GQ 391 then EC 3652 at Athens
Thessaloniki → Athens → Milan
Timetable, Athens time
08:25GQ 391 from Thessaloniki at the gate
23:45EC 3652 to Milan leaves the gate
15 h 20 apart on the timetable
EC 3652 leaves 15 h 20 after GQ 391 arrives on the timetable: more than half a day, so not a connection we count.