AA 5547 then AA 2530 at Charlotte
Savannah → Charlotte → Chicago O'Hare
Timetable, Charlotte time
10:11AA 5547 from Savannah at the gate
13:02AA 2530 to Chicago O'Hare leaves the gate
2 h 51 apart on the timetable
The last days
AA 5547 and AA 2530 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.