IB 5353 then LL 5480 at Barcelona
Milan → Barcelona → Nantes
Timetable, Barcelona time
11:55IB 5353 from Milan at the gate
10:45LL 5480 to Nantes leaves the gate
22 h 50 apart on the timetable, overnight
LL 5480 leaves 22 h 50 after IB 5353 arrives on the timetable: more than half a day, so not a connection we count.