KL 1519 then IB 5376 at Barcelona
Amsterdam → Barcelona → Firenze
Timetable, Barcelona time
19:00KL 1519 from Amsterdam at the gatealso MU 4417, AM 6302, SV 6336, DL 9253
18:45IB 5376 to Firenze leaves the gatealso LL 5376, VY 6076
23 h 45 apart on the timetable, overnight
IB 5376 leaves 23 h 45 after KL 1519 arrives on the timetable: more than half a day, so not a connection we count.