IB 5939 then QR 3573 at Barcelona
Marseille → Barcelona → Cagliari
Timetable, Barcelona time
15:30IB 5939 from Marseille at the gatealso LL 5939, VY 8133
11:05QR 3573 to Cagliari leaves the gate
19 h 35 apart on the timetable, overnight
QR 3573 leaves 19 h 35 after IB 5939 arrives on the timetable: more than half a day, so not a connection we count.