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San José

$220+ 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 6/2. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — SJO
May 23 — May 301
Sat 5/23
Sat 5/30
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 April 23, 2026.

This American Airlines deal was found by Cheapflights users on 4/23. 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 12/212:46 pm
ONT
-
SJO
1 stop8h 13m
American Airlines
Tue 12/156:20 am
SJO
-
ONT
1 stop9h 40m
American Airlines
Deal found 4/23$485
This American Airlines deal was found by Cheapflights users on 4/21. 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.
Tue 4/287:30 am
ONT
-
SJO
2 stops10h 37m
American Airlines
Tue 5/52:08 pm
SJO
-
ONT
1 stop9h 28m
American Airlines
Deal found 4/21$486
This American Airlines deal was found by Cheapflights users on 4/22. 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.
Fri 5/811:59 pm
ONT
-
SJO
1 stop12h 27m
American Airlines
Tue 5/122:08 pm
SJO
-
ONT
1 stop9h 32m
American Airlines
Deal found 4/22$494
This American Airlines deal was found by Cheapflights users on 4/22. 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.
Thu 7/237:14 pm
ONT
-
SJO
2 stops18h 03m
American Airlines
Sun 9/131:05 pm
SJO
-
ONT
2 stops25h 22m
American Airlines
Deal found 4/22$504
This American Airlines deal was found by Cheapflights users on 4/20. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/2811:03 pm
ONT
-
SJO
2 stops18h 27m
American Airlines
Mon 10/1912:57 pm
SJO
-
ONT
1 stop23h 51m
American Airlines
Deal found 4/20$509
This Avianca deal was found by Cheapflights users on 4/21. 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 Avianca is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/2111:35 pm
ONT
-
SJO
1 stop8h 10m
Avianca
Thu 5/283:10 pm
SJO
-
ONT
1 stop7h 35m
Avianca
Deal found 4/21$510
This American Airlines deal was found by Cheapflights users on 4/21. 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 5/1311:59 pm
ONT
-
SJO
2 stops18h 08m
American Airlines
Sun 5/1711:35 pm
SJO
-
ONT
1 stop20h 03m
American Airlines
Deal found 4/21$514
This American Airlines deal was found by Cheapflights users on 4/20. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/1811:59 pm
ONT
-
SJO
2 stops17h 31m
American Airlines
Fri 9/2512:57 pm
SJO
-
ONT
2 stops23h 32m
American Airlines
Deal found 4/20$515
This Super.com deal was found by Cheapflights users on 4/20. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/511:35 pm
ONT
-
SJO
1 stop8h 10m
Avianca
Sat 5/93:10 pm
SJO
-
ONT
1 stop7h 35m
Avianca
Deal found 4/20$516
This Super.com deal was found by Cheapflights users on 4/19. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/1911:35 pm
ONT
-
SJO
1 stop8h 10m
Avianca
Tue 5/263:10 pm
SJO
-
ONT
1 stop7h 35m
Avianca
Deal found 4/19$517

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 April 23, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$486
(American Airlines)

One-way from

$220
(SmartFares)

Popular in

March

Cheapest in

October

Average price

$494
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. 7% potential increase in price ($39 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($7 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 2026
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 April 23, 2026.
Use the filters below to find and compare flights from Ontario to San José that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip
Quickest round-trip

