Nonstop Flights: Austin to/from Las Vegas $55-$87 r/t [July-October] â Frontier / Allegiant Frontier and Allegiant have round-trip flights from Austin (AUS) to Las Vegas (LAS) for $55-$87, NONSTOP. Flights July to October. Extended weekends available. Origin/Destination reversible. Click for more details and booking links Nonstop Flights: Austin to/from Las Vegas $55-$87 r/t [July-October] â Frontier / Allegiant . |