F9 1362 then AA 3939 at Charlotte
Denver → Charlotte → Key West
Timetable, Charlotte time
15:56F9 1362 from Denver at the gate
15:35AA 3939 to Key West leaves the gate
23 h 39 apart on the timetable, overnight
AA 3939 leaves 23 h 39 after F9 1362 arrives on the timetable: more than half a day, so not a connection we count.