DL 706 then DL 843 at Atlanta
Denver → Atlanta → San Diego
Timetable, Atlanta time
18:01DL 706 from Denver at the gate
14:51DL 843 to San Diego leaves the gate
20 h 50 apart on the timetable, overnight
DL 843 leaves 20 h 50 after DL 706 arrives on the timetable: more than half a day, so not a connection we count.