IB 5939 then IB 5480 at Barcelona
Marseille → Barcelona → Nantes
Timetable, Barcelona time
15:30IB 5939 from Marseille at the gatealso LL 5939, VY 8133
10:45IB 5480 to Nantes leaves the gatealso VY 8140
19 h 15 apart on the timetable, overnight
IB 5480 leaves 19 h 15 after IB 5939 arrives on the timetable: more than half a day, so not a connection we count.