V7 2164 then SN 3704 at Barcelona
Nantes → Barcelona → Brussels
Timetable, Barcelona time
20:10V7 2164 from Nantes at the gate
17:40SN 3704 to Brussels leaves the gate
21 h 30 apart on the timetable, overnight
SN 3704 leaves 21 h 30 after V7 2164 arrives on the timetable: more than half a day, so not a connection we count.