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Cheap flights from San José to Los Angeles from $249

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 9/29. 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
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from San José to Los Angeles

Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
1:25 pm - 10:59 pm
SJO
-
ONT
34h 34m
2 stops
United Airlines Logo
9:25 am - 12:21 pm
ONT
-
SJO
25h 56m
2 stops
$438United Airlines
Wed, Sep 23 - Mon, Sep 28
United Airlines Logo
7:55 am - 12:12 pm
SJO
-
ONT
29h 17m
2 stops
United Airlines Logo
9:01 am - 7:15 am
ONT
-
SJO
21h 14m
1 stop
$438United Airlines
Thu, Sep 17 - Wed, Sep 23
United Airlines Logo
7:55 am - 12:12 pm
SJO
-
ONT
29h 17m
2 stops
United Airlines Logo
6:08 am - 12:21 pm
ONT
-
SJO
29h 13m
2 stops
$438United Airlines
Thu, Sep 17 - Tue, Sep 22
United Airlines Logo
7:55 am - 12:12 pm
SJO
-
ONT
29h 17m
2 stops
United Airlines Logo
9:25 am - 7:15 am
ONT
-
SJO
20h 50m
1 stop
$438United Airlines
Thu, Sep 17 - Sun, Sep 27
United Airlines Logo
1:25 pm - 6:11 pm
SJO
-
ONT
29h 46m
2 stops
United Airlines Logo
6:08 am - 7:15 am
ONT
-
SJO
24h 07m
1 stop
$438United Airlines
Fri, Sep 18 - Wed, Sep 23
United Airlines Logo
8:45 am - 10:51 pm
SJO
-
ONT
15h 06m
1 stop
United Airlines Logo
9:25 am - 7:15 am
ONT
-
SJO
20h 50m
1 stop
$438United Airlines
Thu, Sep 17 - Sun, Sep 27
United Airlines Logo
8:45 am - 10:51 pm
SJO
-
ONT
15h 06m
1 stop
United Airlines Logo
6:07 am - 7:15 am
ONT
-
SJO
24h 08m
1 stop
$438United Airlines
Fri, Sep 18 - Sun, Sep 27
United Airlines Logo
8:45 am - 8:01 pm
SJO
-
ONT
12h 16m
1 stop
United Airlines Logo
1:56 pm - 7:37 pm
ONT
-
SJO
28h 41m
2 stops
$438United Airlines
Fri, Sep 18 - Wed, Sep 23
American Airlines Logo
2:57 pm - 9:29 am
SJO
-
ONT
19h 32m
2 stops
American Airlines Logo
12:37 pm - 11:59 am
ONT
-
SJO
22h 22m
2 stops
$452American Airlines
Thu, Sep 10 - Sun, Sep 13
American Airlines Logo
7:00 am - 9:34 am
SJO
-
ONT
27h 34m
2 stops
American Airlines Logo
2:22 pm - 8:07 pm
ONT
-
SJO
28h 45m
2 stops
$460American Airlines
Tue, Sep 1 - Tue, Sep 15

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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
Sep 18
SJO8:45 amSan José Juan Santamaria Intl
28h 27m
1 stop
ONT12:12 pmOntario
Sep 23
ONT1:56 pmOntario
16h 19m
1 stop
SJO7:15 amSan José Juan Santamaria Intl
$438
United Airlines
Sep 18
SJO8:45 amSan José Juan Santamaria Intl
15h 06m
1 stop
ONT10:51 pmOntario
Sep 29
ONT1:52 pmOntario
21h 29m
2 stops
SJO12:21 pmSan José Juan Santamaria Intl
$452
United Airlines
Sep 21
SJO8:45 amSan José Juan Santamaria Intl
15h 06m
1 stop
ONT10:51 pmOntario
Sep 28
ONT6:00 amOntario
29h 21m
1 stop
SJO12:21 pmSan José Juan Santamaria Intl
$464

