| Nonstop Flights: Austin to/from San Francisco or San Diego $118 r/t [February-March] â Alaska Airlines Alaska Airlines has round-trip flights from Austin (AUS) to San Francisco or San Diego (SFO, SAN) for $118, NONSTOP. Flights February to March. Departures on Monday, Tuesday, Wednesday, Thursday, and Saturday. Extended weekends available. Origin/Destination reversible. Click for more details and booking links Nonstop Flights: Austin to/from San Francisco or San Diego $118 r/t [February-March] â Alaska Airlines . | 