AA 4102 then 7L 789 at O'Hare
Denver → Chicago → Baku
Timetable, Chicago time
12:55AA 4102 from Denver at the gate
10:007L 789 to Baku leaves the gate
21 h 05 apart on the timetable, overnight
7L 789 leaves 21 h 05 after AA 4102 arrives on the timetable: more than half a day, so not a connection we count.