A3 781 then SN 3246 at Athens
Zagreb → Athens → Brussels
Timetable, Athens time
12:15A3 781 from Zagreb at the gate
12:05SN 3246 to Brussels leaves the gate
23 h 50 apart on the timetable, overnight
SN 3246 leaves 23 h 50 after A3 781 arrives on the timetable: more than half a day, so not a connection we count.