AA 3815 then UA 2124 at O'Hare
Hartford → Chicago → Los Angeles
Timetable, Chicago time
20:15AA 3815 from Hartford at the gate
15:47UA 2124 to Los Angeles leaves the gate
19 h 32 apart on the timetable, overnight
UA 2124 leaves 19 h 32 after AA 3815 arrives on the timetable: more than half a day, so not a connection we count.