AA 3238 then UA 6246 at Dulles
Charlotte → Washington → Detroit
Timetable, Washington time
14:56AA 3238 from Charlotte at the gate
17:15UA 6246 to Detroit leaves the gate
2 h 19 apart on the timetable
The last days
AA 3238 and UA 6246 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.