FR 3181 then FR 3108 at Barcelona
Rome → Barcelona → Luxembourg
Timetable, Barcelona time
10:25FR 3181 from Rome at the gate
06:15FR 3108 to Luxembourg leaves the gate
19 h 50 apart on the timetable, overnight
FR 3108 leaves 19 h 50 after FR 3181 arrives on the timetable: more than half a day, so not a connection we count.