UA 1915 then DL 3875 at Detroit
Denver → Detroit → Columbus (Ohio)
Timetable, Detroit time
14:27UA 1915 from Denver at the gate
14:10DL 3875 to Columbus (Ohio) leaves the gate
23 h 43 apart on the timetable, overnight
DL 3875 leaves 23 h 43 after UA 1915 arrives on the timetable: more than half a day, so not a connection we count.