What is the cheapest airline that flies from San José Juan Santamaria Intl to Ontario?

Southwest and United Airlines are the most popular carriers operating from San José Juan Santamaria Intl to Ontario

What airlines fly to Ontario?

Alaska Airlines, Avianca and United Airlines are the top three most popular airlines that fly to Ontario from San José according to our data. Alaska Airlines is the first choice among our users, with 46% of people opting to fly with this airline when traveling to Ontario. Keep in mind that there are 9 different airlines that fly to Ontario on a routine basis, so you have a few additional options to choose from.

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

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

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

As of September 2026, there are 2 operators available to choose from for flights from San José Juan Santamaria Intl Airport to Ontario Airport.

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

Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from San José Juan Santamaria Intl Airport to Ontario Airport.

What documentation or ID do you need to fly to Ontario Airport?

The travel and health documents you'll need for your trip to Ontario Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Ontario Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

$256 Cheap Flights from San José to Ontario in 2026/27

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from San José to Los Angeles

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2:46 pm - 10:57 pmSJO San José Juan Santamaria Intl-ONT Ontario

10h 11m1 stop Dallas/Fort Worth

10:30 pm - 1:07 pmONT Ontario-SJO San José Juan Santamaria Intl

12h 37m1 stop Charlotte Douglas

$445American Airlines

Tue, Nov 3 - Sat, Nov 14

3:54 pm - 11:52 amSJO San José Juan Santamaria Intl-ONT Ontario

21h 58m2 stops Miami Dallas/Fort Worth

10:30 pm - 1:07 pmONT Ontario-SJO San José Juan Santamaria Intl

12h 37m1 stop Charlotte Douglas

$449American Airlines

Tue, Nov 3 - Sat, Nov 14

3:54 pm - 9:40 amSJO San José Juan Santamaria Intl-ONT Ontario

19h 46m2 stops Miami Dallas/Fort Worth

2:22 pm - 1:07 pmONT Ontario-SJO San José Juan Santamaria Intl

20h 45m2 stops Dallas/Fort Worth Charlotte Douglas

$449American Airlines

Tue, Nov 3 - Sat, Nov 14

2:15 pm - 10:00 pmSJO San José Juan Santamaria Intl-ONT Ontario

9h 45m1 stop Houston Hobby

2:50 pm - 1:15 pmONT Ontario-SJO San José Juan Santamaria Intl

20h 25m2 stops Phoenix Sky Harbor Intl Orlando

$511Southwest

Tue, Nov 3 - Sat, Nov 14

3:10 pm - 9:45 pmSJO San José Juan Santamaria Intl-ONT Ontario

7h 35m1 stop San Salvador El Salvador Intl

11:35 pm - 8:45 amONT Ontario-SJO San José Juan Santamaria Intl

8h 10m1 stop San Salvador El Salvador Intl

$530Avianca

Sat, Oct 10 - Tue, Oct 13

3:10 pm - 8:50 pmSJO San José Juan Santamaria Intl-ONT Ontario

7h 40m1 stop San Salvador El Salvador Intl

10:45 pm - 8:50 amONT Ontario-SJO San José Juan Santamaria Intl

8h 05m1 stop San Salvador El Salvador Intl

$530Avianca

Thu, Dec 24 - Thu, Jan 7

9:45 am - 8:50 pmSJO San José Juan Santamaria Intl-ONT Ontario

13h 05m1 stop San Salvador El Salvador Intl

10:45 pm - 8:50 amONT Ontario-SJO San José Juan Santamaria Intl

8h 05m1 stop San Salvador El Salvador Intl

$531Avianca

Tue, Nov 3 - Sat, Nov 14

12:35 pm - 9:40 pmSJO San José Juan Santamaria Intl-ONT Ontario

11h 05m1 stop Houston George Bush Intcntl

5:45 am - 8:39 pmONT Ontario-SJO San José Juan Santamaria Intl

12h 54m1 stop Houston George Bush Intcntl

$533United Airlines

Sat, Nov 14 - Sat, Dec 5

8:45 am - 10:51 pmSJO San José Juan Santamaria Intl-ONT Ontario

15h 06m1 stop San Francisco

9:25 am - 7:32 amONT Ontario-SJO San José Juan Santamaria Intl

21h 07m1 stop San Francisco

$533United Airlines

Fri, Oct 23 - Sat, Oct 31

1:15 am - 8:20 pmSJO San José Juan Santamaria Intl-ONT Ontario

21h 05m2 stops Houston George Bush Intcntl Denver Intl

11:20 am - 6:16 pmONT Ontario-SJO San José Juan Santamaria Intl

28h 56m2 stops San Francisco Houston George Bush Intcntl

$533United Airlines

Mon, Jan 18 - Tue, Feb 9

Cheap last minute flights

Enter your travel dates to find the best prices.

