AA 3815 then UA 4479 at O'Hare
Hartford → Chicago → Huntsville
Timetable, Chicago time
20:15AA 3815 from Hartford at the gate
19:50UA 4479 to Huntsville leaves the gate
23 h 35 apart on the timetable, overnight
UA 4479 leaves 23 h 35 after AA 3815 arrives on the timetable: more than half a day, so not a connection we count.