AA 770 then AA 1202 at Miami
Charlotte → Miami → Chicago O'Hare
Timetable, Miami time
09:15AA 770 from Charlotte at the gate
13:02AA 1202 to Chicago O'Hare leaves the gate
3 h 47 apart on the timetable
The last days
AA 770 and AA 1202 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.