BA 678 then KM 785 at Istanbul
London Heathrow → Istanbul → Valletta
Timetable, Istanbul time
17:35BA 678 from London Heathrow at the gate
11:35KM 785 to Valletta leaves the gate
18 h apart on the timetable, overnight
KM 785 leaves 18 h after BA 678 arrives on the timetable: more than half a day, so not a connection we count.