EW 7520 then QR 3659 at Barcelona
Hamburg → Barcelona → Milan
Timetable, Barcelona time
16:20EW 7520 from Hamburg at the gate
12:40QR 3659 to Milan leaves the gatealso IB 5356, LL 5356, VY 6044
20 h 20 apart on the timetable, overnight
QR 3659 leaves 20 h 20 after EW 7520 arrives on the timetable: more than half a day, so not a connection we count.