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Cheap flights from San Jose to Los Angeles from $49

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 to Los Angeles departing on 11/13. 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 to Los Angeles

Cheap round-trip flights

Southwest Logo
7:00 am - 8:15 amSJC-ONT
1h 15mnonstop
Southwest Logo
6:20 am - 7:35 amONT-SJC
1h 15mnonstop
$97Southwest
Find Deal
Thu, Oct 16 - Thu, Oct 23
Southwest Logo
11:30 am - 12:45 pmSJC-ONT
1h 15mnonstop
Southwest Logo
3:35 pm - 7:10 pmONT-SJC
3h 35m1 stop
$107Southwest
Find Deal
Sat, Oct 25 - Sat, Oct 25
Southwest Logo
5:00 pm - 11:00 pmSJC-ONT
6h 00m2 stops
Southwest Logo
2:30 pm - 3:45 pmONT-SJC
1h 15mnonstop
$112Southwest
Find Deal
Mon, Oct 27 - Wed, Oct 29
Southwest Logo
10:45 am - 12:05 pmSJC-ONT
1h 20mnonstop
Southwest Logo
9:35 pm - 7:30 amONT-SJC
9h 55m1 stop
$113Southwest
Find Deal
Thu, Oct 16 - Thu, Oct 23
Southwest Logo
12:15 pm - 9:55 pmSJC-ONT
9h 40m2 stops
Southwest Logo
6:20 am - 7:35 amONT-SJC
1h 15mnonstop
$118Southwest
Find Deal
Thu, Oct 16 - Thu, Oct 23
Frontier Logo
12:27 pm - 11:50 pmSJC-ONT
11h 23m1 stop
Frontier Logo
5:53 am - 10:32 amONT-SJC
28h 39m1 stop
$157Frontier
Find Deal
Fri, Oct 31 - Sun, Nov 2
Logo
11:40 am - 9:56 pmSJC-ONT
10h 16m1 stop
Logo
7:30 pm - 5:45 pmONT-SJC
22h 15m1 stop
$177
Find Deal
Sat, Sep 27 - Sun, Sep 28
Logo
7:12 pm - 7:53 amSJC-ONT
12h 41m2 stops
Logo
10:28 pm - 10:45 amONT-SJC
12h 17m1 stop
$202
Find Deal
Thu, Sep 25 - Mon, Sep 29
Frontier Logo
12:27 pm - 11:50 pmSJC-ONT
11h 23m1 stop
Frontier Logo
6:53 am - 5:34 pmONT-SJC
10h 41m2 stops
$227Frontier
Find Deal
Fri, Nov 14 - Mon, Nov 17
American Airlines Logo
6:00 am - 12:01 pmSJC-ONT
6h 01m1 stop
American Airlines Logo
6:15 am - 6:27 pmONT-SJC
12h 12m1 stop
$241American Airlines
Find Deal
Fri, Oct 31 - Sat, Nov 1

Southwest flights from San Jose to Ontario

Our best Southwest deals on San Jose to Ontario flight tickets
Southwest
Oct 16
SJC7:00 amSan Jose
1h 15m
ONT8:15 amOntario
Oct 23
ONT6:20 amOntario
1h 15m
SJC7:35 amSan Jose
$97
Find similar
Southwest
Oct 25
SJC11:30 amSan Jose
1h 15m
ONT12:45 pmOntario
Oct 25
ONT3:35 pmOntario
3h 35m
1 stop
SJC7:10 pmSan Jose
$107
Find similar
Southwest
Oct 27
SJC5:00 pmSan Jose
6h 00m
2 stops
ONT11:00 pmOntario
Oct 29
ONT2:30 pmOntario
1h 15m
SJC3:45 pmSan Jose
$112
Find similar

Frontier flights from San Jose to Ontario

Our best Frontier deals on San Jose to Ontario flight tickets
Frontier
Sep 19
SJC12:25 pmSan Jose
7h 29m
1 stop
ONT7:54 pmOntario
Sep 21
ONT3:43 pmOntario
19h 47m
1 stop
SJC11:30 amSan Jose
$144
Find similar
Frontier
Oct 31
SJC12:27 pmSan Jose
11h 23m
1 stop
ONT11:50 pmOntario
Nov 2
ONT5:53 amOntario
28h 39m
1 stop
SJC10:32 amSan Jose
$157
Find similar
Frontier
Sep 22
SJC12:30 pmSan Jose
7h 24m
1 stop
ONT7:54 pmOntario
Sep 26
ONT6:00 amOntario
11h 45m
1 stop
SJC5:45 pmSan Jose
$172
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from San Jose 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 September 14, 2025.
Use the filters below to find and compare flights from San Jose to Ontario that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

