IB 5129 then LA 5747 at Barcelona
Alicante → Barcelona → Santander
Timetable, Barcelona time
08:05IB 5129 from Alicante at the gate
20:15LA 5747 to Santander leaves the gate
12 h 10 apart on the timetable
LA 5747 leaves 12 h 10 after IB 5129 arrives on the timetable: more than half a day, so not a connection we count.