EW 7520 then A3 711 at Barcelona
Hamburg → Barcelona → Athens
Timetable, Barcelona time
16:20EW 7520 from Hamburg at the gate
11:20A3 711 to Athens leaves the gate
19 h apart on the timetable, overnight
A3 711 leaves 19 h after EW 7520 arrives on the timetable: more than half a day, so not a connection we count.