BA 482 then QR 146 at Barcelona
London Heathrow → Barcelona → Doha
Timetable, Barcelona time
17:15BA 482 from London Heathrow at the gate
15:20QR 146 to Doha leaves the gate
22 h 05 apart on the timetable, overnight
QR 146 leaves 22 h 05 after BA 482 arrives on the timetable: more than half a day, so not a connection we count.