BA 8083 then QR 3566 at Barcelona
London Heathrow → Barcelona → Rome
Timetable, Barcelona time
13:10BA 8083 from London Heathrow at the gate
10:05QR 3566 to Rome leaves the gate
20 h 55 apart on the timetable, overnight
QR 3566 leaves 20 h 55 after BA 8083 arrives on the timetable: more than half a day, so not a connection we count.