BA 478 then QR 3671 at Barcelona
London Heathrow → Barcelona → Valladolid
Timetable, Barcelona time
12:40BA 478 from London Heathrow at the gate
12:20QR 3671 to Valladolid leaves the gate
23 h 40 apart on the timetable, overnight
QR 3671 leaves 23 h 40 after BA 478 arrives on the timetable: more than half a day, so not a connection we count.