DL 1605 then DL 1454 at Detroit
Fort Lauderdale → Detroit → Washington National
Timetable, Detroit time
15:54DL 1605 from Fort Lauderdale at the gate
14:59DL 1454 to Washington National leaves the gate
23 h 05 apart on the timetable, overnight
DL 1454 leaves 23 h 05 after DL 1605 arrives on the timetable: more than half a day, so not a connection we count.