AA 3815 then AA 3398 at O'Hare
Hartford → Chicago → Columbia Regional
Timetable, Chicago time
20:15AA 3815 from Hartford at the gate
16:21AA 3398 to Columbia Regional leaves the gate
20 h 06 apart on the timetable, overnight
AA 3398 leaves 20 h 06 after AA 3815 arrives on the timetable: more than half a day, so not a connection we count.