AA 2578 then KD 211 at O'Hare
Boston → Chicago → Anchorage
Timetable, Chicago time
17:36AA 2578 from Boston at the gate
12:00KD 211 to Anchorage leaves the gate
18 h 24 apart on the timetable, overnight
KD 211 leaves 18 h 24 after AA 2578 arrives on the timetable: more than half a day, so not a connection we count.