UA 4077 then AA 5447 at Dulles
Philadelphia → Washington → Charlotte
Timetable, Washington time
11:40UA 4077 from Philadelphia at the gate
17:44AA 5447 to Charlotte leaves the gate
6 h 04 apart on the timetable
The last days
UA 4077 and AA 5447 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.