AA 3507 then UA 5201 at O'Hare
Moline → Chicago → Milwaukee
Timetable, Chicago time
07:25AA 3507 from Moline at the gate
20:00UA 5201 to Milwaukee leaves the gate
12 h 35 apart on the timetable
UA 5201 leaves 12 h 35 after AA 3507 arrives on the timetable: more than half a day, so not a connection we count.