Frontier has round-trip flights from Austin or San Antonio (AUS, SAT) to Denver, Las Vegas, Atlanta, or Orlando (DEN, LAS, ATL, MCO) for $38, NONSTOP. Flights September to November. Departures on Monday, Tuesday, Wednesday, Thursday, and Saturday. Extended weekends available. Origin/Destination reversible. No Thanksgiving dates.
Cheapest flights for Atlanta and Orlando are via San Antonio.