A3 275 then A3 354 at Athens
Chios → Athens → Santorini
Timetable, Athens time
17:00A3 275 from Chios at the gate
10:00A3 354 to Santorini leaves the gate
17 h apart on the timetable, overnight
A3 354 leaves 17 h after A3 275 arrives on the timetable: more than half a day, so not a connection we count.