B6 1520 then DL 4944 at JFK
Atlanta → New York → Burlington
Timetable, New York time
12:30B6 1520 from Atlanta at the gate
12:20DL 4944 to Burlington leaves the gate
23 h 50 apart on the timetable, overnight
DL 4944 leaves 23 h 50 after B6 1520 arrives on the timetable: more than half a day, so not a connection we count.