| Cheap Flights: Austin to Nassau, Bahamas $248-$280 r/t [September-October] â JetBlue JetBlue has round-trip flights from Austin (AUS) to Nassau (NAS) for $248-$280 with a connection. Flights September to October. Very few extended weekends available. Click for more details and booking links Cheap Flights: Austin to Nassau, Bahamas $248-$280 r/t [September-October] â JetBlue . | 