EW 2520 then IB 5376 at Barcelona
Stuttgart → Barcelona → Firenze
Timetable, Barcelona time
08:35EW 2520 from Stuttgart at the gate
21:10IB 5376 to Firenze leaves the gatealso LL 5376, VY 6076
12 h 35 apart on the timetable
IB 5376 leaves 12 h 35 after EW 2520 arrives on the timetable: more than half a day, so not a connection we count.