AA 3739 then 7L 789 at O'Hare
Omaha → Chicago → Baku
Timetable, Chicago time
14:12AA 3739 from Omaha at the gate
10:007L 789 to Baku leaves the gate
19 h 48 apart on the timetable, overnight
7L 789 leaves 19 h 48 after AA 3739 arrives on the timetable: more than half a day, so not a connection we count.