AA 9908 then UA 659 at O'Hare
Milwaukee → Chicago → Reno
Timetable, Chicago time
13:50AA 9908 from Milwaukee at the gate
10:42UA 659 to Reno leaves the gate
20 h 52 apart on the timetable, overnight
UA 659 leaves 20 h 52 after AA 9908 arrives on the timetable: more than half a day, so not a connection we count.