QR 3733 then IB 5418 at Barcelona
Mahón → Barcelona → London Gatwick
Timetable, Barcelona time
19:25QR 3733 from Mahón at the gate
18:00IB 5418 to London Gatwick leaves the gatealso LL 5418, VY 7622, BA 8076
22 h 35 apart on the timetable, overnight
IB 5418 leaves 22 h 35 after QR 3733 arrives on the timetable: more than half a day, so not a connection we count.