AA 3815 then AA 4271 at O'Hare
Hartford → Chicago → Allentown
Timetable, Chicago time
20:15AA 3815 from Hartford at the gate
19:49AA 4271 to Allentown leaves the gate
23 h 34 apart on the timetable, overnight
AA 4271 leaves 23 h 34 after AA 3815 arrives on the timetable: more than half a day, so not a connection we count.