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Cheap flights from Ontario to San José from $177

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 5/13. 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.
United Airlines Logo
10:37 am - 7:15 am
ONT
-
SJO
19h 38m
1 stop
United Airlines Logo
8:45 am - 10:59 pm
SJO
-
ONT
15h 14m
1 stop
$404United Airlines
Fri, May 1 - Sun, May 17
American Airlines Logo
11:59 pm - 1:22 pm
ONT
-
SJO
12h 23m
1 stop
American Airlines Logo
2:22 pm - 8:39 am
SJO
-
ONT
19h 17m
2 stops
$409American Airlines
Fri, May 8 - Tue, May 12
American Airlines Logo
11:58 pm - 8:12 pm
ONT
-
SJO
18h 14m
2 stops
American Airlines Logo
1:31 pm - 10:06 am
SJO
-
ONT
22h 35m
2 stops
$438American Airlines
Tue, Feb 17 - Tue, Feb 24
American Airlines Logo
11:59 pm - 1:22 pm
ONT
-
SJO
12h 23m
1 stop
American Airlines Logo
2:08 pm - 10:35 pm
SJO
-
ONT
9h 27m
1 stop
$444American Airlines
Fri, May 8 - Tue, May 12
Avianca Logo
10:30 pm - 1:40 pm
ONT
-
SJO
13h 10m
1 stop
Avianca Logo
3:05 pm - 8:55 pm
SJO
-
ONT
7h 50m
1 stop
$447Avianca
Tue, Feb 17 - Tue, Feb 24
American Airlines Logo
11:59 pm - 7:07 pm
ONT
-
SJO
18h 08m
2 stops
American Airlines Logo
11:35 pm - 10:09 am
SJO
-
ONT
11h 34m
1 stop
$449American Airlines
Sun, May 3 - Sat, May 9
Avianca Logo
10:30 pm - 1:40 pm
ONT
-
SJO
13h 10m
1 stop
Avianca Logo
5:00 am - 8:55 pm
SJO
-
ONT
17h 55m
1 stop
$458Avianca
Tue, Feb 17 - Tue, Feb 24
Avianca Logo
11:35 pm - 11:30 am
ONT
-
SJO
10h 55m
1 stop
Avianca Logo
9:40 am - 9:45 pm
SJO
-
ONT
13h 05m
1 stop
$460Avianca
Sat, Apr 18 - Sat, Apr 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
$469Avianca
Sat, Apr 25 - Sat, May 2
American Airlines Logo
2:39 pm - 12:31 pm
ONT
-
SJO
19h 52m
2 stops
American Airlines Logo
3:59 pm - 11:28 am
SJO
-
ONT
21h 29m
2 stops
$478American Airlines
Tue, Feb 17 - Tue, Feb 24

GOL flights from Ontario to San José

Our best GOL deals on Ontario to San José flight tickets
GOL
Mar 30
ONT11:58 pmOntario
12h 57m
1 stop
SJO1:55 pmSan José Juan Santamaria Intl
Apr 14
SJO2:22 pmSan José Juan Santamaria Intl
23h 56m
2 stops
ONT1:18 pmOntario
$504
GOL
Feb 21
ONT5:02 pmOntario
15h 22m
2 stops
SJO10:24 amSan José Juan Santamaria Intl
Feb 25
SJO12:35 amSan José Juan Santamaria Intl
11h 31m
1 stop
ONT10:06 amOntario
$537
GOL
Apr 26
ONT11:59 pmOntario
12h 23m
1 stop
SJO1:22 pmSan José Juan Santamaria Intl
Apr 29
SJO11:35 pmSan José Juan Santamaria Intl
11h 34m
1 stop
ONT10:09 amOntario
$544

United Airlines flights from Ontario to San José

Our best United Airlines deals on Ontario to San José flight tickets
United Airlines
May 1
ONT10:37 amOntario
19h 38m
1 stop
SJO7:15 amSan José Juan Santamaria Intl
May 17
SJO8:45 amSan José Juan Santamaria Intl
15h 14m
1 stop
ONT10:59 pmOntario
$404
United Airlines
Feb 3
ONT1:24 pmOntario
21h 51m
2 stops
SJO1:15 pmSan José Juan Santamaria Intl
Feb 28
SJO12:35 pmSan José Juan Santamaria Intl
11h 24m
1 stop
ONT9:59 pmOntario
$479
United Airlines
May 3
ONT10:37 amOntario
19h 38m
1 stop
SJO7:15 amSan José Juan Santamaria Intl
May 9
SJO7:55 amSan José Juan Santamaria Intl
15h 03m
1 stop
ONT9:58 pmOntario
$480

