GQ 2 then EC 3656 at Athens
Kastoria → Athens → Milan
Timetable, Athens time
16:15GQ 2 from Kastoria at the gate
11:10EC 3656 to Milan leaves the gate
18 h 55 apart on the timetable, overnight
EC 3656 leaves 18 h 55 after GQ 2 arrives on the timetable: more than half a day, so not a connection we count.