EC 4795 then FR 7157 at Madrid
Nantes → Madrid → Dublin
Timetable, Madrid time
13:00EC 4795 from Nantes at the gate
07:00FR 7157 to Dublin leaves the gate
18 h apart on the timetable, overnight
FR 7157 leaves 18 h after EC 4795 arrives on the timetable: more than half a day, so not a connection we count.