HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
San José

$157+ 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 9/19. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — SJO
Aug 2 — Aug 91
Sat 8/2
Sat 8/9
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

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 28, 2025.

Round-trip from

$352
(American Airlines)

One-way from

$157
(Trip.com)

Popular in

December

Cheapest in

October

Average price

$540
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. 31% potential increase in price ($290 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 16% potential price decrease ($93 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2025
Search Deals

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 July 28, 2025.

This American Airlines deal was found by Cheapflights users on 7/28. 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.
Sat 10/1811:59 pmONT - SJO
1 stop17h 17mAmerican Airlines
Tue 10/216:44 amSJO - ONT
1 stop10h 42mAmerican Airlines
Deal found 7/28$352
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/166:00 amONT - SJO
1 stop12h 37mUnited Airlines
Wed 8/208:37 amSJO - ONT
1 stop10h 00mUnited Airlines
Deal found 7/27$379
This Priceline 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/1111:25 pmONT - SJO
1 stop13h 05mAvianca
Tue 9/169:35 amSJO - ONT
1 stop13h 20mAvianca
Deal found 7/27$396
This CheapOair 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/181:02 amONT - SJO
1 stop20h 51mMultiple Airlines
Fri 11/284:13 pmSJO - ONT
1 stop8h 59mMultiple Airlines
Deal found 7/27$477

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 28, 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 10/18

11:59 pm-6:16 pm

1 stop17h 17m

San José Juan Santamaria Intl

Tue 10/21

6:44 am-4:26 pm

1 stop10h 42m

$352

OntarioSan José

ONT - SJO

ONTSJO

Ontario

Sat 8/16

6:00 am-7:37 pm

1 stop12h 37m

San José Juan Santamaria Intl

Wed 8/20

8:37 am-5:37 pm

1 stop10h 00m

$379

OntarioSan José

ONT - SJO

ONTSJO

Ontario

Thu 9/11

11:25 pm-1:30 pm

1 stop13h 05m

San José Juan Santamaria Intl

Tue 9/16

9:35 am-9:55 pm

1 stop13h 20m

$396

OntarioSan José

ONT - SJO

ONTSJO

Ontario

Fri 9/19

12:28 pm-11:14 am

2 stops21h 46m

$157

OntarioSan José

ONT - SJO

ONTSJO

Ontario

Wed 8/20

6:17 am-8:15 pm

2 stops12h 58m

$160

OntarioSan José

ONT - SJO

ONTSJO

Ontario

Tue 9/9

6:10 am-7:42 pm

2 stops12h 32m

$196

OntarioSan José

ONT - SJO

ONTSJO

Ontario

Tue 8/26

11:25 pm-1:30 pm

1 stop13h 05m

$212

OntarioSan José

ONT - SJO

ONTSJO

Ontario

Wed 10/1

10:56 pm-1:00 pm

1 stop13h 04m

$216

OntarioSan José

ONT - SJO

ONTSJO

Ontario

Mon 9/22

6:50 pm-12:26 pm

2 stops16h 36m

$220

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/28

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 July 28, 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 July 28, 2025.
Read reviews from past customers who have flown United Airlines, JetBlue, 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.
United Airlines
7.4
Good
8,892 reviews

Food

6.6

Overall

7.4

Boarding

7.7

Crew

8.1

Comfort

7.3

Entertainment

7.1

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
8,892 reviews
United Airlines
7.4
Good
8,892 reviews

Food

6.6

Overall

7.4

Boarding

7.7

Crew

8.1

Comfort

7.3

Entertainment

7.1

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??
JetBlue
7.3
Good
2,914 reviews
United Airlines
7.4
Good
8,892 reviews

Food

6.6

Overall

7.4

Boarding

7.7

Crew

8.1

Comfort

7.3

Entertainment

7.1

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
10,000 reviews
United Airlines
7.4
Good
8,892 reviews

Food

6.6

Overall

7.4

Boarding

7.7

Crew

8.1

Comfort

7.3

Entertainment

7.1

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??
Iberia
7.0
Good
2,857 reviews
United Airlines
7.4
Good
8,892 reviews

Food

6.6

Overall

7.4

Boarding

7.7

Crew

8.1

Comfort

7.3

Entertainment

7.1

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
6.7
Okay
2,386 reviews
United Airlines
7.4
Good
8,892 reviews

Food

6.6

Overall

7.4

Boarding

7.7

Crew

8.1

Comfort

7.3

Entertainment

7.1

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.

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

    Flying on American 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 United Airlines and Avianca, with the lowest prices starting at $379 and $396, respectively. You may be able to fly from Ontario to San José, San José Province for 44% 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 $160 on American Airlines. Other airlines that offer cheap prices include Iberia from $196 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

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
Reno to San José flights
San Francisco to Liberia flights
Las Vegas to San José flights
Oakland to San José flights
Ontario to Liberia flights
San Diego to San José flights
San Jose to San José flights
San Jose to Liberia flights
Burbank to San José flights
Sacramento to San José flights
San Diego to Liberia flights
Sacramento to Liberia flights
Oakland to Liberia flights
Santa Ana to Liberia flights
Santa Ana to San José flights
Fresno to San José flights
Las Vegas to Liberia flights
Reno to Liberia flights
Palm Springs to San José flights
Burbank to Liberia flights
Palm Springs to Liberia flights
Monterey to San José flights
Fresno to Liberia flights
Medford to San José flights
Long Beach to San José flights
Santa Rosa to Liberia flights
San Luis Obispo to San José flights
Santa Rosa to San José flights
Long Beach to Liberia flights
Redding to Liberia flights
Monterey to Liberia flights
Yuma to San José flights
Arcata to Liberia flights
Medford to Liberia flights
Tijuana to San José flights

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 July 28, 2025.
AirlineCheapestAverageFlexibilityOn-time
AviancaCheapest$317Average$489FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$349Average$534FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$372Average$601FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$616Average$698FlexibilityNo cancel feeOn-time63%

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.