BA 1347 then BA 181 at Heathrow
Saint Helier → London → New York JFK
Timetable, London time
11:45BA 1347 from Saint Helier at the gate
10:35BA 181 to New York JFK leaves the gate
22 h 50 apart on the timetable, overnight
BA 181 leaves 22 h 50 after BA 1347 arrives on the timetable: more than half a day, so not a connection we count.