W4 6315 then VY 1630 at Barcelona
Milan → Barcelona → Santiago de Compostela
Timetable, Barcelona time
12:25W4 6315 from Milan at the gate
11:35VY 1630 to Santiago de Compostela leaves the gatealso IB 5209, LL 5209
23 h 10 apart on the timetable, overnight
VY 1630 leaves 23 h 10 after W4 6315 arrives on the timetable: more than half a day, so not a connection we count.