FR 10 then IB 421 at Madrid
Dublin → Madrid → Barcelona
Timetable, Madrid time
20:00FR 10 from Dublin at the gate
18:00IB 421 to Barcelona leaves the gatealso LL 3021, VY 5122, AV 6170, QR 6971
22 h apart on the timetable, overnight
IB 421 leaves 22 h after FR 10 arrives on the timetable: more than half a day, so not a connection we count.