AA 5804 then AA 4651 at Philadelphia
Buffalo → Philadelphia → St Louis
Timetable, Philadelphia time
16:50AA 5804 from Buffalo at the gate
18:40AA 4651 to St Louis leaves the gate
1 h 50 apart on the timetable
The last days
AA 5804 and AA 4651 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.