AA 3815 then AA 4603 at O'Hare
Hartford → Chicago → Louisville
Timetable, Chicago time
20:15AA 3815 from Hartford at the gate
18:55AA 4603 to Louisville leaves the gate
22 h 40 apart on the timetable, overnight
AA 4603 leaves 22 h 40 after AA 3815 arrives on the timetable: more than half a day, so not a connection we count.