HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
San José

$147+ 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 3/4. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — SJO
feb. 25 — mar. 41
mié. 2/25
mié. 3/4
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Ontario to San José with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 enero 26, 2026.

This Avianca deal was found by Cheapflights users on 1/25. 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.
mar. 1/2710:30 pm
ONT
-
SJO
1 stop10h 55m
Avianca
sáb. 1/316:00 am
SJO
-
ONT
2 stops16h 55m
Avianca
Deal found 1/25$170
This American Airlines deal was found by Cheapflights users on 1/25. 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.
mar. 2/1711:58 pm
ONT
-
SJO
2 stops18h 14m
American Airlines
mar. 2/243:59 pm
SJO
-
ONT
2 stops21h 29m
American Airlines
Deal found 1/25$398
This United Airlines deal was found by Cheapflights users on 1/26. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 5/110:37 am
ONT
-
SJO
1 stop19h 38m
United Airlines
dom. 5/178:45 am
SJO
-
ONT
1 stop15h 14m
United Airlines
Deal found 1/26$404
This American Airlines deal was found by Cheapflights users on 1/24. 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.
vie. 5/811:59 pm
ONT
-
SJO
1 stop12h 23m
American Airlines
mar. 5/122:22 pm
SJO
-
ONT
2 stops19h 17m
American Airlines
Deal found 1/24$409
This Mytrip deal was found by Cheapflights users on 1/23. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 3/1211:30 pm
ONT
-
SJO
1 stop10h 55m
Avianca
jue. 3/193:05 pm
SJO
-
ONT
1 stop7h 50m
Avianca
Deal found 1/23$419
This American Airlines deal was found by Cheapflights users on 1/26. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 9/2411:59 pm
ONT
-
SJO
1 stop16h 51m
American Airlines
jue. 10/82:45 pm
SJO
-
ONT
2 stops18h 45m
American Airlines
Deal found 1/26$449
This Avianca deal was found by Cheapflights users on 1/24. 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.
mar. 2/1710:30 pm
ONT
-
SJO
1 stop10h 55m
Avianca
mar. 2/245:00 am
SJO
-
ONT
1 stop17h 55m
Avianca
Deal found 1/24$458
This United Airlines deal was found by Cheapflights users on 1/23. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 2/66:00 am
ONT
-
SJO
1 stop10h 16m
United Airlines
dom. 2/158:45 am
SJO
-
ONT
1 stop15h 14m
United Airlines
Deal found 1/23$459
This Gotogate deal was found by Cheapflights users on 1/26. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 4/1811:35 pm
ONT
-
SJO
1 stop10h 55m
Avianca
sáb. 4/259:40 am
SJO
-
ONT
1 stop13h 05m
Avianca
Deal found 1/26$460
This Priceline deal was found by Cheapflights users on 1/24. 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.
jue. 3/510:30 pm
ONT
-
SJO
1 stop13h 10m
Avianca
mar. 3/173:05 pm
SJO
-
ONT
1 stop7h 50m
Avianca
Deal found 1/24$469

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 enero 26, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$398
(American Airlines)

One-way from

$147
(Kiwi.com)

Popular in

February

Cheapest in

October

Average price

$483
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 ($62 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 January 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 enero 26, 2026.
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

