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San José

$163+ 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 8/27. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — SJO
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
1 adult, Economy
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Cheap 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 June 12, 2025.

Round-trip from

$352
(United Airlines)

One-way from

$163
(American Airlines)

Popular in

December

Cheapest in

October

Average price

$554
From Ontario to San José Juan Santamaria Intl
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One-way flight from Ontario to San José Juan Santamaria Intl
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Highest demand for flights based on searches. 29% potential increase in price ($274 potential increase over avg. RT price).
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Cheapest flight prices on average. 16% potential price decrease ($91 potential savings vs. average RT price).
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Average for round-trip flights in June 2025
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Find 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 June 12, 2025.

This United Airlines deal was found by Cheapflights users on 6/10. 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 8/166:39 pmONT - SJO
1 stop11h 36mUnited Airlines
Fri 8/227:55 amSJO - ONT
1 stop14h 30mUnited Airlines
Deal found 6/10$352
This American Airlines deal was found by Cheapflights users on 6/11. 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.
Thu 6/126:10 amONT - SJO
1 stop14h 54mAmerican Airlines
Thu 6/1911:59 pmSJO - ONT
1 stop24h 03mAmerican Airlines
Deal found 6/11$360
This CheapOair deal was found by Cheapflights users on 6/11. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/271:04 amONT - SJO
1 stop20h 49mMultiple Airlines
Sun 12/74:13 pmSJO - ONT
1 stop9h 01mMultiple Airlines
Deal found 6/11$362
This Cheapflightsfares deal was found by Cheapflights users on 6/10. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/311:25 pmONT - SJO
1 stop10h 50mAvianca
Thu 8/79:35 amSJO - ONT
1 stop13h 20mAvianca
Deal found 6/10$451
This Delta deal was found by Cheapflights users on 6/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/1710:59 pmONT - SJO
1 stop11h 54mDelta
Fri 9/261:18 pmSJO - ONT
1 stop10h 23mDelta
Deal found 6/10$576
This Southwest deal was found by Cheapflights users on 6/11. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/15:15 amONT - SJO
2 stops13h 25mSouthwest
Sat 8/212:00 pmSJO - ONT
2 stops12h 10mSouthwest
Deal found 6/11$629

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 June 12, 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

Sat 8/16

6:39 pm-7:15 am

1 stop11h 36m

San José Juan Santamaria Intl

Fri 8/22

7:55 am-9:25 pm

1 stop14h 30m

$352

OntarioSan José

ONT - SJO

ONTSJO

Ontario

Mon 9/1

11:59 pm-8:15 pm

2 stops19h 16m

San José Juan Santamaria Intl

Sun 9/7

6:00 am-11:59 pm

2 stops18h 59m

$361

OntarioSan José

ONT - SJO

ONTSJO

Ontario

Thu 11/27

1:04 am-11:53 pm

1 stop20h 49m

San José Juan Santamaria Intl

Sun 12/7

4:13 pm-11:14 pm

1 stop9h 01m

$362

OntarioSan José

ONT - SJO

ONTSJO

Ontario

Sun 8/3

11:25 pm-11:15 am

1 stop10h 50m

San José Juan Santamaria Intl

Thu 8/7

9:35 am-9:55 pm

1 stop13h 20m

$451

OntarioSan José

ONT - SJO

ONTSJO

Ontario

Wed 9/17

10:59 pm-11:53 am

1 stop11h 54m

San José Juan Santamaria Intl

Fri 9/26

1:18 pm-10:41 pm

1 stop10h 23m

$576

OntarioSan José

ONT - SJO

ONTSJO

Ontario

Fri 8/1

5:15 am-7:40 pm

2 stops13h 25m

San José Juan Santamaria Intl

Sat 8/2

12:00 pm-11:10 pm

2 stops12h 10m

$629

OntarioSan José

ONT - SJO

ONTSJO

Ontario

Wed 8/27

11:59 pm-6:15 pm

1 stop17h 16m

$163

OntarioSan José

ONT - SJO

ONTSJO

Ontario

Tue 9/16

6:10 am-7:42 pm

2 stops12h 32m

$183

OntarioSan José

ONT - SJO

ONTSJO

Ontario

Sun 8/10

11:25 pm-8:40 am

1 stop8h 15m

$209

OntarioSan José

ONT - SJO

ONTSJO

Ontario

Fri 9/12

1:42 pm-7:15 am

1 stop16h 33m

$210

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/12

Showing 1-10 of 13 results
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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, San José Province?

