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Cheap flights from San Jose, California to Los Angeles from $55

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 Jose, California to Los Angeles departing on 11/17. 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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Find the cheapest flights from San Jose, California to Los Angeles

Cheap round-trip flights

Enter your travel dates to find the best prices.
Frontier Logo
6:19 pm - 9:57 pmSJC-ONT
3h 38m1 stop
Frontier Logo
3:31 pm - 5:34 pmONT-SJC
26h 03m1 stop
$110Frontier
Find Deal
Mon, Nov 17 - Thu, Nov 20
Frontier Logo
6:19 pm - 9:57 pmSJC-ONT
3h 38m1 stop
Frontier Logo
6:53 am - 11:32 amONT-SJC
28h 39m1 stop
$143Frontier
Find Deal
Mon, Nov 10 - Thu, Nov 13
Frontier Logo
4:24 pm - 9:17 pmSJC-ONT
4h 53m1 stop
Frontier Logo
6:30 am - 10:56 amONT-SJC
4h 26m1 stop
$157Frontier
Find Deal
Thu, Jan 22 - Sun, Jan 25
Southwest Logo
10:35 am - 11:55 amSJC-ONT
1h 20mnonstop
Southwest Logo
7:55 am - 9:10 amONT-SJC
1h 15mnonstop
$169Southwest
Find Deal
Wed, Dec 10 - Thu, Dec 11
Frontier Logo
6:19 pm - 9:57 pmSJC-ONT
3h 38m1 stop
Frontier Logo
6:00 am - 5:34 pmONT-SJC
11h 34m1 stop
$176Frontier
Find Deal
Mon, Nov 10 - Fri, Nov 14
Southwest Logo
6:35 am - 12:00 pmSJC-ONT
5h 25m1 stop
Southwest Logo
6:50 pm - 8:05 pmONT-SJC
1h 15mnonstop
$179Southwest
Find Deal
Thu, Dec 11 - Mon, Dec 15
Multiple Airlines Logo
4:24 pm - 9:17 pmSJC-ONT
4h 53m1 stop
Multiple Airlines Logo
7:00 am - 2:42 pmONT-SJC
7h 42m2 stops
$257Multiple Airlines
Find Deal
Thu, Jan 22 - Sun, Jan 25
Alaska Airlines Logo
7:40 am - 12:46 pmSJC-ONT
5h 06m1 stop
Alaska Airlines Logo
6:00 am - 7:24 pmONT-SJC
13h 24m2 stops
$268Alaska Airlines
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Wed, Dec 10 - Tue, Dec 16
Alaska Airlines Logo
7:40 am - 12:46 pmSJC-ONT
5h 06m1 stop
Alaska Airlines Logo
6:00 am - 7:24 pmONT-SJC
13h 24m2 stops
$278Alaska Airlines
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Thu, Dec 11 - Tue, Dec 16
Hawaiian Airlines Logo
7:40 am - 8:03 pmSJC-ONT
12h 23m1 stop
Hawaiian Airlines Logo
6:00 am - 1:50 pmONT-SJC
7h 50m1 stop
$311Hawaiian Airlines
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Fri, Dec 5 - Sun, Dec 7

Frontier flights from San Jose, California to Ontario

Our best Frontier deals on San Jose, California to Ontario flight tickets
Frontier
Nov 17
SJC6:19 pmSan Jose
3h 38m
1 stop
ONT9:57 pmOntario
Nov 20
ONT3:31 pmOntario
26h 03m
1 stop
SJC5:34 pmSan Jose
$110
Find similar
Frontier
Nov 10
SJC6:19 pmSan Jose
3h 38m
1 stop
ONT9:57 pmOntario
Nov 13
ONT6:53 amOntario
28h 39m
1 stop
SJC11:32 amSan Jose
$143
Find similar
Frontier
Jan 22
SJC4:24 pmSan Jose
4h 53m
1 stop
ONT9:17 pmOntario
Jan 25
ONT6:30 amOntario
4h 26m
1 stop
SJC10:56 amSan Jose
$157
Find similar

Southwest flights from San Jose, California to Ontario

Our best Southwest deals on San Jose, California to Ontario flight tickets
Southwest
Dec 10
SJC10:35 amSan Jose
1h 20m
ONT11:55 amOntario
Dec 11
ONT7:55 amOntario
1h 15m
SJC9:10 amSan Jose
$169
Find similar
Southwest
Dec 11
SJC6:35 amSan Jose
5h 25m
1 stop
ONT12:00 pmOntario
Dec 16
ONT6:50 pmOntario
1h 15m
SJC8:05 pmSan Jose
$179
Find similar
Southwest
Dec 11
SJC7:05 amSan Jose
1h 15m
ONT8:20 amOntario
Dec 16
ONT11:10 amOntario
1h 15m
SJC12:25 pmSan Jose
$181
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from San Jose, California 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 October 30, 2025.
Use the filters below to find and compare flights from San Jose, California to Ontario that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