mar. 6/2

5:55 am-7:37 pm

1 stop12h 42m

San José Juan Santamaria Intl

mar. 6/9

12:30 am-12:20 pm

2 stops12h 50m

$449

OntarioSan José

ONT - SJO

ONTSJO

Ontario

lun. 2/23

6:00 am-8:39 pm

1 stop12h 39m

San José Juan Santamaria Intl

jue. 2/26

9:40 am-5:41 pm

1 stop10h 01m

$503

OntarioSan José

ONT - SJO

ONTSJO

Ontario

dom. 2/22

6:00 am-6:16 pm

1 stop10h 16m

San José Juan Santamaria Intl

vie. 2/27

9:40 am-10:57 pm

1 stop15h 17m

$503

OntarioSan José

ONT - SJO

ONTSJO

Ontario

vie. 2/6

6:00 am-8:39 pm

1 stop12h 39m

San José Juan Santamaria Intl

sáb. 2/14

9:40 am-5:41 pm

1 stop10h 01m

$503

OntarioSan José

ONT - SJO

ONTSJO

Ontario

vie. 2/6

6:00 am-8:39 pm

1 stop12h 39m

San José Juan Santamaria Intl

dom. 2/8

7:30 am-8:58 pm

1 stop15h 28m

$503

OntarioSan José

ONT - SJO

ONTSJO

Ontario

mié. 3/4

8:00 am-6:16 pm

1 stop8h 16m

San José Juan Santamaria Intl

lun. 3/9

11:35 am-10:36 pm

1 stop12h 01m

$503

OntarioSan José

ONT - SJO

ONTSJO

Ontario

mar. 3/3

8:00 am-6:16 pm

1 stop8h 16m

San José Juan Santamaria Intl

mié. 3/11

5:30 am-10:36 pm

1 stop18h 06m

$503

OntarioSan José

ONT - SJO

ONTSJO

Ontario

vie. 2/20

9:08 pm-8:32 am

1 stop9h 24m

San José Juan Santamaria Intl

vie. 2/27

9:40 am-10:57 pm

1 stop15h 17m

$503

OntarioSan José

ONT - SJO

ONTSJO

Ontario

lun. 3/2

9:06 pm-1:15 pm

2 stops14h 09m

San José Juan Santamaria Intl

lun. 3/9

11:35 am-10:36 pm

1 stop12h 01m

$508

OntarioSan José

ONT - SJO

ONTSJO

Ontario

mar. 3/3

1:45 pm-8:39 pm

2 stops28h 54m

San José Juan Santamaria Intl

mar. 3/10

7:45 am-10:57 pm

2 stops16h 12m

$508

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/23

Showing 1-10 of 21 results
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 January.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
OvagoPrice Accuracy2 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 $152). Flying from Ontario to San José in December is currently the most expensive (average of $294). 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 enero 26, 2026.
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
9,200 reviews

Entertainment

7.1

Comfort

7.3

Food

6.6

Boarding

7.7

Overall

7.4

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
9,200 reviews
United Airlines
7.4
Good
9,200 reviews

Entertainment

7.1

Comfort

7.3

Food

6.6

Boarding

7.7

Overall

7.4

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
11,189 reviews
United Airlines
7.4
Good
9,200 reviews

Entertainment

7.1

Comfort

7.3

Food

6.6

Boarding

7.7

Overall

7.4

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
2,491 reviews
United Airlines
7.4
Good
9,200 reviews

Entertainment

7.1

Comfort

7.3

Food

6.6

Boarding

7.7

Overall

7.4

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 12h 42m. 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 $280 on this airline. Additional options worth looking into are United Airlines and American Airlines, starting at $349 and $366 round-trip. Users have found that Avianca is 45% 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 $169 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 $294). 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

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Ontario to San José

See prices for flight routes from nearby airports that may be better suited for you.
Los Angeles to San José flights
San Francisco to San José flights
Los Angeles to Liberia flights
San Francisco to Liberia flights
Burbank to San José flights
San Diego to San José flights
Sacramento to San José flights
San Diego to Liberia flights
Ontario to Liberia flights
Santa Ana to San José flights
San Jose to San José flights
Las Vegas to San José flights
Oakland to San José flights
Las Vegas to Liberia flights
Sacramento to Liberia flights
San Jose to Liberia flights
Santa Ana to Liberia flights
Reno to San José flights
Reno to Liberia flights
Oakland to Liberia flights
Medford to San José flights
Palm Springs to San José flights
Fresno to San José flights
Burbank to Liberia flights
Santa Rosa to San José flights
Palm Springs to Liberia flights
Tijuana to San José flights
Monterey to San José flights
Redding to Liberia flights
Long Beach to Liberia flights
Santa Rosa to Liberia flights
Medford to Liberia flights
Long Beach to San José flights
San Luis Obispo to San José flights
Arcata to Liberia flights
Fresno to Liberia flights
Monterey to Liberia flights
Yuma to San José flights

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 enero 26, 2026.
AirlineCheapestAverageFlexibilityOn-time
AviancaCheapest$280Average$528FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$349Average$487FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$366Average$574FlexibilityNo cancel feeOn-time71%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.