BA 339 then AA 733 at Heathrow
Nice → London → Charlotte
Timetable, London time
12:25BA 339 from Nice at the gate
11:45AA 733 to Charlotte leaves the gate
23 h 20 apart on the timetable, overnight
AA 733 leaves 23 h 20 after BA 339 arrives on the timetable: more than half a day, so not a connection we count.