FR 6889 then OS 645 at Vienna
Tirana → Vienna → Prague
Timetable, Vienna time
21:45FR 6889 from Tirana at the gate
15:20OS 645 to Prague leaves the gate
17 h 35 apart on the timetable, overnight
OS 645 leaves 17 h 35 after FR 6889 arrives on the timetable: more than half a day, so not a connection we count.