GQ 681 then A3 664 at Athens
Sofia → Athens → Milan
Timetable, Athens time
21:55GQ 681 from Sofia at the gate
16:15A3 664 to Milan leaves the gate
18 h 20 apart on the timetable, overnight
A3 664 leaves 18 h 20 after GQ 681 arrives on the timetable: more than half a day, so not a connection we count.