DL 5856 then DL 3964 at Detroit
Pittsburgh → Detroit → Grand Rapids
Timetable, Detroit time
13:28DL 5856 from Pittsburgh at the gate
09:00DL 3964 to Grand Rapids leaves the gate
19 h 32 apart on the timetable, overnight
DL 3964 leaves 19 h 32 after DL 5856 arrives on the timetable: more than half a day, so not a connection we count.