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 January 28, 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

OntarioSan José

ONT - SJO

ONTSJO

Ontario

Fri 5/1

10:37 am-7:15 am

1 stop19h 38m

San José Juan Santamaria Intl

Sun 5/17

8:45 am-10:59 pm

1 stop15h 14m

$404

OntarioSan José

ONT - SJO

ONTSJO

Ontario

Fri 5/8

11:59 pm-1:22 pm

1 stop12h 23m

San José Juan Santamaria Intl

Tue 5/12

2:22 pm-8:39 am

2 stops19h 17m

$409

OntarioSan José

ONT - SJO

ONTSJO

Ontario

Tue 2/17

11:58 pm-8:12 pm

2 stops18h 14m

San José Juan Santamaria Intl

Tue 2/24

1:31 pm-10:06 am

2 stops22h 35m

$438

OntarioSan José

ONT - SJO

ONTSJO

Ontario

Fri 5/8

11:59 pm-1:22 pm

1 stop12h 23m

San José Juan Santamaria Intl

Tue 5/12

2:08 pm-10:35 pm

1 stop9h 27m

$444

OntarioSan José

ONT - SJO

ONTSJO

Ontario

Tue 2/17

10:30 pm-1:40 pm

1 stop13h 10m

San José Juan Santamaria Intl

Tue 2/24

3:05 pm-8:55 pm

1 stop7h 50m

$447

OntarioSan José

ONT - SJO

ONTSJO

Ontario

Sun 5/3

11:59 pm-7:07 pm

2 stops18h 08m

San José Juan Santamaria Intl

Sat 5/9

11:35 pm-10:09 am

1 stop11h 34m

$449

OntarioSan José

ONT - SJO

ONTSJO

Ontario

Tue 2/17

10:30 pm-1:40 pm

1 stop13h 10m

San José Juan Santamaria Intl

Tue 2/24

5:00 am-8:55 pm

1 stop17h 55m

$458

OntarioSan José

ONT - SJO

ONTSJO

Ontario

Sat 4/18

11:35 pm-11:30 am

1 stop10h 55m

San José Juan Santamaria Intl

Sat 4/25

9:40 am-9:45 pm

1 stop13h 05m

$460

OntarioSan José

ONT - SJO

ONTSJO

Ontario

Sat 4/25

11:35 pm-8:45 am

1 stop8h 10m

San José Juan Santamaria Intl

Sat 5/2

3:10 pm-9:45 pm

1 stop7h 35m

$469

OntarioSan José

ONT - SJO

ONTSJO

Ontario

Tue 2/17

2:39 pm-12:31 pm

2 stops19h 52m

San José Juan Santamaria Intl

Tue 2/24

3:59 pm-11:28 am

2 stops21h 29m

$478

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 Tuesday. momondo users have found tickets for Tuesday departures for as low as $451. However, this price may fluctuate depending on the airline, the season, and holidays. Flights from Ontario to San José on a Saturday will generally be more expensive and average around $498. 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 $253. Flights in the afternoon are often more expensive with an average ticket price of $527.

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

You could potentially save up to 3% 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 January 2026, prices for Ontario to San José flights are approximately 37% 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

10h 55m

Direct flights

None
The fastest flight from Ontario to San José takes 10h 55m
There are no direct flights from Ontario to San José. There are no popular flight routes from Ontario to San José.
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 10h 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?

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 $280Free CancellationRating
6.6
2,486 reviews
Search Avianca flights
United AirlinesPriceFrom $349Free CancellationRating
7.4
9,212 reviews
Search United Airlines flights
American AirlinesPriceFrom $366Free CancellationRating
7.2
11,201 reviews
Search American 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
Dominical
San Gerardo de Dota
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.

An easier way to manage your San José trip

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