GQ 461 then GQ 294 at Athens
Karpathos → Athens → Alexandroupolis
Timetable, Athens time
21:15GQ 461 from Karpathos at the gate
20:05GQ 294 to Alexandroupolis leaves the gate
22 h 50 apart on the timetable, overnight
GQ 294 leaves 22 h 50 after GQ 461 arrives on the timetable: more than half a day, so not a connection we count.