F9 1441 then UA 4166 at O'Hare
Atlanta → Chicago → Madison
Timetable, Chicago time
12:51F9 1441 from Atlanta at the gate
10:55UA 4166 to Madison leaves the gate
22 h 04 apart on the timetable, overnight
UA 4166 leaves 22 h 04 after F9 1441 arrives on the timetable: more than half a day, so not a connection we count.