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Cheap flights from Ontario to San José from $156

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 8/27. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Find the cheapest flights from Ontario to San José (ONT-SJO)

Cheap round-trip flights

American Airlines Logo
10:35 pm - 7:42 pmONT-SJO
20h 07m2 stops
American Airlines Logo
6:00 am - 9:24 pmSJO-ONT
16h 24m2 stops
$356American Airlines
Find Deal
vie., sep. 19 - mié., sep. 24
Avianca Logo
11:25 pm - 11:15 amONT-SJO
10h 50m1 stop
Avianca Logo
3:05 pm - 9:55 pmSJO-ONT
7h 50m1 stop
$362Avianca
Find Deal
mar., sep. 23 - mar., oct. 7
Avianca Logo
11:25 pm - 11:15 amONT-SJO
10h 50m1 stop
Avianca Logo
3:05 pm - 9:55 pmSJO-ONT
7h 50m1 stop
$368Avianca
Find Deal
mar., sep. 2 - mar., sep. 9
American Airlines Logo
11:59 pm - 6:16 pmONT-SJO
17h 17m1 stop
American Airlines Logo
6:00 am - 10:18 pmSJO-ONT
17h 18m1 stop
$376American Airlines
Find Deal
sáb., oct. 11 - jue., oct. 16
Avianca Logo
11:25 pm - 11:15 amONT-SJO
10h 50m1 stop
Avianca Logo
5:05 am - 9:55 pmSJO-ONT
17h 50m1 stop
$378Avianca
Find Deal
sáb., sep. 20 - sáb., sep. 27
American Airlines Logo
10:35 pm - 7:42 pmONT-SJO
20h 07m2 stops
American Airlines Logo
6:00 am - 11:59 pmSJO-ONT
18h 59m1 stop
$380American Airlines
Find Deal
mié., oct. 1 - jue., oct. 9
American Airlines Logo
7:30 pm - 12:19 pmONT-SJO
14h 49m2 stops
American Airlines Logo
6:22 am - 10:15 pmSJO-ONT
17h 53m1 stop
$385American Airlines
Find Deal
jue., nov. 6 - dom., nov. 9
United Airlines Logo
6:50 pm - 7:15 amONT-SJO
11h 25m1 stop
United Airlines Logo
8:37 am - 5:37 pmSJO-ONT
10h 00m1 stop
$421United Airlines
Find Deal
sáb., sep. 6 - mié., sep. 10
Delta Logo
10:00 pm - 12:08 pmONT-SJO
13h 08m1 stop
Delta Logo
1:35 pm - 10:23 pmSJO-ONT
9h 48m1 stop
$430Delta
Find Deal
vie., sep. 26 - vie., oct. 3
United Airlines Logo
6:50 pm - 7:15 amONT-SJO
11h 25m1 stop
United Airlines Logo
8:37 am - 5:37 pmSJO-ONT
10h 00m1 stop
$453United Airlines
Find Deal
vie., sep. 5 - mar., sep. 9

American Airlines flights from Ontario to San José, San José Province

Our best American Airlines deals on Ontario to San José, San José Province flight tickets
American Airlines
Sep 19
ONT10:35 pmOntario
20h 07m
2 stops
SJO7:42 pmSan José Juan Santamaria Intl
Sep 24
SJO6:00 amSan José Juan Santamaria Intl
16h 24m
2 stops
ONT9:24 pmOntario
$356
Find similar
American Airlines
Oct 11
ONT11:59 pmOntario
17h 17m
1 stop
SJO6:16 pmSan José Juan Santamaria Intl
Oct 16
SJO6:00 amSan José Juan Santamaria Intl
17h 18m
1 stop
ONT10:18 pmOntario
$376
Find similar
American Airlines
Oct 1
ONT10:35 pmOntario
20h 07m
2 stops
SJO7:42 pmSan José Juan Santamaria Intl
Oct 9
SJO6:00 amSan José Juan Santamaria Intl
18h 59m
1 stop
ONT11:59 pmOntario
$380
Find similar

United Airlines flights from Ontario to San José, San José Province

Our best United Airlines deals on Ontario to San José, San José Province flight tickets
United Airlines
Sep 6
ONT6:50 pmOntario
11h 25m
1 stop
SJO7:15 amSan José Juan Santamaria Intl
Sep 10
SJO8:37 amSan José Juan Santamaria Intl
10h 00m
1 stop
ONT5:37 pmOntario
$421
Find similar
United Airlines
Sep 5
ONT6:50 pmOntario
11h 25m
1 stop
SJO7:15 amSan José Juan Santamaria Intl
Sep 9
SJO8:37 amSan José Juan Santamaria Intl
10h 00m
1 stop
ONT5:37 pmOntario
$453
Find similar
United Airlines
Sep 5
ONT6:50 pmOntario
11h 25m
1 stop
SJO7:15 amSan José Juan Santamaria Intl
Sep 9
SJO1:30 pmSan José Juan Santamaria Intl
8h 55m
1 stop
ONT9:25 pmOntario
$462
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Ontario to San José, San José Province 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 agosto 21, 2025.
Use the filters below to find and compare flights from Ontario to San José, San José Province that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

