DL 706 then DL 836 at Atlanta
Denver → Atlanta → Phoenix
Timetable, Atlanta time
18:01DL 706 from Denver at the gate
16:25DL 836 to Phoenix leaves the gate
22 h 24 apart on the timetable, overnight
DL 836 leaves 22 h 24 after DL 706 arrives on the timetable: more than half a day, so not a connection we count.