AA 3815 then AA 1743 at O'Hare
Hartford → Chicago → Philadelphia
Timetable, Chicago time
20:15AA 3815 from Hartford at the gate
17:29AA 1743 to Philadelphia leaves the gate
21 h 14 apart on the timetable, overnight
AA 1743 leaves 21 h 14 after AA 3815 arrives on the timetable: more than half a day, so not a connection we count.