AA 4780 then K4 996 at O'Hare
Buffalo → Chicago → Anchorage
Timetable, Chicago time
12:40AA 4780 from Buffalo at the gate
04:15K4 996 to Anchorage leaves the gate
15 h 35 apart on the timetable, overnight
K4 996 leaves 15 h 35 after AA 4780 arrives on the timetable: more than half a day, so not a connection we count.