SM 651 then EC 3656 at Athens
Cairo → Athens → Milan
Timetable, Athens time
17:00SM 651 from Cairo at the gate
11:10EC 3656 to Milan leaves the gate
18 h 10 apart on the timetable, overnight
EC 3656 leaves 18 h 10 after SM 651 arrives on the timetable: more than half a day, so not a connection we count.