AA 4725 then UA 5201 at O'Hare
Dayton → Chicago → Milwaukee
Timetable, Chicago time
06:59AA 4725 from Dayton at the gate
20:00UA 5201 to Milwaukee leaves the gate
13 h 01 apart on the timetable
UA 5201 leaves 13 h 01 after AA 4725 arrives on the timetable: more than half a day, so not a connection we count.