UA 2806 then DL 996 at Atlanta
Denver → Atlanta → Los Angeles
Timetable, Atlanta time
15:12UA 2806 from Denver at the gate
07:00DL 996 to Los Angeles leaves the gate
15 h 48 apart on the timetable, overnight
DL 996 leaves 15 h 48 after UA 2806 arrives on the timetable: more than half a day, so not a connection we count.