IB 5877 then QR 3622 at Barcelona
Paris Orly → Barcelona → Firenze
Timetable, Barcelona time
22:30IB 5877 from Paris Orly at the gatealso LL 5877, VY 8027
10:45QR 3622 to Firenze leaves the gatealso IB 5372, LL 5372, VY 6072
12 h 15 apart on the timetable, overnight
QR 3622 leaves 12 h 15 after IB 5877 arrives on the timetable: more than half a day, so not a connection we count.