IB 2471 then W4 6316 at Barcelona
Leon → Barcelona → Milan
Timetable, Barcelona time
21:35IB 2471 from Leon at the gatealso LL 3101, VY 5871, QR 6959
13:10W4 6316 to Milan leaves the gate
15 h 35 apart on the timetable, overnight
W4 6316 leaves 15 h 35 after IB 2471 arrives on the timetable: more than half a day, so not a connection we count.