3:10 pm - 9:45 pmSJO San José Juan Santamaria Intl-ONT Ontario

7h 35m1 stop San Salvador El Salvador Intl

11:35 pm - 8:45 amONT Ontario-SJO San José Juan Santamaria Intl

8h 10m1 stop San Salvador El Salvador Intl

$581Avianca

Thu, Sep 17 - Tue, Sep 22

9:40 am - 9:45 pmSJO San José Juan Santamaria Intl-ONT Ontario

13h 05m1 stop San Salvador El Salvador Intl

11:35 pm - 11:30 amONT Ontario-SJO San José Juan Santamaria Intl

10h 55m1 stop San Salvador El Salvador Intl

$581Avianca

Sat, Sep 19 - Thu, Sep 24

9:40 am - 9:45 pmSJO San José Juan Santamaria Intl-ONT Ontario

13h 05m1 stop San Salvador El Salvador Intl

11:35 pm - 11:30 amONT Ontario-SJO San José Juan Santamaria Intl

10h 55m1 stop San Salvador El Salvador Intl

$581Avianca

Thu, Sep 17 - Thu, Sep 24

3:10 pm - 9:45 pmSJO San José Juan Santamaria Intl-ONT Ontario

7h 35m1 stop San Salvador El Salvador Intl

11:35 pm - 8:45 amONT Ontario-SJO San José Juan Santamaria Intl

8h 10m1 stop San Salvador El Salvador Intl

$581Avianca

Thu, Sep 17 - Sat, Sep 26

8:45 am - 8:01 pmSJO San José Juan Santamaria Intl-ONT Ontario

12h 16m1 stop San Francisco

9:25 am - 12:21 pmONT Ontario-SJO San José Juan Santamaria Intl

25h 56m2 stops San Francisco Houston George Bush Intcntl

$600United Airlines

Fri, Sep 18 - Fri, Sep 25

8:45 am - 10:51 pmSJO San José Juan Santamaria Intl-ONT Ontario

15h 06m1 stop San Francisco

1:18 pm - 7:37 pmONT Ontario-SJO San José Juan Santamaria Intl

29h 19m2 stops Denver Intl Houston George Bush Intcntl

$621United Airlines

Thu, Sep 17 - Sat, Sep 19

8:45 am - 10:51 pmSJO San José Juan Santamaria Intl-ONT Ontario

15h 06m1 stop San Francisco

1:56 pm - 7:15 amONT Ontario-SJO San José Juan Santamaria Intl

16h 19m1 stop San Francisco

$621United Airlines

Thu, Sep 17 - Wed, Sep 23

8:45 am - 8:01 pmSJO San José Juan Santamaria Intl-ONT Ontario

12h 16m1 stop San Francisco

1:52 pm - 7:15 amONT Ontario-SJO San José Juan Santamaria Intl

16h 23m1 stop San Francisco

$773Azul

Fri, Sep 18 - Sun, Sep 27

7:00 am - 11:05 pmSJO San José Juan Santamaria Intl-ONT Ontario

17h 05m2 stops Mexico City Benito Juarez Guadalajara Miguel Hidal

12:55 am - 10:00 pmONT Ontario-SJO San José Juan Santamaria Intl

20h 05m2 stops Guadalajara Miguel Hidal Mexico City Benito Juarez

$796Multiple Airlines

Thu, Sep 17 - Wed, Sep 30

5:45 am - 11:05 pmSJO San José Juan Santamaria Intl-ONT Ontario

18h 20m2 stops Cancun Guadalajara Miguel Hidal

12:55 am - 11:15 pmONT Ontario-SJO San José Juan Santamaria Intl

21h 20m2 stops Guadalajara Miguel Hidal Cancun

$842Multiple Airlines

Fri, Sep 18 - Sat, Sep 19

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United Airlines flights from San José to Ontario

