DL 4944 then BA 180 at JFK
Burlington → New York → London Heathrow
Timetable, New York time
17:54DL 4944 from Burlington at the gate
17:50BA 180 to London Heathrow leaves the gate
23 h 56 apart on the timetable, overnight
BA 180 leaves 23 h 56 after DL 4944 arrives on the timetable: more than half a day, so not a connection we count.