AA 1920 then AA 2423 at Charlotte
Ontario → Charlotte → Chicago O'Hare
Timetable, Charlotte time
06:02AA 1920 from Ontario at the gate
14:47AA 2423 to Chicago O'Hare leaves the gate
8 h 45 apart on the timetable
The last days
AA 1920 and AA 2423 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.