EC 7154 then IB 5156 at Barcelona
Milan → Barcelona → Seville
Timetable, Barcelona time
23:15EC 7154 from Milan at the gate
18:50IB 5156 to Seville leaves the gate
19 h 35 apart on the timetable, overnight
IB 5156 leaves 19 h 35 after EC 7154 arrives on the timetable: more than half a day, so not a connection we count.