EW 520 then QR 3661 at Barcelona
Cologne → Barcelona → Milan
Timetable, Barcelona time
16:50EW 520 from Cologne at the gate
15:55QR 3661 to Milan leaves the gatealso IB 5360, LL 5360, VY 6048
23 h 05 apart on the timetable, overnight
QR 3661 leaves 23 h 05 after EW 520 arrives on the timetable: more than half a day, so not a connection we count.