San JoseOntario

SJC - ONT

SJCONT

San Jose

Mon 11/17

6:19 pm-9:57 pm

1 stop3h 38m

Ontario

Thu 11/20

3:31 pm-5:34 pm

1 stop26h 03m

$110

San JoseOntario

SJC - ONT

SJCONT

San Jose

Mon 11/10

6:19 pm-9:57 pm

1 stop3h 38m

Ontario

Thu 11/13

6:53 am-11:32 am

1 stop28h 39m

$143

San JoseOntario

SJC - ONT

SJCONT

San Jose

Thu 1/22

4:24 pm-9:17 pm

1 stop4h 53m

Ontario

Sun 1/25

6:30 am-10:56 am

1 stop4h 26m

$157

San JoseOntario

SJC - ONT

SJCONT

San Jose

Wed 12/10

10:35 am-11:55 am

Nonstop1h 20m

Ontario

Thu 12/11

7:55 am-9:10 am

Nonstop1h 15m

$169

San JoseOntario

SJC - ONT

SJCONT

San Jose

Mon 11/10

6:19 pm-9:57 pm

1 stop3h 38m

Ontario

Fri 11/14

6:00 am-5:34 pm

1 stop11h 34m

$176

San JoseOntario

SJC - ONT

SJCONT

San Jose

Thu 12/11

6:35 am-12:00 pm

1 stop5h 25m

Ontario

Mon 12/15

6:50 pm-8:05 pm

Nonstop1h 15m

$179

San JoseOntario

SJC - ONT

SJCONT

San Jose

Thu 1/22

4:24 pm-9:17 pm

1 stop4h 53m

Ontario

Sun 1/25

7:00 am-2:42 pm

2 stops7h 42m

$257

San JoseOntario

SJC - ONT

SJCONT

San Jose

Wed 12/10

7:40 am-12:46 pm

1 stop5h 06m

Ontario

Tue 12/16

6:00 am-7:24 pm

2 stops13h 24m

$268

San JoseOntario

SJC - ONT

SJCONT

San Jose

Thu 12/11

7:40 am-12:46 pm

1 stop5h 06m

Ontario

Tue 12/16

6:00 am-7:24 pm

2 stops13h 24m

$278

San JoseOntario

SJC - ONT

SJCONT

San Jose

Fri 12/5

7:40 am-8:03 pm

1 stop12h 23m

Ontario

Sun 12/7

6:00 am-1:50 pm

1 stop7h 50m

$311

Flights are sorted by cheapest round-trip flights first.

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How to get the cheapest flight ticket from San Jose, California 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, January is the cheapest month to fly from San Jose, California to Ontario. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $228. If you aren’t able to travel during the month of January, then book flights to Ontario from San Jose, California during August instead. Flights to Ontario in August, while not as cheap as those in January, still average around $244.

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 Monday when prices can be found for as low as $259. 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 Jose, California to Ontario for around $340.

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 Jose, California to Ontario when you can find flight prices for as low as $279. 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 in the morning when prices are $294 on average. Flights to Ontario from San Jose, California in the morning are generally more expensive because this time of day is more convenient for travelers’ schedules.

What is the cheapest San Jose to Ontario flight route?

Fly from San Jose to Ontario for the best San Jose - Ontario flight prices

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

You are more likely to see cheaper flights to Ontario from San Jose, California when booking weeks ahead of your departure date. In general, you can expect to find flights to Ontario for around $264 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Ontario from San Jose, California for as low as $163 on momondo.

What cabin class options are available on San Jose to Ontario flights?

There is only 1 cabin class available to choose from on San Jose to Ontario flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

How have San Jose, California to Ontario flight prices changed over time?

As of October 2025, prices for San Jose, California to Ontario flights are approximately 24% more expensive when compared to flights at the same time last year.

When to book flights from San Jose, California to Ontario

Are you open to changing your travel dates? Check out the ideal times to fly from San Jose, California to Ontario according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap San Jose, California to Ontario (SJC to ONT) flight deals and tips

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

Best Price Found

$139

Fastest flight time

1h 15m

Direct flights

Every day

Airports in Ontario

1 airport
The best one-way flight to Ontario from San Jose, California in the past 72 hours is $139. The best round-trip flight deal from San Jose, California to Ontario found on momondo in the last 72 hours is $225.
The fastest flight from San Jose, California to Ontario takes 1h 15m
Direct flights go from San Jose, California to Ontario every day.
There is 1 airport near Ontario: Ontario (ONT)
Search flight deals

  • How far is San Jose to Ontario by plane?

    The distance between San Jose and Ontario is about 327.8 mi. By plane, this route typically takes 1h 15m.

  • When did momondo last update prices for flights from San Jose Airport to Ontario Airport?

    Prices for flights from San Jose Airport to Ontario Airport were last updated today.

  • How many operators does momondo search for flights from San Jose Airport to Ontario Airport?

  • How old do you have to be to fly from San Jose 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 Jose Airport to Ontario Airport.

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

    The required travel and health documents for your Ontario Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Ontario Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

  • What is the most popular plane model from San Jose, California to Ontario?

  • What is the most popular airline from San Jose, California to Ontario?

Best airlines flying from San Jose, California to Ontario

Compare and see reviews for airlines that fly from San Jose, California to Ontario with momondo
Airline
Rating
Free Cancellation
Price
FrontierPriceFrom $62Free CancellationRating
5.8
3,123 reviews
Search Frontier flights
SouthwestPriceFrom $116Free CancellationRating
8.0
4,243 reviews
Search Southwest flights
Alaska AirlinesPriceFrom $196Free CancellationRating
8.0
11,219 reviews
Search Alaska Airlines flights

  • Southwest Flights From San Jose, California to Ontario

    Southwest flight deals from San Jose, California to Ontario start from $116 round-trip. Over the 4 Southwest flights for this route in a normal week, average airfare is usually $281 round-trip - but some users have found much cheaper deals with momondo.

Why use momondo?

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

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from San Jose to Ontario. momondo saves you time and could save you money on your trip.

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

Flights from San Jose to Ontario 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 San Jose 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 Jose to Ontario.

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

Of course. momondo tracks the price of San Jose to Ontario flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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