AA 4505 then AA 359 at Boston
Washington National → Boston → Charlotte
Timetable, Boston time
10:48AA 4505 from Washington National at the gate
14:39AA 359 to Charlotte leaves the gate
3 h 51 apart on the timetable
Boston’s board gives an arrival time for only about 58% of its flights, so many days show no gate time.
The last days
AA 4505 and AA 359 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.