FR 4546 then W4 6728 at Barcelona
Porto → Barcelona → Venezia
Timetable, Barcelona time
09:45FR 4546 from Porto at the gate
22:30W4 6728 to Venezia leaves the gate
12 h 45 apart on the timetable
W4 6728 leaves 12 h 45 after FR 4546 arrives on the timetable: more than half a day, so not a connection we count.