BA 486 then QR 3535 at Barcelona
London Heathrow → Barcelona → Santiago de Compostela
Timetable, Barcelona time
17:55BA 486 from London Heathrow at the gate
09:10QR 3535 to Santiago de Compostela leaves the gate
15 h 15 apart on the timetable, overnight
QR 3535 leaves 15 h 15 after BA 486 arrives on the timetable: more than half a day, so not a connection we count.