IB 5379 then IB 5416 at Barcelona
Santander → Barcelona → London Gatwick
Timetable, Barcelona time
19:05IB 5379 from Santander at the gate
17:05IB 5416 to London Gatwick leaves the gatealso LL 5416, VY 7620, BA 8074
22 h apart on the timetable, overnight
IB 5416 leaves 22 h after IB 5379 arrives on the timetable: more than half a day, so not a connection we count.