EC 7154 then LL 5500 at Barcelona
Milan → Barcelona → Vigo
Timetable, Barcelona time
23:15EC 7154 from Milan at the gate
21:25LL 5500 to Vigo leaves the gate
22 h 10 apart on the timetable, overnight
LL 5500 leaves 22 h 10 after EC 7154 arrives on the timetable: more than half a day, so not a connection we count.