GQ 345 then EC 3656 at Athens
Santorini → Athens → Milan
Timetable, Athens time
19:35GQ 345 from Santorini at the gate
10:50EC 3656 to Milan leaves the gate
15 h 15 apart on the timetable, overnight
EC 3656 leaves 15 h 15 after GQ 345 arrives on the timetable: more than half a day, so not a connection we count.