A3 275 then GQ 670 at Athens
Chios → Athens → Istanbul
Timetable, Athens time
17:00A3 275 from Chios at the gate
06:55GQ 670 to Istanbul leaves the gate
13 h 55 apart on the timetable, overnight
GQ 670 leaves 13 h 55 after A3 275 arrives on the timetable: more than half a day, so not a connection we count.