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Cheap flights from Ontario to San José from $231

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 - 7:40 pmONT  Ontario-SJO San José Juan Santamaria Intl
12h 00m2 stops Dallas Love Field Houston Hobby
Southwest Logo
9:00 am - 10:20 pmSJO  San José Juan Santamaria Intl-ONT Ontario
14h 20m2 stops Orlando Denver Intl
$539Southwest
Thu, Oct 15 - Thu, Oct 22
Southwest Logo
6:50 am - 7:40 pmONT  Ontario-SJO San José Juan Santamaria Intl
11h 50m2 stops Denver Intl Houston Hobby
Southwest Logo
1:00 pm - 10:05 pmSJO  San José Juan Santamaria Intl-ONT Ontario
10h 05m2 stops Houston Hobby Phoenix Sky Harbor Intl
$539Southwest
Tue, Oct 13 - Tue, Oct 20
Southwest Logo
3:35 pm - 12:45 pmONT  Ontario-SJO San José Juan Santamaria Intl
20h 10m2 stops Phoenix Sky Harbor Intl Orlando
Southwest Logo
9:00 am - 8:50 pmSJO  San José Juan Santamaria Intl-ONT Ontario
12h 50m2 stops Orlando Dallas Love Field
$539Southwest
Tue, Sep 29 - Tue, Oct 6
Avianca Logo
10:45 pm - 8:50 amONT  Ontario-SJO San José Juan Santamaria Intl
8h 05m1 stop San Salvador El Salvador Intl
Avianca Logo
3:10 pm - 8:50 pmSJO  San José Juan Santamaria Intl-ONT Ontario
7h 40m1 stop San Salvador El Salvador Intl
$559Avianca
Sat, Feb 6 - Tue, Feb 9
Avianca Logo
10:45 pm - 8:50 amONT  Ontario-SJO San José Juan Santamaria Intl
8h 05m1 stop San Salvador El Salvador Intl
Avianca Logo
3:10 pm - 8:50 pmSJO  San José Juan Santamaria Intl-ONT Ontario
7h 40m1 stop San Salvador El Salvador Intl
$559Avianca
Sat, Feb 13 - Tue, Feb 16
Avianca Logo
10:45 pm - 8:50 amONT  Ontario-SJO San José Juan Santamaria Intl
8h 05m1 stop San Salvador El Salvador Intl
Avianca Logo
3:10 pm - 8:50 pmSJO  San José Juan Santamaria Intl-ONT Ontario
7h 40m1 stop San Salvador El Salvador Intl
$559Avianca
Sat, Feb 13 - Sat, Feb 20
American Airlines Logo
7:00 am - 8:21 pmONT  Ontario-SJO San José Juan Santamaria Intl
12h 21m2 stops Dallas/Fort Worth Miami
American Airlines Logo
1:00 pm - 9:11 pmSJO  San José Juan Santamaria Intl-ONT Ontario
9h 11m1 stop Dallas/Fort Worth
$573American Airlines
Fri, Oct 23 - Sat, Oct 31
United Airlines Logo
4:03 pm - 12:21 pmONT  Ontario-SJO San José Juan Santamaria Intl
19h 18m2 stops San Francisco Houston George Bush Intcntl
United Airlines Logo
1:25 pm - 9:59 pmSJO  San José Juan Santamaria Intl-ONT Ontario
9h 34m1 stop Houston George Bush Intcntl
$580United Airlines
Tue, Oct 13 - Fri, Oct 23
United Airlines Logo
6:00 am - 8:39 pmONT  Ontario-SJO San José Juan Santamaria Intl
12h 39m1 stop Houston George Bush Intcntl
United Airlines Logo
9:40 am - 8:15 pmSJO  San José Juan Santamaria Intl-ONT Ontario
12h 35m1 stop San Francisco
$580United Airlines
Wed, Nov 18 - Wed, Nov 25
American Airlines Logo
11:59 pm - 2:00 pmONT  Ontario-SJO San José Juan Santamaria Intl
13h 01m1 stop Dallas/Fort Worth
American Airlines Logo
1:00 pm - 11:52 pmSJO  San José Juan Santamaria Intl-ONT Ontario
11h 52m1 stop Dallas/Fort Worth
$580American Airlines
Tue, Oct 13 - Tue, Oct 20

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Southwest flights from Ontario to San José

Our best Southwest deals on Ontario to San José flight tickets
Southwest
Sep 29
ONT3:35 pmOntario
20h 10m
2 stops
SJO12:45 pmSan José Juan Santamaria Intl
Oct 6
SJO9:00 amSan José Juan Santamaria Intl
12h 50m
2 stops
ONT8:50 pmOntario
$539
Southwest
Oct 13
ONT6:10 amOntario
12h 30m
2 stops
SJO7:40 pmSan José Juan Santamaria Intl
Oct 23
SJO1:30 pmSan José Juan Santamaria Intl
20h 15m
2 stops
ONT8:45 amOntario
$541
Southwest
Dec 6
ONT6:50 pmOntario
15h 30m
2 stops
SJO12:20 pmSan José Juan Santamaria Intl
Dec 13
SJO1:20 pmSan José Juan Santamaria Intl
20h 25m
2 stops
ONT7:45 amOntario
$544

