BA 224 then BA 1398 at Heathrow
New Orleans → London → Belfast City
Timetable, London time
10:35BA 224 from New Orleans at the gate
10:05BA 1398 to Belfast City leaves the gate
23 h 30 apart on the timetable, overnight
BA 1398 leaves 23 h 30 after BA 224 arrives on the timetable: more than half a day, so not a connection we count.