QR 3754 then IB 5342 at Barcelona
Santander → Barcelona → Rome
Timetable, Barcelona time
19:05QR 3754 from Santander at the gate
14:40IB 5342 to Rome leaves the gatealso LL 5342
19 h 35 apart on the timetable, overnight
IB 5342 leaves 19 h 35 after QR 3754 arrives on the timetable: more than half a day, so not a connection we count.