AA 9866 then UA 4420 at O'Hare
Bloomington-Normal → Chicago → Little Rock
Timetable, Chicago time
13:11AA 9866 from Bloomington-Normal at the gate
12:29UA 4420 to Little Rock leaves the gate
23 h 18 apart on the timetable, overnight
UA 4420 leaves 23 h 18 after AA 9866 arrives on the timetable: more than half a day, so not a connection we count.