IB 5379 then IB 2601 at Barcelona
Santander → Barcelona → Buenos Aires
Timetable, Barcelona time
10:25IB 5379 from Santander at the gate
00:30IB 2601 to Buenos Aires leaves the gatealso LL 2601, AY 5351, QR 7231
14 h 05 apart on the timetable, overnight
IB 2601 leaves 14 h 05 after IB 5379 arrives on the timetable: more than half a day, so not a connection we count.