AA 2146 then K4 810 at O'Hare
Boston → Chicago → Anchorage
Timetable, Chicago time
08:00AA 2146 from Boston at the gate
04:00K4 810 to Anchorage leaves the gate
20 h apart on the timetable, overnight
K4 810 leaves 20 h after AA 2146 arrives on the timetable: more than half a day, so not a connection we count.