DL 924 then DL 5258 at Atlanta
San Diego → Atlanta → Knoxville
Timetable, Atlanta time
19:59DL 924 from San Diego at the gate
17:45DL 5258 to Knoxville leaves the gate
21 h 46 apart on the timetable, overnight
DL 5258 leaves 21 h 46 after DL 924 arrives on the timetable: more than half a day, so not a connection we count.