FR 5825 then FB 808 at Athens
Venezia → Athens → Sofia
Timetable, Athens time
20:00FR 5825 from Venezia at the gate
17:00FB 808 to Sofia leaves the gate
21 h apart on the timetable, overnight
FB 808 leaves 21 h after FR 5825 arrives on the timetable: more than half a day, so not a connection we count.