EW 7520 then QR 3691 at Barcelona
Hamburg → Barcelona → Venezia
Timetable, Barcelona time
18:45EW 7520 from Hamburg at the gate
12:40QR 3691 to Venezia leaves the gatealso IB 5382, LL 5382, LA 5793
17 h 55 apart on the timetable, overnight
QR 3691 leaves 17 h 55 after EW 7520 arrives on the timetable: more than half a day, so not a connection we count.