EW 7520 then IB 5480 at Barcelona
Hamburg → Barcelona → Nantes
Timetable, Barcelona time
18:45EW 7520 from Hamburg at the gate
10:15IB 5480 to Nantes leaves the gatealso VY 8140
15 h 30 apart on the timetable, overnight
IB 5480 leaves 15 h 30 after EW 7520 arrives on the timetable: more than half a day, so not a connection we count.