$114 Cheap United flights Austin (AUS) to San Diego (SAN)

Use the “Price (lowest to highest)” filter on Expedia to look for cheap United Airlines return flights from $147 from AUS to SAN. Affordable one-way tickets from $114 are also on offer.**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.

United Airlines flights to San Diego are usually more affordable in the quieter months of January and November. Whether you’re after a one-way or a return ticket, you could find a better deal then.

Start searching one to three months before your departure to score cheaper fares on United Airlines flights from Austin-Bergstrom Intl. Airport (AUS) to San Diego Intl. Airport (SAN). 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 cut costs by buying your fare on a Sunday, as it’s 6% cheaper on average than a Monday, the most expensive day to book.* Get your timing spot on, 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.

To figure out if there’s a direct journey from AUS to SAN with United Airlines or any other carriers, select the “Nonstop” filter when browsing for flights.

To find the earliest departure from AUS to SAN with United Airlines, sort your results by “Early Morning” and “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.

United Airlines flights from Austin-Bergstrom Intl. Airport (AUS) to San Diego come in to San Diego Intl. Airport (SAN). This is the main gateway to this city.

With a rewarding loyalty program, United Airlines is a top choice for many passengers heading from AUS to SAN. Plus, as a United Mileage Plus 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.

Typically, you can cancel or modify your flight, although there may be additional charges if you booked more than 24 hours ago. Need to keep your options open? Use Expedia’s “Changes included” and “No cancel fee” filters to find flights that won’t penalize you if you have to revise your plans. To make modifications, go to “Trips,” select your flight and click on “Manage Booking” for more details.