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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 9/20. 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 Jose to Los Angeles

Cheap round-trip flights

Southwest Logo
3:20 pm - 4:35 pmSJC-ONT
1h 15mnonstop
Southwest Logo
11:10 am - 12:25 pmONT-SJC
1h 15mnonstop
$97Southwest
Find Deal
Sat, Dec 6 - Tue, Dec 9
Southwest Logo
2:10 pm - 8:40 pmSJC-ONT
6h 30m1 stop
Southwest Logo
1:55 pm - 3:10 pmONT-SJC
1h 15mnonstop
$107Southwest
Find Deal
Sat, Aug 30 - Tue, Sep 2
Southwest Logo
8:05 am - 9:20 amSJC-ONT
1h 15mnonstop
Southwest Logo
12:15 pm - 1:30 pmONT-SJC
1h 15mnonstop
$124Southwest
Find Deal
Wed, Oct 1 - Thu, Oct 2
Southwest Logo
8:05 am - 9:20 amSJC-ONT
1h 15mnonstop
Southwest Logo
5:55 pm - 10:55 pmONT-SJC
5h 00m1 stop
$134Southwest
Find Deal
Wed, Oct 1 - Thu, Oct 2
Frontier Logo
2:12 pm - 8:52 pmSJC-ONT
6h 40m1 stop
Frontier Logo
5:21 pm - 11:22 amONT-SJC
18h 01m1 stop
$169Frontier
Find Deal
Mon, Aug 11 - Sat, Aug 16
Frontier Logo
2:12 pm - 8:52 pmSJC-ONT
6h 40m1 stop
Frontier Logo
5:21 pm - 11:22 amONT-SJC
18h 01m1 stop
$175Frontier
Find Deal
Mon, Aug 11 - Wed, Aug 13
Frontier Logo
2:12 pm - 8:52 pmSJC-ONT
6h 40m1 stop
Frontier Logo
5:21 pm - 11:22 amONT-SJC
18h 01m1 stop
$177Frontier
Find Deal
Mon, Aug 11 - Sat, Aug 16
American Airlines Logo
6:00 am - 4:24 pmSJC-ONT
10h 24m1 stop
American Airlines Logo
4:54 pm - 10:25 pmONT-SJC
5h 31m1 stop
$241American Airlines
Find Deal
Sat, Aug 23 - Mon, Aug 25
American Airlines Logo
6:00 am - 5:52 pmSJC-ONT
11h 52m1 stop
American Airlines Logo
4:54 pm - 10:25 pmONT-SJC
5h 31m1 stop
$251American Airlines
Find Deal
Sat, Aug 23 - Mon, Aug 25
American Airlines Logo
6:00 am - 11:56 amSJC-ONT
5h 56m1 stop
American Airlines Logo
4:45 pm - 10:47 pmONT-SJC
6h 02m1 stop
$258American Airlines
Find Deal
Thu, Sep 4 - Sun, Sep 7

American Airlines flights from San Jose to Ontario

Our best American Airlines deals on San Jose to Ontario flight tickets
American Airlines
Aug 23
SJC6:00 amSan Jose
10h 24m
1 stop
ONT4:24 pmOntario
Aug 25
ONT4:54 pmOntario
5h 31m
1 stop
SJC10:25 pmSan Jose
$241
Find similar
American Airlines
Aug 23
SJC6:00 amSan Jose
11h 52m
1 stop
ONT5:52 pmOntario
Aug 25
ONT4:54 pmOntario
5h 31m
1 stop
SJC10:25 pmSan Jose
$251
Find similar
American Airlines
Sep 4
SJC6:00 amSan Jose
5h 56m
1 stop
ONT11:56 amOntario
Sep 7
ONT4:45 pmOntario
6h 02m
1 stop
SJC10:47 pmSan Jose
$258
Find similar

