DL 706 then DL 2780 at Atlanta
Denver → Atlanta → Dallas
Timetable, Atlanta time
18:01DL 706 from Denver at the gate
16:46DL 2780 to Dallas leaves the gate
22 h 45 apart on the timetable, overnight
DL 2780 leaves 22 h 45 after DL 706 arrives on the timetable: more than half a day, so not a connection we count.