AA 947 then K4 810 at O'Hare
Boston → Chicago → Anchorage
Timetable, Chicago time
09:30AA 947 from Boston at the gate
04:00K4 810 to Anchorage leaves the gate
18 h 30 apart on the timetable, overnight
K4 810 leaves 18 h 30 after AA 947 arrives on the timetable: more than half a day, so not a connection we count.