A3 710 then FR 878 at Barcelona
Athens → Barcelona → Venezia
Timetable, Barcelona time
10:25A3 710 from Athens at the gate
08:30FR 878 to Venezia leaves the gate
22 h 05 apart on the timetable, overnight
FR 878 leaves 22 h 05 after A3 710 arrives on the timetable: more than half a day, so not a connection we count.