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San José

$225+ 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 9/7. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — SJO
Aug 26 — Sep 21
Wed 8/26
Wed 9/2
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 July 27, 2026.

This Southwest deal was found by Cheapflights users on 7/27. 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.
Wed 9/236:40 am
ONT
-
SJO
2 stops11h 05m
Southwest
Wed 9/301:40 pm
SJO
-
ONT
1 stop9h 25m
Southwest
Deal found 7/27$500
This Southwest deal was found by Cheapflights users on 7/22. 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.
Mon 11/306:30 pm
ONT
-
SJO
2 stops15h 50m
Southwest
Fri 12/111:20 pm
SJO
-
ONT
2 stops21h 30m
Southwest
Deal found 7/22$502
This Avianca deal was found by Cheapflights users on 7/26. 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 8/2711:35 pm
ONT
-
SJO
1 stop8h 10m
Avianca
Thu 9/39:40 am
SJO
-
ONT
1 stop13h 05m
Avianca
Deal found 7/26$509
This Avianca deal was found by Cheapflights users on 7/26. 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.
Sat 8/2911:35 pm
ONT
-
SJO
1 stop8h 10m
Avianca
Thu 9/39:40 am
SJO
-
ONT
1 stop13h 05m
Avianca
Deal found 7/26$519
This Southwest deal was found by Cheapflights users on 7/23. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/127:05 am
ONT
-
SJO
2 stops10h 00m
Southwest
Tue 9/221:40 pm
SJO
-
ONT
1 stop9h 25m
Southwest
Deal found 7/23$528
This Avianca deal was found by Cheapflights users on 7/26. 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.
Sat 8/2211:35 pm
ONT
-
SJO
1 stop8h 10m
Avianca
Sat 8/299:40 am
SJO
-
ONT
1 stop13h 05m
Avianca
Deal found 7/26$529
This oojo deal was found by Cheapflights users on 7/26. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/2511:35 pm
ONT
-
SJO
1 stop10h 55m
Avianca
Tue 9/83:10 pm
SJO
-
ONT
1 stop7h 35m
Avianca
Deal found 7/26$547
This oojo deal was found by Cheapflights users on 7/23. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/1311:35 pm
ONT
-
SJO
1 stop10h 55m
Avianca
Sat 8/223:10 pm
SJO
-
ONT
1 stop7h 35m
Avianca
Deal found 7/23$548
This Southwest deal was found by Cheapflights users on 7/23. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/185:45 am
ONT
-
SJO
2 stops11h 55m
Southwest
Wed 9/161:40 pm
SJO
-
ONT
1 stop9h 25m
Southwest
Deal found 7/23$549
This Justfly.com deal was found by Cheapflights users on 7/23. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/1811:35 pm
ONT
-
SJO
1 stop10h 55m
Avianca
Tue 8/253:10 pm
SJO
-
ONT
1 stop7h 35m
Avianca
Deal found 7/23$552
This oojo deal was found by Cheapflights users on 7/26. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/1911:35 pm
ONT
-
SJO
1 stop8h 10m
Avianca
Fri 9/257:45 pm
SJO
-
ONT
1 stop27h 00m
Avianca
Deal found 7/26$565
This Justfly.com deal was found by Cheapflights users on 7/23. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/1811:35 pm
ONT
-
SJO
1 stop10h 55m
Avianca
Mon 8/247:45 pm
SJO
-
ONT
1 stop27h 00m
Avianca
Deal found 7/23$569

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 July 27, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$500
(Southwest)

One-way from

$225
(KAYAK)

Popular in

July

Cheapest in

October

Average price

$760
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. 19% potential increase in price ($126 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($21 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 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 July 27, 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

