DL 1248 then DL 1386 at Atlanta
Harrisburg → Atlanta → Miami
Timetable, Atlanta time
16:08DL 1248 from Harrisburg at the gate
15:17DL 1386 to Miami leaves the gate
23 h 09 apart on the timetable, overnight
DL 1386 leaves 23 h 09 after DL 1248 arrives on the timetable: more than half a day, so not a connection we count.