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San José

$152+ Cheap flights from Ontario (ONT) to San José (SJO)

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 1/18. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — SJO
Jan 12 — Jan 191
Mon 1/12
Mon 1/19
1 adult, Economy
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Cheap flight deals from Ontario to San José

Cheapest flights from Ontario to San José
Explore the most affordable flight options available from Ontario to San José. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 13, 2025.

This American Airlines deal was found by Cheapflights users on 12/11. 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.
Sat 12/133:04 pmONT - SJO
2 stops19h 09mAmerican Airlines
Wed 12/173:38 pmSJO - ONT
2 stops20h 17mAmerican Airlines
Deal found 12/11$456
This United Airlines deal was found by Cheapflights users on 12/12. 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 12/136:41 pmONT - SJO
1 stop11h 51mUnited Airlines
Tue 12/169:40 amSJO - ONT
1 stop15h 09mUnited Airlines
Deal found 12/12$482
This United Airlines deal was found by Cheapflights users on 12/11. 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 12/131:34 pmONT - SJO
2 stops29h 05mUnited Airlines
Wed 12/178:45 amSJO - ONT
2 stops27h 16mUnited Airlines
Deal found 12/11$503
This United Airlines deal was found by Cheapflights users on 12/10. 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 12/136:41 pmONT - SJO
1 stop11h 51mUnited Airlines
Thu 12/188:45 amSJO - ONT
1 stop15h 07mUnited Airlines
Deal found 12/10$522
This United Airlines deal was found by Cheapflights users on 12/11. 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.
Fri 12/125:05 amONT - SJO
1 stop14h 55mUnited Airlines
Wed 12/172:20 pmSJO - ONT
2 stops21h 41mUnited Airlines
Deal found 12/11$526
This United Airlines deal was found by Cheapflights users on 12/11. 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.
Thu 12/185:05 amONT - SJO
1 stop14h 55mUnited Airlines
Sun 12/219:40 amSJO - ONT
1 stop15h 01mUnited Airlines
Deal found 12/11$562
This United Airlines deal was found by Cheapflights users on 12/12. 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 12/135:05 amONT - SJO
2 stops13h 34mUnited Airlines
Sat 12/208:45 amSJO - ONT
2 stops14h 22mUnited Airlines
Deal found 12/12$566
This United Airlines deal was found by Cheapflights users on 12/11. 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.
Mon 12/156:00 amONT - SJO
1 stop12h 39mUnited Airlines
Wed 12/179:40 amSJO - ONT
1 stop26h 21mUnited Airlines
Deal found 12/11$568

Find flight deals from Ontario to San José

Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to San José (SJO). 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 December 13, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$310
(Gotogate)

One-way from

$152
(FlightHub)

Popular in

February

Cheapest in

October

Average price

$454
Provider with most accurate pricing for Ontario-San José Juan Santamaria Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Ontario-San José Juan Santamaria Intl flights.
Search Deals
From Ontario to San José Juan Santamaria Intl
Search Deals
One-way flight from Ontario to San José Juan Santamaria Intl
Search Deals
Highest demand for flights based on searches. 11% potential increase in price ($69 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($16 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ontario to San José 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 December 13, 2025.
Use the filters below to find and compare flights from Ontario to San José that are best for you.

