AA 1623 then AA 5506 at Charlotte
Denver → Charlotte → Memphis
Timetable, Charlotte time
12:32AA 1623 from Denver at the gate
12:22AA 5506 to Memphis leaves the gate
23 h 50 apart on the timetable, overnight
AA 5506 leaves 23 h 50 after AA 1623 arrives on the timetable: more than half a day, so not a connection we count.