$94 Cheap Frontier Airlines flights San Antonio (SAT) to San Diego (SAN)

Set the “Price (lowest to highest)” filter on Expedia to look for cheap Frontier Airlines round-trip flights from $129 from SAT to SAN. Affordable one-way options from $94 are available too.**These prices were available on Expedia within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.

Look for one-way or round-trip flights to San Diego in January or November. You could find cheaper fares with Frontier Airlines during these quieter months.

For cheap Frontier Airlines fares from San Antonio Intl. Airport (SAT) to San Diego Intl. Airport (SAN), start searching one to three months before your intended departure. Securing domestic flights 34 to 86 days in advance could save you 25% compared to booking just 6 to 12 days ahead. The day you book can also impact how much you pay. Sunday is usually the cheapest, while Monday is often the most expensive for domestic flights. You can save 6% on average by booking your flight on a Sunday.**Ideal booking window recommendation is based on average round-trip ticket prices for January through November for 2024. Best day of the week to book recommendation is based on average round-trip ticket prices for January through October 2024. All data sourced from ARC’s global airline sales database.

Use the “Nonstop” filter when looking for direct Frontier Airlines flights from SAT to SAN. You’ll also be able to compare other airlines servicing the same direct route.

To find the earliest departures from SAT to SAN with Frontier Airlines, filter your search by “Morning” and “Early Morning.” Choosing an early flight generally means you’re less likely to experience cancellations.**Most reliable time of the day recommendation is based on January through August 2024 flight status data sourced from OAG’s global flight data platform.

Jump on a Frontier Airlines flight from San Antonio Intl. Airport (SAT) to San Diego, and you’ll most likely touch down at San Diego Intl. Airport (SAN). This is the airline’s primary hub in this destination.

A rewarding loyalty program and the ability to rack up points through Frontier Miles are the start of the reasons to jet off from SAT to SAN with Frontier Airlines. Plus, by joining Expedia’s free One Key™ program, you can receive OneKeyCash™* alongside any airline loyalty program earnings. You can put it toward your future trips.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.

It’s generally possible to cancel or modify your flight, although there may be a charge if your booking was made over 24 hours ago. Prefer to keep your options open? Use our “No cancel fee” and “Changes included” filters to find flights that won’t charge extra if you need to alter your plans. To modify your booking, head to “Trips,” select your flight and click on “Manage Booking” for more information.