AA 3815 then AA 2499 at O'Hare
Hartford → Chicago → Dallas-Fort Worth
Timetable, Chicago time
20:15AA 3815 from Hartford at the gate
17:16AA 2499 to Dallas-Fort Worth leaves the gate
21 h 01 apart on the timetable, overnight
AA 2499 leaves 21 h 01 after AA 3815 arrives on the timetable: more than half a day, so not a connection we count.