BA 349 then BA 189 at Heathrow
Nice → London → Newark
Timetable, London time
21:05BA 349 from Nice at the gate
16:25BA 189 to Newark leaves the gate
19 h 20 apart on the timetable, overnight
BA 189 leaves 19 h 20 after BA 349 arrives on the timetable: more than half a day, so not a connection we count.