IB 2471 then IB 5150 at Barcelona
Leon → Barcelona → Seville
Timetable, Barcelona time
21:35IB 2471 from Leon at the gatealso LL 3101, VY 5871, QR 6959
15:45IB 5150 to Seville leaves the gate
18 h 10 apart on the timetable, overnight
IB 5150 leaves 18 h 10 after IB 2471 arrives on the timetable: more than half a day, so not a connection we count.