EC 7152 then LG 3594 at Barcelona
Milan → Barcelona → Luxembourg
Timetable, Barcelona time
16:55EC 7152 from Milan at the gate
14:20LG 3594 to Luxembourg leaves the gate
21 h 25 apart on the timetable, overnight
LG 3594 leaves 21 h 25 after EC 7152 arrives on the timetable: more than half a day, so not a connection we count.