BA 1347 then AA 103 at Heathrow
Saint Helier → London → New York JFK
Timetable, London time
11:50BA 1347 from Saint Helier at the gate
10:15AA 103 to New York JFK leaves the gate
22 h 25 apart on the timetable, overnight
AA 103 leaves 22 h 25 after BA 1347 arrives on the timetable: more than half a day, so not a connection we count.