AA 9866 then UA 2220 at O'Hare
Bloomington-Normal → Chicago → Boston
Timetable, Chicago time
13:11AA 9866 from Bloomington-Normal at the gate
12:11UA 2220 to Boston leaves the gate
23 h apart on the timetable, overnight
UA 2220 leaves 23 h after AA 9866 arrives on the timetable: more than half a day, so not a connection we count.