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Cheap flights from San José to Los Angeles from $149

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 12/18. 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 San José to Los Angeles

Cheap round-trip flights

Enter your travel dates to find the best prices.
Avianca Logo
3:05 pm - 8:55 pm
SJO
-
ONT
7h 50m1 stop
Avianca Logo
10:30 pm - 1:40 pm
ONT
-
SJO
13h 10m1 stop
$255Avianca
jue., feb. 19 - sáb., feb. 28
Avianca Logo
3:05 pm - 8:55 pm
SJO
-
ONT
7h 50m1 stop
Avianca Logo
11:25 pm - 11:15 am
ONT
-
SJO
10h 50m1 stop
$256Avianca
mar., mar. 3 - sáb., abr. 11
Avianca Logo
3:05 pm - 9:55 pm
SJO
-
ONT
7h 50m1 stop
Avianca Logo
11:30 pm - 1:40 pm
ONT
-
SJO
13h 10m1 stop
$257Avianca
mar., mar. 10 - sáb., mar. 14
Avianca Logo
3:05 pm - 8:55 pm
SJO
-
ONT
7h 50m1 stop
Avianca Logo
11:30 pm - 11:25 am
ONT
-
SJO
10h 55m1 stop
$261Avianca
jue., mar. 5 - jue., mar. 12
Avianca Logo
3:05 pm - 8:55 pm
SJO
-
ONT
7h 50m1 stop
Avianca Logo
11:25 pm - 6:45 pm
ONT
-
SJO
18h 20m1 stop
$265Avianca
mar., mar. 3 - sáb., abr. 11
Avianca Logo
9:35 am - 9:55 pm
SJO
-
ONT
13h 20m1 stop
Avianca Logo
11:25 pm - 11:15 am
ONT
-
SJO
10h 50m1 stop
$266Avianca
mar., abr. 21 - mar., may. 5
United Airlines Logo
8:45 am - 10:53 pm
SJO
-
ONT
16h 08m2 stops
United Airlines Logo
6:00 am - 1:15 pm
ONT
-
SJO
29h 15m2 stops
$267United Airlines
jue., ene. 22 - dom., feb. 1
Avianca Logo
5:05 am - 9:55 pm
SJO
-
ONT
17h 50m1 stop
Avianca Logo
11:25 pm - 11:15 am
ONT
-
SJO
10h 50m1 stop
$275Avianca
sáb., may. 9 - sáb., may. 16
United Airlines Logo
9:40 am - 10:57 pm
SJO
-
ONT
15h 17m1 stop
United Airlines Logo
11:59 pm - 11:56 am
ONT
-
SJO
10h 57m1 stop
$276United Airlines
jue., feb. 26 - lun., mar. 9
United Airlines Logo
7:55 am - 12:37 pm
SJO
-
ONT
29h 42m2 stops
United Airlines Logo
11:05 am - 7:15 am
ONT
-
SJO
19h 10m1 stop
$281United Airlines
vie., may. 1 - vie., may. 15

Avianca flights from San José to Ontario

Our best Avianca deals on San José to Ontario flight tickets
Avianca
Feb 19
SJO3:05 pmSan José Juan Santamaria Intl
7h 50m
1 stop
ONT8:55 pmOntario
Feb 28
ONT10:30 pmOntario
13h 10m
1 stop
SJO1:40 pmSan José Juan Santamaria Intl
$255
Find similar
Avianca
Mar 3
SJO3:05 pmSan José Juan Santamaria Intl
7h 50m
1 stop
ONT8:55 pmOntario
Apr 11
ONT11:25 pmOntario
10h 50m
1 stop
SJO11:15 amSan José Juan Santamaria Intl
$256
Find similar
Avianca
Mar 10
SJO3:05 pmSan José Juan Santamaria Intl
7h 50m
1 stop
ONT9:55 pmOntario
Mar 14
ONT11:30 pmOntario
13h 10m
1 stop
SJO1:40 pmSan José Juan Santamaria Intl
$257
Find similar

United Airlines flights from San José to Ontario

Our best United Airlines deals on San José to Ontario flight tickets
United Airlines
Jan 22
SJO6:30 amSan José Juan Santamaria Intl
17h 28m
1 stop
ONT9:58 pmOntario
Feb 4
ONT1:53 pmOntario
16h 39m
1 stop
SJO8:32 amSan José Juan Santamaria Intl
$267
Find similar
United Airlines
Feb 26
SJO9:40 amSan José Juan Santamaria Intl
15h 17m
1 stop
ONT10:57 pmOntario
Mar 8
ONT11:59 pmOntario
10h 57m
1 stop
SJO11:56 amSan José Juan Santamaria Intl
$276
Find similar
United Airlines
May 1
SJO7:55 amSan José Juan Santamaria Intl
29h 42m
2 stops
ONT12:37 pmOntario
May 15
ONT11:05 amOntario
19h 10m
1 stop
SJO7:15 amSan José Juan Santamaria Intl
$281
Find similar

