AA 2633 then FX 9791 at O'Hare
Washington National → Chicago → Anchorage
Timetable, Chicago time
09:11AA 2633 from Washington National at the gate
04:00FX 9791 to Anchorage leaves the gate
18 h 49 apart on the timetable, overnight
FX 9791 leaves 18 h 49 after AA 2633 arrives on the timetable: more than half a day, so not a connection we count.