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Cheap flights from San Antonio to Los Angeles from $71

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 9/27. 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

Frontier Logo
3:22 pm - 7:54 pmSAT-ONT
6h 32m1 stop
Frontier Logo
6:05 am - 1:19 pmONT-SAT
5h 14m1 stop
$142Frontier
Find Deal
Sat, Sep 27 - Thu, Oct 9
Frontier Logo
3:22 pm - 7:54 pmSAT-ONT
6h 32m1 stop
Frontier Logo
8:59 pm - 9:10 amONT-SAT
10h 11m1 stop
$143Frontier
Find Deal
Sat, Sep 20 - Sat, Sep 27
Frontier Logo
2:04 pm - 10:05 pmSAT-ONT
10h 01m1 stop
Frontier Logo
6:00 am - 1:19 pmONT-SAT
5h 19m1 stop
$144Frontier
Find Deal
Sun, Nov 9 - Mon, Nov 10
Frontier Logo
7:25 pm - 7:54 pmSAT-ONT
26h 29m1 stop
Frontier Logo
7:30 pm - 1:16 pmONT-SAT
15h 46m1 stop
$145Frontier
Find Deal
Fri, Sep 26 - Sun, Sep 28
Frontier Logo
3:59 pm - 11:50 pmSAT-ONT
9h 51m1 stop
Frontier Logo
8:00 am - 1:19 pmONT-SAT
27h 19m1 stop
$146Frontier
Find Deal
Wed, Oct 8 - Wed, Oct 15
Frontier Logo
3:59 pm - 11:50 pmSAT-ONT
9h 51m1 stop
Frontier Logo
7:04 am - 3:14 pmONT-SAT
6h 10m1 stop
$149Frontier
Find Deal
Tue, Oct 14 - Tue, Oct 21
Frontier Logo
2:01 pm - 8:56 pmSAT-ONT
8h 55m1 stop
Frontier Logo
6:53 am - 3:14 pmONT-SAT
6h 21m1 stop
$150Frontier
Find Deal
Mon, Oct 6 - Wed, Oct 15
Frontier Logo
8:26 pm - 11:50 pmSAT-ONT
5h 24m1 stop
Frontier Logo
7:04 am - 4:37 pmONT-SAT
7h 33m1 stop
$154Frontier
Find Deal
Thu, Oct 9 - Sat, Oct 18
Logo
8:26 pm - 11:50 pmSAT-ONT
5h 24m1 stop
Logo
10:47 pm - 4:47 amONT-SAT
28h 00m1 stop
$230
Find Deal
Thu, Oct 9 - Sun, Oct 12
Logo
3:02 pm - 9:55 pmSAT-ONT
8h 53m2 stops
Logo
8:00 am - 1:19 pmONT-SAT
27h 19m1 stop
$231
Find Deal
Thu, Nov 6 - Wed, Nov 12

Frontier flights from San Antonio to Ontario

Our best Frontier deals on San Antonio to Ontario flight tickets
Frontier
Sep 27
SAT3:22 pmSan Antonio
6h 32m
1 stop
ONT7:54 pmOntario
Oct 9
ONT6:05 amOntario
5h 14m
1 stop
SAT1:19 pmSan Antonio
$142
Find similar
Frontier
Sep 20
SAT3:22 pmSan Antonio
6h 32m
1 stop
ONT7:54 pmOntario
Sep 27
ONT8:59 pmOntario
10h 11m
1 stop
SAT9:10 amSan Antonio
$143
Find similar
Frontier
Nov 9
SAT2:04 pmSan Antonio
10h 01m
1 stop
ONT10:05 pmOntario
Nov 10
ONT6:00 amOntario
5h 19m
1 stop
SAT1:19 pmSan Antonio
$144
Find similar

