OS 604 then FR 182 at Vienna
Zagreb → Vienna → Sofia
Timetable, Vienna time
11:55OS 604 from Zagreb at the gate
11:40FR 182 to Sofia leaves the gate
23 h 45 apart on the timetable, overnight
FR 182 leaves 23 h 45 after OS 604 arrives on the timetable: more than half a day, so not a connection we count.