BA 1349 then BA 115 at Heathrow
Saint Helier → London → New York JFK
Timetable, London time
16:20BA 1349 from Saint Helier at the gate
14:15BA 115 to New York JFK leaves the gate
21 h 55 apart on the timetable, overnight
BA 115 leaves 21 h 55 after BA 1349 arrives on the timetable: more than half a day, so not a connection we count.