PU 502 then KL 3354 at Madrid
Buenos Aires → Madrid → Bilbao
Timetable, Madrid time
15:45PU 502 from Buenos Aires at the gate
10:45KL 3354 to Bilbao leaves the gatealso EY 4335, MU 4974, AM 6891, AD 6934, UX 7157
19 h apart on the timetable, overnight
KL 3354 leaves 19 h after PU 502 arrives on the timetable: more than half a day, so not a connection we count.