F9 2387 then AA 1831 at Charlotte
Philadelphia → Charlotte → Key West
Timetable, Charlotte time
10:40F9 2387 from Philadelphia at the gate
10:18AA 1831 to Key West leaves the gate
23 h 38 apart on the timetable, overnight
AA 1831 leaves 23 h 38 after F9 2387 arrives on the timetable: more than half a day, so not a connection we count.