A3 710 then QR 3514 at Barcelona
Athens → Barcelona → Bilbao
Timetable, Barcelona time
10:25A3 710 from Athens at the gate
08:00QR 3514 to Bilbao leaves the gate
21 h 35 apart on the timetable, overnight
QR 3514 leaves 21 h 35 after A3 710 arrives on the timetable: more than half a day, so not a connection we count.