IB 5405 then QR 3683 at Barcelona
London Gatwick → Barcelona → Santander
Timetable, Barcelona time
16:55IB 5405 from London Gatwick at the gatealso LL 5405, VY 7609, BA 8063
16:05QR 3683 to Santander leaves the gate
23 h 10 apart on the timetable, overnight
QR 3683 leaves 23 h 10 after IB 5405 arrives on the timetable: more than half a day, so not a connection we count.