UA 702 then DL 5258 at Atlanta
San Francisco → Atlanta → Knoxville
Timetable, Atlanta time
18:07UA 702 from San Francisco at the gate
17:45DL 5258 to Knoxville leaves the gate
23 h 38 apart on the timetable, overnight
DL 5258 leaves 23 h 38 after UA 702 arrives on the timetable: more than half a day, so not a connection we count.