BA 1349 then UA 15 at Heathrow
Saint Helier → London → Newark
Timetable, London time
16:20BA 1349 from Saint Helier at the gate
15:10UA 15 to Newark leaves the gate
22 h 50 apart on the timetable, overnight
UA 15 leaves 22 h 50 after BA 1349 arrives on the timetable: more than half a day, so not a connection we count.