AA 873 then UA 2230 at O'Hare
Atlanta → Chicago → Cleveland
Timetable, Chicago time
13:18AA 873 from Atlanta at the gate
12:54UA 2230 to Cleveland leaves the gate
23 h 36 apart on the timetable, overnight
UA 2230 leaves 23 h 36 after AA 873 arrives on the timetable: more than half a day, so not a connection we count.