AA 4178 then AA 3060 at Charlotte
Savannah → Charlotte → St Louis
Timetable, Charlotte time
14:35AA 4178 from Savannah at the gate
14:55AA 3060 to St Louis leaves the gate
20 min apart on the timetable
The last days
AA 4178 and AA 3060 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.