IB 656 then CX 1751 at Madrid
Rome → Madrid → Buenos Aires
Timetable, Madrid time
22:55IB 656 from Rome at the gatealso LA 1547, VY 5237
11:45CX 1751 to Buenos Aires leaves the gatealso BA 4255, AY 5375
12 h 50 apart on the timetable, overnight
CX 1751 leaves 12 h 50 after IB 656 arrives on the timetable: more than half a day, so not a connection we count.