IB 5341 then QR 3683 at Barcelona
Rome → Barcelona → Santander
Timetable, Barcelona time
17:05IB 5341 from Rome at the gatealso LL 5341, VY 6011
16:05QR 3683 to Santander leaves the gate
23 h apart on the timetable, overnight
QR 3683 leaves 23 h after IB 5341 arrives on the timetable: more than half a day, so not a connection we count.