A3 293 then A3 866 at Athens
Kefalonia → Athens → Prague
Timetable, Athens time
21:05A3 293 from Kefalonia at the gate
17:15A3 866 to Prague leaves the gate
20 h 10 apart on the timetable, overnight
A3 866 leaves 20 h 10 after A3 293 arrives on the timetable: more than half a day, so not a connection we count.