OS 640 then OS 1159 at Vienna
Budapest → Vienna → Tirana
Timetable, Vienna time
08:40OS 640 from Budapest at the gate
05:45OS 1159 to Tirana leaves the gate
21 h 05 apart on the timetable, overnight
OS 1159 leaves 21 h 05 after OS 640 arrives on the timetable: more than half a day, so not a connection we count.