GQ 681 then MS 748 at Athens
Sofia → Athens → Cairo
Timetable, Athens time
21:55GQ 681 from Sofia at the gate
13:15MS 748 to Cairo leaves the gate
15 h 20 apart on the timetable, overnight
MS 748 leaves 15 h 20 after GQ 681 arrives on the timetable: more than half a day, so not a connection we count.