A3 357 then GQ 260 at Athens
Santorini → Athens → Kefalonia
Timetable, Athens time
14:00A3 357 from Santorini at the gate
13:05GQ 260 to Kefalonia leaves the gate
23 h 05 apart on the timetable, overnight
GQ 260 leaves 23 h 05 after A3 357 arrives on the timetable: more than half a day, so not a connection we count.