AA 2273 then 7L 789 at O'Hare
San Diego → Chicago → Baku
Timetable, Chicago time
14:00AA 2273 from San Diego at the gate
10:007L 789 to Baku leaves the gate
20 h apart on the timetable, overnight
7L 789 leaves 20 h after AA 2273 arrives on the timetable: more than half a day, so not a connection we count.