AA 1623 then AA 3326 at Charlotte
Denver → Charlotte → Austin
Timetable, Charlotte time
12:32AA 1623 from Denver at the gate
12:10AA 3326 to Austin leaves the gate
23 h 38 apart on the timetable, overnight
AA 3326 leaves 23 h 38 after AA 1623 arrives on the timetable: more than half a day, so not a connection we count.