A3 355 then GQ 242 at Athens
Santorini → Athens → Chios
Timetable, Athens time
12:40A3 355 from Santorini at the gate
11:00GQ 242 to Chios leaves the gate
22 h 20 apart on the timetable, overnight
GQ 242 leaves 22 h 20 after A3 355 arrives on the timetable: more than half a day, so not a connection we count.