$94 Cheap Flights from San Antonio (SAT) to Ontario (ONT)

View $94 flight on Tue, Apr 29, 2025Opens in a new window

Popular airlines from San Antonio International Airport (SAT) to Los Angeles - Ontario Intl. Airport (ONT)

Find available prices by choosing your travel dates.

Cheap Flights from San Antonio to Ontario (SAT-ONT)

Prices were available within the past 7 days and start at $94 for one-way flights and $208 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frontier Airlines
Thu, May 8 - Sun, May 25
SAT
San Antonio
ONT
Ontario
$208 Roundtrip, found 3 hours ago
$208
Roundtrip
found 3 hours ago
Select Frontier Airlines flight, departing Thu, May 8 from San Antonio to Ontario, returning Sun, May 25, priced at $208 found 3 hours ago
Frontier Airlines
Tue, Apr 29 - Mon, May 5
SAT
San Antonio
ONT
Ontario
$218 Roundtrip, just found
$218
Roundtrip
just found
Select Frontier Airlines flight, departing Tue, Apr 29 from San Antonio to Ontario, returning Mon, May 5, priced at $218 just found
American Airlines
Wed, May 28 - Sat, May 31
SAT
San Antonio
ONT
Ontario
$222 Roundtrip, found 5 hours ago
$222
Roundtrip
found 5 hours ago
Select American Airlines flight, departing Wed, May 28 from San Antonio to Ontario, returning Sat, May 31, priced at $222 found 5 hours ago
Delta
Wed, May 28 - Sat, May 31
SAT
San Antonio
ONT
Ontario
$223 Roundtrip, found 5 hours ago
$223
Roundtrip
found 5 hours ago
Select Delta flight, departing Wed, May 28 from San Antonio to Ontario, returning Sat, May 31, priced at $223 found 5 hours ago
Southwest Airlines
Thu, May 29 - Sat, May 31
SAT
San Antonio
ONT
Ontario
$227 Roundtrip, found 8 hours ago
$227
Roundtrip
found 8 hours ago
Select Southwest Airlines flight, departing Thu, May 29 from San Antonio to Ontario, returning Sat, May 31, priced at $227 found 8 hours ago
Frontier Airlines
Sat, May 24 - Thu, May 29
SAT
San Antonio
ONT
Ontario
$227 Roundtrip, found 3 hours ago
$227
Roundtrip
found 3 hours ago
Select Frontier Airlines flight, departing Sat, May 24 from San Antonio to Ontario, returning Thu, May 29, priced at $227 found 3 hours ago
Frontier Airlines
Fri, May 9 - Mon, May 12
SAT
San Antonio
ONT
Ontario
$228 Roundtrip, found 1 hour ago
$228
Roundtrip
found 1 hour ago
Select Frontier Airlines flight, departing Fri, May 9 from San Antonio to Ontario, returning Mon, May 12, priced at $228 found 1 hour ago
Delta
Wed, May 21 - Sun, May 25
SAT
San Antonio
ONT
Ontario
$233 Roundtrip, found 14 hours ago
$233
Roundtrip
found 14 hours ago
Select Delta flight, departing Wed, May 21 from San Antonio to Ontario, returning Sun, May 25, priced at $233 found 14 hours ago
Southwest Airlines
Wed, May 28 - Sat, May 31
SAT
San Antonio
ONT
Ontario
$237 Roundtrip, found 5 hours ago
$237
Roundtrip
found 5 hours ago
Select Southwest Airlines flight, departing Wed, May 28 from San Antonio to Ontario, returning Sat, May 31, priced at $237 found 5 hours ago
United
Thu, Sep 18 - Mon, Sep 22
SAT
San Antonio
ONT
Ontario
$255 Roundtrip, found 2 hours ago
$255
Roundtrip
found 2 hours ago
Select United flight, departing Thu, Sep 18 from San Antonio to Ontario, returning Mon, Sep 22, priced at $255 found 2 hours ago
Flights from San Antonio (SAT) to Ontario (ONT)
Origin airport
San Antonio Intl.
Destination airport
Los Angeles - Ontario Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, Frontier Airlines, Southwest Airlines, United
Roundtrip price
$208
Distance
1163 mi

San Antonio to Ontario Flights

The cheapest times to fly from San Antonio to Ontario

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from San Antonio to Ontario are during the month of May. You can find some of the cheapest flights from San Antonio to Ontario with Expedia's search tool and vast selection of airlines.

