LL 5481 then FR 3976 at Barcelona
Nantes → Barcelona → Dublin
Timetable, Barcelona time
14:25LL 5481 from Nantes at the gate
06:20FR 3976 to Dublin leaves the gate
15 h 55 apart on the timetable, overnight
FR 3976 leaves 15 h 55 after LL 5481 arrives on the timetable: more than half a day, so not a connection we count.