QR 3630 then QR 3655 at Barcelona
Firenze → Barcelona → Valletta
Timetable, Barcelona time
14:55QR 3630 from Firenze at the gatealso IB 5375, LL 5375, VY 6075
13:00QR 3655 to Valletta leaves the gatealso IB 5118, LL 5118
22 h 05 apart on the timetable, overnight
QR 3655 leaves 22 h 05 after QR 3630 arrives on the timetable: more than half a day, so not a connection we count.