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Cheap flights from Ontario to San José from $152

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 11/8. 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
0 bags

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Find the cheapest flights from Ontario to San José

Cheap round-trip flights

Enter your travel dates to find the best prices.
Avianca Logo
10:30 pm - 11:25 amONT-SJO
10h 55m1 stop
Avianca Logo
9:35 am - 8:55 pmSJO-ONT
13h 20m1 stop
$353Avianca
Find Deal
Sat, Nov 8 - Sat, Nov 15
Avianca Logo
11:30 pm - 1:40 pmONT-SJO
13h 10m1 stop
Avianca Logo
9:35 am - 9:55 pmSJO-ONT
13h 20m1 stop
$368Avianca
Find Deal
Sat, Mar 14 - Thu, Mar 19
United Airlines Logo
6:00 am - 8:39 pmONT-SJO
12h 39m1 stop
United Airlines Logo
8:45 am - 9:58 pmSJO-ONT
15h 13m1 stop
$372United Airlines
Find Deal
Thu, Jan 15 - Wed, Jan 21
Avianca Logo
10:30 pm - 11:25 amONT-SJO
10h 55m1 stop
Avianca Logo
3:05 pm - 8:55 pmSJO-ONT
7h 50m1 stop
$375Avianca
Find Deal
Thu, Jan 15 - Thu, Jan 22
American Airlines Logo
7:30 pm - 3:01 pmONT-SJO
17h 31m2 stops
American Airlines Logo
6:38 am - 6:45 pmSJO-ONT
14h 07m1 stop
$376American Airlines
Find Deal
Thu, Jan 29 - Mon, Feb 2
American Airlines Logo
3:04 pm - 1:39 pmONT-SJO
20h 35m2 stops
American Airlines Logo
3:38 pm - 9:55 amSJO-ONT
20h 17m2 stops
$378American Airlines
Find Deal
Wed, Dec 10 - Wed, Dec 17
Avianca Logo
10:30 pm - 11:25 amONT-SJO
10h 55m1 stop
Avianca Logo
9:35 am - 8:55 pmSJO-ONT
13h 20m1 stop
$379Avianca
Find Deal
Sat, Jan 17 - Sat, Jan 24
Multiple Airlines Logo
10:30 pm - 8:40 amONT-SJO
8h 10m1 stop
Multiple Airlines Logo
12:22 pm - 11:59 pmSJO-ONT
37h 37m2 stops
$471Multiple Airlines
Find Deal
Sun, Jan 18 - Fri, Jan 23
Multiple Airlines Logo
6:30 am - 1:20 amONT-SJO
16h 50m2 stops
Multiple Airlines Logo
3:05 pm - 8:55 pmSJO-ONT
7h 50m1 stop
$476Multiple Airlines
Find Deal
Mon, Jan 12 - Thu, Jan 22
United Airlines Logo
6:00 am - 6:16 pmONT-SJO
10h 16m1 stop
United Airlines Logo
9:40 am - 5:43 pmSJO-ONT
10h 03m1 stop
$482United Airlines
Find Deal
Fri, Jan 16 - Thu, Jan 22

United Airlines flights from Ontario to San José

Our best United Airlines deals on Ontario to San José flight tickets
United Airlines
Jan 15
ONT6:00 amOntario
12h 39m
1 stop
SJO8:39 pmSan José Juan Santamaria Intl
Jan 21
SJO8:45 amSan José Juan Santamaria Intl
15h 13m
1 stop
ONT9:58 pmOntario
$372
Find similar
United Airlines
Oct 30
ONT6:38 pmOntario
11h 54m
1 stop
SJO7:32 amSan José Juan Santamaria Intl
Nov 1
SJO7:45 amSan José Juan Santamaria Intl
13h 59m
2 stops
ONT8:44 pmOntario
$376
Find similar
United Airlines
Jan 16
ONT6:00 amOntario
10h 16m
1 stop
SJO6:16 pmSan José Juan Santamaria Intl
Jan 22
SJO9:40 amSan José Juan Santamaria Intl
10h 03m
1 stop
ONT5:43 pmOntario
$482
Find similar

