AA 9866 then AA 4226 at O'Hare
Bloomington-Normal → Chicago → Dayton
Timetable, Chicago time
13:11AA 9866 from Bloomington-Normal at the gate
08:15AA 4226 to Dayton leaves the gate
19 h 04 apart on the timetable, overnight
AA 4226 leaves 19 h 04 after AA 9866 arrives on the timetable: more than half a day, so not a connection we count.