K4 221 then UA 4166 at O'Hare
Anchorage → Chicago → Madison
Timetable, Chicago time
13:41K4 221 from Anchorage at the gate
10:45UA 4166 to Madison leaves the gate
21 h 04 apart on the timetable, overnight
UA 4166 leaves 21 h 04 after K4 221 arrives on the timetable: more than half a day, so not a connection we count.