Our best United Airlines deals on San José to Ontario flight tickets

United Airlines

Nov 7

SJO9:40 amSan José Juan Santamaria Intl

31h 53m

1 stop

ONT3:33 pmOntario

Nov 24

ONT1:29 pmOntario

29h 10m

2 stops

SJO8:39 pmSan José Juan Santamaria Intl

$533

United Airlines

Oct 22

SJO8:45 amSan José Juan Santamaria Intl

15h 06m

1 stop

ONT10:51 pmOntario

Oct 25

ONT6:00 amOntario

12h 39m

1 stop

SJO7:39 pmSan José Juan Santamaria Intl

$542

United Airlines

Oct 22

SJO8:45 amSan José Juan Santamaria Intl

15h 06m

1 stop

ONT10:51 pmOntario

Oct 25

ONT6:00 amOntario

27h 25m

2 stops

SJO10:25 amSan José Juan Santamaria Intl

$546

Avianca flights from San José to Ontario

Our best Avianca deals on San José to Ontario flight tickets

Avianca

Nov 23

SJO9:40 amSan José Juan Santamaria Intl

15h 08m

1 stop

ONT10:48 pmOntario

Nov 26

ONT12:30 pmOntario

18h 02m

1 stop

SJO8:32 amSan José Juan Santamaria Intl

$591

Avianca

Jan 24

SJO1:15 amSan José Juan Santamaria Intl

22h 25m

1 stop

ONT9:40 pmOntario

Jan 29

ONT6:00 amOntario

12h 39m

1 stop

SJO8:39 pmSan José Juan Santamaria Intl

$604

Avianca

Oct 19

SJO8:45 amSan José Juan Santamaria Intl

12h 46m

1 stop

ONT8:31 pmOntario

Oct 24

ONT11:10 amOntario

19h 05m

1 stop

SJO7:15 amSan José Juan Santamaria Intl

$612

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

San JoséOntario

SJO San José Juan Santamaria Intl - ONT Ontario

SJOONT

San José Juan Santamaria Intl

Tue 11/3

2:46 pm-10:57 pm

1 stop10h 11m

Ontario

Sat 11/14

10:30 pm-1:07 pm

1 stop12h 37m

$445

San JoséOntario

SJO San José Juan Santamaria Intl - ONT Ontario

SJOONT

San José Juan Santamaria Intl

Tue 11/3

3:54 pm-11:52 am

2 stops21h 58m

Ontario

Sat 11/14

10:30 pm-1:07 pm

1 stop12h 37m

$449

San JoséOntario

SJO San José Juan Santamaria Intl - ONT Ontario

SJOONT

San José Juan Santamaria Intl

Tue 11/3

3:54 pm-9:40 am

2 stops19h 46m

Ontario

Sat 11/14

2:22 pm-1:07 pm

2 stops20h 45m

$449

San JoséOntario

SJO San José Juan Santamaria Intl - ONT Ontario

SJOONT

San José Juan Santamaria Intl

Tue 11/3

2:15 pm-10:00 pm

1 stop9h 45m

Ontario

Sat 11/14

2:50 pm-1:15 pm

2 stops20h 25m

$511

Quickest round-trip

San JoséOntario

SJO San José Juan Santamaria Intl - ONT Ontario

SJOONT

San José Juan Santamaria Intl

Sat 10/10

3:10 pm-9:45 pm

1 stop7h 35m

Ontario

Tue 10/13

11:35 pm-8:45 am

1 stop8h 10m

$530

San JoséOntario

SJO San José Juan Santamaria Intl - ONT Ontario

SJOONT

San José Juan Santamaria Intl

Thu 12/24

3:10 pm-8:50 pm

1 stop7h 40m

Ontario

Thu 1/7

10:45 pm-8:50 am

1 stop8h 05m

$530

San JoséOntario

SJO San José Juan Santamaria Intl - ONT Ontario

SJOONT

San José Juan Santamaria Intl

Tue 11/3

9:45 am-8:50 pm

1 stop13h 05m

Ontario

Sat 11/14

10:45 pm-8:50 am

1 stop8h 05m

$531

San JoséOntario

SJO San José Juan Santamaria Intl - ONT Ontario

SJOONT

San José Juan Santamaria Intl

Sat 11/14

12:35 pm-9:40 pm

1 stop11h 05m

Ontario

Sat 12/5

5:45 am-8:39 pm

1 stop12h 54m

$533

San JoséOntario

SJO San José Juan Santamaria Intl - ONT Ontario

SJOONT

San José Juan Santamaria Intl

Fri 10/23

8:45 am-10:51 pm

1 stop15h 06m

Ontario

Sat 10/31

9:25 am-7:32 am

1 stop21h 07m

$533

San JoséOntario

SJO San José Juan Santamaria Intl - ONT Ontario

SJOONT

San José Juan Santamaria Intl

Mon 1/18

1:15 am-8:20 pm

2 stops21h 05m

Ontario

Tue 2/9

11:20 am-6:16 pm

2 stops28h 56m

$533

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

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

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

Prices

Airlines

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

Prices are currently typical for flights on this route.

