OS 780 then OS 1159 at Vienna
Sofia → Vienna → Tirana
Timetable, Vienna time
08:35OS 780 from Sofia at the gate
05:45OS 1159 to Tirana leaves the gate
21 h 10 apart on the timetable, overnight
OS 1159 leaves 21 h 10 after OS 780 arrives on the timetable: more than half a day, so not a connection we count.