AA 6192 then AA 2151 at O'Hare
Milwaukee → Chicago → Nashville
Timetable, Chicago time
09:05AA 6192 from Milwaukee at the gate
21:10AA 2151 to Nashville leaves the gate
12 h 05 apart on the timetable
AA 2151 leaves 12 h 05 after AA 6192 arrives on the timetable: more than half a day, so not a connection we count.