FR 12 then A3 863 at Vienna
Barcelona → Vienna → Athens
Timetable, Vienna time
22:40FR 12 from Barcelona at the gate
18:30A3 863 to Athens leaves the gate
19 h 50 apart on the timetable, overnight
A3 863 leaves 19 h 50 after FR 12 arrives on the timetable: more than half a day, so not a connection we count.