AA 2009 then UA 5539 at O'Hare
Nashville → Chicago → Cleveland
Timetable, Chicago time
17:29AA 2009 from Nashville at the gate
10:45UA 5539 to Cleveland leaves the gate
17 h 16 apart on the timetable, overnight
UA 5539 leaves 17 h 16 after AA 2009 arrives on the timetable: more than half a day, so not a connection we count.