HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Ontario

$160+ Cheap flights from San José (SJO) to Ontario (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 5/17. Fares are subject to change and may not be available on all flights or dates of travel.
SJO — ONT
Apr 22 — Apr 291
Tue 4/22
Tue 4/29
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from San José to Ontario 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.

Cheapflights Tip: The best prices from San José Juan Santamaria Intl to Ontario are usually found in September or May, booked 89 days in advance, depart on a Tuesday or Friday and return on a Monday

Cheap flight deals from San José to Ontario

Discover tips and strategies to find the most affordable flight options for your journey from San José (SJO) 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 April 17, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$329
(United Airlines)

One-way from

$160
(CheapOair)

Popular in

October

Cheapest in

September

Average price

$531
Provider with most accurate pricing for San José Juan Santamaria Intl-Ontario flight deals.
Search Deals
Provider most trusted by Cheapflights users for San José Juan Santamaria Intl-Ontario flights.
Search Deals
From San José Juan Santamaria Intl to Ontario
Search Deals
One-way flight from San José Juan Santamaria Intl to Ontario
Search Deals
Highest demand for flights based on searches. 2% potential increase in price ($12 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($13 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 2025
Search Deals

Find flight deals from San José to Ontario

Cheapest flights from San José to Ontario
Explore the most affordable flight options available from San José to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 17, 2025.

This United Airlines deal was found by Cheapflights users on 4/17. 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.
Sat 4/266:35 amSJO - ONT
1 stop15h 07mUnited Airlines
Tue 4/291:35 pmONT - SJO
2 stops19h 36mUnited Airlines
Deal found 4/17$329
This American Airlines deal was found by Cheapflights users on 4/17. 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.
Wed 8/137:40 amSJO - ONT
1 stop16h 49mAmerican Airlines
Fri 8/228:01 pmONT - SJO
2 stops14h 14mAmerican Airlines
Deal found 4/17$411
This Cheapflightsfares deal was found by Cheapflights users on 4/17. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/175:05 amSJO - ONT
1 stop17h 50mAvianca
Sat 5/2411:25 pmONT - SJO
1 stop10h 50mAvianca
Deal found 4/17$490
This Delta deal was found by Cheapflights users on 4/17. 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.
Fri 7/251:08 pmSJO - ONT
1 stop10h 21mDelta
Mon 8/2510:59 pmONT - SJO
1 stop11h 49mDelta
Deal found 4/17$533
This CheapOair deal was found by Cheapflights users on 4/17. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/229:35 amSJO - ONT
1 stop13h 20mMultiple Airlines
Mon 6/231:09 amONT - SJO
1 stop21h 05mMultiple Airlines
Deal found 4/17$608
This Air Canada deal was found by Cheapflights users on 4/17. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/198:00 amSJO - ONT
2 stops25h 38mAir Canada
Wed 10/226:30 pmONT - SJO
2 stops27h 25mAir Canada
Deal found 4/17$672

Cheapflights Fare Finder

Customize your flight search to find flights from San José 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 April 17, 2025.
Use the filters below to find and compare flights from San José to Ontario that are best for you.

