AA 4381 then K4 810 at O'Hare
Grand Rapids → Chicago → Anchorage
Timetable, Chicago time
06:09AA 4381 from Grand Rapids at the gate
04:00K4 810 to Anchorage leaves the gate
21 h 51 apart on the timetable, overnight
K4 810 leaves 21 h 51 after AA 4381 arrives on the timetable: more than half a day, so not a connection we count.