GQ 681 then A3 654 at Athens
Sofia → Athens → Rome
Timetable, Athens time
21:55GQ 681 from Sofia at the gate
16:25A3 654 to Rome leaves the gate
18 h 30 apart on the timetable, overnight
A3 654 leaves 18 h 30 after GQ 681 arrives on the timetable: more than half a day, so not a connection we count.