BA 1311 then BA 1410 at Heathrow
Aberdeen → London → Belfast City
Timetable, London time
18:10BA 1311 from Aberdeen at the gate
17:45BA 1410 to Belfast City leaves the gate
23 h 35 apart on the timetable, overnight
BA 1410 leaves 23 h 35 after BA 1311 arrives on the timetable: more than half a day, so not a connection we count.