UA 3514 then DL 3964 at Detroit
Newark → Detroit → Grand Rapids
Timetable, Detroit time
11:53UA 3514 from Newark at the gate
09:00DL 3964 to Grand Rapids leaves the gate
21 h 07 apart on the timetable, overnight
DL 3964 leaves 21 h 07 after UA 3514 arrives on the timetable: more than half a day, so not a connection we count.