AA 3815 then AA 1173 at O'Hare
Hartford → Chicago → Pittsburgh
Timetable, Chicago time
20:15AA 3815 from Hartford at the gate
18:30AA 1173 to Pittsburgh leaves the gate
22 h 15 apart on the timetable, overnight
AA 1173 leaves 22 h 15 after AA 3815 arrives on the timetable: more than half a day, so not a connection we count.