BA 472 then QR 3616 at Barcelona
London Heathrow → Barcelona → Bilbao
Timetable, Barcelona time
09:15BA 472 from London Heathrow at the gate
21:35QR 3616 to Bilbao leaves the gate
12 h 20 apart on the timetable
QR 3616 leaves 12 h 20 after BA 472 arrives on the timetable: more than half a day, so not a connection we count.