GQ 381 then GQ 830 at Athens
Thessaloniki → Athens → Milan
Timetable, Athens time
10:25GQ 381 from Thessaloniki at the gate
08:00GQ 830 to Milan leaves the gate
21 h 35 apart on the timetable, overnight
GQ 830 leaves 21 h 35 after GQ 381 arrives on the timetable: more than half a day, so not a connection we count.