OS 110 then FR 182 at Vienna
Klagenfurt → Vienna → Sofia
Timetable, Vienna time
12:00OS 110 from Klagenfurt at the gate
11:40FR 182 to Sofia leaves the gate
23 h 40 apart on the timetable, overnight
FR 182 leaves 23 h 40 after OS 110 arrives on the timetable: more than half a day, so not a connection we count.