EC 1703 then IB 415 at Madrid
Nice → Madrid → Barcelona
Timetable, Madrid time
20:40EC 1703 from Nice at the gate
14:55IB 415 to Barcelona leaves the gatealso IB 415S, LA 1522, LL 3015, VY 5057, AV 6016, QR 6889, BA 7134, AA 8630
18 h 15 apart on the timetable, overnight
IB 415 leaves 18 h 15 after EC 1703 arrives on the timetable: more than half a day, so not a connection we count.