Belfast–Newry line
A single service operated by Iarnród Éireann also runs on weekday mornings between Newry and Dublin Connolly along the Belfast–Dublin line , calling at all stations in between . 
<triplet> Dublin Connolly <subj> Iarnród Éireann <obj> operator <subj> Belfast–Dublin line <obj> connecting line <triplet> Belfast–Dublin line <subj> Iarnród Éireann <obj> operator