A3 275 then GQ 220 at Athens
Chios → Athens → Kos
Timetable, Athens time
17:00A3 275 from Chios at the gate
07:05GQ 220 to Kos leaves the gate
14 h 05 apart on the timetable, overnight
GQ 220 leaves 14 h 05 after A3 275 arrives on the timetable: more than half a day, so not a connection we count.