FR 59 then LA 5768 at Barcelona
Napoli → Barcelona → Santander
Timetable, Barcelona time
12:50FR 59 from Napoli at the gate
11:00LA 5768 to Santander leaves the gate
22 h 10 apart on the timetable, overnight
LA 5768 leaves 22 h 10 after FR 59 arrives on the timetable: more than half a day, so not a connection we count.