A3 981 then A3 780 at Athens
Sofia → Athens → Zagreb
Timetable, Athens time
12:30A3 981 from Sofia at the gate
07:35A3 780 to Zagreb leaves the gate
19 h 05 apart on the timetable, overnight
A3 780 leaves 19 h 05 after A3 981 arrives on the timetable: more than half a day, so not a connection we count.