FR 12 then OS 775 at Vienna
Barcelona → Vienna → Sofia
Timetable, Vienna time
22:40FR 12 from Barcelona at the gate
15:30OS 775 to Sofia leaves the gate
16 h 50 apart on the timetable, overnight
OS 775 leaves 16 h 50 after FR 12 arrives on the timetable: more than half a day, so not a connection we count.