AA 4919 then 7L 789 at O'Hare
Milwaukee → Chicago → Baku
Timetable, Chicago time
12:49AA 4919 from Milwaukee at the gate
10:007L 789 to Baku leaves the gate
21 h 11 apart on the timetable, overnight
7L 789 leaves 21 h 11 after AA 4919 arrives on the timetable: more than half a day, so not a connection we count.