OS 401 then FR 878 at Barcelona
Vienna → Barcelona → Venezia
Timetable, Barcelona time
09:10OS 401 from Vienna at the gatealso LA 5045
21:45FR 878 to Venezia leaves the gate
12 h 35 apart on the timetable
FR 878 leaves 12 h 35 after OS 401 arrives on the timetable: more than half a day, so not a connection we count.