FR 678 then FR 182 at Vienna
Bucharest → Vienna → Sofia
Timetable, Vienna time
14:10FR 678 from Bucharest at the gate
11:40FR 182 to Sofia leaves the gate
21 h 30 apart on the timetable, overnight
FR 182 leaves 21 h 30 after FR 678 arrives on the timetable: more than half a day, so not a connection we count.