IB 5375 then AM 6359 at Barcelona
Firenze → Barcelona → Amsterdam
Timetable, Barcelona time
17:55IB 5375 from Firenze at the gatealso LL 5375, VY 6075
17:25AM 6359 to Amsterdam leaves the gatealso KE 6406
23 h 30 apart on the timetable, overnight
AM 6359 leaves 23 h 30 after IB 5375 arrives on the timetable: more than half a day, so not a connection we count.