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Cheap flights from San Antonio to Los Angeles from $52

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 Antonio to Los Angeles departing on 2/24. 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 Antonio to Los Angeles

Cheap round-trip flights

Enter your travel dates to find the best prices.
Frontier Logo
9:59 pm - 1:34 pm
SAT
-
ONT
17h 35m1 stop
Frontier Logo
2:48 pm - 12:25 pm
ONT
-
SAT
19h 37m1 stop
$129Frontier
Fri, Jan 23 - Sun, Feb 1
Frontier Logo
9:59 pm - 6:40 pm
SAT
-
ONT
22h 41m1 stop
Frontier Logo
3:07 pm - 1:11 pm
ONT
-
SAT
20h 04m1 stop
$155Frontier
Fri, Jan 30 - Wed, Feb 4
Frontier Logo
4:13 pm - 10:39 pm
SAT
-
ONT
8h 26m1 stop
Frontier Logo
7:00 am - 3:14 pm
ONT
-
SAT
6h 14m1 stop
$156Frontier
Tue, Feb 17 - Wed, Feb 18
Frontier Logo
2:01 pm - 5:15 pm
SAT
-
ONT
5h 14m1 stop
Frontier Logo
7:00 am - 3:00 pm
ONT
-
SAT
6h 00m1 stop
$173Frontier
Mon, Jan 5 - Wed, Jan 7
Frontier Logo
2:01 pm - 9:17 pm
SAT
-
ONT
9h 16m1 stop
Frontier Logo
8:14 pm - 11:49 am
ONT
-
SAT
13h 35m1 stop
$174Frontier
Mon, Jan 5 - Thu, Jan 8
Frontier Logo
8:24 pm - 12:20 am
SAT
-
ONT
5h 56m1 stop
Frontier Logo
6:20 am - 7:33 pm
ONT
-
SAT
11h 13m1 stop
$176Frontier
Thu, Jan 22 - Mon, Jan 26
Frontier Logo
2:01 pm - 5:15 pm
SAT
-
ONT
5h 14m1 stop
Frontier Logo
7:00 am - 3:00 pm
ONT
-
SAT
6h 00m1 stop
$182Frontier
Mon, Jan 5 - Wed, Jan 7
Frontier Logo
3:55 pm - 11:14 pm
SAT
-
ONT
9h 19m1 stop
Frontier Logo
3:21 pm - 12:09 pm
ONT
-
SAT
18h 48m1 stop
$183Frontier
Wed, Jan 7 - Sat, Jan 10
Frontier Logo
10:13 am - 11:56 pm
SAT
-
ONT
15h 43m1 stop
Frontier Logo
10:18 pm - 11:00 am
ONT
-
SAT
10h 42m1 stop
$184Frontier
Fri, Jan 9 - Sun, Jan 11
Frontier Logo
3:57 pm - 11:59 pm
SAT
-
ONT
10h 02m1 stop
Frontier Logo
6:20 am - 7:33 pm
ONT
-
SAT
11h 13m1 stop
$190Frontier
Sun, Jan 18 - Thu, Jan 22

Frontier flights from San Antonio to Ontario

Our best Frontier deals on San Antonio to Ontario flight tickets
Frontier
Jan 23
SAT9:59 pmSan Antonio
17h 35m
1 stop
ONT1:34 pmOntario
Feb 1
ONT2:48 pmOntario
19h 37m
1 stop
SAT12:25 pmSan Antonio
$129
Find similar
Frontier
Jan 30
SAT9:59 pmSan Antonio
22h 41m
1 stop
ONT6:40 pmOntario
Feb 4
ONT3:07 pmOntario
20h 04m
1 stop
SAT1:11 pmSan Antonio
$155
Find similar
Frontier
Feb 17
SAT4:13 pmSan Antonio
8h 26m
1 stop
ONT10:39 pmOntario
Feb 18
ONT7:00 amOntario
6h 14m
1 stop
SAT3:14 pmSan Antonio
$156
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from San Antonio 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 December 10, 2025.
Use the filters below to find and compare flights from San Antonio to Ontario that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

