AA 2137 then UA 5539 at O'Hare
Austin → Chicago → Moline
Timetable, Chicago time
09:00AA 2137 from Austin at the gate
21:47UA 5539 to Moline leaves the gate
12 h 47 apart on the timetable
UA 5539 leaves 12 h 47 after AA 2137 arrives on the timetable: more than half a day, so not a connection we count.