BA 172 then BA 962 at Heathrow
New York JFK → London → Hamburg
Timetable, London time
08:35BA 172 from New York JFK at the gate
06:45BA 962 to Hamburg leaves the gate
22 h 10 apart on the timetable, overnight
BA 962 leaves 22 h 10 after BA 172 arrives on the timetable: more than half a day, so not a connection we count.