FB 807 then A3 994 at Athens
Sofia → Athens → Istanbul
Timetable, Athens time
19:50FB 807 from Sofia at the gate
18:30A3 994 to Istanbul leaves the gate
22 h 40 apart on the timetable, overnight
A3 994 leaves 22 h 40 after FB 807 arrives on the timetable: more than half a day, so not a connection we count.