IB 5403 then QR 3655 at Barcelona
London Gatwick → Barcelona → Valletta
Timetable, Barcelona time
16:15IB 5403 from London Gatwick at the gatealso LL 5403, VY 7607, BA 8061
13:00QR 3655 to Valletta leaves the gatealso IB 5118, LL 5118, LA 5778
20 h 45 apart on the timetable, overnight
QR 3655 leaves 20 h 45 after IB 5403 arrives on the timetable: more than half a day, so not a connection we count.