AA 3815 then AA 2840 at O'Hare
Hartford → Chicago → Philadelphia
Timetable, Chicago time
20:15AA 3815 from Hartford at the gate
15:21AA 2840 to Philadelphia leaves the gate
19 h 06 apart on the timetable, overnight
AA 2840 leaves 19 h 06 after AA 3815 arrives on the timetable: more than half a day, so not a connection we count.