DL 1223 then DL 2571 at Atlanta
Cincinnati → Atlanta → Knoxville
Timetable, Atlanta time
16:33DL 1223 from Cincinnati at the gate
16:25DL 2571 to Knoxville leaves the gate
23 h 52 apart on the timetable, overnight
DL 2571 leaves 23 h 52 after DL 1223 arrives on the timetable: more than half a day, so not a connection we count.