GQ 421 then A3 358 at Athens
Zakynthos → Athens → Santorini
Timetable, Athens time
17:45GQ 421 from Zakynthos at the gate
16:55A3 358 to Santorini leaves the gate
23 h 10 apart on the timetable, overnight
A3 358 leaves 23 h 10 after GQ 421 arrives on the timetable: more than half a day, so not a connection we count.