DL 1605 then DL 4646 at Detroit
Fort Lauderdale → Detroit → Harrisburg
Timetable, Detroit time
15:54DL 1605 from Fort Lauderdale at the gate
15:00DL 4646 to Harrisburg leaves the gate
23 h 06 apart on the timetable, overnight
DL 4646 leaves 23 h 06 after DL 1605 arrives on the timetable: more than half a day, so not a connection we count.