Avianca flights from Ontario to San José

Our best Avianca deals on Ontario to San José flight tickets
Avianca
Nov 8
ONT10:30 pmOntario
10h 55m
1 stop
SJO11:25 amSan José Juan Santamaria Intl
Nov 15
SJO9:35 amSan José Juan Santamaria Intl
13h 20m
1 stop
ONT8:55 pmOntario
$353
Find similar
Avianca
Mar 14
ONT11:30 pmOntario
13h 10m
1 stop
SJO1:40 pmSan José Juan Santamaria Intl
Mar 19
SJO9:35 amSan José Juan Santamaria Intl
13h 20m
1 stop
ONT9:55 pmOntario
$368
Find similar
Avianca
Jan 15
ONT10:30 pmOntario
10h 55m
1 stop
SJO11:25 amSan José Juan Santamaria Intl
Jan 22
SJO3:05 pmSan José Juan Santamaria Intl
7h 50m
1 stop
ONT8:55 pmOntario
$375
Find similar

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 October 27, 2025.
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

OntarioSan José

ONT - SJO

ONTSJO

Ontario

Sat 11/8

10:30 pm-11:25 am

1 stop10h 55m

San José Juan Santamaria Intl

Sat 11/15

9:35 am-8:55 pm

1 stop13h 20m

$353

OntarioSan José

ONT - SJO

ONTSJO

Ontario

Sat 3/14

11:30 pm-1:40 pm

1 stop13h 10m

San José Juan Santamaria Intl

Thu 3/19

9:35 am-9:55 pm

1 stop13h 20m

$368

OntarioSan José

ONT - SJO

ONTSJO

Ontario

Thu 1/15

6:00 am-8:39 pm

1 stop12h 39m

San José Juan Santamaria Intl

Wed 1/21

8:45 am-9:58 pm

1 stop15h 13m

$372

OntarioSan José

ONT - SJO

ONTSJO

Ontario

Thu 1/15

10:30 pm-11:25 am

1 stop10h 55m

San José Juan Santamaria Intl

Thu 1/22

3:05 pm-8:55 pm

1 stop7h 50m

$375

OntarioSan José

ONT - SJO

ONTSJO

Ontario

Thu 1/29

7:30 pm-3:01 pm

2 stops17h 31m

San José Juan Santamaria Intl

Mon 2/2

6:38 am-6:45 pm

1 stop14h 07m

$376

OntarioSan José

ONT - SJO

ONTSJO

Ontario

Wed 12/10

3:04 pm-1:39 pm

2 stops20h 35m

San José Juan Santamaria Intl

Wed 12/17

3:38 pm-9:55 am

2 stops20h 17m

$378

OntarioSan José

ONT - SJO

ONTSJO

Ontario

Sat 1/17

10:30 pm-11:25 am

1 stop10h 55m

San José Juan Santamaria Intl

Sat 1/24

9:35 am-8:55 pm

1 stop13h 20m

$379

OntarioSan José

ONT - SJO

ONTSJO

Ontario

Sun 1/18

10:30 pm-8:40 am

1 stop8h 10m

San José Juan Santamaria Intl

Fri 1/23

12:22 pm-11:59 pm

2 stops37h 37m

$471

OntarioSan José

ONT - SJO

ONTSJO

Ontario

Mon 1/12

6:30 am-1:20 am

2 stops16h 50m

San José Juan Santamaria Intl

Thu 1/22

3:05 pm-8:55 pm

1 stop7h 50m

$476

OntarioSan José

ONT - SJO

ONTSJO

Ontario

Fri 1/16

6:00 am-6:16 pm

1 stop10h 16m

San José Juan Santamaria Intl

Thu 1/22

9:40 am-5:43 pm

1 stop10h 03m

$482

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 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 September 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 Monday. momondo users have found tickets for Monday departures for as low as $467. However, this price may fluctuate depending on the airline, the season, and holidays. Flights from Ontario to San José on a Friday will generally be more expensive and average around $532. 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 at noon. Our users have found flights to San José at noon for as low as $295. Flights in the afternoon are often more expensive with an average ticket price of $548.

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

You could potentially save up to 6% on your flight if you consider stops on a Ontario to San José flight.

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

Direct flights

None
There are no direct flights from Ontario to San José. There are no popular flight routes from Ontario to San José.
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  • 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
United AirlinesPriceFrom $351Free CancellationRating
7.4
8,997 reviews
Search United Airlines flights
American AirlinesPriceFrom $366Free CancellationRating
7.2
11,031 reviews
Search American Airlines flights
AviancaPriceFrom $413Free CancellationRating
6.6
2,464 reviews
Search Avianca 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
Alajuela
Monteverde
Heredia
Dominical
Santa Elena
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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