EC 4211 then QR 3683 at Barcelona
Napoli → Barcelona → Santander
Timetable, Barcelona time
17:00EC 4211 from Napoli at the gate
16:05QR 3683 to Santander leaves the gate
23 h 05 apart on the timetable, overnight
QR 3683 leaves 23 h 05 after EC 4211 arrives on the timetable: more than half a day, so not a connection we count.