IB 5375 then QR 3678 at Barcelona
Firenze → Barcelona → Palermo
Timetable, Barcelona time
16:55IB 5375 from Firenze at the gatealso LL 5375, VY 6075
15:40QR 3678 to Palermo leaves the gate
22 h 45 apart on the timetable, overnight
QR 3678 leaves 22 h 45 after IB 5375 arrives on the timetable: more than half a day, so not a connection we count.