W4 6315 then IB 5146 at Barcelona
Milan → Barcelona → Seville
Timetable, Barcelona time
12:25W4 6315 from Milan at the gate
09:10IB 5146 to Seville leaves the gate
20 h 45 apart on the timetable, overnight
IB 5146 leaves 20 h 45 after W4 6315 arrives on the timetable: more than half a day, so not a connection we count.