AA 3815 then AA 40 at O'Hare
Hartford → Chicago → Barcelona
Timetable, Chicago time
20:15AA 3815 from Hartford at the gate
19:00AA 40 to Barcelona leaves the gate
22 h 45 apart on the timetable, overnight
AA 40 leaves 22 h 45 after AA 3815 arrives on the timetable: more than half a day, so not a connection we count.