BA 309 then BA 876 at Heathrow
Paris Charles de Gaulle → London → Budapest
Timetable, London time
16:00BA 309 from Paris Charles de Gaulle at the gate
15:55BA 876 to Budapest leaves the gate
23 h 55 apart on the timetable, overnight
BA 876 leaves 23 h 55 after BA 309 arrives on the timetable: more than half a day, so not a connection we count.