| Cheap Flights: Austin to Dublin $553 r/t [September-October] â American Airlines American Airlines has round-trip flights from Austin (AUS) to Dublin (DUB) for $553 with a connection. Flights September to October. Departures on Monday, Tuesday, Wednesday, and Sunday. 7-day minimum stay required. Click for more details and booking links Cheap Flights: Austin to Dublin $553 r/t [September-October] â American Airlines . | 