Is there any buses from Kilkeel to Dublin city Center? I would like to spend a day in Dublin.
sorry, I am wrong, I was thinking you meant the Kilkeel in Clare!! Or are you thinking of Kilkeel in Clare?
Kilkee is is Co Clare, but Kilkeel is in Co Down.
You may want to look at the Translink journey planner to see what is involved. The bus from Kilkeel takes an hour to get to Newry (Ulsterbus 39) while the bus to Dublin (X1) takes 90 minutes. So depending on connect times, this could well be a 3 and a half hour total time.