FR 3977 then IB 5364 at Barcelona
Dublin → Barcelona → Milan
Timetable, Barcelona time
21:10FR 3977 from Dublin at the gate
18:10IB 5364 to Milan leaves the gatealso LL 5364, VY 6052
21 h apart on the timetable, overnight
IB 5364 leaves 21 h after FR 3977 arrives on the timetable: more than half a day, so not a connection we count.