IB 426 then EC 1704 at Madrid
Barcelona → Madrid → Nice
Timetable, Madrid time
08:25IB 426 from Barcelona at the gatealso CX 1834, LL 3026, VY 5008, QR 5085, AT 5323, AY 5572, AV 6005, AA 8798
21:20EC 1704 to Nice leaves the gate
12 h 55 apart on the timetable
EC 1704 leaves 12 h 55 after IB 426 arrives on the timetable: more than half a day, so not a connection we count.