| Nonstop Flights: Austin to/from Las Vegas $59-$68 r/t [March-May] â Spirit Spirit has round-trip flights from Austin (AUS) to Las Vegas (LAS) for $59-$68, NONSTOP. Flights March to May. Very few weekends available. Origin/Destination reversible. Note: Spirit fares do not include a free carry-on bag. Only a small personal item, like a Jansport City Scout backpack is free. You can avoid paying for seat selection if you accept the randomly assigned seat prior to boarding. Click for more details and booking links Nonstop Flights: Austin to/from Las Vegas $59-$68 r/t [March-May] â Spirit . | 
