FR 44 then OS 761 at Vienna
Athens → Vienna → Skopje
Timetable, Vienna time
17:25FR 44 from Athens at the gate
10:15OS 761 to Skopje leaves the gatealso UA 9835
16 h 50 apart on the timetable, overnight
OS 761 leaves 16 h 50 after FR 44 arrives on the timetable: more than half a day, so not a connection we count.