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 diciembre 10, 2025.
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

San JoséOntario

SJO - ONT

SJOONT

San José Juan Santamaria Intl

jue. 2/19

3:05 pm-8:55 pm

1 stop7h 50m

Ontario

sáb. 2/28

10:30 pm-1:40 pm

1 stop13h 10m

$255

San JoséOntario

SJO - ONT

SJOONT

San José Juan Santamaria Intl

mar. 3/3

3:05 pm-8:55 pm

1 stop7h 50m

Ontario

sáb. 4/11

11:25 pm-11:15 am

1 stop10h 50m

$256

San JoséOntario

SJO - ONT

SJOONT

San José Juan Santamaria Intl

mar. 3/10

3:05 pm-9:55 pm

1 stop7h 50m

Ontario

sáb. 3/14

11:30 pm-1:40 pm

1 stop13h 10m

$257

San JoséOntario

SJO - ONT

SJOONT

San José Juan Santamaria Intl

jue. 3/5

3:05 pm-8:55 pm

1 stop7h 50m

Ontario

jue. 3/12

11:30 pm-11:25 am

1 stop10h 55m

$261

San JoséOntario

SJO - ONT

SJOONT

San José Juan Santamaria Intl

mar. 3/3

3:05 pm-8:55 pm

1 stop7h 50m

Ontario

sáb. 4/11

11:25 pm-6:45 pm

1 stop18h 20m

$265

San JoséOntario

SJO - ONT

SJOONT

San José Juan Santamaria Intl

mar. 4/21

9:35 am-9:55 pm

1 stop13h 20m

Ontario

mar. 5/5

11:25 pm-11:15 am

1 stop10h 50m

$266

San JoséOntario

SJO - ONT

SJOONT

San José Juan Santamaria Intl

jue. 1/22

8:45 am-10:53 pm

2 stops16h 08m

Ontario

dom. 2/1

6:00 am-1:15 pm

2 stops29h 15m

$267

San JoséOntario

SJO - ONT

SJOONT

San José Juan Santamaria Intl

sáb. 5/9

5:05 am-9:55 pm

1 stop17h 50m

Ontario

sáb. 5/16

11:25 pm-11:15 am

1 stop10h 50m

$275

San JoséOntario

SJO - ONT

SJOONT

San José Juan Santamaria Intl

jue. 2/26

9:40 am-10:57 pm

1 stop15h 17m

Ontario

lun. 3/9

11:59 pm-11:56 am

1 stop10h 57m

$276

San JoséOntario

SJO - ONT

SJOONT

San José Juan Santamaria Intl

vie. 5/1

7:55 am-12:37 pm

2 stops29h 42m

Ontario

vie. 5/15

11:05 am-7:15 am

1 stop19h 10m

$281

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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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 cheapest month to fly to Ontario?

In general, October 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 $368. If you aren’t able to travel during the month of October, then book flights to Ontario from San José during November instead. Flights to Ontario in November, while not as cheap as those in October, still average around $383.

What is the cheapest day to depart on your flight to Ontario?

The cheapest day to depart on your flight to Ontario is on a Tuesday when prices can be found for as low as $418. This is often the case because there is less demand to fly during this day of the week. When flying out on a Wednesday, the most expensive travel day of the week, you can expect to see flight prices from San José to Ontario for around $660.

What is the cheapest time of day to depart on your flight to Ontario?

In the afternoon is the cheapest time of day to fly from San José to Ontario when you can find flight prices for as low as $265. Flying to Ontario in the afternoon is an ideal time because this is during off-peak travel hours. If you have a flexible travel schedule, then try to avoid flying at noon when prices are $645 on average. Flights to Ontario from San José at noon are generally more expensive because this time of day is more convenient for travelers’ schedules.

How far in advance should I book a flight 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 $428 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 $317 on momondo.

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

You could potentially save up to 5% 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 December 2025, prices for San José to Ontario flights are approximately 32% 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

10h 15m

Direct flights

None
The fastest flight from San José to Ontario takes 10h 15m
There are no direct flights from San José to Ontario. There are no popular flight routes from San José to Ontario.
Search flight deals

  • 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 10h 15m, 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
9,092 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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