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San José

$153+ 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 9/25. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — SJO
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
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 September 11, 2025.

Round-trip from

$304
(Mytrip)

One-way from

$153
(Justfly.com)

Popular in

December

Cheapest in

October

Average price

$565
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. 32% potential increase in price ($306 potential increase over avg. RT price).
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Cheapest flight prices on average. 16% potential price decrease ($93 potential savings vs. average RT price).
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Average for round-trip flights in September 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 September 11, 2025.

This Mytrip deal was found by Cheapflights users on 9/11. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/2511:25 pmONT - SJO
1 stop10h 50mAvianca
Thu 10/23:05 pmSJO - ONT
1 stop7h 50mAvianca
Deal found 9/11$304
This Priceline deal was found by Cheapflights users on 9/11. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/2711:25 pmONT - SJO
1 stop10h 50mAvianca
Sat 10/45:05 amSJO - ONT
1 stop17h 50mAvianca
Deal found 9/11$320
This Priceline deal was found by Cheapflights users on 9/10. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/1111:25 pmONT - SJO
1 stop10h 50mAvianca
Sat 10/185:05 amSJO - ONT
1 stop17h 50mAvianca
Deal found 9/10$347
This American Airlines deal was found by Cheapflights users on 9/9. 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 11/1010:34 pmONT - SJO
2 stops11h 38mAmerican Airlines
Thu 11/132:39 pmSJO - ONT
1 stop9h 44mAmerican Airlines
Deal found 9/9$363
This Trip.com deal was found by Cheapflights users on 9/10. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/266:36 pmONT - SJO
1 stop11h 39mMultiple Airlines
Thu 10/23:05 pmSJO - ONT
1 stop7h 50mMultiple Airlines
Deal found 9/10$366
This Priceline deal was found by Cheapflights users on 9/10. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/911:25 pmONT - SJO
1 stop10h 50mAvianca
Tue 10/149:35 amSJO - ONT
1 stop13h 20mAvianca
Deal found 9/10$368
This United Airlines deal was found by Cheapflights users on 9/10. 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.
Tue 9/306:36 pmONT - SJO
1 stop11h 39mUnited Airlines
Fri 10/38:37 amSJO - ONT
1 stop15h 15mUnited Airlines
Deal found 9/10$372
This American Airlines deal was found by Cheapflights users on 9/10. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/3010:35 pmONT - SJO
2 stops20h 07mAmerican Airlines
Fri 10/312:12 pmSJO - ONT
2 stops22h 51mAmerican Airlines
Deal found 9/10$376
This Priceline deal was found by Cheapflights users on 9/10. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/3011:25 pmONT - SJO
1 stop10h 50mAvianca
Sat 10/45:05 amSJO - ONT
1 stop17h 50mAvianca
Deal found 9/10$378
This American Airlines deal was found by Cheapflights users on 9/9. 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 11/1712:55 pmONT - SJO
2 stops21h 17mAmerican Airlines
Sun 11/236:22 amSJO - ONT
2 stops11h 39mAmerican Airlines
Deal found 9/9$381
This United Airlines deal was found by Cheapflights users on 9/9. 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 11/176:38 pmONT - SJO
1 stop11h 54mUnited Airlines
Sun 11/238:45 amSJO - ONT
1 stop15h 04mUnited Airlines
Deal found 9/9$385
This Cheapflightsfares deal was found by Cheapflights users on 9/10. 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.
Thu 10/911:25 pmONT - SJO
1 stop13h 05mAvianca
Thu 10/169:35 amSJO - ONT
1 stop13h 20mAvianca
Deal found 9/10$394

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 September 11, 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 9/23

