LA 5812 then LA 5763 at Barcelona
Nice → Barcelona → Firenze
Timetable, Barcelona time
00:35LA 5812 from Nice at the gatealso IB 5941, VY 8137
18:45LA 5763 to Firenze leaves the gate
18 h 10 apart on the timetable
LA 5763 leaves 18 h 10 after LA 5812 arrives on the timetable: more than half a day, so not a connection we count.