BA 569 then BA 115 at Heathrow
Milan Linate → London → New York JFK
Timetable, London time
14:30BA 569 from Milan Linate at the gate
14:15BA 115 to New York JFK leaves the gate
23 h 45 apart on the timetable, overnight
BA 115 leaves 23 h 45 after BA 569 arrives on the timetable: more than half a day, so not a connection we count.