A3 981 then OA 42 at Athens
Sofia → Athens → Kithira
Timetable, Athens time
12:30A3 981 from Sofia at the gate
12:25OA 42 to Kithira leaves the gate
23 h 55 apart on the timetable, overnight
OA 42 leaves 23 h 55 after A3 981 arrives on the timetable: more than half a day, so not a connection we count.