DL 8819 then DL 3964 at Detroit
Green Bay → Detroit → Grand Rapids
Timetable, Detroit time
13:41DL 8819 from Green Bay at the gate
09:00DL 3964 to Grand Rapids leaves the gate
19 h 19 apart on the timetable, overnight
DL 3964 leaves 19 h 19 after DL 8819 arrives on the timetable: more than half a day, so not a connection we count.