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Cheap flights from Ontario to San José from $202

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Ontario to San José departing on 8/26. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Ontario to San José

Cheap round-trip flights

Enter your travel dates to find the best prices.
Southwest Logo
6:40 am - 6:40 pm
ONT
-
SJO
11h 00m
2 stops
Southwest Logo
1:40 pm - 10:05 pm
SJO
-
ONT
9h 25m
1 stop
$467Southwest
Tue, Aug 18 - Tue, Sep 29
Southwest Logo
6:00 am - 6:40 pm
ONT
-
SJO
11h 40m
2 stops
Southwest Logo
9:00 am - 8:55 pm
SJO
-
ONT
12h 55m
2 stops
$482Southwest
Thu, Sep 10 - Tue, Sep 22
Southwest Logo
6:40 am - 6:40 pm
ONT
-
SJO
11h 00m
2 stops
Southwest Logo
9:00 am - 10:00 pm
SJO
-
ONT
14h 00m
2 stops
$508Southwest
Tue, Aug 18 - Tue, Sep 29
Avianca Logo
11:35 pm - 8:45 am
ONT
-
SJO
8h 10m
1 stop
Avianca Logo
3:10 pm - 9:45 pm
SJO
-
ONT
7h 35m
1 stop
$509Avianca
Sat, Aug 22 - Tue, Oct 20
Avianca Logo
11:35 pm - 8:45 am
ONT
-
SJO
8h 10m
1 stop
Avianca Logo
3:10 pm - 9:45 pm
SJO
-
ONT
7h 35m
1 stop
$519Avianca
Tue, Aug 11 - Tue, Aug 18
Avianca Logo
11:35 pm - 8:45 am
ONT
-
SJO
8h 10m
1 stop
Avianca Logo
3:10 pm - 9:45 pm
SJO
-
ONT
7h 35m
1 stop
$522Avianca
Tue, Aug 18 - Tue, Aug 25
Avianca Logo
11:35 pm - 8:45 am
ONT
-
SJO
8h 10m
1 stop
Avianca Logo
3:10 pm - 9:45 pm
SJO
-
ONT
7h 35m
1 stop
$523Avianca
Tue, Aug 18 - Tue, Aug 25
Avianca Logo
11:35 pm - 8:45 am
ONT
-
SJO
8h 10m
1 stop
Avianca Logo
5:05 am - 9:45 pm
SJO
-
ONT
17h 40m
1 stop
$529Avianca
Thu, Sep 10 - Tue, Sep 22
Southwest Logo
6:00 am - 6:40 pm
ONT
-
SJO
11h 40m
2 stops
Southwest Logo
9:00 am - 8:55 pm
SJO
-
ONT
12h 55m
2 stops
$535Southwest
Thu, Sep 10 - Tue, Sep 22
Avianca Logo
11:35 pm - 8:45 am
ONT
-
SJO
8h 10m
1 stop
Avianca Logo
3:10 pm - 9:45 pm
SJO
-
ONT
7h 35m
1 stop
$539Avianca
Tue, Aug 4 - Tue, Aug 11

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Avianca flights from Ontario to San José

Our best Avianca deals on Ontario to San José flight tickets
Avianca
Aug 22
ONT11:35 pmOntario
8h 10m
1 stop
SJO8:45 amSan José Juan Santamaria Intl
Oct 20
SJO3:10 pmSan José Juan Santamaria Intl
7h 35m
1 stop
ONT9:45 pmOntario
$509
Avianca
Aug 11
ONT11:35 pmOntario
8h 10m
1 stop
SJO8:45 amSan José Juan Santamaria Intl
Aug 18
SJO3:10 pmSan José Juan Santamaria Intl
7h 35m
1 stop
ONT9:45 pmOntario
$519
Avianca
Aug 18
ONT11:35 pmOntario
8h 10m
1 stop
SJO8:45 amSan José Juan Santamaria Intl
Aug 25
SJO3:10 pmSan José Juan Santamaria Intl
7h 35m
1 stop
ONT9:45 pmOntario
$522

Southwest flights from Ontario to San José

Our best Southwest deals on Ontario to San José flight tickets
Southwest
Aug 18
ONT6:40 amOntario
11h 00m
2 stops
SJO6:40 pmSan José Juan Santamaria Intl
Sep 29
SJO1:40 pmSan José Juan Santamaria Intl
9h 25m
1 stop
ONT10:05 pmOntario
$467
Southwest
Sep 10
ONT6:00 amOntario
11h 40m
2 stops
SJO6:40 pmSan José Juan Santamaria Intl
Sep 22
SJO1:40 pmSan José Juan Santamaria Intl
9h 25m
1 stop
ONT10:05 pmOntario
$482
Southwest
Aug 18
ONT6:40 amOntario
11h 00m
2 stops
SJO6:40 pmSan José Juan Santamaria Intl
Sep 29
SJO9:00 amSan José Juan Santamaria Intl
14h 00m
2 stops
ONT10:00 pmOntario
$508

momondo 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, momondo users made 832,500 searches. Data last updated July 10, 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

