DL 2571 then DL 2398 at Atlanta
Knoxville → Atlanta → New York JFK
Timetable, Atlanta time
19:17DL 2571 from Knoxville at the gate
15:16DL 2398 to New York JFK leaves the gate
19 h 59 apart on the timetable, overnight
DL 2398 leaves 19 h 59 after DL 2571 arrives on the timetable: more than half a day, so not a connection we count.