OS 768 then FR 9485 at Vienna
Varna → Vienna → Cologne
Timetable, Vienna time
14:10OS 768 from Varna at the gate
08:15FR 9485 to Cologne leaves the gate
18 h 05 apart on the timetable, overnight
FR 9485 leaves 18 h 05 after OS 768 arrives on the timetable: more than half a day, so not a connection we count.