OntarioSan José

ONT - SJO

ONTSJO

Ontario

vie. 9/19

10:35 pm-7:42 pm

2 stops20h 07m

San José Juan Santamaria Intl

mié. 9/24

6:00 am-9:24 pm

2 stops16h 24m

$356

OntarioSan José

ONT - SJO

ONTSJO

Ontario

mar. 9/23

11:25 pm-11:15 am

1 stop10h 50m

San José Juan Santamaria Intl

mar. 10/7

3:05 pm-9:55 pm

1 stop7h 50m

$362

OntarioSan José

ONT - SJO

ONTSJO

Ontario

mar. 9/2

11:25 pm-11:15 am

1 stop10h 50m

San José Juan Santamaria Intl

mar. 9/9

3:05 pm-9:55 pm

1 stop7h 50m

$368

OntarioSan José

ONT - SJO

ONTSJO

Ontario

sáb. 10/11

11:59 pm-6:16 pm

1 stop17h 17m

San José Juan Santamaria Intl

jue. 10/16

6:00 am-10:18 pm

1 stop17h 18m

$376

OntarioSan José

ONT - SJO

ONTSJO

Ontario

sáb. 9/20

11:25 pm-11:15 am

1 stop10h 50m

San José Juan Santamaria Intl

sáb. 9/27

5:05 am-9:55 pm

1 stop17h 50m

$378

OntarioSan José

ONT - SJO

ONTSJO

Ontario

mié. 10/1

10:35 pm-7:42 pm

2 stops20h 07m

San José Juan Santamaria Intl

jue. 10/9

6:00 am-11:59 pm

1 stop18h 59m

$380

OntarioSan José

ONT - SJO

ONTSJO

Ontario

jue. 11/6

7:30 pm-12:19 pm

2 stops14h 49m

San José Juan Santamaria Intl

dom. 11/9

6:22 am-10:15 pm

1 stop17h 53m

$385

OntarioSan José

ONT - SJO

ONTSJO

Ontario

sáb. 9/6

6:50 pm-7:15 am

1 stop11h 25m

San José Juan Santamaria Intl

mié. 9/10

8:37 am-5:37 pm

1 stop10h 00m

$421

OntarioSan José

ONT - SJO

ONTSJO

Ontario

vie. 9/26

10:00 pm-12:08 pm

1 stop13h 08m

San José Juan Santamaria Intl

vie. 10/3

1:35 pm-10:23 pm

1 stop9h 48m

$430

OntarioSan José

ONT - SJO

ONTSJO

Ontario

vie. 9/5

6:50 pm-7:15 am

1 stop11h 25m

San José Juan Santamaria Intl

mar. 9/9

8:37 am-5:37 pm

1 stop10h 00m

$453

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, San José Province

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, San José Province?

The month of October is, on average, the cheapest month to fly to San José, San José Province from Ontario, with most prices found around $423. If you’re not able to fly to San José, San José Province in October, then August is your next best option. Flight prices from Ontario to San José, San José Province during August average around $440.

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

The cheapest day to depart from Ontario to San José, San José Province is on a Monday when prices can be found for as low as $481. The most expensive day to fly to San José, San José Province is Friday, with ticket prices averaging around $548.

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

At noon is the cheapest time of day to fly from Ontario to San José, San José Province when you can find flight prices for as low as $404. Flying to San José, San José Province at noon is an ideal time because this is during off-peak travel hours. In the afternoon is when there is more demand to fly to San José, San José Province, so prices are often more expensive at around $540 per ticket.

When to book flights from Ontario to San José, San José Province

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

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

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

Direct flights

None
There are no direct flights from Ontario to San José, San José Province. There are no popular flight routes from Ontario to San José, San José Province.
Search flight deals

  • 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 9h 55m 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, San José Province?

Best airlines flying from Ontario to San José, San José Province

Compare and see reviews for airlines that fly from Ontario to San José, San José Province with momondo
Airline
Rating
Free Cancellation
Price
AviancaPriceFrom $317Free CancellationRating
6.7
2,415 reviews
Search Avianca flights
United AirlinesPriceFrom $349Free CancellationRating
7.4
8,930 reviews
Search United Airlines flights
American AirlinesPriceFrom $399Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
SouthwestPriceFrom $550Free CancellationRating
8.0
4,245 reviews
Search Southwest 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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