ana flights
Sacramento to San Diego flights
Santa Ana to San Jose flights
San Diego to San Jose flights
Las Vegas to Los Angeles flights
Fresno to Las Vegas flights
San Diego to Oakland flights
Burbank to Sacramento flights
Santa Ana to Sacramento flights
Sacramento to Ontario flights
Santa Rosa to Las Vegas flights
San Diego to Sacramento flights
Ontario to Sacramento flights
Stockton to Las Vegas flights
San Jose to Burbank flights

Top 6 airlines flying from Ontario to San Jose

Discover the top 6 airlines that operate flights from Ontario to San Jose. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated febrero 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$26Average$100FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$42Average$127FlexibilityNo cancel feeOn-time65%
Breeze AirwaysCheapest$78Average$101FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$114Average$370FlexibilityNo cancel feeOn-time75%
SouthwestCheapest$164Average$262FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$273Average$486FlexibilityNo cancel feeOn-time71%
100% Free
Cheapflights is completely free to use, so you can start saving the moment you arrive.
Book with Flexibility
Our users can plan ahead with confidence and find flights with no change fees
Travel Smart
Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.