EC 3651 then GQ 388 at Athens
Milan → Athens → Thessaloniki
Timetable, Athens time
23:00EC 3651 from Milan at the gate
19:00GQ 388 to Thessaloniki leaves the gate
20 h apart on the timetable, overnight
GQ 388 leaves 20 h after EC 3651 arrives on the timetable: more than half a day, so not a connection we count.