DL 3848 then UA 1001 at Detroit
Milwaukee → Detroit → Denver
Timetable, Detroit time
15:28DL 3848 from Milwaukee at the gate
15:24UA 1001 to Denver leaves the gate
23 h 56 apart on the timetable, overnight
UA 1001 leaves 23 h 56 after DL 3848 arrives on the timetable: more than half a day, so not a connection we count.