Currently, September is the cheapest month in which you can book a flight from Ontario to San José, San José Province (average of $398). Flying from Ontario to San José, San José Province in March is currently the most expensive (average of $555). 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 June 12, 2025.

A simple way to save on the total cost of your ticket is to fly from Ontario to San José, San José Province in the afternoon. If you’re flexible enough to do this you can expect to save up to 30% on your trip compared to booking a flight in the morning.

Rainfall in San José by month

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

In terms of precipitation, rainfall in San José, San José Province ranges from 0.0 - 11.8 inches per month. September is typically the wettest month, when rainfall can reach 11.8 in. February is typically the driest time to visit San José, San José Province when rainfall is around 0.0 in.

Temperature in San José by month

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

If weather is an important factor for your trip to San José, San José Province, use this chart to help with planning. For those seeking warmer temperatures, April is the ideal time of year to visit, when temperatures reach an average of 69.8 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 64.4 F).

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 June 12, 2025.
Read reviews from past customers who have flown Southwest, Delta and United Airlines from Ontario to San José. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,287 reviews

Boarding

8.2

Food

7.1

Crew

8.6

Comfort

8.0

Overall

8.0

Entertainment

7.6

Reviews

1 / 20
10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.
Southwest
8.0
Very good
4,287 reviews
Southwest
8.0
Very good
4,287 reviews

Boarding

8.2

Food

7.1

Crew

8.6

Comfort

8.0

Overall

8.0

Entertainment

7.6

Reviews

1 / 20
10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.
Delta
8.0
Very good
7,950 reviews
Southwest
8.0
Very good
4,287 reviews

Boarding

8.2

Food

7.1

Crew

8.6

Comfort

8.0

Overall

8.0

Entertainment

7.6

Reviews

1 / 20
10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.
United Airlines
7.4
Good
8,790 reviews
Southwest
8.0
Very good
4,287 reviews

Boarding

8.2

Food

7.1

Crew

8.6

Comfort

8.0

Overall

8.0

Entertainment

7.6

Reviews

1 / 20
10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.
JetBlue
7.3
Good
2,925 reviews
Southwest
8.0
Very good
4,287 reviews

Boarding

8.2

Food

7.1

Crew

8.6

Comfort

8.0

Overall

8.0

Entertainment

7.6

Reviews

1 / 20
10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,287 reviews

Boarding

8.2

Food

7.1

Crew

8.6

Comfort

8.0

Overall

8.0

Entertainment

7.6

Reviews

1 / 20
10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.

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.

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

    Flying on United Airlines is currently your cheapest option to San José, San José Province, with prices starting at $352. Additional round-trip tickets that might be worth considering are offered by American Airlines and Avianca, with the lowest prices starting at $361 and $451, respectively. You may be able to fly from Ontario to San José, San José Province for 45% less than the average price by searching for these airlines.

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

    One-way options have recently been found by users for as low as $163 on American Airlines. Other airlines that offer cheap prices include Iberia from $183 and Avianca from $209 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, San José Province?

    Currently, September is the cheapest month in which you can book a flight from Ontario to San José, San José Province (average of $398). Flying from Ontario to San José, San José Province in March is currently the most expensive (average of $555). 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 Ontario?

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

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Top 4 airlines flying from Ontario to San José

Discover the top 4 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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
AviancaCheapest$326Average$493FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$349Average$590FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$403Average$586FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$616Average$698FlexibilityNo cancel feeOn-time63%

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