IB 424 then CX 1751 at Madrid
Barcelona → Madrid → Buenos Aires
Timetable, Madrid time
22:40IB 424 from Barcelona at the gatealso IB 424S, LA 1589, LL 3024, VY 5100, AY 5576, AV 6173, BA 7084, QR 8067
12:20CX 1751 to Buenos Aires leaves the gatealso BA 4255, AY 5375
13 h 40 apart on the timetable, overnight
CX 1751 leaves 13 h 40 after IB 424 arrives on the timetable: more than half a day, so not a connection we count.