UA 4517 then AA 5078 at Charlotte
Washington → Charlotte → Birmingham (Alabama)
Timetable, Charlotte time
14:20UA 4517 from Washington at the gate
18:05AA 5078 to Birmingham (Alabama) leaves the gate
3 h 45 apart on the timetable
The last days
UA 4517 and AA 5078 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.