DL 706 then DL 1126 at Atlanta
Denver → Atlanta → Louisville
Timetable, Atlanta time
18:01DL 706 from Denver at the gate
15:32DL 1126 to Louisville leaves the gate
21 h 31 apart on the timetable, overnight
DL 1126 leaves 21 h 31 after DL 706 arrives on the timetable: more than half a day, so not a connection we count.