DL 706 then DL 3122 at Atlanta
Denver → Atlanta → Pittsburgh
Timetable, Atlanta time
18:01DL 706 from Denver at the gate
17:08DL 3122 to Pittsburgh leaves the gate
23 h 07 apart on the timetable, overnight
DL 3122 leaves 23 h 07 after DL 706 arrives on the timetable: more than half a day, so not a connection we count.