DL 2104 then DL 5258 at Atlanta
Austin → Atlanta → Knoxville
Timetable, Atlanta time
18:19DL 2104 from Austin at the gate
17:45DL 5258 to Knoxville leaves the gate
23 h 26 apart on the timetable, overnight
DL 5258 leaves 23 h 26 after DL 2104 arrives on the timetable: more than half a day, so not a connection we count.