AA 4527 then UA 6016 at O'Hare
Baltimore → Chicago → Green Bay
Timetable, Chicago time
20:17AA 4527 from Baltimore at the gate
19:52UA 6016 to Green Bay leaves the gate
23 h 35 apart on the timetable, overnight
UA 6016 leaves 23 h 35 after AA 4527 arrives on the timetable: more than half a day, so not a connection we count.