EC 7154 then DY 3659 at Barcelona
Milan → Barcelona → Copenhagen
Timetable, Barcelona time
17:15EC 7154 from Milan at the gate
14:45DY 3659 to Copenhagen leaves the gate
21 h 30 apart on the timetable, overnight
DY 3659 leaves 21 h 30 after EC 7154 arrives on the timetable: more than half a day, so not a connection we count.