OntarioSan José

ONT - SJO

ONTSJO

Ontario

Tue 8/18

6:40 am-6:40 pm

2 stops11h 00m

San José Juan Santamaria Intl

Tue 9/29

1:40 pm-10:05 pm

1 stop9h 25m

$467

OntarioSan José

ONT - SJO

ONTSJO

Ontario

Thu 9/10

6:00 am-6:40 pm

2 stops11h 40m

San José Juan Santamaria Intl

Tue 9/22

9:00 am-8:55 pm

2 stops12h 55m

$482

OntarioSan José

ONT - SJO

ONTSJO

Ontario

Tue 8/18

6:40 am-6:40 pm

2 stops11h 00m

San José Juan Santamaria Intl

Tue 9/29

9:00 am-10:00 pm

2 stops14h 00m

$508
Quickest round-trip

OntarioSan José

ONT - SJO

ONTSJO

Ontario

Sat 8/22

11:35 pm-8:45 am

1 stop8h 10m

San José Juan Santamaria Intl

Tue 10/20

3:10 pm-9:45 pm

1 stop7h 35m

$509

OntarioSan José

ONT - SJO

ONTSJO

Ontario

Tue 8/11

11:35 pm-8:45 am

1 stop8h 10m

San José Juan Santamaria Intl

Tue 8/18

3:10 pm-9:45 pm

1 stop7h 35m

$519

OntarioSan José

ONT - SJO

ONTSJO

Ontario

Tue 8/18

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

$522

OntarioSan José

ONT - SJO

ONTSJO

Ontario

Tue 8/18

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

$523

OntarioSan José

ONT - SJO

ONTSJO

Ontario

Thu 9/10

11:35 pm-8:45 am

1 stop8h 10m

San José Juan Santamaria Intl

Tue 9/22

5:05 am-9:45 pm

1 stop17h 40m

$529

OntarioSan José

ONT - SJO

ONTSJO

Ontario

Thu 9/10

6:00 am-6:40 pm

2 stops11h 40m

San José Juan Santamaria Intl

Tue 9/22

9:00 am-8:55 pm

2 stops12h 55m

$535

OntarioSan José

ONT - SJO

ONTSJO

Ontario

Tue 8/4

11:35 pm-8:45 am

1 stop8h 10m

San José Juan Santamaria Intl

Tue 8/11

3:10 pm-9:45 pm

1 stop7h 35m

$539

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to San José from

How to get the cheapest flight ticket from Ontario to San José

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the typical price of a round-trip flight between Ontario and San José?

What is the cheapest month to fly to San José?

In general, October is the cheapest month to fly from Ontario to San José. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $371. If you don’t want to visit San José in October, then you should wait until December to fly from Ontario, when ticket prices are also cheap, with an average price of $390.

What is the cheapest day to depart on your flight to San José?

On average, the least expensive day to fly to San José from Ontario is on a Tuesday. momondo users have found tickets for Tuesday departures for as low as $499. However, this price may fluctuate depending on the airline, the season, and holidays. Flights from Ontario to San José on a Sunday will generally be more expensive and average around $600. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest time of day to depart on your flight to San José?

Our data shows that the cheapest Ontario to San José flights are usually those with departure times in the morning. Our users have found flights to San José in the morning for as low as $439. Flights in the afternoon are often more expensive with an average ticket price of $571.

Can stopping save me money on Ontario to San José flights?

You could potentially save up to 41% on your flight if you consider stops on a Ontario to San José flight.

How have Ontario to San José flight prices changed over time?

As of July 2026, prices for Ontario to San José flights are approximately 35% cheaper when compared to flights at the same time last year.

When to book flights from Ontario to San José

Are you open to changing your travel dates? Check out the ideal times to fly from Ontario to San José according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Ontario to San José (ONT to SJO) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Ontario to San José

Fastest flight time

8h 10m

Direct flights

None
The fastest flight from Ontario to San José takes 8h 10m
There are no direct flights from Ontario to San José. There are no popular flight routes from Ontario to San José.
Search flight deals

Frequently asked questions about flying from Ontario to San José

  • How far is Ontario to San José Juan Santamaria Intl by plane?

    The distance between Ontario and San José Juan Santamaria Intl is about 2696.0 mi. Typically, this will take 8h 10m by plane in normal conditions.

  • When did momondo last update prices for flights from Ontario Airport to San José Juan Santamaria Intl Airport?

    Prices for flights from Ontario Airport to San José Juan Santamaria Intl Airport are updated daily.

  • How many operators does momondo search for flights from Ontario Airport to San José Juan Santamaria Intl Airport?

  • How old do you have to be to fly from Ontario Airport to San José Juan Santamaria Intl Airport?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Ontario Airport to San José Juan Santamaria Intl Airport.

  • What documentation or ID do you need to fly to San José Juan Santamaria Intl Airport?

    The necessary travel and health documents for your San José Juan Santamaria Intl Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

  • What is the most popular airline from Ontario to San José?

Best airlines flying from Ontario to San José

Compare and see reviews for airlines that fly from Ontario to San José with momondo
Airline
Rating
Free Cancellation
Price
AviancaPriceFrom $215Free CancellationRating
6.5
2,523 reviews
Search Avianca flights
American AirlinesPriceFrom $356Free CancellationRating
7.1
11,798 reviews
Search American Airlines flights
United AirlinesPriceFrom $371Free CancellationRating
7.4
9,966 reviews
Search United Airlines flights

Traveling to a place near San José?

Book flights to San José if you plan to visit one of these locations
Manuel Antonio
Jacó
Monteverde
Alajuela
Heredia
Santa Elena
Dominical
San Gerardo de Dota
Esterillos Este

Why use momondo?

Why should I use momondo to find a flight deal from Ontario to San José?

It is quick and easy to find Ontario to San José flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to San José that suits you.

Can I find flights from Ontario to San José with flexible booking policies on momondo?

Flights from Ontario to San José with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from Ontario to San José?

momondo helps you find the best flight between Ontario and San José by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

I’m not ready to book a flight from Ontario to San José right now. Can momondo alert me if prices change?

Price alerts on flights to San José from Ontario are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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