OS 554 then FR 182 at Vienna
Rome → Vienna → Sofia
Timetable, Vienna time
16:45OS 554 from Rome at the gate
11:40FR 182 to Sofia leaves the gate
18 h 55 apart on the timetable, overnight
FR 182 leaves 18 h 55 after OS 554 arrives on the timetable: more than half a day, so not a connection we count.