IB 538 then CX 1751 at Madrid
Lisbon → Madrid → Buenos Aires
Timetable, Madrid time
23:10IB 538 from Lisbon at the gatealso LA 1532, VY 5066, AA 8708
12:10CX 1751 to Buenos Aires leaves the gatealso BA 4255, AY 5375
13 h apart on the timetable, overnight
CX 1751 leaves 13 h after IB 538 arrives on the timetable: more than half a day, so not a connection we count.