IB 5379 then IB 5418 at Barcelona
Santander → Barcelona → London Gatwick
Timetable, Barcelona time
19:05IB 5379 from Santander at the gate
18:00IB 5418 to London Gatwick leaves the gatealso LL 5418, VY 7622
22 h 55 apart on the timetable, overnight
IB 5418 leaves 22 h 55 after IB 5379 arrives on the timetable: more than half a day, so not a connection we count.