GQ 401 then GQ 30 at Athens
Naxos → Athens → Kalymnos
Timetable, Athens time
15:00GQ 401 from Naxos at the gate
11:45GQ 30 to Kalymnos leaves the gate
20 h 45 apart on the timetable, overnight
GQ 30 leaves 20 h 45 after GQ 401 arrives on the timetable: more than half a day, so not a connection we count.