DL 1248 then DL 4137 at Atlanta
Harrisburg → Atlanta → Shreveport
Timetable, Atlanta time
16:08DL 1248 from Harrisburg at the gate
15:40DL 4137 to Shreveport leaves the gate
23 h 32 apart on the timetable, overnight
DL 4137 leaves 23 h 32 after DL 1248 arrives on the timetable: more than half a day, so not a connection we count.