EW 520 then IB 5146 at Barcelona
Cologne → Barcelona → Seville
Timetable, Barcelona time
16:50EW 520 from Cologne at the gate
16:30IB 5146 to Seville leaves the gate
23 h 40 apart on the timetable, overnight
IB 5146 leaves 23 h 40 after EW 520 arrives on the timetable: more than half a day, so not a connection we count.