A3 821 then SM 652 at Athens
Berlin → Athens → Cairo
Timetable, Athens time
15:05A3 821 from Berlin at the gate
11:55SM 652 to Cairo leaves the gate
20 h 50 apart on the timetable, overnight
SM 652 leaves 20 h 50 after A3 821 arrives on the timetable: more than half a day, so not a connection we count.