DL 2599 then DL 1283 at Atlanta
Madison → Atlanta → Harrisburg
Timetable, Atlanta time
22:59DL 2599 from Madison at the gate
21:59DL 1283 to Harrisburg leaves the gate
23 h apart on the timetable, overnight
DL 1283 leaves 23 h after DL 2599 arrives on the timetable: more than half a day, so not a connection we count.