| Cheap Flights: Austin to/from San Francisco $116-$123 r/t [March-May] â Alaska Airlines / JetBlue Alaska Airlines and JetBlue have round-trip flights from Austin (AUS) to San Francisco (SFO) for $116-$123 with a connection. Flights March to May. No Weekends. Departures on Monday, Tuesday, Wednesday, and Thursday. Origin/Destination reversible. Outbound flight has a short 30-minute connection. Click for more details and booking links Cheap Flights: Austin to/from San Francisco $116-$123 r/t [March-May] â Alaska Airlines / JetBlue . | 