DL 725 then DL 5258 at Atlanta
San Diego → Atlanta → Knoxville
Timetable, Atlanta time
18:13DL 725 from San Diego at the gate
17:45DL 5258 to Knoxville leaves the gate
23 h 32 apart on the timetable, overnight
DL 5258 leaves 23 h 32 after DL 725 arrives on the timetable: more than half a day, so not a connection we count.