A3 991 then GQ 400 at Athens
Istanbul → Athens → Naxos
Timetable, Athens time
11:55A3 991 from Istanbul at the gate
10:10GQ 400 to Naxos leaves the gate
22 h 15 apart on the timetable, overnight
GQ 400 leaves 22 h 15 after A3 991 arrives on the timetable: more than half a day, so not a connection we count.