GQ 321 then GQ 242 at Athens
Limnos → Athens → Chios
Timetable, Athens time
12:50GQ 321 from Limnos at the gate
11:00GQ 242 to Chios leaves the gate
22 h 10 apart on the timetable, overnight
GQ 242 leaves 22 h 10 after GQ 321 arrives on the timetable: more than half a day, so not a connection we count.