GQ 381 then EC 3652 at Athens
Thessaloniki → Athens → Milan
Timetable, Athens time
10:25GQ 381 from Thessaloniki at the gate
23:45EC 3652 to Milan leaves the gate
13 h 20 apart on the timetable
EC 3652 leaves 13 h 20 after GQ 381 arrives on the timetable: more than half a day, so not a connection we count.