QR 3774 then IB 2603 at Barcelona
Torino → Barcelona → Buenos Aires
Timetable, Barcelona time
16:25QR 3774 from Torino at the gatealso IB 5811, LL 5811, VY 6129
11:15IB 2603 to Buenos Aires leaves the gatealso LL 2603, AY 5353, QR 6953
18 h 50 apart on the timetable, overnight
IB 2603 leaves 18 h 50 after QR 3774 arrives on the timetable: more than half a day, so not a connection we count.