UA 3501 then AA 4601 at O'Hare
Detroit → Chicago → Madison
Timetable, Chicago time
06:57UA 3501 from Detroit at the gate
22:00AA 4601 to Madison leaves the gate
15 h 03 apart on the timetable
AA 4601 leaves 15 h 03 after UA 3501 arrives on the timetable: more than half a day, so not a connection we count.