From Dublin Airport it is easy to avoid driving through Dublin city if so desired. Just follow signs for M50 ring road which brings you around the periphery of the city. Watch out for signs for the N7 (M7/M9) in the direction Limerick, Cork and Waterford. Take this exit from the M50 and continue on the N7, later M7 southwards. Watch for signs for the M9 in direction Waterford/Kilkenny and exit onto this road. Stay on M9 till you see signs for Rosslare/Enniscorthy/Bunclody on road N80. Just 20 minutes to Bunclody. Otherwise, take bus from Airport to central Bus Station in Dublin. A bus will take you from there direct to Bunclody (enquire for time and bus number).
From Rosslare Harbour follow road north in direction of Dublin, first N25 and then N11, passing through Enniscorthy. Few km north of Enniscorthy, take N80 road signed for Carlow. this takes you direct to Bunclody.