DY 3658 then IB 5344 at Barcelona
Copenhagen → Barcelona → Rome
Timetable, Barcelona time
20:00DY 3658 from Copenhagen at the gate
17:20IB 5344 to Rome leaves the gate
21 h 20 apart on the timetable, overnight
IB 5344 leaves 21 h 20 after DY 3658 arrives on the timetable: more than half a day, so not a connection we count.