AA 3523 then 7L 789 at O'Hare
Baltimore → Chicago → Baku
Timetable, Chicago time
12:59AA 3523 from Baltimore at the gate
10:007L 789 to Baku leaves the gate
21 h 01 apart on the timetable, overnight
7L 789 leaves 21 h 01 after AA 3523 arrives on the timetable: more than half a day, so not a connection we count.