AA 3939 then AA 2797 at Charlotte
Key West → Charlotte → Nashville
Timetable, Charlotte time
21:44AA 3939 from Key West at the gate
21:41AA 2797 to Nashville leaves the gate
23 h 57 apart on the timetable, overnight
AA 2797 leaves 23 h 57 after AA 3939 arrives on the timetable: more than half a day, so not a connection we count.