A3 983 then EC 3652 at Athens
Sofia → Athens → Milan
Timetable, Athens time
22:25A3 983 from Sofia at the gate
11:00EC 3652 to Milan leaves the gate
12 h 35 apart on the timetable, overnight
EC 3652 leaves 12 h 35 after A3 983 arrives on the timetable: more than half a day, so not a connection we count.