DL 5232 then WN 1638 at Detroit
Memphis → Detroit → Denver
Timetable, Detroit time
20:50DL 5232 from Memphis at the gate
16:15WN 1638 to Denver leaves the gate
19 h 25 apart on the timetable, overnight
WN 1638 leaves 19 h 25 after DL 5232 arrives on the timetable: more than half a day, so not a connection we count.