Thu 8/20

11:35 pm-8:45 am

1 stop8h 10m

San José Juan Santamaria Intl

Tue 8/25

3:10 pm-9:45 pm

1 stop7h 35m

$519

OntarioSan José

ONT - SJO

ONTSJO

Ontario

Wed 8/26

1:56 pm-7:15 am

1 stop16h 19m

San José Juan Santamaria Intl

Thu 9/10

8:45 am-6:11 pm

1 stop10h 26m

$740

OntarioSan José

ONT - SJO

ONTSJO

Ontario

Sun 11/15

6:00 am-8:39 pm

1 stop12h 39m

San José Juan Santamaria Intl

Sat 11/21

9:40 am-8:06 pm

1 stop12h 26m

$740

OntarioSan José

ONT - SJO

ONTSJO

Ontario

Thu 9/10

6:08 am-7:37 pm

2 stops12h 29m

San José Juan Santamaria Intl

Thu 9/17

7:55 am-8:01 pm

2 stops13h 06m

$745

OntarioSan José

ONT - SJO

ONTSJO

Ontario

Thu 9/3

7:13 pm-7:15 am

1 stop11h 02m

San José Juan Santamaria Intl

Sun 9/6

8:45 am-8:01 pm

1 stop12h 16m

$750

OntarioSan José

ONT - SJO

ONTSJO

Ontario

Wed 8/26

1:56 pm-7:15 am

1 stop16h 19m

San José Juan Santamaria Intl

Wed 9/2

7:55 am-12:12 pm

2 stops29h 17m

$755

OntarioSan José

ONT - SJO

ONTSJO

Ontario

Thu 1/21

5:00 am-8:39 pm

2 stops13h 39m

San José Juan Santamaria Intl

Sun 1/24

1:15 am-12:20 pm

2 stops13h 05m

$755

OntarioSan José

ONT - SJO

ONTSJO

Ontario

Thu 11/26

9:25 am-8:32 am

1 stop21h 07m

San José Juan Santamaria Intl

Sun 12/6

8:45 am-9:21 pm

1 stop14h 36m

$758

OntarioSan José

ONT - SJO

ONTSJO

Ontario

Mon 11/16

6:36 pm-8:32 am

1 stop11h 56m

San José Juan Santamaria Intl

Fri 11/20

8:45 am-9:50 pm

1 stop15h 05m

$779

OntarioSan José

ONT - SJO

ONTSJO

Ontario

Mon 10/5

6:07 am-7:37 pm

2 stops12h 30m

San José Juan Santamaria Intl

Tue 10/20

7:55 am-8:31 pm

2 stops13h 36m

$784

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/25

Showing 1-10 of 22 resultsSorted by cheapest first
1
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 July.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
OvagoPrice 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 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 July is currently the most expensive (average of $760). 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.

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 July 27, 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
10,045 reviews

Crew

8.1

Entertainment

7.1

Food

6.6

Comfort

7.3

Overall

7.4

Boarding

7.7

Reviews

1 / 20
4.0
Okay

Dynasty,May 2026

LAX - EWR

The food wasn’t nice - Hosts were not that kind.
United Airlines
7.4
Good
10,045 reviews
United Airlines
7.4
Good
10,045 reviews

Crew

8.1

Entertainment

7.1

Food

6.6

Comfort

7.3

Overall

7.4

Boarding

7.7

Reviews

1 / 20
4.0
Okay

Dynasty,May 2026

LAX - EWR

The food wasn’t nice - Hosts were not that kind.
American Airlines
7.1
Good
11,841 reviews
United Airlines
7.4
Good
10,045 reviews

Crew

8.1

Entertainment

7.1

Food

6.6

Comfort

7.3

Overall

7.4

Boarding

7.7

Reviews

1 / 20
4.0
Okay

Dynasty,May 2026

LAX - EWR

The food wasn’t nice - Hosts were not that kind.
Avianca
6.5
Okay
2,522 reviews
United Airlines
7.4
Good
10,045 reviews

Crew

8.1

Entertainment

7.1

Food

6.6

Comfort

7.3

Overall

7.4

Boarding

7.7

Reviews

1 / 20
4.0
Okay

Dynasty,May 2026

LAX - EWR

The food wasn’t nice - Hosts were not that kind.

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?

    Avianca and United Airlines can get you from Ontario to San José in just under 8h 10m. Your travel time can differ by up to 8h 09m. There are 2685 mi between Ontario and San José. Both multi-stop and nonstop flights can be found to your destination and back.

  • 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 $371 on this airline. Additional options worth looking into are American Airlines and Avianca, starting at $393 and $404 round-trip. Users have found that United Airlines is 29% 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 July is currently the most expensive (average of $760). 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
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 July 27, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$371Average$494FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$393Average$489FlexibilityNo cancel feeOn-time71%
AviancaCheapest$404Average$505FlexibilityNo cancel feeOn-time71%

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