FR 6889 then OS 775 at Vienna
Tirana → Vienna → Sofia
Timetable, Vienna time
21:45FR 6889 from Tirana at the gate
15:30OS 775 to Sofia leaves the gate
17 h 45 apart on the timetable, overnight
OS 775 leaves 17 h 45 after FR 6889 arrives on the timetable: more than half a day, so not a connection we count.