| Cheap Flights: Austin to Dublin $483-$493 r/t [January-March] â United / Air Canada United and Air Canada have round-trip flights from Austin (AUS) to Dublin (DUB) for $483-$493 with a connection. Flights January to March. Departures on Monday, Tuesday, Wednesday, and Sunday. 7-day minimum stay required. Carry-on bag is allowed for free. You can avoid any seat selection fees by accepting the randomly assigned seat at check-in. Click for more details and booking links Cheap Flights: Austin to Dublin $483-$493 r/t [January-March] â United / Air Canada . | 