The best time to book a flight from San Antonio to Ontario

Sunday is one of the best days to book for cheap flights from San Antonio to Ontario: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

How to find cheap round-trip tickets from San Antonio to Ontario

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from San Antonio to Ontario in 2025. You can also book with separate airlines for your outbound and return journeys, from $94 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap San Antonio to Ontario flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

You could also save big by booking one of Expedia's vacation packages. Bundling together your San Antonio to Ontario airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

*Terms apply.

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

Frequently asked questions

How much does a flight from San Antonio Intl. Airport (SAT) to Los Angeles - Ontario Intl. Airport (ONT) cost?
Discover the latest flight deals from SAT to ONT by entering your preferred travel dates and searching on Expedia. Easily compare prices by departure date if you have flexibility with your schedule and use handy filters to explore prices for your preferred journey. As a member of One Key™, our free loyalty program, you can use Price Tracking to watch fares and receive notifications if prices go up or down.
What is the cheapest month to fly from SAT to ONT?
The cheapest flights from SAT to ONT are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
What is the cheapest airline that flies from SAT to ONT?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that’ll take you from SAT to ONT. Sort your results by “Price (lowest to highest)” to snap up a great deal.
How many flights per day from San Antonio Intl. Airport (SAT) to Los Angeles - Ontario Intl. Airport (ONT)?
You’ll need to book a flight with a layover when traveling from San Antonio Intl. Airport (SAT) to Los Angeles - Ontario Intl. Airport (ONT). Direct flights don’t operate daily on this route. However, simply filter your search to include one or more stops to find an option that works for you.
What day of the week has the most flights from SAT to ONT?
Generally you’ll have the most choice when it comes to flights on a Friday. Tuesdays tend to be the quietest.* However, this can vary depending on the season, carrier and other factors.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What airline has the least delays from SAT to ONT?
Frontier Airlines has the strongest track record for on-time direct flights from San Antonio Intl. Airport (SAT) to Los Angeles - Ontario Intl. Airport (ONT), with an on-time rating of 100%. Use the Expedia App to look up your flight status before you leave and get real-time updates about any changes.
What is the best time to fly from San Antonio Intl. Airport (SAT) to Los Angeles - Ontario Intl. Airport (ONT)?
To avoid potential delays on the San Antonio Intl. Airport (SAT) to Los Angeles - Ontario Intl. Airport (ONT) route, aim to travel before 3 PM. Departures after this time have a 22% higher chance of cancellation.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG’s global flight data platform.
What airports do you fly into for Ontario from San Antonio Intl. Airport (SAT)?
If you’re taking a direct flight from San Antonio Intl. Airport (SAT) to Ontario, Los Angeles Intl. Airport (LAX) is the only airport you can touch down at.
Is it cheaper to buy a plane ticket from San Antonio Intl. Airport (SAT) to Los Angeles - Ontario Intl. Airport (ONT) last-minute?
Booking your ticket from SAT to ONT shortly before your trip is typically more expensive. But if there’s some wiggle room with your travel times and dates, you could grab a cheap last-minute fare.
Is it cheaper to book a SAT to ONT flight and hotel package?
You’ll generally save money by securing a SAT to ONT flight and hotel package compared to booking separately. In fact, travelers could save hundreds of dollars by bundling with Expedia. And it’s easy to manage everything in one place. Once you’ve chosen your preferred flights and accommodations, consider other add-ons like tours, activities and car rentals.
Can I cancel or change the date of my flight from San Antonio Intl. Airport (SAT) to Los Angeles - Ontario Intl. Airport (ONT)?
If you reserved your SAT to ONT flight in the last 24 hours, you may be able to modify or cancel it at no cost. Depending on the airline and the fare type you purchased, additional charges may apply for changes beyond that time. Airline policies and contact information can be found in your itinerary or confirmation email. Or, visit our Customer Service portal if you’d like more information.

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*Available to One Key members.