LA 5799 then EC 7151 at Barcelona
Firenze → Barcelona → Milan
Timetable, Barcelona time
10:00LA 5799 from Firenze at the gate
07:30EC 7151 to Milan leaves the gate
21 h 30 apart on the timetable, overnight
EC 7151 leaves 21 h 30 after LA 5799 arrives on the timetable: more than half a day, so not a connection we count.