EW 2520 then LA 5744 at Barcelona
Stuttgart → Barcelona → Nantes
Timetable, Barcelona time
14:25EW 2520 from Stuttgart at the gate
13:40LA 5744 to Nantes leaves the gate
23 h 15 apart on the timetable, overnight
LA 5744 leaves 23 h 15 after EW 2520 arrives on the timetable: more than half a day, so not a connection we count.