DL 706 then DL 727 at Atlanta
Denver → Atlanta → Washington National
Timetable, Atlanta time
21:24DL 706 from Denver at the gate
19:59DL 727 to Washington National leaves the gate
22 h 35 apart on the timetable, overnight
DL 727 leaves 22 h 35 after DL 706 arrives on the timetable: more than half a day, so not a connection we count.