Frontier flights from San Jose to Ontario

Our best Frontier deals on San Jose to Ontario flight tickets
Frontier
Aug 11
SJC2:12 pmSan Jose
6h 40m
1 stop
ONT8:52 pmOntario
Aug 16
ONT5:21 pmOntario
18h 01m
1 stop
SJC11:22 amSan Jose
$169
Find similar
Frontier
Aug 11
SJC2:12 pmSan Jose
6h 40m
1 stop
ONT8:52 pmOntario
Aug 13
ONT5:21 pmOntario
18h 01m
1 stop
SJC11:22 amSan Jose
$175
Find similar
Frontier
Aug 11
SJC2:12 pmSan Jose
6h 40m
1 stop
ONT8:52 pmOntario
Aug 16
ONT5:21 pmOntario
18h 01m
1 stop
SJC11:22 amSan Jose
$177
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 July 30, 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

Sat 12/6

3:20 pm-4:35 pm

Nonstop1h 15m

Ontario

Tue 12/9

11:10 am-12:25 pm

Nonstop1h 15m

$97

San JoseOntario

SJC - ONT

SJCONT

San Jose

Sat 8/30

2:10 pm-8:40 pm

1 stop6h 30m

Ontario

Tue 9/2

1:55 pm-3:10 pm

Nonstop1h 15m

$107

San JoseOntario

SJC - ONT

SJCONT

San Jose

Wed 10/1

8:05 am-9:20 am

Nonstop1h 15m

Ontario

Thu 10/2

12:15 pm-1:30 pm

Nonstop1h 15m

$124

San JoseOntario

SJC - ONT

SJCONT

San Jose

Wed 10/1

8:05 am-9:20 am

Nonstop1h 15m

Ontario

Thu 10/2

5:55 pm-10:55 pm

1 stop5h 00m

$134

San JoseOntario

SJC - ONT

SJCONT

San Jose

Mon 8/11

2:12 pm-8:52 pm

1 stop6h 40m

Ontario

Sat 8/16

5:21 pm-11:22 am

1 stop18h 01m

$169

San JoseOntario

SJC - ONT

SJCONT

San Jose

Mon 8/11

2:12 pm-8:52 pm

1 stop6h 40m

Ontario

Wed 8/13

5:21 pm-11:22 am

1 stop18h 01m

$175

San JoseOntario

SJC - ONT

SJCONT

San Jose

Mon 8/11

2:12 pm-8:52 pm

1 stop6h 40m

Ontario

Sat 8/16

5:21 pm-11:22 am

1 stop18h 01m

$177

San JoseOntario

SJC - ONT

SJCONT

San Jose

Sat 8/23

6:00 am-4:24 pm

1 stop10h 24m

Ontario

Mon 8/25

4:54 pm-10:25 pm

1 stop5h 31m

$241

San JoseOntario

SJC - ONT

SJCONT

San Jose

Sat 8/23

6:00 am-5:52 pm

1 stop11h 52m

Ontario

Mon 8/25

4:54 pm-10:25 pm

1 stop5h 31m

$251

San JoseOntario

SJC - ONT

SJCONT

San Jose

Thu 9/4

6:00 am-11:56 am

1 stop5h 56m

Ontario

Sun 9/7

4:45 pm-10:47 pm

1 stop6h 02m

$258

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, August 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 $127. If you aren’t able to travel during the month of August, then book flights to Ontario from San Jose during January instead. Flights to Ontario in January, while not as cheap as those in August, still average around $228.

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 $228. 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 $309.

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 $252. 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 $334 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 $246 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 $140 on momondo.

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

There are 1 cabin classes 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 July 2025, prices for San Jose to Ontario flights are approximately 34% 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

$49

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 $49. The best round-trip flight deal from San Jose to Ontario found on momondo in the last 72 hours is $97.
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
Spirit AirlinesPriceFrom $24Free CancellationRating
6.3
8,048 reviews
Search Spirit Airlines flights
FrontierPriceFrom $38Free CancellationRating
5.9
3,237 reviews
Search Frontier flights
SouthwestPriceFrom $145Free CancellationRating
8.0
4,241 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 $145 round-trip. Over the 20 Southwest flights for this route in a normal week, average airfare is usually $272 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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