BA 309 then UA 935 at Heathrow
Paris Charles de Gaulle → London → Los Angeles
Timetable, London time
15:35BA 309 from Paris Charles de Gaulle at the gate
15:20UA 935 to Los Angeles leaves the gate
23 h 45 apart on the timetable, overnight
UA 935 leaves 23 h 45 after BA 309 arrives on the timetable: more than half a day, so not a connection we count.