FR 2403 then IB 5374 at Barcelona
Seville → Barcelona → Firenze
Timetable, Barcelona time
17:20FR 2403 from Seville at the gate
12:45IB 5374 to Firenze leaves the gatealso LL 5374, VY 6074
19 h 25 apart on the timetable, overnight
IB 5374 leaves 19 h 25 after FR 2403 arrives on the timetable: more than half a day, so not a connection we count.