American Airlines flights from San José to Ontario

Our best American Airlines deals on San José to Ontario flight tickets
American Airlines
Sep 24
SJO1:00 pmSan José Juan Santamaria Intl
21h 29m
1 stop
ONT9:29 amOntario
Sep 28
ONT1:04 pmOntario
22h 55m
2 stops
SJO12:59 pmSan José Juan Santamaria Intl
$460
American Airlines
Sep 1
SJO7:00 amSan José Juan Santamaria Intl
27h 34m
2 stops
ONT9:34 amOntario
Sep 15
ONT2:22 pmOntario
28h 45m
2 stops
SJO8:07 pmSan José Juan Santamaria Intl
$461
American Airlines
Sep 18
SJO2:57 pmSan José Juan Santamaria Intl
21h 50m
2 stops
ONT11:47 amOntario
Sep 29
ONT2:22 pmOntario
28h 45m
2 stops
SJO8:07 pmSan José Juan Santamaria Intl
$469

momondo Fare Finder

 
Customize your flight search to find flights from San José to Ontario 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 August 1, 2026.
Use the filters below to find and compare flights from San José to Ontario that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

San JoséOntario

SJO - ONT

SJOONT

San José Juan Santamaria Intl

Wed 9/23

1:25 pm-10:59 pm

2 stops34h 34m

Ontario

Mon 9/28

9:25 am-12:21 pm

2 stops25h 56m

$438

San JoséOntario

SJO - ONT

SJOONT

San José Juan Santamaria Intl

Thu 9/17

7:55 am-12:12 pm

2 stops29h 17m

Ontario

Wed 9/23

9:01 am-7:15 am

1 stop21h 14m

$438

San JoséOntario

SJO - ONT

SJOONT

San José Juan Santamaria Intl

Thu 9/17

7:55 am-12:12 pm

2 stops29h 17m

Ontario

Tue 9/22

6:08 am-12:21 pm

2 stops29h 13m

$438

San JoséOntario

SJO - ONT

SJOONT

San José Juan Santamaria Intl

Thu 9/17

7:55 am-12:12 pm

2 stops29h 17m

Ontario

Sun 9/27

9:25 am-7:15 am

1 stop20h 50m

$438

San JoséOntario

SJO - ONT

SJOONT

San José Juan Santamaria Intl

Fri 9/18

1:25 pm-6:11 pm

2 stops29h 46m

Ontario

Wed 9/23

6:08 am-7:15 am

1 stop24h 07m

$438
Quickest round-trip

San JoséOntario

SJO - ONT

SJOONT

San José Juan Santamaria Intl

Thu 9/17

8:45 am-10:51 pm

1 stop15h 06m

Ontario

Sun 9/27

9:25 am-7:15 am

1 stop20h 50m

$438

San JoséOntario

SJO - ONT

SJOONT

San José Juan Santamaria Intl

Fri 9/18

8:45 am-10:51 pm

1 stop15h 06m

Ontario

Sun 9/27

6:07 am-7:15 am

1 stop24h 08m

$438

San JoséOntario

SJO - ONT

SJOONT

San José Juan Santamaria Intl

Fri 9/18

8:45 am-8:01 pm

1 stop12h 16m

Ontario

Wed 9/23

1:56 pm-7:37 pm

2 stops28h 41m

$438

San JoséOntario

SJO - ONT

SJOONT

San José Juan Santamaria Intl

Thu 9/10

2:57 pm-9:29 am

2 stops19h 32m

Ontario

Sun 9/13

12:37 pm-11:59 am

2 stops22h 22m

$452

San JoséOntario

SJO - ONT

SJOONT

San José Juan Santamaria Intl

Tue 9/1

7:00 am-9:34 am

2 stops27h 34m

Ontario

Tue 9/15

2:22 pm-8:07 pm

2 stops28h 45m

$460

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 Los Angeles from

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

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

Prices are currently high for flights on this route.

Typical prices usually range from $361 to $396.
The lowest price recently found on this route was $438.

What is the cheapest month to fly to Ontario?

In general, January 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 $327. If you aren’t able to travel during the month of January, then book flights to Ontario from San José during February instead. Flights to Ontario in February, while not as cheap as those in January, still average around $378.

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 $451 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 47% 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 August 2026, prices for San José to Ontario flights are approximately 18% 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

Fastest flight time

9h 34m

Direct flights

None
The fastest flight from San José to Ontario takes 9h 34m
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 34m, 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?

  • 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?

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 AirlinesPriceFrom $267Free CancellationRating
7.4
10,062 reviews
Search United Airlines 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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