IB 620 then CX 1751 at Madrid
Geneva → Madrid → Buenos Aires
Timetable, Madrid time
22:50IB 620 from Geneva at the gatealso LA 1693, VY 5281, AY 5638, AA 8694
11:45CX 1751 to Buenos Aires leaves the gatealso BA 4255, AY 5375
12 h 55 apart on the timetable, overnight
CX 1751 leaves 12 h 55 after IB 620 arrives on the timetable: more than half a day, so not a connection we count.