AA 3815 then AA 4784 at O'Hare
Hartford → Chicago → Cleveland
Timetable, Chicago time
20:15AA 3815 from Hartford at the gate
17:35AA 4784 to Cleveland leaves the gate
21 h 20 apart on the timetable, overnight
AA 4784 leaves 21 h 20 after AA 3815 arrives on the timetable: more than half a day, so not a connection we count.