AA 3865 then AA 591 at Charlotte
Hilton Head → Charlotte → Denver
Timetable, Charlotte time
13:48AA 3865 from Hilton Head at the gate
13:28AA 591 to Denver leaves the gate
23 h 40 apart on the timetable, overnight
AA 591 leaves 23 h 40 after AA 3865 arrives on the timetable: more than half a day, so not a connection we count.