AA 4006 then FX 9791 at O'Hare
El Paso → Chicago → Anchorage
Timetable, Chicago time
11:54AA 4006 from El Paso at the gate
04:00FX 9791 to Anchorage leaves the gate
16 h 06 apart on the timetable, overnight
FX 9791 leaves 16 h 06 after AA 4006 arrives on the timetable: more than half a day, so not a connection we count.