BA 449 then B6 2220 at Heathrow
Amsterdam → London → New York JFK
Timetable, London time
07:45BA 449 from Amsterdam at the gate
07:25B6 2220 to New York JFK leaves the gate
23 h 40 apart on the timetable, overnight
B6 2220 leaves 23 h 40 after BA 449 arrives on the timetable: more than half a day, so not a connection we count.