AA 1623 then AA 6099 at Charlotte
Denver → Charlotte → Greenville-Spartanburg
Timetable, Charlotte time
12:32AA 1623 from Denver at the gate
12:15AA 6099 to Greenville-Spartanburg leaves the gate
23 h 43 apart on the timetable, overnight
AA 6099 leaves 23 h 43 after AA 1623 arrives on the timetable: more than half a day, so not a connection we count.