CA 863 then FB 808 at Athens
Beijing → Athens → Sofia
Timetable, Athens time
08:15CA 863 from Beijing at the gate
20:40FB 808 to Sofia leaves the gate
12 h 25 apart on the timetable
FB 808 leaves 12 h 25 after CA 863 arrives on the timetable: more than half a day, so not a connection we count.