QR 3530 then W9 5378 at Barcelona
Palma de Mallorca → Barcelona → London Luton
Timetable, Barcelona time
16:15QR 3530 from Palma de Mallorca at the gate
16:10W9 5378 to London Luton leaves the gate
23 h 55 apart on the timetable, overnight
W9 5378 leaves 23 h 55 after QR 3530 arrives on the timetable: more than half a day, so not a connection we count.