Alaska Airlines has round-trip flights from Austin (AUS) to San Diego, San Francisco, or San Jose (SAN/SFO/SJC) for $157, NONSTOP. Flights January to March. Departures on Tuesday, Wednesday, and Saturday. Extended Weekends available. Origin/Destination reversible.
Note: Carry-on bag is allowed for free on Alaska Airlines. You can avoid paying for seat selection by accepting the randomly assigned seat at the gate.
Note: We covered San Francisco for $57 on Frontier 3-weeks ago, but Frontier charges an additional +$60 for carry-on bags, and there were additional fees on top of that.