FR 6875 then QR 3573 at Barcelona
Dublin → Barcelona → Cagliari
Timetable, Barcelona time
14:50FR 6875 from Dublin at the gate
11:05QR 3573 to Cagliari leaves the gate
20 h 15 apart on the timetable, overnight
QR 3573 leaves 20 h 15 after FR 6875 arrives on the timetable: more than half a day, so not a connection we count.