BA 349 then BA 289 at Heathrow
Nice → London → Phoenix
Timetable, London time
21:05BA 349 from Nice at the gate
14:35BA 289 to Phoenix leaves the gate
17 h 30 apart on the timetable, overnight
BA 289 leaves 17 h 30 after BA 349 arrives on the timetable: more than half a day, so not a connection we count.