AA 2437 then AA 2174 at Charlotte
Pittsburgh → Charlotte → Denver
Timetable, Charlotte time
06:39AA 2437 from Pittsburgh at the gate
13:35AA 2174 to Denver leaves the gate
6 h 56 apart on the timetable
The last days
AA 2437 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.