DL 1558 then DL 3964 at Detroit
Washington National → Detroit → Grand Rapids
Timetable, Detroit time
11:22DL 1558 from Washington National at the gate
09:00DL 3964 to Grand Rapids leaves the gate
21 h 38 apart on the timetable, overnight
DL 3964 leaves 21 h 38 after DL 1558 arrives on the timetable: more than half a day, so not a connection we count.