SN 3697 then QR 3573 at Barcelona
Brussels → Barcelona → Cagliari
Timetable, Barcelona time
11:25SN 3697 from Brussels at the gate
11:05QR 3573 to Cagliari leaves the gate
23 h 40 apart on the timetable, overnight
QR 3573 leaves 23 h 40 after SN 3697 arrives on the timetable: more than half a day, so not a connection we count.