DL 957 then DL 5258 at Atlanta
Denver → Atlanta → Knoxville
Timetable, Atlanta time
19:14DL 957 from Denver at the gate
17:45DL 5258 to Knoxville leaves the gate
22 h 31 apart on the timetable, overnight
DL 5258 leaves 22 h 31 after DL 957 arrives on the timetable: more than half a day, so not a connection we count.