AA 1047 then FX 9791 at O'Hare
Philadelphia → Chicago → Anchorage
Timetable, Chicago time
11:05AA 1047 from Philadelphia at the gate
04:00FX 9791 to Anchorage leaves the gate
16 h 55 apart on the timetable, overnight
FX 9791 leaves 16 h 55 after AA 1047 arrives on the timetable: more than half a day, so not a connection we count.