Flights from Ontario/LA (ONT) to San Antonio (SAT)

Book cheap flights from Ontario/LA to San Antonio with Southwest Airlines®. It’s easy to find the Ontario International Airport to San Antonio International Airport flight to make your booking and travel a breeze. Whether you’re traveling for business or pleasure, solo or with the whole family, you’ll enjoy flying Southwest®. Have flexible travel dates? Plug them into the Low Fare Calendar and see the lowest fares available within your travel window. You may also want to browse Southwest Vacations® to see special offers and package deals on flights, hotels, rental cars, and more.

Explore your options and book your Ontario/LA to San Antonio flight with Southwest today!

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Best Airline in the U.S. and North America & Best Economy and Low Cost Airline in North America.

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Check out Ontario/LA to San Antonio flights and book yours now!

Middle seats open through November 30

Full exchange of fresh, outdoor air every 2-3 minutes while inflight

Face coverings required

Flight details

Departing from: Ontario International Airport (ONT)

Arriving at: San Antonio International Airport (SAT)

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Route information*

9

Daily flights

23

Weekly flights

5

Flightsbefore noon

3

Flightsbetween
12-6pm

1

Flightafter 6pm

View our interactive map

*Based on DOT published scheduled average flights Monday-Friday between 8/20/2020 and 4/11/2021, as of 8/20/2020.

Travel tips

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Infancy policy

One child over 14 days and under two (2) years of age, not occupying a seat, may be carried free of charge when traveling with an adult (12 years of age or older). Learn more.

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Pet policy

Customers flying with a pet are subject to a pet fare. To learn more about traveling with your furry friend, explore the Southwest® pet policy.

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Unaccompanied minor

Minors under the age of 18 are not permitted to fly unaccompanied on international flights or any itinerary that includes an international flight. Learn more.

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Bags fly free®1

Start packing! Every ticketed Customer’s first two checked bags are free. Learn more.

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The Southwest travel experience

When you deplane at San Antonio International Airport you'll be just eight miles north of downtown San Antonio.

At Southwest, we know it takes more than great deals on San Antonio airfares and convenient scheduling options to make your trip memorable. So from booking to boarding, we offer services and features designed to make your travel from Ontario/LA to San Antonio the best it can be. Find out more about the Southwest® Experience before you book your Ontario International Airport to San Antonio International Airport flight.

Flying with Southwest is simple and fun, no matter which of our dozens of exciting destinations you choose. And when you search for your next flight to San Antonio, you know you won’t be surprised at checkout. Low fares, no hidden fees. That’s our Transfarency® promise. And, as always, bags fly free. Enroll in our Click 'N Save® emails and stay up to date on our latest flight deals. Looking for tours, activities, and more hidden gems to add to your San Antonio adventure? Explore Southwest Airlines® Experiences and earn Rapid Rewards® points when you fly.

1First and second checked bags. Weight and size limits apply.

2Fare difference may apply.