San AntonioOntario

SAT - ONT

SATONT

San Antonio

Fri 1/23

9:59 pm-1:34 pm

1 stop17h 35m

Ontario

Sun 2/1

2:48 pm-12:25 pm

1 stop19h 37m

$129

San AntonioOntario

SAT - ONT

SATONT

San Antonio

Fri 1/30

9:59 pm-6:40 pm

1 stop22h 41m

Ontario

Wed 2/4

3:07 pm-1:11 pm

1 stop20h 04m

$155

San AntonioOntario

SAT - ONT

SATONT

San Antonio

Tue 2/17

4:13 pm-10:39 pm

1 stop8h 26m

Ontario

Wed 2/18

7:00 am-3:14 pm

1 stop6h 14m

$156

San AntonioOntario

SAT - ONT

SATONT

San Antonio

Mon 1/5

2:01 pm-5:15 pm

1 stop5h 14m

Ontario

Wed 1/7

7:00 am-3:00 pm

1 stop6h 00m

$173

San AntonioOntario

SAT - ONT

SATONT

San Antonio

Mon 1/5

2:01 pm-9:17 pm

1 stop9h 16m

Ontario

Thu 1/8

8:14 pm-11:49 am

1 stop13h 35m

$174

San AntonioOntario

SAT - ONT

SATONT

San Antonio

Thu 1/22

8:24 pm-12:20 am

1 stop5h 56m

Ontario

Mon 1/26

6:20 am-7:33 pm

1 stop11h 13m

$176

San AntonioOntario

SAT - ONT

SATONT

San Antonio

Mon 1/5

2:01 pm-5:15 pm

1 stop5h 14m

Ontario

Wed 1/7

7:00 am-3:00 pm

1 stop6h 00m

$182

San AntonioOntario

SAT - ONT

SATONT

San Antonio

Wed 1/7

3:55 pm-11:14 pm

1 stop9h 19m

Ontario

Sat 1/10

3:21 pm-12:09 pm

1 stop18h 48m

$183

San AntonioOntario

SAT - ONT

SATONT

San Antonio

Fri 1/9

10:13 am-11:56 pm

1 stop15h 43m

Ontario

Sun 1/11

10:18 pm-11:00 am

1 stop10h 42m

$184

San AntonioOntario

SAT - ONT

SATONT

San Antonio

Sun 1/18

3:57 pm-11:59 pm

1 stop10h 02m

Ontario

Thu 1/22

6:20 am-7:33 pm

1 stop11h 13m

$190

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 Antonio 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, February is the cheapest month to fly from San Antonio to Ontario. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $236. If you aren’t able to travel during the month of February, then book flights to Ontario from San Antonio during January instead. Flights to Ontario in January, while not as cheap as those in February, still average around $256.

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 Friday when prices can be found for as low as $277. This is often the case because there is less demand to fly during this day of the week. When flying out on a Thursday, the most expensive travel day of the week, you can expect to see flight prices from San Antonio to Ontario for around $359.

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

In the evening is the cheapest time of day to fly from San Antonio to Ontario when you can find flight prices for as low as $241. Flying to Ontario in the evening 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 $356 on average. Flights to Ontario from San Antonio in the afternoon 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 Antonio when booking weeks ahead of your departure date. In general, you can expect to find flights to Ontario for around $323 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Ontario from San Antonio for as low as $186 on momondo.

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

As of December 2025, prices for San Antonio to Ontario flights are approximately 35% more expensive when compared to flights at the same time last year.

When to book flights from San Antonio to Ontario

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

Cheap San Antonio to Ontario (SAT to ONT) flight deals and tips

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

Fastest flight time

5h 32m

Direct flights

None
The fastest flight from San Antonio to Ontario takes 5h 32m
There are no direct flights from San Antonio to Ontario. There are no popular flight routes from San Antonio to Ontario.
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  • How far is San Antonio to Ontario by plane?

    The distance between San Antonio and Ontario is about 1167.5 mi. Typically, this will take 5h 32m by plane in normal conditions.

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

    Prices for flights from San Antonio Airport to Ontario Airport are refreshed on a daily basis.

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

  • How old do you have to be to fly from San Antonio Airport to Ontario Airport?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from San Antonio Airport to Ontario Airport.

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

    The necessary travel and health documents for your Ontario Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

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

Best airlines flying from San Antonio to Ontario

Compare and see reviews for airlines that fly from San Antonio to Ontario with momondo
Airline
Rating
Free Cancellation
Price
Spirit AirlinesPriceFrom $111Free CancellationRating
6.3
8,174 reviews
Search Spirit Airlines flights
FrontierPriceFrom $115Free CancellationRating
5.8
3,085 reviews
Search Frontier flights
DeltaPriceFrom $158Free CancellationRating
7.9
8,007 reviews
Search Delta flights
American AirlinesPriceFrom $236Free CancellationRating
7.2
11,048 reviews
Search American Airlines flights
SouthwestPriceFrom $295Free CancellationRating
7.9
4,252 reviews
Search Southwest flights
United AirlinesPriceFrom $301Free 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 Antonio to Ontario?

Finding the right flight to Ontario from San Antonio is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Ontario quick and easy, saving you time and money.

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

Yes. All flights to Ontario from San Antonio on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from San Antonio to Ontario?

Once all potential San Antonio to Ontario flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

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

Price alerts on flights to Ontario from San Antonio 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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