AA 596 then AA 815 at Charlotte
Las Vegas → Charlotte → Chicago O'Hare
Timetable, Charlotte time
13:25AA 596 from Las Vegas at the gate
21:40AA 815 to Chicago O'Hare leaves the gate
8 h 15 apart on the timetable
The last days
AA 596 and AA 815 weren’t both flown 15 min to 12 h apart in the last 21 days.
Statistics from past flights, not live flight information. Always check times and your connection with your airline, and don’t base travel or booking decisions on these numbers.