San JoseOntario

SJC - ONT

SJCONT

San Jose

Thu 10/16

7:00 am-8:15 am

Nonstop1h 15m

Ontario

Thu 10/23

6:20 am-7:35 am

Nonstop1h 15m

$97

San JoseOntario

SJC - ONT

SJCONT

San Jose

Sat 10/25

11:30 am-12:45 pm

Nonstop1h 15m

Ontario

Sat 10/25

3:35 pm-7:10 pm

1 stop3h 35m

$107

San JoseOntario

SJC - ONT

SJCONT

San Jose

Mon 10/27

5:00 pm-11:00 pm

2 stops6h 00m

Ontario

Wed 10/29

2:30 pm-3:45 pm

Nonstop1h 15m

$112

San JoseOntario

SJC - ONT

SJCONT

San Jose

Thu 10/16

10:45 am-12:05 pm

Nonstop1h 20m

Ontario

Thu 10/23

9:35 pm-7:30 am

1 stop9h 55m

$113

San JoseOntario

SJC - ONT

SJCONT

San Jose

Thu 10/16

12:15 pm-9:55 pm

2 stops9h 40m

Ontario

Thu 10/23

6:20 am-7:35 am

Nonstop1h 15m

$118

San JoseOntario

SJC - ONT

SJCONT

San Jose

Fri 10/31

12:27 pm-11:50 pm

1 stop11h 23m

Ontario

Sun 11/2

5:53 am-10:32 am

1 stop28h 39m

$157

San JoseOntario

SJC - ONT

SJCONT

San Jose

Sat 9/27

11:40 am-9:56 pm

1 stop10h 16m

Ontario

Sun 9/28

7:30 pm-5:45 pm

1 stop22h 15m

$177

San JoseOntario

SJC - ONT

SJCONT

San Jose

Thu 9/25

7:12 pm-7:53 am

2 stops12h 41m

Ontario

Mon 9/29

10:28 pm-10:45 am

1 stop12h 17m

$202

San JoseOntario

SJC - ONT

SJCONT

San Jose

Fri 11/14

12:27 pm-11:50 pm

1 stop11h 23m

Ontario

Mon 11/17

6:53 am-5:34 pm

2 stops10h 41m

$227

San JoseOntario

SJC - ONT

SJCONT

San Jose

Fri 10/31

6:00 am-12:01 pm

1 stop6h 01m

Ontario

Sat 11/1

6:15 am-6:27 pm

1 stop12h 12m

$241

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 Jose 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 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 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 Tuesday 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 to Ontario for around $340.

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

At noon is the cheapest time of day to fly from San Jose to Ontario when you can find flight prices for as low as $263. Flying to Ontario at noon 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 afternoon when prices are $310 on average. Flights to Ontario from San Jose in the afternoon 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 when booking weeks ahead of your departure date. In general, you can expect to find flights to Ontario for around $259 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 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.

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

No. A direct flight is the cheapest option for a flight between San Jose to Ontario.

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

As of September 2025, prices for San Jose to Ontario flights are approximately 23% more expensive when compared to flights at the same time last year.

When to book flights from San Jose to Ontario

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

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

Find info about flight duration, direct flights, and airports for your flight from San Jose 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 in the past 72 hours is $139. The best round-trip flight deal from San Jose to Ontario found on momondo in the last 72 hours is $189.
The fastest flight from San Jose to Ontario takes 1h 15m
Direct flights go from San Jose 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 to Ontario?

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

Best airlines flying from San Jose to Ontario

Compare and see reviews for airlines that fly from San Jose to Ontario with momondo
Airline
Rating
Free Cancellation
Price
FrontierPriceFrom $44Free CancellationRating
5.8
3,173 reviews
Search Frontier flights
SouthwestPriceFrom $139Free CancellationRating
8.0
4,245 reviews
Search Southwest flights
Alaska AirlinesPriceFrom $196Free CancellationRating
8.0
10,000 reviews
Search Alaska Airlines flights

  • Southwest Flights From San Jose to Ontario

    Southwest flight deals from San Jose to Ontario start from $139 round-trip. Over the 15 Southwest flights for this route in a normal week, average airfare is usually $277 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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