AA 1431 then FX 9791 at O'Hare
Miami → Chicago → Anchorage
Timetable, Chicago time
11:10AA 1431 from Miami at the gate
04:00FX 9791 to Anchorage leaves the gate
16 h 50 apart on the timetable, overnight
FX 9791 leaves 16 h 50 after AA 1431 arrives on the timetable: more than half a day, so not a connection we count.