IB 5355 then LA 5765 at Barcelona
Milan → Barcelona → Firenze
Timetable, Barcelona time
14:55IB 5355 from Milan at the gatealso LL 5355, VY 6043
12:45LA 5765 to Firenze leaves the gate
21 h 50 apart on the timetable, overnight
LA 5765 leaves 21 h 50 after IB 5355 arrives on the timetable: more than half a day, so not a connection we count.