Fly from

San José

Fly to

Ontario

Route

Depart

Return

Price

San JoséOntario

SJO - ONT

SJOONT

San José Juan Santamaria Intl

Tue 5/13

7:55 am-8:34 pm

2 stops13h 39m

Ontario

Sun 5/25

6:00 am-7:15 am

1 stop24h 15m

$331

San JoséOntario

SJO - ONT

SJOONT

San José Juan Santamaria Intl

Wed 8/13

7:40 am-11:29 pm

1 stop16h 49m

Ontario

Fri 8/22

8:01 pm-11:15 am

2 stops14h 14m

$411

San JoséOntario

SJO - ONT

SJOONT

San José Juan Santamaria Intl

Sat 5/17

5:05 am-9:55 pm

1 stop17h 50m

Ontario

Sat 5/24

11:25 pm-11:15 am

1 stop10h 50m

$490

San JoséOntario

SJO - ONT

SJOONT

San José Juan Santamaria Intl

Fri 7/25

1:08 pm-10:29 pm

1 stop10h 21m

Ontario

Sun 8/24

10:59 pm-11:48 am

1 stop11h 49m

$533

San JoséOntario

SJO - ONT

SJOONT

San José Juan Santamaria Intl

Thu 5/22

9:35 am-9:55 pm

1 stop13h 20m

Ontario

Mon 6/23

1:09 am-11:14 pm

1 stop21h 05m

$608

San JoséOntario

SJO - ONT

SJOONT

San José Juan Santamaria Intl

Fri 9/19

8:00 am-8:38 am

2 stops25h 38m

Ontario

Wed 10/22

6:30 pm-10:55 pm

2 stops27h 25m

$672

San JoséOntario

SJO - ONT

SJOONT

San José Juan Santamaria Intl

Sat 5/17

3:31 pm-11:13 pm

1 stop8h 42m

$160

San JoséOntario

SJO - ONT

SJOONT

San José Juan Santamaria Intl

Tue 5/13

7:55 am-8:34 pm

2 stops13h 39m

$188

San JoséOntario

SJO - ONT

SJOONT

San José Juan Santamaria Intl

Mon 8/4

11:59 pm-10:01 am

1 stop11h 02m

$218

San JoséOntario

SJO - ONT

SJOONT

San José Juan Santamaria Intl

Thu 5/8

3:05 pm-9:55 pm

1 stop7h 50m

$279

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/17

Showing 1-10 of 11 results
1
2

Compare providers for flights from San José 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 José to Ontario in April.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*2 stars
ExpediaPrice Accuracy1 starTrust Score*3 stars
eDreamsPrice 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 José, San José Province-Ontario flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on San José, San José Province-Ontario flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from San José, San José Province-Ontario flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on San José, San José Province-Ontario flights, Cheapflights users trust eDreams the most. eDreams 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 José, San José Province-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 José to Ontario

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

Cheapflights Insights

Everything you need to know about your flight from San José to Ontario

How far ahead should I book a flight from San José, San José Province to Ontario?

Use this chart to determine the optimal time to book a round-trip flight from San José to Ontario. Price data was last updated on April 11, 2025.

To ensure you get the cheapest price possible for a flight from San José, San José Province to Ontario, you should look to book at least 89 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 José, San José Province to Ontario?

Currently, August is the cheapest month in which you can book a flight from San José, San José Province to Ontario (average of $246). Flying from San José, San José Province to Ontario in March is currently the most expensive (average of $328). 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 SJO to ONT?

Find hourly flight availability from San José 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 April 17, 2025.

Unlike at noon, when flights are generally more expensive, you can save up to 59% on flights from San José, San José Province to Ontario by exploring options for tickets in the afternoon.

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 April 17, 2025.
Alaska Airlines
8.0
Very good
9,882 reviews

Food

7.1

Overall

8.0

Boarding

8.2

Entertainment

7.1

Comfort

7.9

Crew

8.5

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >
Alaska Airlines
8.0
Very good
9,882 reviews
Alaska Airlines
8.0
Very good
9,882 reviews

Food

7.1

Overall

8.0

Boarding

8.2

Entertainment

7.1

Comfort

7.9

Crew

8.5

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >
Delta
8.0
Very good
7,917 reviews
Alaska Airlines
8.0
Very good
9,882 reviews

Food

7.1

Overall

8.0

Boarding

8.2

Entertainment

7.1

Comfort

7.9

Crew

8.5

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >
United Airlines
7.4
Good
8,667 reviews
Alaska Airlines
8.0
Very good
9,882 reviews

Food

7.1

Overall

8.0

Boarding

8.2

Entertainment

7.1

Comfort

7.9

Crew

8.5

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
9,882 reviews

Food

7.1

Overall

8.0

Boarding

8.2

Entertainment

7.1

Comfort

7.9

Crew

8.5

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >
Avianca
6.7
Okay
2,315 reviews
Alaska Airlines
8.0
Very good
9,882 reviews

Food

7.1

Overall

8.0

Boarding

8.2

Entertainment

7.1

Comfort

7.9

Crew

8.5

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >

Related info for your journey

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

  • What are the cheapest airlines flying from San José, San José Province to Ontario round-trip?

    Currently priced at $329, United Airlines will fly you from San José, San José Province to Ontario and back. In addition to United Airlines, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from American Airlines and Avianca - these airlines can fly you to your destination from $456 and $480, respectively. United Airlines is priced at 35% lower than the current average price of a flight leaving 3 months from now.

  • What are the cheapest airlines to fly from San José, San José Province to Ontario one-way?

    $188 is the cheapest one-way deal found within the past few days, from United Airlines. You may also be able to find cheap deals on American Airlines and Avianca, with prices starting from $218 and $279, respectively.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from San José 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 José, San José Province to Ontario?

    Currently, August is the cheapest month in which you can book a flight from San José, San José Province to Ontario (average of $246). Flying from San José, San José Province to Ontario in March is currently the most expensive (average of $328). 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 San José to Ontario

See prices for flight routes from nearby airports that may be better suited for you.
San José to Los Angeles flights
San José to Las Vegas flights
San José to San Francisco flights
San José to Burbank flights
Liberia to Los Angeles flights
San José to San Jose flights
San José to San Diego flights
San José to Oakland flights
San José to Sacramento flights
San José to Reno flights
Liberia to San Francisco flights
San José to Santa Ana flights
Liberia to Las Vegas flights
Liberia to Ontario flights
San José to Long Beach flights
San José to Tijuana flights
San José to Medford flights
Liberia to San Diego flights
San José to Santa Rosa flights
Liberia to Santa Ana flights
Liberia to Reno flights
Liberia to Sacramento flights
Liberia to San Jose flights
San José to Redding flights

Top 2 airlines flying from San José to Ontario

Discover the top 2 airlines that operate flights from San José 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 April 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$328Average$439FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$408Average$614FlexibilityNo 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.