BA 1401 then AA 141 at Heathrow
Belfast City → London → New York JFK
Timetable, London time
18:25BA 1401 from Belfast City at the gate
17:00AA 141 to New York JFK leaves the gate
22 h 35 apart on the timetable, overnight
AA 141 leaves 22 h 35 after BA 1401 arrives on the timetable: more than half a day, so not a connection we count.