United Airlines flights from San Antonio to Ontario

Our best United Airlines deals on San Antonio to Ontario flight tickets
United Airlines
Sep 16
SAT5:30 amSan Antonio
14h 07m
3 stops
ONT5:37 pmOntario
Sep 21
ONT6:04 amOntario
5h 18m
1 stop
SAT1:22 pmSan Antonio
$512
Find similar
United Airlines
Sep 17
SAT11:45 amSan Antonio
10h 48m
2 stops
ONT8:33 pmOntario
Sep 21
ONT6:50 pmOntario
13h 47m
2 stops
SAT10:37 amSan Antonio
$515
Find similar
United Airlines
Sep 17
SAT7:45 amSan Antonio
6h 28m
1 stop
ONT12:13 pmOntario
Sep 19
ONT5:10 amOntario
5h 38m
1 stop
SAT12:48 pmSan Antonio
$547
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 September 3, 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

Sat 9/27

3:22 pm-7:54 pm

1 stop6h 32m

Ontario

Thu 10/9

6:05 am-1:19 pm

1 stop5h 14m

$142

San AntonioOntario

SAT - ONT

SATONT

San Antonio

Sat 9/20

3:22 pm-7:54 pm

1 stop6h 32m

Ontario

Sat 9/27

8:59 pm-9:10 am

1 stop10h 11m

$143

San AntonioOntario

SAT - ONT

SATONT

San Antonio

Sun 11/9

2:04 pm-10:05 pm

1 stop10h 01m

Ontario

Mon 11/10

6:00 am-1:19 pm

1 stop5h 19m

$144

San AntonioOntario

SAT - ONT

SATONT

San Antonio

Fri 9/26

7:25 pm-7:54 pm

1 stop26h 29m

Ontario

Sun 9/28

7:30 pm-1:16 pm

1 stop15h 46m

$145

San AntonioOntario

SAT - ONT

SATONT

San Antonio

Wed 10/8

3:59 pm-11:50 pm

1 stop9h 51m

Ontario

Wed 10/15

8:00 am-1:19 pm

1 stop27h 19m

$146

San AntonioOntario

SAT - ONT

SATONT

San Antonio

Tue 10/14

3:59 pm-11:50 pm

1 stop9h 51m

Ontario

Tue 10/21

7:04 am-3:14 pm

1 stop6h 10m

$149

San AntonioOntario

SAT - ONT

SATONT

San Antonio

Mon 10/6

2:01 pm-8:56 pm

1 stop8h 55m

Ontario

Wed 10/15

6:53 am-3:14 pm

1 stop6h 21m

$150

San AntonioOntario

SAT - ONT

SATONT

San Antonio

Thu 10/9

8:26 pm-11:50 pm

1 stop5h 24m

Ontario

Sat 10/18

7:04 am-4:37 pm

1 stop7h 33m

$154

San AntonioOntario

SAT - ONT

SATONT

San Antonio

Thu 10/9

8:26 pm-11:50 pm

1 stop5h 24m

Ontario

Sun 10/12

10:47 pm-4:47 am

1 stop28h 00m

$230

San AntonioOntario

SAT - ONT

SATONT

San Antonio

Thu 11/6

3:02 pm-9:55 pm

2 stops8h 53m

Ontario

Wed 11/12

8:00 am-1:19 pm

1 stop27h 19m

$231

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 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 September instead. Flights to Ontario in September, while not as cheap as those in February, still average around $277.

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 $346 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 September 2025, prices for San Antonio to Ontario flights are approximately 11% 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

Direct flights

None
There are no direct flights from San Antonio to Ontario. There are no popular flight routes from San Antonio to Ontario.
Search flight deals

  • 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 24m 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 $106Free CancellationRating
6.3
8,012 reviews
Search Spirit Airlines flights
FrontierPriceFrom $115Free CancellationRating
5.8
3,196 reviews
Search Frontier flights
DeltaPriceFrom $158Free CancellationRating
7.9
7,972 reviews
Search Delta flights
American AirlinesPriceFrom $236Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
SouthwestPriceFrom $301Free CancellationRating
8.0
4,238 reviews
Search Southwest flights

  • Southwest Flights From San Antonio to Ontario

    Across 3 Southwest flights from San Antonio to Ontario this week, the average price was $386, with the best Southwest deals starting from $301 round-trip. 4,238 users have rated Southwest on momondo, with an average score of 8.0/10.

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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