FR 835 then FR 3108 at Barcelona
Vilnius → Barcelona → Luxembourg
Timetable, Barcelona time
10:30FR 835 from Vilnius at the gate
08:35FR 3108 to Luxembourg leaves the gate
22 h 05 apart on the timetable, overnight
FR 3108 leaves 22 h 05 after FR 835 arrives on the timetable: more than half a day, so not a connection we count.