AA 4669 then UA 4550 at O'Hare
Madison → Chicago → Columbia Regional
Timetable, Chicago time
08:00AA 4669 from Madison at the gate
21:25UA 4550 to Columbia Regional leaves the gate
13 h 25 apart on the timetable
UA 4550 leaves 13 h 25 after AA 4669 arrives on the timetable: more than half a day, so not a connection we count.