6:50 pm-7:15 am

1 stop11h 25m

San José Juan Santamaria Intl

Sat 10/4

8:37 am-10:52 pm

1 stop15h 15m

$476

OntarioSan José

ONT - SJO

ONTSJO

Ontario

Fri 1/23

6:00 am-8:39 pm

1 stop12h 39m

San José Juan Santamaria Intl

Wed 2/4

6:30 am-9:58 pm

1 stop17h 28m

$482

OntarioSan José

ONT - SJO

ONTSJO

Ontario

Tue 10/14

1:53 pm-7:15 am

1 stop16h 22m

San José Juan Santamaria Intl

Thu 10/23

1:30 pm-9:24 pm

1 stop8h 54m

$482

OntarioSan José

ONT - SJO

ONTSJO

Ontario

Wed 1/28

6:39 pm-8:32 am

1 stop11h 53m

San José Juan Santamaria Intl

Wed 2/4

9:40 am-5:43 pm

1 stop10h 03m

$482

OntarioSan José

ONT - SJO

ONTSJO

Ontario

Thu 1/22

6:00 am-8:39 pm

2 stops12h 39m

San José Juan Santamaria Intl

Mon 2/2

8:45 am-9:58 pm

1 stop15h 13m

$482

OntarioSan José

ONT - SJO

ONTSJO

Ontario

Thu 1/22

6:00 am-8:39 pm

1 stop12h 39m

San José Juan Santamaria Intl

Thu 1/29

8:45 am-9:58 pm

1 stop15h 13m

$482

OntarioSan José

ONT - SJO

ONTSJO

Ontario

Sat 1/17

6:00 am-8:39 pm

1 stop12h 39m

San José Juan Santamaria Intl

Sun 1/25

6:30 am-9:58 pm

1 stop17h 28m

$482

OntarioSan José

ONT - SJO

ONTSJO

Ontario

Thu 1/22

6:00 am-8:39 pm

2 stops12h 39m

San José Juan Santamaria Intl

Sun 2/1

6:30 am-9:58 pm

1 stop17h 28m

$482

OntarioSan José

ONT - SJO

ONTSJO

Ontario

Sat 1/24

5:05 am-10:00 pm

1 stop14h 55m

San José Juan Santamaria Intl

Sun 2/1

9:40 am-10:53 pm

1 stop15h 13m

$482

OntarioSan José

ONT - SJO

ONTSJO

Ontario

Tue 1/27

1:20 pm-1:15 pm

2 stops21h 55m

San José Juan Santamaria Intl

Sat 1/31

6:30 am-5:43 pm

2 stops13h 13m

$486

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/8

Showing 1-10 of 22 results
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2
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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 September 11, 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.

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

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 September 11, 2025.
Read reviews from past customers who have flown Southwest, United Airlines, and American Airlines 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.
Southwest
8.0
Very good
4,248 reviews

Crew

8.6

Overall

8.0

Entertainment

7.5

Comfort

8.0

Food

7.0

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
Southwest
8.0
Very good
4,248 reviews
Southwest
8.0
Very good
4,248 reviews

Crew

8.6

Overall

8.0

Entertainment

7.5

Comfort

8.0

Food

7.0

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
United Airlines
7.4
Good
8,937 reviews
Southwest
8.0
Very good
4,248 reviews

Crew

8.6

Overall

8.0

Entertainment

7.5

Comfort

8.0

Food

7.0

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,248 reviews

Crew

8.6

Overall

8.0

Entertainment

7.5

Comfort

8.0

Food

7.0

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
Avianca
6.7
Okay
2,436 reviews
Southwest
8.0
Very good
4,248 reviews

Crew

8.6

Overall

8.0

Entertainment

7.5

Comfort

8.0

Food

7.0

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.

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, San José Province?

    United Airlines can get you from Ontario to San José, San José Province in just under 11h 25m. Your travel time can differ by up to . The distance between Ontario and San José, San José Province is about 2685 mi.

  • 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 $349. Additional round-trip tickets that might be worth considering are offered by American Airlines and Avianca, with the lowest prices starting at $399 and $413, 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 $170 on United Airlines. Other airlines that offer cheap prices include American Airlines from $212 and Avianca from $212 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 San José?

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

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Alternative routes for Ontario to San José

See prices for flight routes from nearby airports that may be better suited for you.
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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 September 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$349Average$532FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$399Average$604FlexibilityNo cancel feeOn-time71%
AviancaCheapest$413Average$489FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$550Average$698FlexibilityNo cancel feeOn-time63%

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