3E 2305 then A3 734 at Athens
Sofia → Athens → Tunis
Timetable, Athens time
11:503E 2305 from Sofia at the gate
08:00A3 734 to Tunis leaves the gate
20 h 10 apart on the timetable, overnight
A3 734 leaves 20 h 10 after 3E 2305 arrives on the timetable: more than half a day, so not a connection we count.