Fly from

Ontario

Fly to

San José

Route

Depart

Return

Price

OntarioSan José

ONT - SJO

ONTSJO

Ontario

Tue 1/27

1:53 pm-8:32 am

1 stop16h 39m

San José Juan Santamaria Intl

Tue 2/3

9:40 am-5:55 pm

1 stop10h 15m

$482

OntarioSan José

ONT - SJO

ONTSJO

Ontario

Sun 3/8

11:59 pm-11:56 am

1 stop10h 57m

San José Juan Santamaria Intl

Sat 3/14

8:40 am-10:57 pm

1 stop15h 17m

$482

OntarioSan José

ONT - SJO

ONTSJO

Ontario

Wed 2/18

8:00 am-6:16 pm

1 stop8h 16m

San José Juan Santamaria Intl

Thu 2/26

12:35 pm-9:59 pm

1 stop11h 24m

$482

OntarioSan José

ONT - SJO

ONTSJO

Ontario

Wed 1/28

1:53 pm-8:32 am

1 stop16h 39m

San José Juan Santamaria Intl

Sat 1/31

6:30 am-9:58 pm

1 stop17h 28m

$482

OntarioSan José

ONT - SJO

ONTSJO

Ontario

Sun 3/8

11:59 pm-11:56 am

1 stop10h 57m

San José Juan Santamaria Intl

Mon 3/16

8:40 am-10:57 pm

1 stop15h 17m

$482

OntarioSan José

ONT - SJO

ONTSJO

Ontario

Mon 1/26

6:00 am-8:39 pm

1 stop12h 39m

San José Juan Santamaria Intl

Thu 1/29

9:40 am-10:53 pm

1 stop15h 13m

$482

OntarioSan José

ONT - SJO

ONTSJO

Ontario

Tue 3/10

6:00 am-9:32 pm

1 stop14h 32m

San José Juan Santamaria Intl

Thu 3/12

8:40 am-10:57 pm

1 stop15h 17m

$482

OntarioSan José

ONT - SJO

ONTSJO

Ontario

Sat 1/24

6:32 pm-8:32 am

1 stop12h 00m

San José Juan Santamaria Intl

Sat 1/31

6:30 am-9:58 pm

1 stop17h 28m

$482

OntarioSan José

ONT - SJO

ONTSJO

Ontario

Thu 4/16

6:53 pm-7:15 am

1 stop11h 22m

San José Juan Santamaria Intl

Fri 4/24

8:45 am-11:06 pm

1 stop15h 21m

$482

OntarioSan José

ONT - SJO

ONTSJO

Ontario

Mon 3/9

11:59 pm-11:56 am

1 stop10h 57m

San José Juan Santamaria Intl

Mon 3/16

8:40 am-10:57 pm

1 stop15h 17m

$482

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/12

Showing 1-10 of 23 results
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2
3

Compare providers for flights from Ontario to San José

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 José in December.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
AranGrantPrice Accuracy2 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 Ontario-San José flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Ontario-San José flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Ontario-San José flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Ontario-San José 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 Ontario-San José 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 José

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

Cheapflights Insights

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

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

Currently, October is the cheapest month in which you can book a flight from Ontario to San José (average of $152). Flying from Ontario to San José in December is currently the most expensive (average of $306). 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 SJO?

Find hourly flight availability from Ontario to San José. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 13, 2025.

A simple way to save on the total cost of your ticket is to fly from Ontario to San José in the afternoon. If you’re flexible enough to do this you can expect to save up to 34% on your trip compared to booking a flight in the morning.

Reviews of airlines servicing San José

Get insights into the airlines that provide service to San José. 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 José. Reviews last updated December 13, 2025.
Read reviews from past customers who have flown United Airlines, American Airlines, and Avianca from Ontario to San José. 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.
United Airlines
7.4
Good
9,094 reviews

Comfort

7.3

Entertainment

7.1

Food

6.6

Overall

7.4

Boarding

7.7

Crew

8.1

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
United Airlines
7.4
Good
9,094 reviews
United Airlines
7.4
Good
9,094 reviews

Comfort

7.3

Entertainment

7.1

Food

6.6

Overall

7.4

Boarding

7.7

Crew

8.1

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
American Airlines
7.2
Good
11,052 reviews
United Airlines
7.4
Good
9,094 reviews

Comfort

7.3

Entertainment

7.1

Food

6.6

Overall

7.4

Boarding

7.7

Crew

8.1

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
Avianca
6.6
Okay
2,482 reviews
United Airlines
7.4
Good
9,094 reviews

Comfort

7.3

Entertainment

7.1

Food

6.6

Overall

7.4

Boarding

7.7

Crew

8.1

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??

Related info for your journey

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

  • How long is the flight from Ontario to San José?

    United Airlines can get you from Ontario to San José in just under 16h 39m. Your travel time can differ by up to . There are 2685 mi between Ontario and San José.

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

    Our cheapest airline available from Ontario to San José is United Airlines. Our recent data shows that you can find tickets from as low as $349 on this airline. Additional options worth looking into are American Airlines and Avianca, starting at $366 and $413 round-trip. Users have found that United Airlines is 32% cheaper than the other options available to this destination.

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

    To fly one-way, consider booking your trip with American Airlines, which is currently one of the cheapest options available, starting at $159. United Airlines flights start at $159 while deals on Southwest start at $216 one-way.

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

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

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

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

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

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

    Currently, October is the cheapest month in which you can book a flight from Ontario to San José (average of $152). Flying from Ontario to San José in December is currently the most expensive (average of $306). 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

Traveling to a place near San José?

Book flights to San José if you plan to visit one of these locations
Manuel Antonio
Alajuela
Monteverde
Jacó
Heredia
Dominical

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Top 3 airlines flying from Ontario to San José

Discover the top 3 airlines that operate flights from Ontario to San José. 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 December 13, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$351Average$485FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$366Average$576FlexibilityNo cancel feeOn-time71%
AviancaCheapest$413Average$528FlexibilityNo cancel feeOn-time71%

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