IB 5171 then IB 5376 at Barcelona
Bilbao → Barcelona → Firenze
Timetable, Barcelona time
18:50IB 5171 from Bilbao at the gate
18:45IB 5376 to Firenze leaves the gatealso LL 5376, VY 6076
23 h 55 apart on the timetable, overnight
IB 5376 leaves 23 h 55 after IB 5171 arrives on the timetable: more than half a day, so not a connection we count.