LL 5481 then QR 3678 at Barcelona
Nantes → Barcelona → Palermo
Timetable, Barcelona time
17:20LL 5481 from Nantes at the gate
15:40QR 3678 to Palermo leaves the gate
22 h 20 apart on the timetable, overnight
QR 3678 leaves 22 h 20 after LL 5481 arrives on the timetable: more than half a day, so not a connection we count.