B6 519 then DL 5245 at Atlanta
New York JFK → Atlanta → Knoxville
Timetable, Atlanta time
09:16B6 519 from New York JFK at the gate
08:11DL 5245 to Knoxville leaves the gate
22 h 55 apart on the timetable, overnight
DL 5245 leaves 22 h 55 after B6 519 arrives on the timetable: more than half a day, so not a connection we count.