Ontario

$49+ Cheap flights from San Jose to Ontario (SJC - ONT)

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 2/12. Fares are subject to change and may not be available on all flights or dates of travel.
SJC — ONT
ene. 27 — feb. 31
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The best prices from San Jose to Ontario are usually found in May or August, booked 29 days in advance, depart on a Friday or Wednesday and return on a Sunday

Cheap flight deals from San Jose to Ontario

Discover tips and strategies to find the most affordable flight options for your journey from San Jose (SJC) to Ontario (ONT). 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 enero 22, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$100
(Frontier)

One-way from

$49
(Mytrip)

Popular in

November

Cheapest in

May

Average price

$228

Good round-trip deal

$228 or less

Good one-way deal

$129 or less
Provider with most accurate pricing for San Jose-Ontario flight deals.
Provider most trusted by Cheapflights users for San Jose-Ontario flights.
From San Jose to Ontario
One-way flight from San Jose to Ontario
Highest demand for flights based on searches. 30% potential increase in price ($81 potential increase over avg. RT price).
Cheapest flight prices on average. 5% potential price decrease ($10 potential savings vs. average RT price).
Average for round-trip flights in January 2025
Price to beat on a round-trip flight from San Jose to Ontario.
Price to beat on a one-way flight from San Jose to Ontario.

Find flight deals from San Jose to Ontario

Cheapest flights from San Jose to Ontario
Explore the most affordable flight options available from San Jose to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on enero 22, 2025.

This Frontier deal was found by Cheapflights users on 1/22. 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.
mié. 2/194:03 pmSJC - ONT
1 stop8h 03mFrontier
jue. 2/2010:24 amONT - SJC
1 stop6h 22mFrontier
Deal found 1/22$100
This Southwest deal was found by Cheapflights users on 1/22. 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. 3/105:55 pmSJC - ONT
Nonstop1h 20mSouthwest
jue. 3/135:40 amONT - SJC
1 stop3h 20mSouthwest
Deal found 1/22$143
This Alaska Airlines deal was found by Cheapflights users on 1/22. 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.
mar. 4/158:34 amSJC - ONT
1 stop15h 25mAlaska Airlines
mié. 4/166:00 amONT - SJC
1 stop6h 08mAlaska Airlines
Deal found 1/22$282
This American Airlines deal was found by Cheapflights users on 1/22. 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.
jue. 2/136:00 amSJC - ONT
1 stop6h 07mAmerican Airlines
lun. 2/177:30 pmONT - SJC
1 stop13h 58mAmerican Airlines
Deal found 1/22$326
This Expedia deal was found by Cheapflights users on 1/22. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 1/287:00 amSJC - ONT
1 stop14h 40mMultiple Airlines
jue. 1/307:56 amONT - SJC
1 stop8h 23mMultiple Airlines
Deal found 1/22$451
This United Airlines deal was found by Cheapflights users on 1/22. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 4/158:30 amSJC - ONT
1 stop12h 12mUnited Airlines
mié. 4/163:55 pmONT - SJC
2 stops19h 52mUnited Airlines
Deal found 1/22$488

Find flights from San Jose to Ontario within your budget

Customize your flight search to find flights from San Jose to Ontario 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 enero 22, 2025.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

San JoseOntario

SJC - ONT

SJCONT

San Jose

mié. 2/19

4:03 pm-12:06 am

1 stop8h 03m

Ontario

jue. 3/6

10:44 am-5:06 pm

1 stop6h 22m

$100

San JoseOntario

SJC - ONT

SJCONT

San Jose

lun. 3/10

5:55 pm-7:15 pm

Nonstop1h 20m

Ontario

jue. 3/13

5:40 am-9:00 am

1 stop3h 20m

$143

San JoseOntario

SJC - ONT

SJCONT

San Jose

mar. 4/15

8:34 am-11:59 pm

1 stop15h 25m

Ontario

mié. 4/16

6:00 am-12:08 pm

1 stop6h 08m

$282

San JoseOntario

SJC - ONT

SJCONT

San Jose

jue. 2/13

6:00 am-12:07 pm

1 stop6h 07m

Ontario

lun. 2/17

7:30 pm-9:28 am

1 stop13h 58m

$326

San JoseOntario

SJC - ONT

SJCONT

San Jose

mar. 4/15

8:30 am-8:42 pm

1 stop12h 12m

Ontario

mié. 4/16

3:55 pm-11:47 am

2 stops19h 52m

$488

San JoseOntario

SJC - ONT

SJCONT

San Jose

mié. 2/12

4:03 pm-12:06 am

1 stop8h 03m

$49

San JoseOntario

SJC - ONT

SJCONT

San Jose

mié. 4/30

6:55 am-8:10 am

Nonstop1h 15m

$69

San JoseOntario

SJC - ONT

SJCONT

San Jose

sáb. 3/1

6:00 am-12:07 pm

1 stop6h 07m

$131

San JoseOntario

SJC - ONT

SJCONT

San Jose

mar. 4/22

12:55 pm-8:29 pm

1 stop7h 34m

$141

San JoseOntario

SJC - ONT

SJCONT

San Jose

mar. 3/25

2:34 pm-10:22 pm

1 stop7h 48m

$142

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/22

Showing 1-10 of 11 results
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Compare providers for flights from San Jose to Ontario

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 San Jose to Ontario in January.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
PricelinePrice Accuracy2 starsTrust Score*3 stars
Kiwi.comPrice Accuracy3 starsTrust 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 San Jose-Ontario flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on San Jose-Ontario flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from San Jose-Ontario flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on San Jose-Ontario 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 San Jose-Ontario 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 San Jose to Ontario

Have a flexible travel schedule? Discover the best time to fly to Ontario from San Jose 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 San Jose to Ontario

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

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

Use this chart to determine the optimal time to book a round-trip flight from San Jose to Ontario. Price data was last updated on January 17, 2025.

