AA 1809 then AA 2174 at Charlotte
Philadelphia → Charlotte → Denver
Timetable, Charlotte time
12:46AA 1809 from Philadelphia at the gate
13:35AA 2174 to Denver leaves the gate
49 min apart on the timetable
The last days
AA 1809 and AA 2174 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.