OntarioSan José

ONT - SJO

ONTSJO

Ontario

Sun 5/3

6:00 am-7:37 pm

1 stop12h 37m

San José Juan Santamaria Intl

Thu 5/14

1:25 pm-9:58 pm

1 stop9h 33m

$654

OntarioSan José

ONT - SJO

ONTSJO

Ontario

Mon 6/1

1:50 pm-7:15 am

1 stop16h 25m

San José Juan Santamaria Intl

Sat 6/6

6:40 am-8:42 pm

1 stop15h 02m

$654

OntarioSan José

ONT - SJO

ONTSJO

Ontario

Mon 6/1

1:50 pm-7:15 am

1 stop16h 25m

San José Juan Santamaria Intl

Sun 6/7

8:45 am-10:37 pm

1 stop14h 52m

$654

OntarioSan José

ONT - SJO

ONTSJO

Ontario

Wed 5/6

6:00 am-7:37 pm

1 stop12h 37m

San José Juan Santamaria Intl

Wed 5/13

8:45 am-5:52 pm

1 stop10h 07m

$654

OntarioSan José

ONT - SJO

ONTSJO

Ontario

Wed 5/27

5:00 am-7:37 pm

2 stops13h 37m

San José Juan Santamaria Intl

Sat 5/30

8:45 am-10:50 pm

1 stop15h 05m

$659

OntarioSan José

ONT - SJO

ONTSJO

Ontario

Thu 10/1

1:49 pm-12:21 pm

2 stops21h 32m

San José Juan Santamaria Intl

Fri 10/9

8:45 am-10:59 pm

1 stop15h 14m

$659

OntarioSan José

ONT - SJO

ONTSJO

Ontario

Wed 7/1

6:00 am-7:15 am

1 stop24h 15m

San José Juan Santamaria Intl

Wed 7/8

7:55 am-9:55 pm

1 stop15h 00m

$662

OntarioSan José

ONT - SJO

ONTSJO

Ontario

Mon 5/18

6:00 am-7:15 am

1 stop24h 15m

San José Juan Santamaria Intl

Sat 5/30

8:45 am-10:50 pm

1 stop15h 05m

$662

OntarioSan José

ONT - SJO

ONTSJO

Ontario

Fri 5/29

5:00 am-9:15 pm

1 stop15h 15m

San José Juan Santamaria Intl

Thu 7/2

12:30 am-9:55 pm

1 stop22h 25m

$668

OntarioSan José

ONT - SJO

ONTSJO

Ontario

Sun 6/14

5:45 am-10:39 pm

1 stop15h 54m

San José Juan Santamaria Intl

Sun 6/28

12:30 am-9:55 pm

1 stop22h 25m

$668

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/21

Showing 1-10 of 18 resultsSorted by cheapest first
1
2

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 April.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
OvagoPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy2 starsTrust Score*2 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 FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Ontario-San José flight deals on Cheapflights vs. FlightHub >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 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 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 $371). Flying from Ontario to San José in March is currently the most expensive (average of $545). 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.

How much does it cost to fly round-trip from Ontario to San José?

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 April 23, 2026.
Read reviews from past customers who have flown United Airlines,American Airlines, andAvianca 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
9,644 reviews

Overall

7.4

Food

6.6

Entertainment

7.1

Boarding

7.7

Crew

8.1

Comfort

7.3

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
9,644 reviews
United Airlines
7.4
Good
9,644 reviews

Overall

7.4

Food

6.6

Entertainment

7.1

Boarding

7.7

Crew

8.1

Comfort

7.3

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
7.1
Good
11,664 reviews
United Airlines
7.4
Good
9,644 reviews

Overall

7.4

Food

6.6

Entertainment

7.1

Boarding

7.7

Crew

8.1

Comfort

7.3

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
6.5
Okay
2,514 reviews
United Airlines
7.4
Good
9,644 reviews

Overall

7.4

Food

6.6

Entertainment

7.1

Boarding

7.7

Crew

8.1

Comfort

7.3

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 12h 37m. 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 Avianca. Our recent data shows that you can find tickets from as low as $215 on this airline. Additional options worth looking into are United Airlines and American Airlines, starting at $349 and $371 round-trip. Users have found that Avianca is 54% 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 Avianca, which is currently one of the cheapest options available, starting at $155. American Airlines flights start at $159 while deals on United Airlines start at $169 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 $371). Flying from Ontario to San José in March is currently the most expensive (average of $545). 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
Alajuela
Monteverde
Jacó
Heredia
Dominical
Manuel Antonio

Browse thousands of different options on Cheapflights for your next trip

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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 April 23, 2026.
AirlineCheapestAverageFlexibilityOn-time
AviancaCheapest$215Average$489FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$349Average$466FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$371Average$545FlexibilityNo cancel feeOn-time71%

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