AA 4993 then UA 5201 at O'Hare
Milwaukee → Chicago → Milwaukee
Timetable, Chicago time
06:24AA 4993 from Milwaukee at the gate
20:00UA 5201 to Milwaukee leaves the gate
13 h 36 apart on the timetable
UA 5201 leaves 13 h 36 after AA 4993 arrives on the timetable: more than half a day, so not a connection we count.