FR 3109 then FR 878 at Barcelona
Luxembourg → Barcelona → Venezia
Timetable, Barcelona time
13:30FR 3109 from Luxembourg at the gate
08:30FR 878 to Venezia leaves the gate
19 h apart on the timetable, overnight
FR 878 leaves 19 h after FR 3109 arrives on the timetable: more than half a day, so not a connection we count.