F9 1441 then AA 4748 at O'Hare
Atlanta → Chicago → Pittsburgh
Timetable, Chicago time
12:51F9 1441 from Atlanta at the gate
09:45AA 4748 to Pittsburgh leaves the gate
20 h 54 apart on the timetable, overnight
AA 4748 leaves 20 h 54 after F9 1441 arrives on the timetable: more than half a day, so not a connection we count.