To ensure you get the cheapest price possible for a flight from San Jose to Ontario, you should look to book at least 29 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

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

Currently, August is the cheapest month in which you can book a flight from San Jose to Ontario (average of $246). Flying from San Jose to Ontario in March is currently the most expensive (average of $310). 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 SJC to ONT?

Find hourly flight availability from San Jose to Ontario. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated enero 22, 2025.

It’s optimal to fly from San Jose to Ontario at noon. By choosing this option you can save up to 25% on the cost of your flight, compared to a flight in the afternoon.

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

Use this chart to determine the cheapest time to fly round-trip from San Jose to Ontario. Price data was last updated on January 21, 2025.

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

Rainfall in Ontario by month

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

In terms of precipitation, rainfall in Ontario ranges from 0.1 - 3.4 inches per month. February is typically the wettest month, when rainfall can reach 3.4 in. June is typically the driest time to visit Ontario when rainfall is around 0.1 in.

Temperature in Ontario by month

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

If weather is an important factor for your trip to Ontario, use this chart to help with planning. For those seeking warmer temperatures, August is the ideal time of year to visit, when temperatures reach an average of 78.8 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 53.6 F).

Reviews of airlines servicing Ontario

Get insights into the airlines that provide service to Ontario. 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 Ontario. Reviews last updated enero 22, 2025.
Read through reviews of airlines operating flights from San Jose to Ontario, such as American Airlines, Frontier and Southwest. 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.
8.1
Very good
4,654 reviews

Boarding

8.2

Entertainment

7.7

Crew

8.7

Comfort

8.1

Food

7.2

Overall

8.1

Reviews

1 / 10

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

8.1
Very good
4,654 reviews
8.1
Very good
4,654 reviews

Boarding

8.2

Entertainment

7.7

Crew

8.7

Comfort

8.1

Food

7.2

Overall

8.1

Reviews

1 / 10

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

8.0
Very good
9,707 reviews
8.1
Very good
4,654 reviews

Boarding

8.2

Entertainment

7.7

Crew

8.7

Comfort

8.1

Food

7.2

Overall

8.1

Reviews

1 / 10

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

8.0
Very good
8,512 reviews
8.1
Very good
4,654 reviews

Boarding

8.2

Entertainment

7.7

Crew

8.7

Comfort

8.1

Food

7.2

Overall

8.1

Reviews

1 / 10

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

7.4
Good
8,975 reviews
8.1
Very good
4,654 reviews

Boarding

8.2

Entertainment

7.7

Crew

8.7

Comfort

8.1

Food

7.2

Overall

8.1

Reviews

1 / 10

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

7.2
Good
10,000 reviews
8.1
Very good
4,654 reviews

Boarding

8.2

Entertainment

7.7

Crew

8.7

Comfort

8.1

Food

7.2

Overall

8.1

Reviews

1 / 10

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 San Jose to Ontario. 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 San Jose to Ontario?

    To fly from San Jose to Ontario, you need to book a flight from San Jose (SJC) to Ontario (ONT). Nonstop flights to Ontario from San Jose take 1h 15m on average. When it comes time to book airfare, you have a few options: there are 3 outbound flights from San Jose to Ontario offered by 4 different airlines.

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

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

    According to our current data, Frontier ($100), Southwest ($143), and Alaska Airlines ($282) offers the cheapest pricing from San Jose to Ontario. Frontier is 46% cheaper than the average price of flights available within the next 90 days to this destination.

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

    The cheapest airline one-way is Frontier, with whom users have recently found tickets for as low as $49. However, be on the lookout for offers from Southwest and American Airlines, as they are both options that can get you from San Jose to Ontario for a low price.

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

    Looking at all options, your cheapest flight can be booked for $63. While the most popular route (San Jose - Ontario) can be booked for $114 on average our data indicates $285 when flying from San Jose to Ontario.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from San Jose to Ontario 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 San Jose to Ontario?

    Currently, August is the cheapest month in which you can book a flight from San Jose to Ontario (average of $246). Flying from San Jose to Ontario in March is currently the most expensive (average of $310). 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

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Alternative routes for San Jose to Ontario

See prices for flight routes from nearby airports that may be better suited for you.

Top 4 airlines flying from San Jose to Ontario

Discover the top 4 airlines that operate flights from San Jose to Ontario. 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 enero 22, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$36Average$89FlexibilityNo cancel feeOn-time65%
FrontierCheapest$38Average$102FlexibilityNo cancel feeOn-time62%
Alaska AirlinesCheapest$138Average$276FlexibilityNo cancel feeOn-time75%
SouthwestCheapest$194Average$279FlexibilityNo cancel feeOn-time63%
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