| Nonstop Flights: Austin to/from San Diego $137 r/t [January-May] (Tue/Wed/Sat) â Alaska Airlines Alaska Airlines has round-trip flights from Austin (AUS) to San Diego (SAN) for $137, NONSTOP. Flights January to May. Departures on Tuesday, Wednesday, and Saturday. Extended weekends available. Origin/Destination reversible. Carry-on bag is allowed for free on. You can avoid paying for seat selection by accepting the randomly assigned seat at the gate. Want a notification sent straight to your phone when any new deals are found? Join our Telegram channel and never miss another deal. Patreon supporters receive a recap of all the airfare deals currently available from Austin and San Antonio everyday. We donât charge a subscription fee. Our deal notifications are available for FREE via Instagram, Facebook, Twitter, Telegram, our Webpage, and our E-mail list. If you are paying someone a subscription fee for this content, you are being ripped off. Click for more details and booking links Nonstop Flights: Austin to/from San Diego $137 r/t [January-May] (Tue/Wed/Sat) â Alaska Airlines . | 