AA 4209 then AA 1828 at Charlotte
Springfield → Charlotte → Boston
Timetable, Charlotte time
14:44AA 4209 from Springfield at the gate
17:40AA 1828 to Boston leaves the gate
2 h 56 apart on the timetable
The last days
AA 4209 and AA 1828 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.