AA 4103 then FX 9791 at O'Hare
Detroit → Chicago → Anchorage
Timetable, Chicago time
11:00AA 4103 from Detroit at the gate
04:00FX 9791 to Anchorage leaves the gate
17 h apart on the timetable, overnight
FX 9791 leaves 17 h after AA 4103 arrives on the timetable: more than half a day, so not a connection we count.