DL 939 then AF 9664 at JFK
Los Angeles → New York → London Heathrow
Timetable, New York time
20:59DL 939 from Los Angeles at the gate
19:01AF 9664 to London Heathrow leaves the gate
22 h 02 apart on the timetable, overnight
AF 9664 leaves 22 h 02 after DL 939 arrives on the timetable: more than half a day, so not a connection we count.