IB 5375 then SN 3704 at Barcelona
Firenze → Barcelona → Brussels
Timetable, Barcelona time
17:55IB 5375 from Firenze at the gatealso LL 5375, VY 6075
17:40SN 3704 to Brussels leaves the gate
23 h 45 apart on the timetable, overnight
SN 3704 leaves 23 h 45 after IB 5375 arrives on the timetable: more than half a day, so not a connection we count.