DL 5161 then DL 5258 at Atlanta
Montgomery → Atlanta → Knoxville
Timetable, Atlanta time
20:35DL 5161 from Montgomery at the gate
17:45DL 5258 to Knoxville leaves the gate
21 h 10 apart on the timetable, overnight
DL 5258 leaves 21 h 10 after DL 5161 arrives on the timetable: more than half a day, so not a connection we count.