AA 9908 then UA 1856 at O'Hare
Milwaukee → Chicago → Newark
Timetable, Chicago time
13:50AA 9908 from Milwaukee at the gate
10:39UA 1856 to Newark leaves the gate
20 h 49 apart on the timetable, overnight
UA 1856 leaves 20 h 49 after AA 9908 arrives on the timetable: more than half a day, so not a connection we count.