AA 9908 then UA 2653 at O'Hare
Milwaukee → Chicago → Baltimore
Timetable, Chicago time
13:50AA 9908 from Milwaukee at the gate
11:00UA 2653 to Baltimore leaves the gate
21 h 10 apart on the timetable, overnight
UA 2653 leaves 21 h 10 after AA 9908 arrives on the timetable: more than half a day, so not a connection we count.