LL 5457 then QR 3573 at Barcelona
Vigo → Barcelona → Cagliari
Timetable, Barcelona time
11:45LL 5457 from Vigo at the gate
11:05QR 3573 to Cagliari leaves the gate
23 h 20 apart on the timetable, overnight
QR 3573 leaves 23 h 20 after LL 5457 arrives on the timetable: more than half a day, so not a connection we count.