K4 221 then AA 482 at O'Hare
Anchorage → Chicago → Boston
Timetable, Chicago time
19:17K4 221 from Anchorage at the gate
12:06AA 482 to Boston leaves the gate
16 h 49 apart on the timetable, overnight
AA 482 leaves 16 h 49 after K4 221 arrives on the timetable: more than half a day, so not a connection we count.