QR 3617 then VY 1304 at Barcelona
Nantes → Barcelona → Alicante
Timetable, Barcelona time
13:55QR 3617 from Nantes at the gatealso IB 5481, LL 5481, VY 8141
11:25VY 1304 to Alicante leaves the gatealso QR 3615, IB 5130
21 h 30 apart on the timetable, overnight
VY 1304 leaves 21 h 30 after QR 3617 arrives on the timetable: more than half a day, so not a connection we count.