AA 3539 then 7L 789 at O'Hare
Moline → Chicago → Baku
Timetable, Chicago time
12:36AA 3539 from Moline at the gate
10:007L 789 to Baku leaves the gate
21 h 24 apart on the timetable, overnight
7L 789 leaves 21 h 24 after AA 3539 arrives on the timetable: more than half a day, so not a connection we count.