A3 293 then A3 358 at Athens
Kefalonia → Athens → Santorini
Timetable, Athens time
21:05A3 293 from Kefalonia at the gate
17:10A3 358 to Santorini leaves the gate
20 h 05 apart on the timetable, overnight
A3 358 leaves 20 h 05 after A3 293 arrives on the timetable: more than half a day, so not a connection we count.