BA 472 then QR 3547 at Barcelona
London Heathrow → Barcelona → Santiago de Compostela
Timetable, Barcelona time
09:10BA 472 from London Heathrow at the gate
21:15QR 3547 to Santiago de Compostela leaves the gate
12 h 05 apart on the timetable
QR 3547 leaves 12 h 05 after BA 472 arrives on the timetable: more than half a day, so not a connection we count.