BA 472 then QR 3655 at Barcelona
London Heathrow → Barcelona → Nice
Timetable, Barcelona time
09:10BA 472 from London Heathrow at the gate
21:20QR 3655 to Nice leaves the gate
12 h 10 apart on the timetable
QR 3655 leaves 12 h 10 after BA 472 arrives on the timetable: more than half a day, so not a connection we count.