FR 4586 then QR 3691 at Barcelona
Porto → Barcelona → Venezia
Timetable, Barcelona time
19:45FR 4586 from Porto at the gate
12:40QR 3691 to Venezia leaves the gatealso IB 5382, LL 5382, LA 5793
16 h 55 apart on the timetable, overnight
QR 3691 leaves 16 h 55 after FR 4586 arrives on the timetable: more than half a day, so not a connection we count.