AA 3852 then FX 9791 at O'Hare
Chattanooga → Chicago → Anchorage
Timetable, Chicago time
11:10AA 3852 from Chattanooga 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 3852 arrives on the timetable: more than half a day, so not a connection we count.