Typical prices usually range from $504 to $593.
The lowest price recently found on this route was $533.

What is the cheapest month to fly to Ontario?

In general, November is the cheapest month to fly from San José to Ontario. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $383. If you aren’t able to travel during the month of November, then book flights to Ontario from San José during May instead. Flights to Ontario in May, while not as cheap as those in November, still average around $383.

How far in advance should I book a flight from San José to Ontario?

You are more likely to see cheaper flights to Ontario from San José when booking weeks ahead of your departure date. In general, you can expect to find flights to Ontario for around $532 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Ontario from San José for as low as $370 on momondo.

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

You could potentially save up to 43% on your flight if you consider stops on a San José to Ontario flight.

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

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

When to book flights from San José to Ontario

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

Estimated round-trip price

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

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

Best Price Found	$256
Fastest flight time	9h 45m
Direct flights	None

The best one-way flight to Ontario from San José in the past 72 hours is $256. The best round-trip flight deal from San José to Ontario found on momondo in the last 72 hours is $445.

The fastest flight from San José to Ontario takes 9h 45m

There are no direct flights from San José to Ontario. There are no popular flight routes from San José to Ontario.

Search flight deals

Frequently asked questions about flying from San José to Ontario

How far is San José Juan Santamaria Intl to Ontario by plane?
A flight from San José Juan Santamaria Intl to Ontario will travel around 2696.0 mi. Flights usually cover this in 9h 45m, depending on flying conditions and air traffic around both airports.
When did momondo last update prices for flights from San José Juan Santamaria Intl Airport to Ontario Airport?
Prices for flights from San José Juan Santamaria Intl Airport to Ontario Airport refresh daily.
How many operators does momondo search for flights from San José Juan Santamaria Intl Airport to Ontario Airport?
As of September 2026, there are 2 operators available to choose from for flights from San José Juan Santamaria Intl Airport to Ontario Airport.
How old do you have to be to fly from San José Juan Santamaria Intl Airport to Ontario Airport?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from San José Juan Santamaria Intl Airport to Ontario Airport.
What documentation or ID do you need to fly to Ontario Airport?
The travel and health documents you'll need for your trip to Ontario Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Ontario Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.
What is the most popular airline from San José to Ontario?
Based on momondo bookings for flights between San José and Ontario, the leading airline is United Airlines, making up 74% of the total bookings. Other popular airlines include Avianca with 26%.

Best airlines flying from San José to Ontario

Compare and see reviews for airlines that fly from San José to Ontario with momondo

Airline	Rating	Free Cancellation	Price
United Airlines	PriceFrom $267	Free Cancellation	Rating 7.4 10,213 reviews		Search United Airlines flights
Avianca	PriceFrom $387	Free Cancellation	Rating 6.5 2,551 reviews		Search Avianca flights

Why use momondo?

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

It is quick and easy to find San José to Ontario 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 Ontario that suits you.

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

Yes. All flights to Ontario from San José on momondo can be compared and filtered by various policies on offer, including flexible booking.

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

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from San José to Ontario.

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

Price alerts on flights to Ontario from San José 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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Cheap flights from San José to Los Angeles from $256

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from San José to Los Angeles departing on 12/3. 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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United Airlines flights from San José to Ontario

Our best United Airlines deals on San José to Ontario flight tickets

Avianca flights from San José to Ontario

Our best Avianca deals on San José to Ontario flight tickets

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

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

What is the cheapest month to fly to Ontario?

How far in advance should I book a flight from San José to Ontario?

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

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

What is the cheapest airline that flies from San José Juan Santamaria Intl to Ontario?

What airlines fly to Ontario?

When to book flights from San José to Ontario

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

Best Price Found

Fastest flight time

Direct flights

Frequently asked questions about flying from San José to Ontario

Best airlines flying from San José to Ontario

Compare and see reviews for airlines that fly from San José to Ontario with momondo

Why use momondo?

An easier way to manage your Ontario trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to the United States

Airports servicing California

Fly your favorite airline to Los Angeles

Airlines are sorted and displayed according to clicks in the past 7 days on momondo

Cabin classes currently available on flights to Los Angeles

List of cabin classes available on flights landing in Los Angeles. Availability may vary depending on flight origin and airline.

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