EC 7152 then LG 3592 at Barcelona
Milan → Barcelona → Luxembourg
Timetable, Barcelona time
16:55EC 7152 from Milan at the gate
14:05LG 3592 to Luxembourg leaves the gate
21 h 10 apart on the timetable, overnight
LG 3592 leaves 21 h 10 after EC 7152 arrives on the timetable: more than half a day, so not a connection we count.