AA 5278 then AA 3178 at Charlotte
Lexington → Charlotte → Chicago O'Hare
Timetable, Charlotte time
07:56AA 5278 from Lexington at the gate
16:16AA 3178 to Chicago O'Hare leaves the gate
8 h 20 apart on the timetable
The last days
AA 5278 and AA 3178 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.