AA 3815 then UA 2840 at O'Hare
Hartford → Chicago → Austin
Timetable, Chicago time
20:15AA 3815 from Hartford at the gate
16:00UA 2840 to Austin leaves the gate
19 h 45 apart on the timetable, overnight
UA 2840 leaves 19 h 45 after AA 3815 arrives on the timetable: more than half a day, so not a connection we count.