BA 488 then QR 3616 at Barcelona
London Heathrow → Barcelona → Firenze
Timetable, Barcelona time
19:15BA 488 from London Heathrow at the gate
18:45QR 3616 to Firenze leaves the gate
23 h 30 apart on the timetable, overnight
QR 3616 leaves 23 h 30 after BA 488 arrives on the timetable: more than half a day, so not a connection we count.