Avianca flights from Ontario to San José

Our best Avianca deals on Ontario to San José flight tickets
Avianca
Feb 13
ONT10:45 pmOntario
8h 05m
1 stop
SJO8:50 amSan José Juan Santamaria Intl
Feb 16
SJO3:10 pmSan José Juan Santamaria Intl
7h 40m
1 stop
ONT8:50 pmOntario
$559
Avianca
Jan 23
ONT10:45 pmOntario
10h 40m
1 stop
SJO11:25 amSan José Juan Santamaria Intl
Feb 2
SJO5:10 amSan José Juan Santamaria Intl
17h 40m
1 stop
ONT8:50 pmOntario
$579
Avianca
Feb 9
ONT10:45 pmOntario
8h 05m
1 stop
SJO8:50 amSan José Juan Santamaria Intl
Feb 16
SJO9:45 amSan José Juan Santamaria Intl
13h 05m
1 stop
ONT8:50 pmOntario
$601

momondo Fare Finder

 
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 Ontario - SJO San José Juan Santamaria Intl

ONTSJO

Ontario

Thu 10/15

6:40 am-7:40 pm

2 stops12h 00m

San José Juan Santamaria Intl

Thu 10/22

9:00 am-10:20 pm

2 stops14h 20m

$539

OntarioSan José

ONT Ontario - SJO San José Juan Santamaria Intl

ONTSJO

Ontario

Tue 10/13

6:50 am-7:40 pm

2 stops11h 50m

San José Juan Santamaria Intl

Tue 10/20

1:00 pm-10:05 pm

2 stops10h 05m

$539

OntarioSan José

ONT Ontario - SJO San José Juan Santamaria Intl

ONTSJO

Ontario

Tue 9/29

3:35 pm-12:45 pm

2 stops20h 10m

San José Juan Santamaria Intl

Tue 10/6

9:00 am-8:50 pm

2 stops12h 50m

$539
Quickest round-trip

OntarioSan José

ONT Ontario - SJO San José Juan Santamaria Intl

ONTSJO

Ontario

Sat 2/6

10:45 pm-8:50 am

1 stop8h 05m

San José Juan Santamaria Intl

Tue 2/9

3:10 pm-8:50 pm

1 stop7h 40m

$559

OntarioSan José

ONT Ontario - SJO San José Juan Santamaria Intl

ONTSJO

Ontario

Sat 2/13

10:45 pm-8:50 am

1 stop8h 05m

San José Juan Santamaria Intl

Tue 2/16

3:10 pm-8:50 pm

1 stop7h 40m

$559

OntarioSan José

ONT Ontario - SJO San José Juan Santamaria Intl

ONTSJO

Ontario

Sat 2/13

10:45 pm-8:50 am

1 stop8h 05m

San José Juan Santamaria Intl

Sat 2/20

3:10 pm-8:50 pm

1 stop7h 40m

$559

OntarioSan José

ONT Ontario - SJO San José Juan Santamaria Intl

ONTSJO

Ontario

Fri 10/23

7:00 am-8:21 pm

2 stops12h 21m

San José Juan Santamaria Intl

Sat 10/31

1:00 pm-9:11 pm

1 stop9h 11m

$573

OntarioSan José

ONT Ontario - SJO San José Juan Santamaria Intl

ONTSJO

Ontario

Tue 10/13

4:03 pm-12:21 pm

2 stops19h 18m

San José Juan Santamaria Intl

Fri 10/23

1:25 pm-9:59 pm

1 stop9h 34m

$580

OntarioSan José

ONT Ontario - SJO San José Juan Santamaria Intl

ONTSJO

Ontario

Wed 11/18

6:00 am-8:39 pm

1 stop12h 39m

San José Juan Santamaria Intl

Wed 11/25

9:40 am-8:15 pm

1 stop12h 35m

$580

OntarioSan José

ONT Ontario - SJO San José Juan Santamaria Intl

ONTSJO

Ontario

Tue 10/13

11:59 pm-2:00 pm

1 stop13h 01m

San José Juan Santamaria Intl

Tue 10/20

1:00 pm-11:52 pm

1 stop11h 52m

$580

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 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 $520. 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 $621. 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 $471. Flights in the morning are often more expensive with an average ticket price of $597.

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

You could potentially save up to 16% 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 September 2026, prices for Ontario to San José flights are approximately 24% more expensive 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

Best Price Found

$231

Fastest flight time

8h 00m

Direct flights

None
The best one-way flight to San José from Ontario in the past 72 hours is $231. The best round-trip flight deal from Ontario to San José found on momondo in the last 72 hours is $539.
The fastest flight from Ontario to San José takes 8h 00m
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 00m 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 $371Free CancellationRating
7.4
10,157 reviews
Search United Airlines flights
American AirlinesPriceFrom $393Free CancellationRating
7.1
12,022 reviews
Search American Airlines flights
AviancaPriceFrom $404Free CancellationRating
6.5
2,557 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
Monteverde
Alajuela
Heredia
Santa Elena
San Gerardo de Dota
Dominical
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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