$84 Cheap Frontier Airlines flights San Diego (SAN) to Austin (AUS)

Scoring cheap one-way Frontier Airlines flights from SAN to AUS from $84 on Expedia is a breeze — just filter by “Price (lowest to highest).” Or check out our affordable return fares from $132 for your next adventure.**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.

January is one of the most affordable months to get away to Austin with Frontier Airlines. You could also find excellent prices on one-way and round-trip fares in December.

Start searching one to three months ahead of your travel date to get cheap fares on Frontier Airlines flights from San Diego Intl. Airport (SAN) to Austin-Bergstrom Intl. Airport (AUS). You can save 25% by booking your domestic flight 34 to 86 days in advance compared to last-minute reservations made 6 to 12 days out. You could also reduce costs by buying your fare on a Sunday, as it’s 6% cheaper on average than a Monday, the most expensive day to book.* Time it well, and you can enjoy significant savings on domestic trips.*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.

Click on the “Nonstop” filter when browsing for direct Frontier Airlines flights from SAN to AUS. It’s also a good way to compare other airlines offering the same nonstop journey.

Search Frontier Airlines’s earliest flights from SAN to AUS by using our “Morning” and “Early Morning” filters. Not only will you arrive sooner, early departures are also 20% less likely to be canceled.**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.

Austin-Bergstrom Intl. Airport (AUS) is the primary Austin hub for Frontier Airlines flights from San Diego Intl. Airport (SAN).

Offering a rewarding loyalty program, Frontier Airlines is a top pick for many passengers departing from SAN to AUS. Plus, as a Frontier Miles and One Key™ member booking through Expedia, you could earn OneKeyCash™* on eligible flights along with your airline miles.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.

Changes are typically free within 24 hours of making a booking, but your airline may charge you after that time. For more information about altering your flights, head to your “Trips,” select your flight and click on “Manage Booking.” If you want the flexibility to make changes without additional charges, check the “Changes included” and “No cancel fee” filters when organizing your next adventure.