IB 1402 then IB 103 at Madrid
Athens → Madrid → Buenos Aires
Timetable, Madrid time
02:45IB 1402 from Athens at the gate
23:55IB 103 to Buenos Aires leaves the gatealso CX 1752, BA 4291, AY 5371
21 h 10 apart on the timetable
IB 103 leaves 21 h 10 after IB 1402 arrives on the timetable: more than half a day, so not a connection we count.