IB 5809 then IB 5374 at Barcelona
Palermo → Barcelona → Firenze
Timetable, Barcelona time
14:25IB 5809 from Palermo at the gatealso LL 5809, VY 6127
12:45IB 5374 to Firenze leaves the gatealso LL 5374, VY 6074
22 h 20 apart on the timetable, overnight
IB 5374 leaves 22 h 20 after IB 5809 arrives on the timetable: more than half a day, so not a connection we count.