AA 642 then AA 4123 at O'Hare
Dallas-Fort Worth → Chicago → Little Rock
Timetable, Chicago time
13:10AA 642 from Dallas-Fort Worth at the gate
09:40AA 4123 to Little Rock leaves the gate
20 h 30 apart on the timetable, overnight
AA 4123 leaves 20 h 30 after AA 642 arrives on the timetable: more than half a day, so not a connection we count.