AA 2154 then FX 9791 at O'Hare
Charleston (South Carolina) → Chicago → Anchorage
Timetable, Chicago time
09:00AA 2154 from Charleston (South Carolina) at the gate
04:00FX 9791 to Anchorage leaves the gate
19 h apart on the timetable, overnight
FX 9791 leaves 19 h after AA 2154 arrives on the timetable: more than half a day, so not a connection we count.