UA 1220 then DL 5634 at Detroit
Denver → Detroit → Columbus (Ohio)
Timetable, Detroit time
22:15UA 1220 from Denver at the gate
17:50DL 5634 to Columbus (Ohio) leaves the gate
19 h 35 apart on the timetable, overnight
DL 5634 leaves 19 h 35 after UA 1220 arrives on the timetable: more than half a day, so not a connection we count.