AA 730 then BA 750 at Heathrow
Charlotte → London → Geneva
Timetable, London time
07:20AA 730 from Charlotte at the gate
19:55BA 750 to Geneva leaves the gate
12 h 35 apart on the timetable
BA 750 leaves 12 h 35 after AA 730 arrives on the timetable: more than half a day, so not a connection we count.