DL 1680 then DL 724 at Atlanta
Cincinnati → Atlanta → Knoxville
Timetable, Atlanta time
21:43DL 1680 from Cincinnati at the gate
12:59DL 724 to Knoxville leaves the gate
15 h 16 apart on the timetable, overnight
DL 724 leaves 15 h 16 after DL 1680 arrives on the timetable: more than half a day, so not a connection we count.