QR 3733 then IB 5414 at Barcelona
Mahón → Barcelona → London Gatwick
Timetable, Barcelona time
19:25QR 3733 from Mahón at the gate
14:55IB 5414 to London Gatwick leaves the gatealso LL 5414, VY 7618, BA 8072
19 h 30 apart on the timetable, overnight
IB 5414 leaves 19 h 30 after QR 3733 arrives on the timetable: more than half a day, so not a connection we count.