DL 1248 then DL 1126 at Atlanta
Harrisburg → Atlanta → Louisville
Timetable, Atlanta time
16:08DL 1248 from Harrisburg at the gate
15:32DL 1126 to Louisville leaves the gate
23 h 24 apart on the timetable, overnight
DL 1126 leaves 23 h 24 after DL 1248 arrives on the timetable: more than half a day, so not a connection we count.